[PATCH v3 0/8] status: V2 porcelain status

[PATCH v3 0/8] status: V2 porcelain status

[Jeff Hostetler]

This patch series adds porcelain V2 format to status.
This provides detailed information about file changes
and about the current branch.

The new output is accessed via:
    git status --porcelain=v2 [--branch]

Relative to the v2 patch series, in this v3 patch series
I have changed the format of the lines for ordinary changes
to make it easier to distinguish renames and copies from
normal entries.  I also split the --branch header information
onto separate lines, since we're not bound by any requirement
to have a single ## header line.  I document the argument
as --porcelain=v2, but silently also allow --porcelain=2.


Jeff Hostetler (8):
  status: rename long-format print routines
  status: cleanup API to wt_status_print
  status: support --porcelain[=<version>]
  status: per-file data collection for --porcelain=v2
  status: print per-file porcelain v2 status data
  status: print branch info with --porcelain=v2 --branch
  status: update git-status.txt for --porcelain=v2
  status: tests for --porcelain=v2

 Documentation/git-status.txt | 100 +++++++-
 builtin/commit.c             |  78 +++---
 t/t7060-wtstatus.sh          |  21 ++
 t/t7064-wtstatus-pv2.sh      | 585 +++++++++++++++++++++++++++++++++++++++++++
 wt-status.c                  | 567 ++++++++++++++++++++++++++++++++++++-----
 wt-status.h                  |  19 +-
 6 files changed, 1260 insertions(+), 110 deletions(-)
 create mode 100755 t/t7064-wtstatus-pv2.sh

-- 
2.8.0.rc4.17.gac42084.dirty

[PATCH v3 1/8] status: rename long-format print routines

[Jeff Hostetler]

From: Jeff Hostetler <jeffhost@microsoft.com>

Renamed the various wt_status_print*() routines to be
wt_longstatus_print*() to make it clear that these
routines are only concerned with the normal/long
status output.

This will hopefully reduce confusion as other status
formats are added in the future.

Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Jeff Hostetler <git@jeffhostetler.com>
---
 builtin/commit.c |   4 +-
 wt-status.c      | 110 +++++++++++++++++++++++++++----------------------------
 wt-status.h      |   2 +-
 3 files changed, 58 insertions(+), 58 deletions(-)

diff --git a/builtin/commit.c b/builtin/commit.c
index 1f6dbcd..b80273b 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -515,7 +515,7 @@ static int run_status(FILE *fp, const char *index_file, const char *prefix, int
 		break;
 	case STATUS_FORMAT_NONE:
 	case STATUS_FORMAT_LONG:
-		wt_status_print(s);
+		wt_longstatus_print(s);
 		break;
 	}
 
@@ -1403,7 +1403,7 @@ int cmd_status(int argc, const char **argv, const char *prefix)
 	case STATUS_FORMAT_LONG:
 		s.verbose = verbose;
 		s.ignore_submodule_arg = ignore_submodule_arg;
-		wt_status_print(&s);
+		wt_longstatus_print(&s);
 		break;
 	}
 	return 0;
diff --git a/wt-status.c b/wt-status.c
index de62ab2..b9a58fd 100644
--- a/wt-status.c
+++ b/wt-status.c
@@ -139,7 +139,7 @@ void wt_status_prepare(struct wt_status *s)
 	s->display_comment_prefix = 0;
 }
 
-static void wt_status_print_unmerged_header(struct wt_status *s)
+static void wt_longstatus_print_unmerged_header(struct wt_status *s)
 {
 	int i;
 	int del_mod_conflict = 0;
@@ -191,7 +191,7 @@ static void wt_status_print_unmerged_header(struct wt_status *s)
 	status_printf_ln(s, c, "%s", "");
 }
 
-static void wt_status_print_cached_header(struct wt_status *s)
+static void wt_longstatus_print_cached_header(struct wt_status *s)
 {
 	const char *c = color(WT_STATUS_HEADER, s);
 
@@ -207,9 +207,9 @@ static void wt_status_print_cached_header(struct wt_status *s)
 	status_printf_ln(s, c, "%s", "");
 }
 
-static void wt_status_print_dirty_header(struct wt_status *s,
-					 int has_deleted,
-					 int has_dirty_submodules)
+static void wt_longstatus_print_dirty_header(struct wt_status *s,
+					     int has_deleted,
+					     int has_dirty_submodules)
 {
 	const char *c = color(WT_STATUS_HEADER, s);
 
@@ -226,9 +226,9 @@ static void wt_status_print_dirty_header(struct wt_status *s,
 	status_printf_ln(s, c, "%s", "");
 }
 
-static void wt_status_print_other_header(struct wt_status *s,
-					 const char *what,
-					 const char *how)
+static void wt_longstatus_print_other_header(struct wt_status *s,
+					     const char *what,
+					     const char *how)
 {
 	const char *c = color(WT_STATUS_HEADER, s);
 	status_printf_ln(s, c, "%s:", what);
@@ -238,7 +238,7 @@ static void wt_status_print_other_header(struct wt_status *s,
 	status_printf_ln(s, c, "%s", "");
 }
 
-static void wt_status_print_trailer(struct wt_status *s)
+static void wt_longstatus_print_trailer(struct wt_status *s)
 {
 	status_printf_ln(s, color(WT_STATUS_HEADER, s), "%s", "");
 }
@@ -304,8 +304,8 @@ static int maxwidth(const char *(*label)(int), int minval, int maxval)
 	return result;
 }
 
-static void wt_status_print_unmerged_data(struct wt_status *s,
-					  struct string_list_item *it)
+static void wt_longstatus_print_unmerged_data(struct wt_status *s,
+					      struct string_list_item *it)
 {
 	const char *c = color(WT_STATUS_UNMERGED, s);
 	struct wt_status_change_data *d = it->util;
@@ -331,9 +331,9 @@ static void wt_status_print_unmerged_data(struct wt_status *s,
 	strbuf_release(&onebuf);
 }
 
-static void wt_status_print_change_data(struct wt_status *s,
-					int change_type,
-					struct string_list_item *it)
+static void wt_longstatus_print_change_data(struct wt_status *s,
+					    int change_type,
+					    struct string_list_item *it)
 {
 	struct wt_status_change_data *d = it->util;
 	const char *c = color(change_type, s);
@@ -378,7 +378,7 @@ static void wt_status_print_change_data(struct wt_status *s,
 		status = d->worktree_status;
 		break;
 	default:
-		die("BUG: unhandled change_type %d in wt_status_print_change_data",
+		die("BUG: unhandled change_type %d in wt_longstatus_print_change_data",
 		    change_type);
 	}
 
@@ -627,7 +627,7 @@ void wt_status_collect(struct wt_status *s)
 	wt_status_collect_untracked(s);
 }
 
-static void wt_status_print_unmerged(struct wt_status *s)
+static void wt_longstatus_print_unmerged(struct wt_status *s)
 {
 	int shown_header = 0;
 	int i;
@@ -640,17 +640,17 @@ static void wt_status_print_unmerged(struct wt_status *s)
 		if (!d->stagemask)
 			continue;
 		if (!shown_header) {
-			wt_status_print_unmerged_header(s);
+			wt_longstatus_print_unmerged_header(s);
 			shown_header = 1;
 		}
-		wt_status_print_unmerged_data(s, it);
+		wt_longstatus_print_unmerged_data(s, it);
 	}
 	if (shown_header)
-		wt_status_print_trailer(s);
+		wt_longstatus_print_trailer(s);
 
 }
 
-static void wt_status_print_updated(struct wt_status *s)
+static void wt_longstatus_print_updated(struct wt_status *s)
 {
 	int shown_header = 0;
 	int i;
@@ -664,14 +664,14 @@ static void wt_status_print_updated(struct wt_status *s)
 		    d->index_status == DIFF_STATUS_UNMERGED)
 			continue;
 		if (!shown_header) {
-			wt_status_print_cached_header(s);
+			wt_longstatus_print_cached_header(s);
 			s->commitable = 1;
 			shown_header = 1;
 		}
-		wt_status_print_change_data(s, WT_STATUS_UPDATED, it);
+		wt_longstatus_print_change_data(s, WT_STATUS_UPDATED, it);
 	}
 	if (shown_header)
-		wt_status_print_trailer(s);
+		wt_longstatus_print_trailer(s);
 }
 
 /*
@@ -703,7 +703,7 @@ static int wt_status_check_worktree_changes(struct wt_status *s,
 	return changes;
 }
 
-static void wt_status_print_changed(struct wt_status *s)
+static void wt_longstatus_print_changed(struct wt_status *s)
 {
 	int i, dirty_submodules;
 	int worktree_changes = wt_status_check_worktree_changes(s, &dirty_submodules);
@@ -711,7 +711,7 @@ static void wt_status_print_changed(struct wt_status *s)
 	if (!worktree_changes)
 		return;
 
-	wt_status_print_dirty_header(s, worktree_changes < 0, dirty_submodules);
+	wt_longstatus_print_dirty_header(s, worktree_changes < 0, dirty_submodules);
 
 	for (i = 0; i < s->change.nr; i++) {
 		struct wt_status_change_data *d;
@@ -721,12 +721,12 @@ static void wt_status_print_changed(struct wt_status *s)
 		if (!d->worktree_status ||
 		    d->worktree_status == DIFF_STATUS_UNMERGED)
 			continue;
-		wt_status_print_change_data(s, WT_STATUS_CHANGED, it);
+		wt_longstatus_print_change_data(s, WT_STATUS_CHANGED, it);
 	}
-	wt_status_print_trailer(s);
+	wt_longstatus_print_trailer(s);
 }
 
-static void wt_status_print_submodule_summary(struct wt_status *s, int uncommitted)
+static void wt_longstatus_print_submodule_summary(struct wt_status *s, int uncommitted)
 {
 	struct child_process sm_summary = CHILD_PROCESS_INIT;
 	struct strbuf cmd_stdout = STRBUF_INIT;
@@ -772,10 +772,10 @@ static void wt_status_print_submodule_summary(struct wt_status *s, int uncommitt
 	strbuf_release(&summary);
 }
 
-static void wt_status_print_other(struct wt_status *s,
-				  struct string_list *l,
-				  const char *what,
-				  const char *how)
+static void wt_longstatus_print_other(struct wt_status *s,
+				      struct string_list *l,
+				      const char *what,
+				      const char *how)
 {
 	int i;
 	struct strbuf buf = STRBUF_INIT;
@@ -785,7 +785,7 @@ static void wt_status_print_other(struct wt_status *s,
 	if (!l->nr)
 		return;
 
-	wt_status_print_other_header(s, what, how);
+	wt_longstatus_print_other_header(s, what, how);
 
 	for (i = 0; i < l->nr; i++) {
 		struct string_list_item *it;
@@ -845,7 +845,7 @@ void wt_status_add_cut_line(FILE *fp)
 	strbuf_release(&buf);
 }
 
-static void wt_status_print_verbose(struct wt_status *s)
+static void wt_longstatus_print_verbose(struct wt_status *s)
 {
 	struct rev_info rev;
 	struct setup_revision_opt opt;
@@ -878,7 +878,7 @@ static void wt_status_print_verbose(struct wt_status *s)
 	if (s->verbose > 1 && s->commitable) {
 		/* print_updated() printed a header, so do we */
 		if (s->fp != stdout)
-			wt_status_print_trailer(s);
+			wt_longstatus_print_trailer(s);
 		status_printf_ln(s, c, _("Changes to be committed:"));
 		rev.diffopt.a_prefix = "c/";
 		rev.diffopt.b_prefix = "i/";
@@ -896,7 +896,7 @@ static void wt_status_print_verbose(struct wt_status *s)
 	}
 }
 
-static void wt_status_print_tracking(struct wt_status *s)
+static void wt_longstatus_print_tracking(struct wt_status *s)
 {
 	struct strbuf sb = STRBUF_INIT;
 	const char *cp, *ep, *branch_name;
@@ -959,7 +959,7 @@ static void show_merge_in_progress(struct wt_status *s,
 			status_printf_ln(s, color,
 				_("  (use \"git commit\" to conclude merge)"));
 	}
-	wt_status_print_trailer(s);
+	wt_longstatus_print_trailer(s);
 }
 
 static void show_am_in_progress(struct wt_status *s,
@@ -980,7 +980,7 @@ static void show_am_in_progress(struct wt_status *s,
 		status_printf_ln(s, color,
 			_("  (use \"git am --abort\" to restore the original branch)"));
 	}
-	wt_status_print_trailer(s);
+	wt_longstatus_print_trailer(s);
 }
 
 static char *read_line_from_git_path(const char *filename)
@@ -1204,7 +1204,7 @@ static void show_rebase_in_progress(struct wt_status *s,
 				_("  (use \"git rebase --continue\" once you are satisfied with your changes)"));
 		}
 	}
-	wt_status_print_trailer(s);
+	wt_longstatus_print_trailer(s);
 }
 
 static void show_cherry_pick_in_progress(struct wt_status *s,
@@ -1223,7 +1223,7 @@ static void show_cherry_pick_in_progress(struct wt_status *s,
 		status_printf_ln(s, color,
 			_("  (use \"git cherry-pick --abort\" to cancel the cherry-pick operation)"));
 	}
-	wt_status_print_trailer(s);
+	wt_longstatus_print_trailer(s);
 }
 
 static void show_revert_in_progress(struct wt_status *s,
@@ -1242,7 +1242,7 @@ static void show_revert_in_progress(struct wt_status *s,
 		status_printf_ln(s, color,
 			_("  (use \"git revert --abort\" to cancel the revert operation)"));
 	}
-	wt_status_print_trailer(s);
+	wt_longstatus_print_trailer(s);
 }
 
 static void show_bisect_in_progress(struct wt_status *s,
@@ -1259,7 +1259,7 @@ static void show_bisect_in_progress(struct wt_status *s,
 	if (s->hints)
 		status_printf_ln(s, color,
 			_("  (use \"git bisect reset\" to get back to the original branch)"));
-	wt_status_print_trailer(s);
+	wt_longstatus_print_trailer(s);
 }
 
 /*
@@ -1429,8 +1429,8 @@ void wt_status_get_state(struct wt_status_state *state,
 		wt_status_get_detached_from(state);
 }
 
-static void wt_status_print_state(struct wt_status *s,
-				  struct wt_status_state *state)
+static void wt_longstatus_print_state(struct wt_status *s,
+				      struct wt_status_state *state)
 {
 	const char *state_color = color(WT_STATUS_HEADER, s);
 	if (state->merge_in_progress)
@@ -1447,7 +1447,7 @@ static void wt_status_print_state(struct wt_status *s,
 		show_bisect_in_progress(s, state, state_color);
 }
 
-void wt_status_print(struct wt_status *s)
+void wt_longstatus_print(struct wt_status *s)
 {
 	const char *branch_color = color(WT_STATUS_ONBRANCH, s);
 	const char *branch_status_color = color(WT_STATUS_HEADER, s);
@@ -1484,10 +1484,10 @@ void wt_status_print(struct wt_status *s)
 		status_printf_more(s, branch_status_color, "%s", on_what);
 		status_printf_more(s, branch_color, "%s\n", branch_name);
 		if (!s->is_initial)
-			wt_status_print_tracking(s);
+			wt_longstatus_print_tracking(s);
 	}
 
-	wt_status_print_state(s, &state);
+	wt_longstatus_print_state(s, &state);
 	free(state.branch);
 	free(state.onto);
 	free(state.detached_from);
@@ -1498,19 +1498,19 @@ void wt_status_print(struct wt_status *s)
 		status_printf_ln(s, color(WT_STATUS_HEADER, s), "%s", "");
 	}
 
-	wt_status_print_updated(s);
-	wt_status_print_unmerged(s);
-	wt_status_print_changed(s);
+	wt_longstatus_print_updated(s);
+	wt_longstatus_print_unmerged(s);
+	wt_longstatus_print_changed(s);
 	if (s->submodule_summary &&
 	    (!s->ignore_submodule_arg ||
 	     strcmp(s->ignore_submodule_arg, "all"))) {
-		wt_status_print_submodule_summary(s, 0);  /* staged */
-		wt_status_print_submodule_summary(s, 1);  /* unstaged */
+		wt_longstatus_print_submodule_summary(s, 0);  /* staged */
+		wt_longstatus_print_submodule_summary(s, 1);  /* unstaged */
 	}
 	if (s->show_untracked_files) {
-		wt_status_print_other(s, &s->untracked, _("Untracked files"), "add");
+		wt_longstatus_print_other(s, &s->untracked, _("Untracked files"), "add");
 		if (s->show_ignored_files)
-			wt_status_print_other(s, &s->ignored, _("Ignored files"), "add -f");
+			wt_longstatus_print_other(s, &s->ignored, _("Ignored files"), "add -f");
 		if (advice_status_u_option && 2000 < s->untracked_in_ms) {
 			status_printf_ln(s, GIT_COLOR_NORMAL, "%s", "");
 			status_printf_ln(s, GIT_COLOR_NORMAL,
@@ -1525,7 +1525,7 @@ void wt_status_print(struct wt_status *s)
 			? _(" (use -u option to show untracked files)") : "");
 
 	if (s->verbose)
-		wt_status_print_verbose(s);
+		wt_longstatus_print_verbose(s);
 	if (!s->commitable) {
 		if (s->amend)
 			status_printf_ln(s, GIT_COLOR_NORMAL, _("No changes"));
diff --git a/wt-status.h b/wt-status.h
index 2ca93f6..2023a3c 100644
--- a/wt-status.h
+++ b/wt-status.h
@@ -99,7 +99,6 @@ struct wt_status_state {
 void wt_status_truncate_message_at_cut_line(struct strbuf *);
 void wt_status_add_cut_line(FILE *fp);
 void wt_status_prepare(struct wt_status *s);
-void wt_status_print(struct wt_status *s);
 void wt_status_collect(struct wt_status *s);
 void wt_status_get_state(struct wt_status_state *state, int get_detached_from);
 int wt_status_check_rebase(const struct worktree *wt,
@@ -107,6 +106,7 @@ int wt_status_check_rebase(const struct worktree *wt,
 int wt_status_check_bisect(const struct worktree *wt,
 			   struct wt_status_state *state);
 
+void wt_longstatus_print(struct wt_status *s);
 void wt_shortstatus_print(struct wt_status *s);
 void wt_porcelain_print(struct wt_status *s);
 
-- 
2.8.0.rc4.17.gac42084.dirty

[PATCH v3 2/8] status: cleanup API to wt_status_print

[Jeff Hostetler]

From: Jeff Hostetler <jeffhost@microsoft.com>

Refactor the API between builtin/commit.c and wt-status.[ch].
Hide details of the various wt_*status_print() routines inside
wt-status.c behind a single (new) wt_status_print() routine
and eliminate the switch statements from builtin/commit.c

This will allow us to more easily add new status formats
and isolate that within wt-status.c

Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Jeff Hostetler <git@jeffhostetler.com>
---
 builtin/commit.c | 51 +++++++++------------------------------------------
 wt-status.c      | 25 ++++++++++++++++++++++---
 wt-status.h      | 16 ++++++++++++----
 3 files changed, 43 insertions(+), 49 deletions(-)

diff --git a/builtin/commit.c b/builtin/commit.c
index b80273b..a792deb 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -142,14 +142,7 @@ static int show_ignored_in_status, have_option_m;
 static const char *only_include_assumed;
 static struct strbuf message = STRBUF_INIT;
 
-static enum status_format {
-	STATUS_FORMAT_NONE = 0,
-	STATUS_FORMAT_LONG,
-	STATUS_FORMAT_SHORT,
-	STATUS_FORMAT_PORCELAIN,
-
-	STATUS_FORMAT_UNSPECIFIED
-} status_format = STATUS_FORMAT_UNSPECIFIED;
+static enum wt_status_format status_format = STATUS_FORMAT_UNSPECIFIED;
 
 static int opt_parse_m(const struct option *opt, const char *arg, int unset)
 {
@@ -500,24 +493,11 @@ static int run_status(FILE *fp, const char *index_file, const char *prefix, int
 	s->fp = fp;
 	s->nowarn = nowarn;
 	s->is_initial = get_sha1(s->reference, sha1) ? 1 : 0;
+	s->status_format = status_format;
+	s->ignore_submodule_arg = ignore_submodule_arg;
 
 	wt_status_collect(s);
-
-	switch (status_format) {
-	case STATUS_FORMAT_SHORT:
-		wt_shortstatus_print(s);
-		break;
-	case STATUS_FORMAT_PORCELAIN:
-		wt_porcelain_print(s);
-		break;
-	case STATUS_FORMAT_UNSPECIFIED:
-		die("BUG: finalize_deferred_config() should have been called");
-		break;
-	case STATUS_FORMAT_NONE:
-	case STATUS_FORMAT_LONG:
-		wt_longstatus_print(s);
-		break;
-	}
+	wt_status_print(s);
 
 	return s->commitable;
 }
@@ -1099,7 +1079,7 @@ static const char *read_commit_message(const char *name)
  * is not in effect here.
  */
 static struct status_deferred_config {
-	enum status_format status_format;
+	enum wt_status_format status_format;
 	int show_branch;
 } status_deferred_config = {
 	STATUS_FORMAT_UNSPECIFIED,
@@ -1381,6 +1361,9 @@ int cmd_status(int argc, const char **argv, const char *prefix)
 
 	s.is_initial = get_sha1(s.reference, sha1) ? 1 : 0;
 	s.ignore_submodule_arg = ignore_submodule_arg;
+	s.status_format = status_format;
+	s.verbose = verbose;
+
 	wt_status_collect(&s);
 
 	if (0 <= fd)
@@ -1389,23 +1372,7 @@ int cmd_status(int argc, const char **argv, const char *prefix)
 	if (s.relative_paths)
 		s.prefix = prefix;
 
-	switch (status_format) {
-	case STATUS_FORMAT_SHORT:
-		wt_shortstatus_print(&s);
-		break;
-	case STATUS_FORMAT_PORCELAIN:
-		wt_porcelain_print(&s);
-		break;
-	case STATUS_FORMAT_UNSPECIFIED:
-		die("BUG: finalize_deferred_config() should have been called");
-		break;
-	case STATUS_FORMAT_NONE:
-	case STATUS_FORMAT_LONG:
-		s.verbose = verbose;
-		s.ignore_submodule_arg = ignore_submodule_arg;
-		wt_longstatus_print(&s);
-		break;
-	}
+	wt_status_print(&s);
 	return 0;
 }
 
diff --git a/wt-status.c b/wt-status.c
index b9a58fd..a9031e4 100644
--- a/wt-status.c
+++ b/wt-status.c
@@ -1447,7 +1447,7 @@ static void wt_longstatus_print_state(struct wt_status *s,
 		show_bisect_in_progress(s, state, state_color);
 }
 
-void wt_longstatus_print(struct wt_status *s)
+static void wt_longstatus_print(struct wt_status *s)
 {
 	const char *branch_color = color(WT_STATUS_ONBRANCH, s);
 	const char *branch_status_color = color(WT_STATUS_HEADER, s);
@@ -1714,7 +1714,7 @@ static void wt_shortstatus_print_tracking(struct wt_status *s)
 	fputc(s->null_termination ? '\0' : '\n', s->fp);
 }
 
-void wt_shortstatus_print(struct wt_status *s)
+static void wt_shortstatus_print(struct wt_status *s)
 {
 	int i;
 
@@ -1746,7 +1746,7 @@ void wt_shortstatus_print(struct wt_status *s)
 	}
 }
 
-void wt_porcelain_print(struct wt_status *s)
+static void wt_porcelain_print(struct wt_status *s)
 {
 	s->use_color = 0;
 	s->relative_paths = 0;
@@ -1754,3 +1754,22 @@ void wt_porcelain_print(struct wt_status *s)
 	s->no_gettext = 1;
 	wt_shortstatus_print(s);
 }
+
+void wt_status_print(struct wt_status *s)
+{
+	switch (s->status_format) {
+	case STATUS_FORMAT_SHORT:
+		wt_shortstatus_print(s);
+		break;
+	case STATUS_FORMAT_PORCELAIN:
+		wt_porcelain_print(s);
+		break;
+	case STATUS_FORMAT_UNSPECIFIED:
+		die("BUG: finalize_deferred_config() should have been called");
+		break;
+	case STATUS_FORMAT_NONE:
+	case STATUS_FORMAT_LONG:
+		wt_longstatus_print(s);
+		break;
+	}
+}
diff --git a/wt-status.h b/wt-status.h
index 2023a3c..a859a12 100644
--- a/wt-status.h
+++ b/wt-status.h
@@ -43,6 +43,15 @@ struct wt_status_change_data {
 	unsigned new_submodule_commits : 1;
 };
 
+ enum wt_status_format {
+	STATUS_FORMAT_NONE = 0,
+	STATUS_FORMAT_LONG,
+	STATUS_FORMAT_SHORT,
+	STATUS_FORMAT_PORCELAIN,
+
+	STATUS_FORMAT_UNSPECIFIED
+ };
+
 struct wt_status {
 	int is_initial;
 	char *branch;
@@ -66,6 +75,8 @@ struct wt_status {
 	int show_branch;
 	int hints;
 
+	enum wt_status_format status_format;
+
 	/* These are computed during processing of the individual sections */
 	int commitable;
 	int workdir_dirty;
@@ -99,6 +110,7 @@ struct wt_status_state {
 void wt_status_truncate_message_at_cut_line(struct strbuf *);
 void wt_status_add_cut_line(FILE *fp);
 void wt_status_prepare(struct wt_status *s);
+void wt_status_print(struct wt_status *s);
 void wt_status_collect(struct wt_status *s);
 void wt_status_get_state(struct wt_status_state *state, int get_detached_from);
 int wt_status_check_rebase(const struct worktree *wt,
@@ -106,10 +118,6 @@ int wt_status_check_rebase(const struct worktree *wt,
 int wt_status_check_bisect(const struct worktree *wt,
 			   struct wt_status_state *state);
 
-void wt_longstatus_print(struct wt_status *s);
-void wt_shortstatus_print(struct wt_status *s);
-void wt_porcelain_print(struct wt_status *s);
-
 __attribute__((format (printf, 3, 4)))
 void status_printf_ln(struct wt_status *s, const char *color, const char *fmt, ...);
 __attribute__((format (printf, 3, 4)))
-- 
2.8.0.rc4.17.gac42084.dirty

[PATCH v3 3/8] status: support --porcelain[=<version>]

[Jeff Hostetler]

From: Jeff Hostetler <jeffhost@microsoft.com>

Update --porcelain argument to take optional version parameter
to allow multiple porcelain formats to be supported in the future.

The token "v1" is the default value and indicates the traditional
porcelain format.  (The token "1" is an alias for that.)

Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Jeff Hostetler <git@jeffhostetler.com>
---
 Documentation/git-status.txt |  7 +++++--
 builtin/commit.c             | 21 ++++++++++++++++++---
 t/t7060-wtstatus.sh          | 21 +++++++++++++++++++++
 3 files changed, 44 insertions(+), 5 deletions(-)

diff --git a/Documentation/git-status.txt b/Documentation/git-status.txt
index e1e8f57..6b1454b 100644
--- a/Documentation/git-status.txt
+++ b/Documentation/git-status.txt
@@ -32,11 +32,14 @@ OPTIONS
 --branch::
 	Show the branch and tracking info even in short-format.
 
---porcelain::
+--porcelain[=<version>]::
 	Give the output in an easy-to-parse format for scripts.
 	This is similar to the short output, but will remain stable
 	across Git versions and regardless of user configuration. See
 	below for details.
++
+The version parameter is used to specify the format version.
+This is optional and defaults to the original version 'v1' format.
 
 --long::
 	Give the output in the long-format. This is the default.
@@ -96,7 +99,7 @@ configuration variable documented in linkgit:git-config[1].
 
 -z::
 	Terminate entries with NUL, instead of LF.  This implies
-	the `--porcelain` output format if no other format is given.
+	the `--porcelain=v1` output format if no other format is given.
 
 --column[=<options>]::
 --no-column::
diff --git a/builtin/commit.c b/builtin/commit.c
index a792deb..c3ae2c3 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -144,6 +144,21 @@ static struct strbuf message = STRBUF_INIT;
 
 static enum wt_status_format status_format = STATUS_FORMAT_UNSPECIFIED;
 
+static int opt_parse_porcelain(const struct option *opt, const char *arg, int unset)
+{
+	enum wt_status_format *value = (enum wt_status_format *)opt->value;
+	if (unset)
+		*value = STATUS_FORMAT_NONE;
+	else if (!arg)
+		*value = STATUS_FORMAT_PORCELAIN;
+	else if (!strcmp(arg, "v1") || !strcmp(arg,"1"))
+		*value = STATUS_FORMAT_PORCELAIN;
+	else
+		die("unsupported porcelain version '%s'", arg);
+
+	return 0;
+}
+
 static int opt_parse_m(const struct option *opt, const char *arg, int unset)
 {
 	struct strbuf *buf = opt->value;
@@ -1316,9 +1331,9 @@ int cmd_status(int argc, const char **argv, const char *prefix)
 			    N_("show status concisely"), STATUS_FORMAT_SHORT),
 		OPT_BOOL('b', "branch", &s.show_branch,
 			 N_("show branch information")),
-		OPT_SET_INT(0, "porcelain", &status_format,
-			    N_("machine-readable output"),
-			    STATUS_FORMAT_PORCELAIN),
+		{ OPTION_CALLBACK, 0, "porcelain", &status_format,
+		  N_("version"), N_("machine-readable output"),
+		  PARSE_OPT_OPTARG, opt_parse_porcelain },
 		OPT_SET_INT(0, "long", &status_format,
 			    N_("show status in long format (default)"),
 			    STATUS_FORMAT_LONG),
diff --git a/t/t7060-wtstatus.sh b/t/t7060-wtstatus.sh
index 44bf1d8..00e0ceb 100755
--- a/t/t7060-wtstatus.sh
+++ b/t/t7060-wtstatus.sh
@@ -228,4 +228,25 @@ test_expect_success 'status --branch with detached HEAD' '
 	test_i18ncmp expected actual
 '
 
+## Duplicate the above test and verify --porcelain=v1 arg parsing.
+test_expect_success 'status --porcelain=v1 --branch with detached HEAD' '
+	git reset --hard &&
+	git checkout master^0 &&
+	git status --branch --porcelain=v1 >actual &&
+	cat >expected <<-EOF &&
+	## HEAD (no branch)
+	?? .gitconfig
+	?? actual
+	?? expect
+	?? expected
+	?? mdconflict/
+	EOF
+	test_i18ncmp expected actual
+'
+
+## Verify parser error on invalid --porcelain argument.
+test_expect_success 'status --porcelain=bogus' '
+	test_must_fail git status --porcelain=bogus
+'
+
 test_done
-- 
2.8.0.rc4.17.gac42084.dirty

[PATCH v3 4/8] status: per-file data collection for --porcelain=v2

[Jeff Hostetler]

From: Jeff Hostetler <jeffhost@microsoft.com>

The output of `git status --porcelain` leaves out many details
about the current status that clients might like to have.  This
can force them to be less efficient as they may need to launch
secondary commands (and try to match the logic within git) to
accumulate this extra information.  For example, a GUI IDE might
want the file mode to display the correct icon for a changed
item (without having to stat it afterwards).

Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Jeff Hostetler <git@jeffhostetler.com>
---
 builtin/commit.c |  3 +++
 wt-status.c      | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 wt-status.h      |  4 ++++
 3 files changed, 69 insertions(+), 1 deletion(-)

diff --git a/builtin/commit.c b/builtin/commit.c
index c3ae2c3..93ce28c 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -153,6 +153,8 @@ static int opt_parse_porcelain(const struct option *opt, const char *arg, int un
 		*value = STATUS_FORMAT_PORCELAIN;
 	else if (!strcmp(arg, "v1") || !strcmp(arg,"1"))
 		*value = STATUS_FORMAT_PORCELAIN;
+	else if (!strcmp(arg, "v2") || !strcmp(arg, "2"))
+		*value = STATUS_FORMAT_PORCELAIN_V2;
 	else
 		die("unsupported porcelain version '%s'", arg);
 
@@ -1104,6 +1106,7 @@ static struct status_deferred_config {
 static void finalize_deferred_config(struct wt_status *s)
 {
 	int use_deferred_config = (status_format != STATUS_FORMAT_PORCELAIN &&
+				   status_format != STATUS_FORMAT_PORCELAIN_V2 &&
 				   !s->null_termination);
 
 	if (s->null_termination) {
diff --git a/wt-status.c b/wt-status.c
index a9031e4..15d3349 100644
--- a/wt-status.c
+++ b/wt-status.c
@@ -434,6 +434,31 @@ static void wt_status_collect_changed_cb(struct diff_queue_struct *q,
 		if (S_ISGITLINK(p->two->mode))
 			d->new_submodule_commits = !!oidcmp(&p->one->oid,
 							    &p->two->oid);
+
+		switch (p->status) {
+		case DIFF_STATUS_ADDED:
+			die("BUG: worktree status add???");
+			break;
+
+		case DIFF_STATUS_DELETED:
+			d->mode_index = p->one->mode;
+			oidcpy(&d->oid_index, &p->one->oid);
+			/* mode_worktree is zero for a delete. */
+			break;
+
+		case DIFF_STATUS_MODIFIED:
+		case DIFF_STATUS_TYPE_CHANGED:
+		case DIFF_STATUS_UNMERGED:
+			d->mode_index = p->one->mode;
+			d->mode_worktree = p->two->mode;
+			oidcpy(&d->oid_index, &p->one->oid);
+			break;
+
+		case DIFF_STATUS_UNKNOWN:
+			die("BUG: worktree status unknown???");
+			break;
+		}
+
 	}
 }
 
@@ -479,12 +504,36 @@ static void wt_status_collect_updated_cb(struct diff_queue_struct *q,
 		if (!d->index_status)
 			d->index_status = p->status;
 		switch (p->status) {
+		case DIFF_STATUS_ADDED:
+			/* Leave {mode,oid}_head zero for an add. */
+			d->mode_index = p->two->mode;
+			oidcpy(&d->oid_index, &p->two->oid);
+			break;
+		case DIFF_STATUS_DELETED:
+			d->mode_head = p->one->mode;
+			oidcpy(&d->oid_head, &p->one->oid);
+			/* Leave {mode,oid}_index zero for a delete. */
+			break;
+			
 		case DIFF_STATUS_COPIED:
 		case DIFF_STATUS_RENAMED:
 			d->head_path = xstrdup(p->one->path);
+			d->score = p->score * 100 / MAX_SCORE;
+			/* fallthru */
+		case DIFF_STATUS_MODIFIED:
+		case DIFF_STATUS_TYPE_CHANGED:
+			d->mode_head = p->one->mode;
+			d->mode_index = p->two->mode;
+			oidcpy(&d->oid_head, &p->one->oid);
+			oidcpy(&d->oid_index, &p->two->oid);
 			break;
 		case DIFF_STATUS_UNMERGED:
 			d->stagemask = unmerged_mask(p->two->path);
+			/*
+			 * Don't bother setting {mode,oid}_{head,index} since the print
+			 * code will output the stage values directly and not use the
+			 * values in these fields.
+			 */
 			break;
 		}
 	}
@@ -565,9 +614,18 @@ static void wt_status_collect_changes_initial(struct wt_status *s)
 		if (ce_stage(ce)) {
 			d->index_status = DIFF_STATUS_UNMERGED;
 			d->stagemask |= (1 << (ce_stage(ce) - 1));
+			/*
+			 * Don't bother setting {mode,oid}_{head,index} since the print
+			 * code will output the stage values directly and not use the
+			 * values in these fields.
+			 */
 		}
-		else
+		else {
 			d->index_status = DIFF_STATUS_ADDED;
+			/* Leave {mode,oid}_head zero for adds. */
+			d->mode_index = ce->ce_mode;
+			hashcpy(d->oid_index.hash, ce->sha1);
+		}
 	}
 }
 
@@ -1764,6 +1822,9 @@ void wt_status_print(struct wt_status *s)
 	case STATUS_FORMAT_PORCELAIN:
 		wt_porcelain_print(s);
 		break;
+	case STATUS_FORMAT_PORCELAIN_V2:
+		/* TODO */
+		break;
 	case STATUS_FORMAT_UNSPECIFIED:
 		die("BUG: finalize_deferred_config() should have been called");
 		break;
diff --git a/wt-status.h b/wt-status.h
index a859a12..89a6d43 100644
--- a/wt-status.h
+++ b/wt-status.h
@@ -38,6 +38,9 @@ struct wt_status_change_data {
 	int worktree_status;
 	int index_status;
 	int stagemask;
+	int score;
+	int mode_head, mode_index, mode_worktree;
+	struct object_id oid_head, oid_index;
 	char *head_path;
 	unsigned dirty_submodule       : 2;
 	unsigned new_submodule_commits : 1;
@@ -48,6 +51,7 @@ struct wt_status_change_data {
 	STATUS_FORMAT_LONG,
 	STATUS_FORMAT_SHORT,
 	STATUS_FORMAT_PORCELAIN,
+	STATUS_FORMAT_PORCELAIN_V2,
 
 	STATUS_FORMAT_UNSPECIFIED
  };
-- 
2.8.0.rc4.17.gac42084.dirty

[PATCH v3 5/8] status: print per-file porcelain v2 status data

[Jeff Hostetler]

From: Jeff Hostetler <jeffhost@microsoft.com>

Print per-file information in porcelain v2 format.

Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Jeff Hostetler <git@jeffhostetler.com>
---
 wt-status.c | 283 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 282 insertions(+), 1 deletion(-)

diff --git a/wt-status.c b/wt-status.c
index 15d3349..46061d4 100644
--- a/wt-status.c
+++ b/wt-status.c
@@ -1813,6 +1813,287 @@ static void wt_porcelain_print(struct wt_status *s)
 	wt_shortstatus_print(s);
 }
 
+/*
+ * Convert various submodule status values into a
+ * fixed-length string of characters in the buffer provided.
+ */
+static void wt_porcelain_v2_submodule_state(
+	struct wt_status_change_data *d,
+	char sub[5])
+{
+	if (S_ISGITLINK(d->mode_head) ||
+		S_ISGITLINK(d->mode_index) ||
+		S_ISGITLINK(d->mode_worktree)) {
+		sub[0] = 'S';
+		sub[1] = d->new_submodule_commits ? 'C' : '.';
+		sub[2] = (d->dirty_submodule & DIRTY_SUBMODULE_MODIFIED) ? 'M' : '.';
+		sub[3] = (d->dirty_submodule & DIRTY_SUBMODULE_UNTRACKED) ? 'U' : '.';
+	} else {
+		sub[0] = 'N';
+		sub[1] = '.';
+		sub[2] = '.';
+		sub[3] = '.';
+	}
+	sub[4] = 0;
+}
+
+/*
+ * Fix-up changed entries before we print them.
+ */
+static void wt_porcelain_v2_fix_up_changed(
+	struct string_list_item *it,
+	struct wt_status *s)
+{
+	struct wt_status_change_data *d = it->util;
+
+	if (!d->index_status) {
+		/*
+		 * This entry is unchanged in the index (relative to the head).
+		 * Therefore, the collect_updated_cb was never called for this
+		 * entry (during the head-vs-index scan) and so the head column
+		 * fields were never set.
+		 *
+		 * We must have data for the index column (from the
+		 * index-vs-worktree scan (otherwise, this entry should not be
+		 * in the list of changes)).
+		 *
+		 * Copy index column fields to the head column, so that our
+		 * output looks complete.
+		 */
+		assert(d->mode_head == 0);
+		d->mode_head = d->mode_index;
+		oidcpy(&d->oid_head, &d->oid_index);
+	}
+
+	if (!d->worktree_status) {
+		/*
+		 * This entry is unchanged in the worktree (relative to the index).
+		 * Therefore, the collect_changed_cb was never called for this entry
+		 * (during the index-vs-worktree scan) and so the worktree column
+		 * fields were never set.
+		 *
+		 * We must have data for the index column (from the head-vs-index
+		 * scan).
+		 *
+		 * Copy the index column fields to the worktree column so that
+		 * our output looks complete.
+		 *
+		 * Note that we only have a mode field in the worktree column
+		 * because the scan code tries really hard to not have to compute it.
+		 */
+		assert(d->mode_worktree == 0);
+		d->mode_worktree = d->mode_index;
+	}
+}
+
+/*
+ * Print porcelain v2 info for tracked entries with changes.
+ */
+static void wt_porcelain_v2_print_changed_entry(
+	struct string_list_item *it,
+	struct wt_status *s)
+{
+	struct wt_status_change_data *d = it->util;
+	struct strbuf buf_current = STRBUF_INIT;
+	struct strbuf buf_src = STRBUF_INIT;
+	const char *path_current = NULL;
+	const char *path_src = NULL;
+	char key[3];
+	char submodule_token[5];
+	char sep_char, eol_char;
+
+	wt_porcelain_v2_fix_up_changed(it, s);
+	wt_porcelain_v2_submodule_state(d, submodule_token);
+
+	key[0] = d->index_status ? d->index_status : '.';
+	key[1] = d->worktree_status ? d->worktree_status : '.';
+	key[2] = 0;
+
+	if (s->null_termination) {
+		/*
+		 * In -z mode, we DO NOT C-Quote pathnames.  Current path is ALWAYS first.
+		 * A single NUL character separates them.
+		 */
+		sep_char = '\0';
+		eol_char = '\0';
+		path_current = it->string;
+		path_src = d->head_path;
+	} else {
+		/*
+		 * Path(s) are C-Quoted if necessary. Current path is ALWAYS first.
+		 * The source path is only present when necessary.
+		 * A single TAB separates them (because paths can contain spaces
+		 * which are not escaped and C-Quoting does escape TAB characters).
+		 */
+		sep_char = '\t';
+		eol_char = '\n';
+		path_current = quote_path(it->string, s->prefix, &buf_current);
+		if (d->head_path)
+			path_src = quote_path(d->head_path, s->prefix, &buf_src);
+	}
+
+	if (path_src)
+		fprintf(s->fp, "2 %s %s %06o %06o %06o %s %s %c%d %s%c%s%c",
+				key, submodule_token,
+				d->mode_head, d->mode_index, d->mode_worktree,
+				oid_to_hex(&d->oid_head), oid_to_hex(&d->oid_index),
+				key[0], d->score,
+				path_current, sep_char, path_src, eol_char);
+	else
+		fprintf(s->fp, "1 %s %s %06o %06o %06o %s %s %s%c",
+				key, submodule_token,
+				d->mode_head, d->mode_index, d->mode_worktree,
+				oid_to_hex(&d->oid_head), oid_to_hex(&d->oid_index),
+				path_current, eol_char);
+	
+	strbuf_release(&buf_current);
+	strbuf_release(&buf_src);
+}
+
+/*
+ * Print porcelain v2 status info for unmerged entries.
+ */
+static void wt_porcelain_v2_print_unmerged_entry(
+	struct string_list_item *it,
+	struct wt_status *s)
+{
+	struct wt_status_change_data *d = it->util;
+	const struct cache_entry *ce;
+	struct strbuf buf_current = STRBUF_INIT;
+	const char *path_current = NULL;
+	int pos, stage, sum;
+	struct {
+		int mode;
+		struct object_id oid;
+	} stages[3];
+	char *key;
+	char submodule_token[5];
+	char unmerged_prefix = 'u';
+	char eol_char = s->null_termination ? '\0' : '\n';
+
+	wt_porcelain_v2_submodule_state(d, submodule_token);
+
+	switch (d->stagemask) {
+	case 1: key = "DD"; break; /* both deleted */
+	case 2: key = "AU"; break; /* added by us */
+	case 3: key = "UD"; break; /* deleted by them */
+	case 4: key = "UA"; break; /* added by them */
+	case 5: key = "DU"; break; /* deleted by us */
+	case 6: key = "AA"; break; /* both added */
+	case 7: key = "UU"; break; /* both modified */
+	}
+
+	/*
+	 * Disregard d.aux.porcelain_v2 data that we accumulated
+	 * for the head and index columns during the scans and
+	 * replace with the actual stage data.
+	 *
+	 * Note that this is a last-one-wins for each the individual
+	 * stage [123] columns in the event of multiple cache entries
+	 * for same stage.
+	 */
+	memset(stages, 0, sizeof(stages));
+	sum = 0;
+	pos = cache_name_pos(it->string, strlen(it->string));
+	assert(pos < 0);
+	pos = -pos-1;
+	while (pos < active_nr) {
+		ce = active_cache[pos++];
+		stage = ce_stage(ce);
+		if (strcmp(ce->name, it->string) || !stage)
+			break;
+		stages[stage - 1].mode = ce->ce_mode;
+		hashcpy(stages[stage - 1].oid.hash, ce->sha1);
+		sum |= (1 << (stage - 1));
+	}
+	if (sum != d->stagemask)
+		die("BUG: observed stagemask 0x%x != expected stagemask 0x%x", sum, d->stagemask);
+
+	if (s->null_termination)
+		path_current = it->string;
+	else
+		path_current = quote_path(it->string, s->prefix, &buf_current);
+
+	fprintf(s->fp, "%c %s %s %06o %06o %06o %06o %s %s %s %s%c",
+			unmerged_prefix, key, submodule_token,
+			stages[0].mode, /* stage 1 */
+			stages[1].mode, /* stage 2 */
+			stages[2].mode, /* stage 3 */
+			d->mode_worktree,
+			oid_to_hex(&stages[0].oid), /* stage 1 */
+			oid_to_hex(&stages[1].oid), /* stage 2 */
+			oid_to_hex(&stages[2].oid), /* stage 3 */
+			path_current,
+			eol_char);
+
+	strbuf_release(&buf_current);
+}
+
+/*
+ * Print porcelain V2 status info for untracked and ignored entries.
+ */
+static void wt_porcelain_v2_print_other(
+	struct string_list_item *it,
+	struct wt_status *s,
+	char prefix)
+{
+	struct strbuf buf = STRBUF_INIT;
+	const char *path;
+	char eol_char;
+
+	if (s->null_termination) {
+		path = it->string;
+		eol_char = '\0';
+	} else {
+		path = quote_path(it->string, s->prefix, &buf);
+		eol_char = '\n';
+	}
+
+	fprintf(s->fp, "%c %s%c", prefix, path, eol_char);
+
+	strbuf_release(&buf);
+}
+
+/*
+ * Print porcelain V2 status.
+ *
+ * [<v2_changed_items>]*
+ * [<v2_unmerged_items>]*
+ * [<v2_untracked_items>]*
+ * [<v2_ignored_items>]*
+ *
+ */
+void wt_porcelain_v2_print(struct wt_status *s)
+{
+	struct wt_status_change_data *d;
+	struct string_list_item *it;
+	int i;
+
+	for (i = 0; i < s->change.nr; i++) {
+		it = &(s->change.items[i]);
+		d = it->util;
+		if (!d->stagemask)
+			wt_porcelain_v2_print_changed_entry(it, s);
+	}
+
+	for (i = 0; i < s->change.nr; i++) {
+		it = &(s->change.items[i]);
+		d = it->util;
+		if (d->stagemask)
+			wt_porcelain_v2_print_unmerged_entry(it, s);
+	}
+
+	for (i = 0; i < s->untracked.nr; i++) {
+		it = &(s->untracked.items[i]);
+		wt_porcelain_v2_print_other(it, s, '?');
+	}
+
+	for (i = 0; i < s->ignored.nr; i++) {
+		it = &(s->ignored.items[i]);
+		wt_porcelain_v2_print_other(it, s, '!');
+	}
+}
+
 void wt_status_print(struct wt_status *s)
 {
 	switch (s->status_format) {
@@ -1823,7 +2104,7 @@ void wt_status_print(struct wt_status *s)
 		wt_porcelain_print(s);
 		break;
 	case STATUS_FORMAT_PORCELAIN_V2:
-		/* TODO */
+		wt_porcelain_v2_print(s);
 		break;
 	case STATUS_FORMAT_UNSPECIFIED:
 		die("BUG: finalize_deferred_config() should have been called");
-- 
2.8.0.rc4.17.gac42084.dirty

[PATCH v3 6/8] status: print branch info with --porcelain=v2 --branch

[Jeff Hostetler]

From: Jeff Hostetler <jeffhost@microsoft.com>

Expand porcelain v2 output to include branch and tracking
branch information.  This includes the commit SHA, the branch,
the upstream branch, and the ahead and behind counts.

Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Jeff Hostetler <git@jeffhostetler.com>
---
 builtin/commit.c |  5 ++++
 wt-status.c      | 90 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 wt-status.h      |  1 +
 3 files changed, 96 insertions(+)

diff --git a/builtin/commit.c b/builtin/commit.c
index 93ce28c..b1fd2d1 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -510,6 +510,8 @@ static int run_status(FILE *fp, const char *index_file, const char *prefix, int
 	s->fp = fp;
 	s->nowarn = nowarn;
 	s->is_initial = get_sha1(s->reference, sha1) ? 1 : 0;
+	if (!s->is_initial)
+		hashcpy(s->sha1_commit, sha1);
 	s->status_format = status_format;
 	s->ignore_submodule_arg = ignore_submodule_arg;
 
@@ -1378,6 +1380,9 @@ int cmd_status(int argc, const char **argv, const char *prefix)
 	fd = hold_locked_index(&index_lock, 0);
 
 	s.is_initial = get_sha1(s.reference, sha1) ? 1 : 0;
+	if (!s.is_initial)
+		hashcpy(s.sha1_commit, sha1);
+
 	s.ignore_submodule_arg = ignore_submodule_arg;
 	s.status_format = status_format;
 	s.verbose = verbose;
diff --git a/wt-status.c b/wt-status.c
index 46061d4..592fbd2 100644
--- a/wt-status.c
+++ b/wt-status.c
@@ -1814,6 +1814,92 @@ static void wt_porcelain_print(struct wt_status *s)
 }
 
 /*
+ * Print branch information for porcelain v2 output.  These lines
+ * are printed when the '--branch' parameter is given.
+ *
+ *    # branch.oid <commit><eol>
+ *    # branch.head <head><eol>
+ *   [# branch.upstream <upstream><eol>
+ *   [# branch.ab +<ahead> -<behind><eol>]]
+ *
+ *      <commit> ::= the current commit hash or the the literal
+ *                   "(initial)" to indicate an initialized repo
+ *                   with no commits.
+ *
+ *        <head> ::= <branch_name> the current branch name or
+ *                   "(detached)" literal when detached head or
+ *                   "(unknown)" when something is wrong.
+ *
+ *    <upstream> ::= the upstream branch name, when set.
+ *
+ *       <ahead> ::= integer ahead value, when upstream set
+ *                   and the commit is present (not gone).
+ *
+ *      <behind> ::= integer behind value, when upstream set
+ *                   and commit is present.
+ *
+ *
+ * The end-of-line is defined by the -z flag.
+ *
+ *                 <eol> ::= NUL when -z,
+ *                           LF when NOT -z.
+ *
+ */
+static void wt_porcelain_v2_print_tracking(struct wt_status *s)
+{
+	struct branch *branch;
+	const char *base;
+	const char *branch_name;
+	struct wt_status_state state;
+	int ab_info, nr_ahead, nr_behind;
+	char eol = s->null_termination ? '\0' : '\n';
+
+	memset(&state, 0, sizeof(state));
+	wt_status_get_state(&state, s->branch && !strcmp(s->branch, "HEAD"));
+
+	fprintf(s->fp, "# branch.oid %s%c",
+			(s->is_initial ? "(initial)" : sha1_to_hex(s->sha1_commit)),
+			eol);
+
+	if (!s->branch)
+		fprintf(s->fp, "# branch.head %s%c", "(unknown)", eol);
+	else {
+		if (!strcmp(s->branch, "HEAD")) {
+			fprintf(s->fp, "# branch.head %s%c", "(detached)", eol);
+
+			if (state.rebase_in_progress || state.rebase_interactive_in_progress)
+				branch_name = state.onto;
+			else if (state.detached_from)
+				branch_name = state.detached_from;
+			else
+				branch_name = "";
+		} else {
+			branch_name = NULL;
+			skip_prefix(s->branch, "refs/heads/", &branch_name);
+
+			fprintf(s->fp, "# branch.head %s%c", branch_name, eol);
+		}
+
+		/* Lookup stats on the upstream tracking branch, if set. */
+		branch = branch_get(branch_name);
+		base = NULL;
+		ab_info = (stat_tracking_info(branch, &nr_ahead, &nr_behind, &base) == 0);
+		if (base) {
+			base = shorten_unambiguous_ref(base, 0);
+			fprintf(s->fp, "# branch.upstream %s%c", base, eol);
+			free((char *)base);
+
+			if (ab_info)
+				fprintf(s->fp, "# branch.ab +%d -%d%c", nr_ahead, nr_behind, eol);
+		}
+	}
+
+	free(state.branch);
+	free(state.onto);
+	free(state.detached_from);
+}
+
+/*
  * Convert various submodule status values into a
  * fixed-length string of characters in the buffer provided.
  */
@@ -2057,6 +2143,7 @@ static void wt_porcelain_v2_print_other(
 /*
  * Print porcelain V2 status.
  *
+ * [<v2_branch>]
  * [<v2_changed_items>]*
  * [<v2_unmerged_items>]*
  * [<v2_untracked_items>]*
@@ -2069,6 +2156,9 @@ void wt_porcelain_v2_print(struct wt_status *s)
 	struct string_list_item *it;
 	int i;
 
+	if (s->show_branch)
+		wt_porcelain_v2_print_tracking(s);
+
 	for (i = 0; i < s->change.nr; i++) {
 		it = &(s->change.items[i]);
 		d = it->util;
diff --git a/wt-status.h b/wt-status.h
index 89a6d43..baedfe3 100644
--- a/wt-status.h
+++ b/wt-status.h
@@ -80,6 +80,7 @@ struct wt_status {
 	int hints;
 
 	enum wt_status_format status_format;
+	unsigned char sha1_commit[GIT_SHA1_RAWSZ]; /* when not Initial */
 
 	/* These are computed during processing of the individual sections */
 	int commitable;
-- 
2.8.0.rc4.17.gac42084.dirty

[PATCH v3 7/8] status: update git-status.txt for --porcelain=v2

[Jeff Hostetler]

From: Jeff Hostetler <jeffhost@microsoft.com>

Update status manpage to include information about
porcelain v2 format.

Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Jeff Hostetler <git@jeffhostetler.com>
---
 Documentation/git-status.txt | 93 ++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 90 insertions(+), 3 deletions(-)

diff --git a/Documentation/git-status.txt b/Documentation/git-status.txt
index 6b1454b..ed3590d 100644
--- a/Documentation/git-status.txt
+++ b/Documentation/git-status.txt
@@ -185,10 +185,10 @@ If -b is used the short-format status is preceded by a line
 
 ## branchname tracking info
 
-Porcelain Format
-~~~~~~~~~~~~~~~~
+Porcelain Format Version 1
+~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-The porcelain format is similar to the short format, but is guaranteed
+Version 1 porcelain format is similar to the short format, but is guaranteed
 not to change in a backwards-incompatible way between Git versions or
 based on user configuration. This makes it ideal for parsing by scripts.
 The description of the short format above also describes the porcelain
@@ -210,6 +210,93 @@ field from the first filename).  Third, filenames containing special
 characters are not specially formatted; no quoting or
 backslash-escaping is performed.
 
+Porcelain Format Version 2
+~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Version 2 format adds more detailed information about the state of
+the worktree and changed items.
+
+If `--branch` is given, a series of header lines are printed with
+information about the current branch.
+
+    Line                                 Notes
+    --------------------------------------------------------
+    # branch.oid <commit> | (initial)    Current commit
+    # branch.head <branch> | (detached)  Current branch
+    # branch.upstream <upstream_branch>  If set
+    # branch.ab +<ahead> -<behind>       If set and present
+    --------------------------------------------------------
+
+A series of lines are then displayed for the tracked entries.
+Ordinary changed entries have the following format:
+
+    1 <XY> <sub> <mH> <mI> <mW> <hH> <hI> <path>
+
+Renamed or copied entries have the following format:
+
+    2 <XY> <sub> <mH> <mI> <mW> <hH> <hI> <X><nr> <path>\t<pathSrc>
+
+    Field       Meaning
+    --------------------------------------------------------
+    <XY>        A 2 character field containing the staged and
+                unstaged XY values described in the short format,
+                with unchanged indicated by a "." rather than
+                a space.
+    <sub>       A 4 character field describing the submodule state.
+                "N..." when the entry is not a submodule.
+                "S<c><m><u>" when the entry is a submodule.
+                <c> is "C" if the commit changed; otherwise ".".
+                <m> is "M" if it has tracked changes; otherwise ".".
+                <u> is "U" if there are untracked changes; otherwise ".".
+    <mH>        The 6 character octal file mode in the HEAD.
+    <mI>        The octal file mode in the index.
+    <mW>        The octal file mode in the worktree.
+    <hH>        The SHA1 value in the HEAD.
+    <hI>        The SHA1 value in the index.
+    <X><nr>     The rename or copied percentage score. For example "R100"
+                or "C75".
+    <path>      The current pathname.
+    <pathSrc>   The original path. This is only present when the entry
+                has been renamed or copied.
+    --------------------------------------------------------
+
+Unmerged entries have the following format; the first character is
+a "u" to distinguish from ordinary changed entries.
+
+    u <xy> <sub> <m1> <m2> <m3> <mW> <h1> <h2> <h3> <path>
+
+    Field       Meaning
+    --------------------------------------------------------
+    <XY>        A 2 character field describing the conflict type
+                as described in the short format.
+    <sub>       A 4 character field describing the submodule state
+                as described above.
+    <m1>        The octal file mode for stage 1.
+    <m2>        The octal file mode for stage 2.
+    <m3>        The octal file mode for stage 3.
+    <mW>        The octal file mode in the worktree.
+    <h1>        The SHA1 value for stage 1.
+    <h2>        The SHA1 value for stage 2.
+    <h3>        The SHA1 value for stage 3.
+    <path>      The current pathname.
+    --------------------------------------------------------
+
+A series of lines are then displayed for untracked and ignored entries.
+
+    <x> <path>
+
+Where <x> is "?" for untracked entries and "!" for ignored entries.
+
+In all 3 line formats, pathnames will be "C Quoted" if they contain
+any of the following characters: TAB, LF, double quotes, or backslashes.
+These characters will be replaced with \t, \n, \", and \\, respectively,
+and the pathname will be enclosed in double quotes.
+
+When the `-z` option is given, a NUL (zero) byte follows each pathname;
+serving as both a separator and line termination. No pathname quoting
+or backslash escaping is performed. All fields are output in the same
+order.
+
 CONFIGURATION
 -------------
 
-- 
2.8.0.rc4.17.gac42084.dirty

[PATCH v3 8/8] status: tests for --porcelain=v2

[Jeff Hostetler]

From: Jeff Hostetler <jeffhost@microsoft.com>

Unit tests for porcelain v2 status format.

Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Jeff Hostetler <git@jeffhostetler.com>
---
 t/t7064-wtstatus-pv2.sh | 585 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 585 insertions(+)
 create mode 100755 t/t7064-wtstatus-pv2.sh

diff --git a/t/t7064-wtstatus-pv2.sh b/t/t7064-wtstatus-pv2.sh
new file mode 100755
index 0000000..ff0dd3d
--- /dev/null
+++ b/t/t7064-wtstatus-pv2.sh
@@ -0,0 +1,585 @@
+#!/bin/sh
+
+test_description='git status --porcelain=v2
+
+This test exercises porcelain V2 output for git status.'
+
+
+. ./test-lib.sh
+
+test_expect_success setup '
+	test_tick &&
+	git config --local core.autocrlf false &&
+	echo x >file_x &&
+	echo y >file_y &&
+	echo z >file_z &&
+	mkdir dir1 &&
+	echo a >dir1/file_a &&
+	echo b >dir1/file_b
+'
+
+
+##################################################################
+## Confirm output prior to initial commit.
+##################################################################
+
+test_expect_success pre_initial_commit_0 '
+	cat >expected <<-EOF &&
+	# branch.oid (initial)
+	# branch.head master
+	? actual
+	? dir1/
+	? expected
+	? file_x
+	? file_y
+	? file_z
+	EOF
+
+	git status --porcelain=v2 --branch --ignored --untracked-files=normal >actual &&
+	test_cmp expected actual
+'
+
+
+test_expect_success pre_initial_commit_1 '
+	git add file_x file_y file_z dir1 &&
+	SHA_A=`git hash-object -t blob -- dir1/file_a` &&
+	SHA_B=`git hash-object -t blob -- dir1/file_b` &&
+	SHA_X=`git hash-object -t blob -- file_x` &&
+	SHA_Y=`git hash-object -t blob -- file_y` &&
+	SHA_Z=`git hash-object -t blob -- file_z` &&
+	SHA_ZERO=0000000000000000000000000000000000000000 &&
+
+	cat >expected <<-EOF &&
+	# branch.oid (initial)
+	# branch.head master
+	1 A. N... 000000 100644 100644 $SHA_ZERO $SHA_A dir1/file_a
+	1 A. N... 000000 100644 100644 $SHA_ZERO $SHA_B dir1/file_b
+	1 A. N... 000000 100644 100644 $SHA_ZERO $SHA_X file_x
+	1 A. N... 000000 100644 100644 $SHA_ZERO $SHA_Y file_y
+	1 A. N... 000000 100644 100644 $SHA_ZERO $SHA_Z file_z
+	? actual
+	? expected
+	EOF
+
+	git status --porcelain=v2 --branch --ignored --untracked-files=all >actual &&
+	test_cmp expected actual
+'
+
+## Try -z on the above
+test_expect_success pre_initial_commit_2 '
+	cat >expected.lf <<-EOF &&
+	# branch.oid (initial)
+	# branch.head master
+	1 A. N... 000000 100644 100644 $SHA_ZERO $SHA_A dir1/file_a
+	1 A. N... 000000 100644 100644 $SHA_ZERO $SHA_B dir1/file_b
+	1 A. N... 000000 100644 100644 $SHA_ZERO $SHA_X file_x
+	1 A. N... 000000 100644 100644 $SHA_ZERO $SHA_Y file_y
+	1 A. N... 000000 100644 100644 $SHA_ZERO $SHA_Z file_z
+	? actual
+	? expected
+	EOF
+	perl -pe y/\\012/\\000/ <expected.lf >expected &&
+	rm expected.lf &&
+
+	git status -z --porcelain=v2 --branch --ignored --untracked-files=all >actual &&
+	test_cmp expected actual
+'
+
+##################################################################
+## Create first commit. Confirm commit sha in new track header.
+## Then make some changes on top of it.
+##################################################################
+
+test_expect_success initial_commit_0 '
+	git commit -m initial &&
+	H0=`git rev-parse HEAD` &&
+	cat >expected <<-EOF &&
+	# branch.oid $H0
+	# branch.head master
+	? actual
+	? expected
+	EOF
+
+	git status --porcelain=v2 --branch --ignored --untracked-files=all >actual &&
+	test_cmp expected actual
+'
+
+
+test_expect_success initial_commit_1 '
+	echo x >>file_x &&
+	SHA_X1=`git hash-object -t blob -- file_x` &&
+	rm file_z &&
+	H0=`git rev-parse HEAD` &&
+
+	cat >expected <<-EOF &&
+	# branch.oid $H0
+	# branch.head master
+	1 .M N... 100644 100644 100644 $SHA_X $SHA_X file_x
+	1 .D N... 100644 100644 000000 $SHA_Z $SHA_Z file_z
+	? actual
+	? expected
+	EOF
+
+	git status --porcelain=v2 --branch --ignored --untracked-files=all >actual &&
+	test_cmp expected actual
+'
+
+
+test_expect_success initial_commit_2 '
+	git add file_x &&
+	git rm file_z &&
+	H0=`git rev-parse HEAD` &&
+
+	cat >expected <<-EOF &&
+	# branch.oid $H0
+	# branch.head master
+	1 M. N... 100644 100644 100644 $SHA_X $SHA_X1 file_x
+	1 D. N... 100644 000000 000000 $SHA_Z $SHA_ZERO file_z
+	? actual
+	? expected
+	EOF
+
+	git status --porcelain=v2 --branch --ignored --untracked-files=all >actual &&
+	test_cmp expected actual
+'
+
+
+test_expect_success initial_commit_3 '
+	git mv file_y renamed_y &&
+	H0=`git rev-parse HEAD` &&
+
+	cat >expected.q <<-EOF &&
+	# branch.oid $H0
+	# branch.head master
+	1 M. N... 100644 100644 100644 $SHA_X $SHA_X1 file_x
+	1 D. N... 100644 000000 000000 $SHA_Z $SHA_ZERO file_z
+	2 R. N... 100644 100644 100644 $SHA_Y $SHA_Y R100 renamed_yQfile_y
+	? actual
+	? expected
+	EOF
+	q_to_tab <expected.q >expected &&
+	rm expected.q &&
+
+	git status --porcelain=v2 --branch --ignored --untracked-files=all >actual &&
+	test_cmp expected actual
+'
+
+
+##################################################################
+## Create second commit.
+##################################################################
+
+test_expect_success second_commit_0 '
+	git commit -m second &&
+	H1=`git rev-parse HEAD` &&
+
+	cat >expected <<-EOF &&
+	# branch.oid $H1
+	# branch.head master
+	? actual
+	? expected
+	EOF
+
+	git status --porcelain=v2 --branch --ignored --untracked-files=all >actual &&
+	test_cmp expected actual
+'
+
+
+##################################################################
+## Ignore a file
+##################################################################
+
+test_expect_success ignore_file_0 '
+	echo x.ign >.gitignore &&
+	echo "ignore me" >x.ign &&
+	H1=`git rev-parse HEAD` &&
+
+	cat >expected <<-EOF &&
+	# branch.oid $H1
+	# branch.head master
+	? .gitignore
+	? actual
+	? expected
+	! x.ign
+	EOF
+
+	git status --porcelain=v2 --branch --ignored --untracked-files=all >actual &&
+	rm x.ign &&
+	rm .gitignore &&
+	test_cmp expected actual
+'
+
+
+##################################################################
+## Create some conflicts.
+##################################################################
+
+test_expect_success conflict_AA '
+	git branch AA_A master &&
+	git checkout AA_A &&
+	echo "Branch AA_A" >conflict.txt &&
+	SHA_AA_A=`git hash-object -t blob -- conflict.txt` &&
+	git add conflict.txt &&
+	git commit -m "branch aa_a" &&
+
+	git branch AA_B master &&
+	git checkout AA_B &&
+	echo "Branch AA_B" >conflict.txt &&
+	SHA_AA_B=`git hash-object -t blob -- conflict.txt` &&
+	git add conflict.txt &&
+	git commit -m "branch aa_b" &&
+
+	git branch AA_M AA_B &&
+	git checkout AA_M &&
+	test_must_fail git merge AA_A &&
+
+	HM=`git rev-parse HEAD` &&
+
+	cat >expected <<-EOF &&
+	# branch.oid $HM
+	# branch.head AA_M
+	u AA N... 000000 100644 100644 100644 $SHA_ZERO $SHA_AA_B $SHA_AA_A conflict.txt
+	? actual
+	? expected
+	EOF
+
+	git status --porcelain=v2 --branch --ignored --untracked-files=all >actual &&
+	git reset --hard &&
+	test_cmp expected actual
+'
+
+
+test_expect_success conflict_UU '
+	git branch UU_ANC master &&
+	git checkout UU_ANC &&
+	echo "Ancestor" >conflict.txt &&
+	SHA_UU_ANC=`git hash-object -t blob -- conflict.txt` &&
+	git add conflict.txt &&
+	git commit -m "UU_ANC" &&
+
+	git branch UU_A UU_ANC &&
+	git checkout UU_A &&
+	echo "Branch UU_A" >conflict.txt &&
+	SHA_UU_A=`git hash-object -t blob -- conflict.txt` &&
+	git add conflict.txt &&
+	git commit -m "branch uu_a" &&
+
+	git branch UU_B UU_ANC &&
+	git checkout UU_B &&
+	echo "Branch UU_B" >conflict.txt &&
+	SHA_UU_B=`git hash-object -t blob -- conflict.txt` &&
+	git add conflict.txt &&
+	git commit -m "branch uu_b" &&
+
+	git branch UU_M UU_B &&
+	git checkout UU_M &&
+	test_must_fail git merge UU_A &&
+
+	HM=`git rev-parse HEAD` &&
+
+	cat >expected <<-EOF &&
+	# branch.oid $HM
+	# branch.head UU_M
+	u UU N... 100644 100644 100644 100644 $SHA_UU_ANC $SHA_UU_B $SHA_UU_A conflict.txt
+	? actual
+	? expected
+	EOF
+
+	git status --porcelain=v2 --branch --ignored --untracked-files=all >actual &&
+	git reset --hard &&
+	test_cmp expected actual
+'
+
+
+##################################################################
+## Test upstream fields in branch header
+##################################################################
+
+test_expect_success 'upstream_fields_0' '
+	git checkout master &&
+	git clone . sub_repo &&
+	(
+		## Confirm local master tracks remote master.
+		cd sub_repo &&
+		HUF=`git rev-parse HEAD` &&
+
+		cat >expected <<-EOF &&
+		# branch.oid $HUF
+		# branch.head master
+		# branch.upstream origin/master
+		# branch.ab +0 -0
+		? actual
+		? expected
+		EOF
+
+		git status --porcelain=v2 --branch --ignored --untracked-files=all >actual &&
+		test_cmp expected actual &&
+
+		## Test ahead/behind.
+		echo xyz >file_xyz &&
+		git add file_xyz &&
+		git commit -m xyz &&
+
+		HUF=`git rev-parse HEAD` &&
+
+		cat >expected <<-EOF &&
+		# branch.oid $HUF
+		# branch.head master
+		# branch.upstream origin/master
+		# branch.ab +1 -0
+		? actual
+		? expected
+		EOF
+
+		git status --porcelain=v2 --branch --ignored --untracked-files=all >actual &&
+		test_cmp expected actual &&
+
+		## Test upstream-gone case. Fake this by pointing origin/master at
+		## a non-existing commit.
+		OLD=`git rev-parse origin/master` &&
+		NEW=$SHA_ZERO &&
+		mv .git/packed-refs .git/old-packed-refs &&
+		sed "s/$OLD/$NEW/g" <.git/old-packed-refs >.git/packed-refs &&
+
+		HUF=`git rev-parse HEAD` &&
+
+		cat >expected <<-EOF &&
+		# branch.oid $HUF
+		# branch.head master
+		# branch.upstream origin/master
+		? actual
+		? expected
+		EOF
+
+		git status --porcelain=v2 --branch --ignored --untracked-files=all >actual &&
+		test_cmp expected actual
+	) &&
+	rm -rf sub_repo
+'
+
+
+##################################################################
+## Test submodule status flags.
+##################################################################
+
+test_expect_success 'submodule_flags_0' '
+	git checkout master &&
+	git clone . sub_repo &&
+	git clone . super_repo &&
+	(	cd super_repo &&
+		git submodule add ../sub_repo sub1 &&
+
+		## Confirm stage/add of clean submodule.
+		HMOD=`git hash-object -t blob -- .gitmodules` &&
+		HSUP=`git rev-parse HEAD` &&
+		HSUB=$HSUP &&
+
+		cat >expected <<-EOF &&
+		# branch.oid $HSUP
+		# branch.head master
+		# branch.upstream origin/master
+		# branch.ab +0 -0
+		1 A. N... 000000 100644 100644 $SHA_ZERO $HMOD .gitmodules
+		1 A. S... 000000 160000 160000 $SHA_ZERO $HSUB sub1
+		? actual
+		? expected
+		EOF
+
+		git status --porcelain=v2 --branch --ignored --untracked-files=all >actual &&
+		test_cmp expected actual
+	)
+'
+
+test_expect_success 'submodule_flags_1' '
+	(	cd super_repo &&
+		## Make some untracked dirt in the submodule.
+		(	cd sub1 &&
+			echo "dirt" >file_in_sub
+		) &&
+
+		HMOD=`git hash-object -t blob -- .gitmodules` &&
+		HSUP=`git rev-parse HEAD` &&
+		HSUB=$HSUP &&
+
+		cat >expected <<-EOF &&
+		# branch.oid $HSUP
+		# branch.head master
+		# branch.upstream origin/master
+		# branch.ab +0 -0
+		1 A. N... 000000 100644 100644 $SHA_ZERO $HMOD .gitmodules
+		1 AM S..U 000000 160000 160000 $SHA_ZERO $HSUB sub1
+		? actual
+		? expected
+		EOF
+
+		git status --porcelain=v2 --branch --ignored --untracked-files=all >actual &&
+		test_cmp expected actual
+	)
+'
+
+test_expect_success 'submodule_flags_2' '
+	(	cd super_repo &&
+		## Make some staged dirt in the submodule.
+		(	cd sub1 &&
+			git add file_in_sub
+		) &&
+
+		HMOD=`git hash-object -t blob -- .gitmodules` &&
+		HSUP=`git rev-parse HEAD` &&
+		HSUB=$HSUP &&
+
+		cat >expected <<-EOF &&
+		# branch.oid $HSUP
+		# branch.head master
+		# branch.upstream origin/master
+		# branch.ab +0 -0
+		1 A. N... 000000 100644 100644 $SHA_ZERO $HMOD .gitmodules
+		1 AM S.M. 000000 160000 160000 $SHA_ZERO $HSUB sub1
+		? actual
+		? expected
+		EOF
+
+		git status --porcelain=v2 --branch --ignored --untracked-files=all >actual &&
+		test_cmp expected actual
+	)
+'
+
+test_expect_success 'submodule_flags_3' '
+	(	cd super_repo &&
+		## Make some staged and unstaged dirt (on the same file) in the submodule.
+		## This does not cause us to get S.MU (because the submodule does not report
+		## a "?" line for the unstaged changes).
+		(	cd sub1 &&
+			echo "more dirt" >>file_in_sub
+		) &&
+
+		HMOD=`git hash-object -t blob -- .gitmodules` &&
+		HSUP=`git rev-parse HEAD` &&
+		HSUB=$HSUP &&
+
+		cat >expected <<-EOF &&
+		# branch.oid $HSUP
+		# branch.head master
+		# branch.upstream origin/master
+		# branch.ab +0 -0
+		1 A. N... 000000 100644 100644 $SHA_ZERO $HMOD .gitmodules
+		1 AM S.M. 000000 160000 160000 $SHA_ZERO $HSUB sub1
+		? actual
+		? expected
+		EOF
+
+		git status --porcelain=v2 --branch --ignored --untracked-files=all >actual &&
+		test_cmp expected actual
+	)
+'
+
+test_expect_success 'submodule_flags_4' '
+	(	cd super_repo &&
+		## Make some staged and untracked dirt (on different files) in the submodule.
+		(	cd sub1 &&
+			git add file_in_sub &&
+			echo "dirt" >>another_file_in_sub
+		) &&
+
+		HMOD=`git hash-object -t blob -- .gitmodules` &&
+		HSUP=`git rev-parse HEAD` &&
+		HSUB=$HSUP &&
+
+		cat >expected <<-EOF &&
+		# branch.oid $HSUP
+		# branch.head master
+		# branch.upstream origin/master
+		# branch.ab +0 -0
+		1 A. N... 000000 100644 100644 $SHA_ZERO $HMOD .gitmodules
+		1 AM S.MU 000000 160000 160000 $SHA_ZERO $HSUB sub1
+		? actual
+		? expected
+		EOF
+
+		git status --porcelain=v2 --branch --ignored --untracked-files=all >actual &&
+		test_cmp expected actual
+	)
+'
+
+test_expect_success 'submodule_flags_5' '
+	(	cd super_repo &&
+		## Make a new commit in the submodule.
+		(	cd sub1 &&
+			git add file_in_sub &&
+			rm -f another_file_in_sub &&
+			git commit -m "new commit"
+		) &&
+
+		HMOD=`git hash-object -t blob -- .gitmodules` &&
+		HSUP=`git rev-parse HEAD` &&
+		HSUB=$HSUP &&
+
+		cat >expected <<-EOF &&
+		# branch.oid $HSUP
+		# branch.head master
+		# branch.upstream origin/master
+		# branch.ab +0 -0
+		1 A. N... 000000 100644 100644 $SHA_ZERO $HMOD .gitmodules
+		1 AM SC.. 000000 160000 160000 $SHA_ZERO $HSUB sub1
+		? actual
+		? expected
+		EOF
+
+		git status --porcelain=v2 --branch --ignored --untracked-files=all >actual &&
+		test_cmp expected actual
+	)
+'
+
+test_expect_success 'submodule_flags_6' '
+	(	cd super_repo &&
+		## Commit the new submodule commit in the super.
+		git add sub1 &&
+		git commit -m "super commit" &&
+
+		HSUP=`git rev-parse HEAD` &&
+
+		cat >expected <<-EOF &&
+		# branch.oid $HSUP
+		# branch.head master
+		# branch.upstream origin/master
+		# branch.ab +1 -0
+		? actual
+		? expected
+		EOF
+
+		git status --porcelain=v2 --branch --ignored --untracked-files=all >actual &&
+		test_cmp expected actual
+	)
+'
+
+test_expect_success 'submodule_flags_7' '
+	(	cd super_repo &&
+		## Make some untracked dirt in the submodule.
+		(	cd sub1 &&
+			echo "yet more dirt" >>file_in_sub
+		) &&
+
+		HMOD=`git hash-object -t blob -- .gitmodules` &&
+		HSUP=`git rev-parse HEAD` &&
+		HSUB=`(cd sub1 && git rev-parse HEAD)` &&
+
+		cat >expected <<-EOF &&
+		# branch.oid $HSUP
+		# branch.head master
+		# branch.upstream origin/master
+		# branch.ab +1 -0
+		1 .M S.M. 160000 160000 160000 $HSUB $HSUB sub1
+		? actual
+		? expected
+		EOF
+
+		git status --porcelain=v2 --branch --ignored --untracked-files=all >actual &&
+		test_cmp expected actual
+	)
+'
+
+##################################################################
+## The end.
+##################################################################
+
+test_done
-- 
2.8.0.rc4.17.gac42084.dirty

Re: [PATCH v3 7/8] status: update git-status.txt for --porcelain=v2

[Jakub Narębski]

W dniu 26.07.2016 o 23:11, Jeff Hostetler pisze:

> +Porcelain Format Version 2
> +~~~~~~~~~~~~~~~~~~~~~~~~~~
> +
> +Version 2 format adds more detailed information about the state of
> +the worktree and changed items.
> +
> +If `--branch` is given, a series of header lines are printed with
> +information about the current branch.
> +
> +    Line                                 Notes
> +    --------------------------------------------------------
> +    # branch.oid <commit> | (initial)    Current commit
> +    # branch.head <branch> | (detached)  Current branch
> +    # branch.upstream <upstream_branch>  If set
> +    # branch.ab +<ahead> -<behind>       If set and present

"If set and present" means "If upstream set and present", isn't it?
Well, it is a shortcut, and I think easy to understand.

> +    --------------------------------------------------------

This is a nice change, available because of lack of backward
compatibility with v1.  The porcelain v2 format branch-related
information could be enhanced without risk of breaking parsers,
or having new information put at the end even if it does not fit
there (like in previous iteration).

One thing that can serve as goal for the series is using the
question: would it make __git_ps1() from git-prompt.sh be able
to render fully decorated prompt with all bells and whistles,
and with all combinations of options.  Thus beside upstream
in the future we might want SVN upstream, and/or pushed-to
remote branch (and remote push upstream repository), etc.

But that's for the future (and it is possible for the future)...

> +
> +A series of lines are then displayed for the tracked entries.
> +Ordinary changed entries have the following format:
> +
> +    1 <XY> <sub> <mH> <mI> <mW> <hH> <hI> <path>
> +
> +Renamed or copied entries have the following format:
> +
> +    2 <XY> <sub> <mH> <mI> <mW> <hH> <hI> <X><nr> <path>\t<pathSrc>

Nice solution to avoid those all zeros / null-SHA1s

> +
> +    Field       Meaning
> +    --------------------------------------------------------
> +    <XY>        A 2 character field containing the staged and
> +                unstaged XY values described in the short format,
> +                with unchanged indicated by a "." rather than
> +                a space.
> +    <sub>       A 4 character field describing the submodule state.
> +                "N..." when the entry is not a submodule.
> +                "S<c><m><u>" when the entry is a submodule.
> +                <c> is "C" if the commit changed; otherwise ".".
> +                <m> is "M" if it has tracked changes; otherwise ".".
> +                <u> is "U" if there are untracked changes; otherwise ".".
> +    <mH>        The 6 character octal file mode in the HEAD.
> +    <mI>        The octal file mode in the index.
> +    <mW>        The octal file mode in the worktree.
> +    <hH>        The SHA1 value in the HEAD.
> +    <hI>        The SHA1 value in the index.
> +    <X><nr>     The rename or copied percentage score. For example "R100"
> +                or "C75".
> +    <path>      The current pathname.
> +    <pathSrc>   The original path. This is only present when the entry
> +                has been renamed or copied.
> +    --------------------------------------------------------
> +
> +Unmerged entries have the following format; the first character is
> +a "u" to distinguish from ordinary changed entries.
> +
> +    u <xy> <sub> <m1> <m2> <m3> <mW> <h1> <h2> <h3> <path>
> +
> +    Field       Meaning
> +    --------------------------------------------------------
> +    <XY>        A 2 character field describing the conflict type
> +                as described in the short format.
> +    <sub>       A 4 character field describing the submodule state
> +                as described above.
> +    <m1>        The octal file mode for stage 1.
> +    <m2>        The octal file mode for stage 2.
> +    <m3>        The octal file mode for stage 3.
> +    <mW>        The octal file mode in the worktree.
> +    <h1>        The SHA1 value for stage 1.
> +    <h2>        The SHA1 value for stage 2.
> +    <h3>        The SHA1 value for stage 3.
> +    <path>      The current pathname.
> +    --------------------------------------------------------

A question: do unmerged entries always have only one single filename?
Or unmerged entries are always only about CONFLICT(contents), and no
other?

Would a note (or a link to other documentation) about octopus merges
be out of place here?

> +
> +A series of lines are then displayed for untracked and ignored entries.
> +
> +    <x> <path>
> +
> +Where <x> is "?" for untracked entries and "!" for ignored entries.

A question: are they displayed in that order, i.e. first all untracked,
then all ignored, or it is something one cannot rely about?

> +
> +In all 3 line formats, pathnames will be "C Quoted" if they contain

"C Quoted" or "C-Quoted"?  How it is described in other places of
the Git documentation?

> +any of the following characters: TAB, LF, double quotes, or backslashes.
> +These characters will be replaced with \t, \n, \", and \\, respectively,
> +and the pathname will be enclosed in double quotes.
> +
> +When the `-z` option is given, a NUL (zero) byte follows each pathname;
> +serving as both a separator and line termination. No pathname quoting
> +or backslash escaping is performed. All fields are output in the same
> +order.

Does it mean that

    2 [...] <cq-path>\t<cq-pathSrc>\n

line (including line terminator) is replaced with

    2 [...] <path>\0<pathSrc>\0

that is, it replaces a separator (TAB, "\t") and line termination (LF, "\n");
here spelled in full?

BTW. do we have name for "C-Quoted" paths?

> +
>  CONFIGURATION
>  -------------
 

Re: [PATCH v3 7/8] status: update git-status.txt for --porcelain=v2

[Jeff Hostetler]

On 07/30/2016 01:22 PM, Jakub Narębski wrote:
> W dniu 26.07.2016 o 23:11, Jeff Hostetler pisze:
>
> This is a nice change, available because of lack of backward
> compatibility with v1.  The porcelain v2 format branch-related
> information could be enhanced without risk of breaking parsers,
> or having new information put at the end even if it does not fit
> there (like in previous iteration).
>
> One thing that can serve as goal for the series is using the
> question: would it make __git_ps1() from git-prompt.sh be able
> to render fully decorated prompt with all bells and whistles,
> and with all combinations of options.  Thus beside upstream
> in the future we might want SVN upstream, and/or pushed-to
> remote branch (and remote push upstream repository), etc.
>
> But that's for the future (and it is possible for the future)...
>

Yes, I was hoping to be able to simplify and/or speed up
__git_ps1() with this data.  "Namespacing" the branch data
here.  And then later add the state data (in a merge,
in a rebase, and etc.) in a series of "# state.*" headers.
And so on, until we get everything that __git_ps1() needs.
However, to really make that work, we might want to add
a --no-scan (or minimial scan) option, to just return the
header data, since __git_ps1() doesn't care about the list
of changes.


>> +
>> +A series of lines are then displayed for the tracked entries.
>> +Ordinary changed entries have the following format:
>> +
>> +    1 <XY> <sub> <mH> <mI> <mW> <hH> <hI> <path>
>> +
>> +Renamed or copied entries have the following format:
>> +
>> +    2 <XY> <sub> <mH> <mI> <mW> <hH> <hI> <X><nr> <path>\t<pathSrc>
>
> Nice solution to avoid those all zeros / null-SHA1s

Thanks.


>> +Unmerged entries have the following format; the first character is
>> +a "u" to distinguish from ordinary changed entries.
>> +
>> +    u <xy> <sub> <m1> <m2> <m3> <mW> <h1> <h2> <h3> <path>
>> +
>> +    Field       Meaning
>> +    --------------------------------------------------------
>> +    <XY>        A 2 character field describing the conflict type
>> +                as described in the short format.
>> +    <sub>       A 4 character field describing the submodule state
>> +                as described above.
>> +    <m1>        The octal file mode for stage 1.
>> +    <m2>        The octal file mode for stage 2.
>> +    <m3>        The octal file mode for stage 3.
>> +    <mW>        The octal file mode in the worktree.
>> +    <h1>        The SHA1 value for stage 1.
>> +    <h2>        The SHA1 value for stage 2.
>> +    <h3>        The SHA1 value for stage 3.
>> +    <path>      The current pathname.
>> +    --------------------------------------------------------
>
> A question: do unmerged entries always have only one single filename?
> Or unmerged entries are always only about CONFLICT(contents), and no
> other?

As far as I could tell, unmerged rename conflicts appear with a single
filename.

When I did a divergent rename (in both branches), merge creates
     a stage-1 "DD" entry,
     a stage-2 "AU" entry, and
     a stage-3 with a "UA" entry.
     Status reports it as 3 rows.

When I did a rename in one branch and an edits in both, merge
creates: either a "DU" or "UD" conflict (depending on the direction
of the merge).

Given that the index is ordered and accessed by path (and there is
no pathname field in a cache entry to link it to a different one),
I have to say that this is true.

>
> Would a note (or a link to other documentation) about octopus merges
> be out of place here?

I put a note in the code about it reporting the last entry at each
stage that are present in the index, but I'm not sure about how much
we want to say here.

If octopus finds conflicts, the worktree will probably be in a
funky state anyway.

>
>> +
>> +A series of lines are then displayed for untracked and ignored entries.
>> +
>> +    <x> <path>
>> +
>> +Where <x> is "?" for untracked entries and "!" for ignored entries.
>
> A question: are they displayed in that order, i.e. first all untracked,
> then all ignored, or it is something one cannot rely about?

With the unique prefix character it shouldn't matter.  I do print
all the '?' lines first then all the '!' lines, so the manpage
could be clarified if we wanted. I was just trying to save another
paragraph in the manpage.

>
>> +
>> +In all 3 line formats, pathnames will be "C Quoted" if they contain
>
> "C Quoted" or "C-Quoted"?  How it is described in other places of
> the Git documentation?
>

I was probably inconsistent, I think it should be "c-quoted" (with the
hypen) providing we like this term.

Each of the git-diff*.txt and diff-format.txt files talk about
this quoting scheme, but none give it an explicit name.


>> +any of the following characters: TAB, LF, double quotes, or backslashes.
>> +These characters will be replaced with \t, \n, \", and \\, respectively,
>> +and the pathname will be enclosed in double quotes.
>> +
>> +When the `-z` option is given, a NUL (zero) byte follows each pathname;
>> +serving as both a separator and line termination. No pathname quoting
>> +or backslash escaping is performed. All fields are output in the same
>> +order.
>
> Does it mean that
>
>      2 [...] <cq-path>\t<cq-pathSrc>\n
>
> line (including line terminator) is replaced with
>
>      2 [...] <path>\0<pathSrc>\0
>
> that is, it replaces a separator (TAB, "\t") and line termination (LF, "\n");
> here spelled in full?
>

Yes.  Let me try to clarify that in the manpage.

Thanks,
Jeff

Re: [PATCH v3 7/8] status: update git-status.txt for --porcelain=v2

[Jakub Narębski]

W dniu 01.08.2016 o 17:39, Jeff Hostetler pisze:
> On 07/30/2016 01:22 PM, Jakub Narębski wrote:
>> W dniu 26.07.2016 o 23:11, Jeff Hostetler pisze:
>>
>> This is a nice change, available because of lack of backward
>> compatibility with v1.  The porcelain v2 format branch-related
>> information could be enhanced without risk of breaking parsers,
>> or having new information put at the end even if it does not fit
>> there (like in previous iteration).
>>
>> One thing that can serve as goal for the series is using the
>> question: would it make __git_ps1() from git-prompt.sh be able
>> to render fully decorated prompt with all bells and whistles,
>> and with all combinations of options.  Thus beside upstream
>> in the future we might want SVN upstream, and/or pushed-to
>> remote branch (and remote push upstream repository), etc.
>>
>> But that's for the future (and it is possible for the future)...
>>
> 
> Yes, I was hoping to be able to simplify and/or speed up
> __git_ps1() with this data.  "Namespacing" the branch data
> here.  And then later add the state data (in a merge,
> in a rebase, and etc.) in a series of "# state.*" headers.
> And so on, until we get everything that __git_ps1() needs.
> However, to really make that work, we might want to add
> a --no-scan (or minimial scan) option, to just return the
> header data, since __git_ps1() doesn't care about the list
> of changes.

But __git_ps1() with GIT_PS1_SHOWDIRTYSTATE would want to know
if there are unstaged and staged changes, and with
GIT_PS1_SHOWUNTRACKEDFILES it would want to know if there
are untracked (unknown) files, isn't it?

And GIT_PS1_SHOWSTASHSTATE would want to know if there is
something stashed, but I guess it is outside the remit of
git-status...
 
Also, __git_ps1() uses colors from git-status, so if it
is switched to use --porcelain=v2, then there should be an
option to turn the color on, isn't it?

-- 
Jakub Narębski

Re: [PATCH v3 7/8] status: update git-status.txt for --porcelain=v2

[Jeff Hostetler]

On 08/02/2016 11:19 AM, Jakub Narębski wrote:
> W dniu 01.08.2016 o 17:39, Jeff Hostetler pisze:
>> On 07/30/2016 01:22 PM, Jakub Narębski wrote:
>>> W dniu 26.07.2016 o 23:11, Jeff Hostetler pisze:
>>>
>>> This is a nice change, available because of lack of backward
>>> compatibility with v1.  The porcelain v2 format branch-related
>>> information could be enhanced without risk of breaking parsers,
>>> or having new information put at the end even if it does not fit
>>> there (like in previous iteration).
>>>
>>> One thing that can serve as goal for the series is using the
>>> question: would it make __git_ps1() from git-prompt.sh be able
>>> to render fully decorated prompt with all bells and whistles,
>>> and with all combinations of options.  Thus beside upstream
>>> in the future we might want SVN upstream, and/or pushed-to
>>> remote branch (and remote push upstream repository), etc.
>>>
>>> But that's for the future (and it is possible for the future)...
>>>
>>
>> Yes, I was hoping to be able to simplify and/or speed up
>> __git_ps1() with this data.  "Namespacing" the branch data
>> here.  And then later add the state data (in a merge,
>> in a rebase, and etc.) in a series of "# state.*" headers.
>> And so on, until we get everything that __git_ps1() needs.
>> However, to really make that work, we might want to add
>> a --no-scan (or minimial scan) option, to just return the
>> header data, since __git_ps1() doesn't care about the list
>> of changes.
>
> But __git_ps1() with GIT_PS1_SHOWDIRTYSTATE would want to know
> if there are unstaged and staged changes, and with
> GIT_PS1_SHOWUNTRACKEDFILES it would want to know if there
> are untracked (unknown) files, isn't it?
>
> And GIT_PS1_SHOWSTASHSTATE would want to know if there is
> something stashed, but I guess it is outside the remit of
> git-status...
>
> Also, __git_ps1() uses colors from git-status, so if it
> is switched to use --porcelain=v2, then there should be an
> option to turn the color on, isn't it?
>

All of these are good questions.  But __git_ps1() is outside my
scope right now.  All I was saying above is that by making
the branch details available here and, later, extending V2
output by adding other such headers to the output, we could
try to remove much of the business logic in __git_ps1() and
hopefully reduce it to just formatting and coloring the prompt
using the computed result from status.

But I've only skimmed __git_ps1() (and it's a little dense),
so I'd have to study it more before I could answer all of your
questions.

Thanks,
Jeff