[RFC/PATCH] commit/status: show the index-worktree with -v -v

[Michael J Gruber <git@drmicha.warpmail.net>]

git commit and git status in long format show the diff between HEAD
and the index when given -v. This allows previewing a commit to be made.

They also list tracked files with unstaged changes, but without a diff.

Introduce '-v -v' which shows the diff between the index and the
worktree in addition to HEAD index diff. This allows to review unstaged
changes which might be missing from the commit.

Signed-off-by: Michael J Gruber <git@drmicha.warpmail.net>
---
Also, the git status man page does not mention -v at all, and the doc
for git status (long format) and the status parts of the git commit
man page should really be the same.

In any case, this may have helped the OP with his amend oversight.

 Documentation/git-commit.txt | 4 ++++
 wt-status.c                  | 8 ++++++++
 2 files changed, 12 insertions(+)

diff --git a/Documentation/git-commit.txt b/Documentation/git-commit.txt
index 1e74b75..f14d2ec 100644
--- a/Documentation/git-commit.txt
+++ b/Documentation/git-commit.txt
@@ -284,6 +284,10 @@ configuration variable documented in linkgit:git-config[1].
 	would be committed at the bottom of the commit message
 	template.  Note that this diff output doesn't have its
 	lines prefixed with '#'.
++
+If specified twice, show in addition the unified diff between
+what would be committed and the worktree files, i.e. the unstaged
+changes to tracked files.
 
 -q::
 --quiet::
diff --git a/wt-status.c b/wt-status.c
index b54eac5..75674c2 100644
--- a/wt-status.c
+++ b/wt-status.c
@@ -874,6 +874,14 @@ static void wt_status_print_verbose(struct wt_status *s)
 		wt_status_add_cut_line(s->fp);
 	}
 	run_diff_index(&rev, 1);
+	if (s->verbose > 1) {
+		setup_work_tree();
+		if (read_cache_preload(&rev.diffopt.pathspec) < 0)
+			perror("read_cache_preload");
+		rev.diffopt.a_prefix = 0; /* allow run_diff_files */
+		rev.diffopt.b_prefix = 0; /* to reset the prefixes */
+		run_diff_files(&rev, 0);
+	}
 }
 
 static void wt_status_print_tracking(struct wt_status *s)
-- 
2.3.0.rc0.202.g6f441c7