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From: Alban Gruin <alban.gruin@gmail.com>
To: git@vger.kernel.org
Cc: Stefan Beller <sbeller@google.com>,
	Christian Couder <christian.couder@gmail.com>,
	Pratik Karki <predatoramigo@gmail.com>,
	Johannes Schindelin <Johannes.Schindelin@gmx.de>,
	phillip.wood@dunelm.org.uk, Alban Gruin <alban.gruin@gmail.com>
Subject: [GSoC][PATCH v5 3/3] rebase -i: rewrite checkout_onto() in C
Date: Fri, 29 Jun 2018 17:14:35 +0200	[thread overview]
Message-ID: <20180629151435.31868-4-alban.gruin@gmail.com> (raw)
In-Reply-To: <20180629151435.31868-1-alban.gruin@gmail.com>

This rewrites checkout_onto() from shell to C.

A new command (“checkout-onto”) is added to rebase--helper.c. The shell
version is then stripped.

Signed-off-by: Alban Gruin <alban.gruin@gmail.com>
---
 builtin/rebase--helper.c   |  7 ++++++-
 git-rebase--interactive.sh | 25 ++++---------------------
 sequencer.c                | 19 +++++++++++++++++++
 sequencer.h                |  3 +++
 4 files changed, 32 insertions(+), 22 deletions(-)

diff --git a/builtin/rebase--helper.c b/builtin/rebase--helper.c
index 6c789e78b..0091e094b 100644
--- a/builtin/rebase--helper.c
+++ b/builtin/rebase--helper.c
@@ -18,7 +18,8 @@ int cmd_rebase__helper(int argc, const char **argv, const char *prefix)
 	enum {
 		CONTINUE = 1, ABORT, MAKE_SCRIPT, SHORTEN_OIDS, EXPAND_OIDS,
 		CHECK_TODO_LIST, SKIP_UNNECESSARY_PICKS, REARRANGE_SQUASH,
-		ADD_EXEC, APPEND_TODO_HELP, EDIT_TODO, PREPARE_BRANCH
+		ADD_EXEC, APPEND_TODO_HELP, EDIT_TODO, PREPARE_BRANCH,
+		CHECKOUT_ONTO
 	} command = 0;
 	struct option options[] = {
 		OPT_BOOL(0, "ff", &opts.allow_ff, N_("allow fast-forward")),
@@ -54,6 +55,8 @@ int cmd_rebase__helper(int argc, const char **argv, const char *prefix)
 			    EDIT_TODO),
 		OPT_CMDMODE(0, "prepare-branch", &command,
 			    N_("prepare the branch to be rebased"), PREPARE_BRANCH),
+		OPT_CMDMODE(0, "checkout-onto", &command,
+			    N_("checkout a commit"), CHECKOUT_ONTO),
 		OPT_END()
 	};
 
@@ -99,5 +102,7 @@ int cmd_rebase__helper(int argc, const char **argv, const char *prefix)
 		return !!edit_todo_list(flags);
 	if (command == PREPARE_BRANCH && argc == 2)
 		return !!prepare_branch_to_be_rebased(&opts, argv[1], verbose);
+	if (command == CHECKOUT_ONTO && argc == 4)
+		return !!checkout_onto(&opts, argv[1], argv[2], argv[3], verbose);
 	usage_with_options(builtin_rebase_helper_usage, options);
 }
diff --git a/git-rebase--interactive.sh b/git-rebase--interactive.sh
index 77e972bb6..b68f108f2 100644
--- a/git-rebase--interactive.sh
+++ b/git-rebase--interactive.sh
@@ -28,17 +28,6 @@ case "$comment_char" in
 	;;
 esac
 
-orig_reflog_action="$GIT_REFLOG_ACTION"
-
-comment_for_reflog () {
-	case "$orig_reflog_action" in
-	''|rebase*)
-		GIT_REFLOG_ACTION="rebase -i ($1)"
-		export GIT_REFLOG_ACTION
-		;;
-	esac
-}
-
 die_abort () {
 	apply_autostash
 	rm -rf "$state_dir"
@@ -70,14 +59,6 @@ collapse_todo_ids() {
 	git rebase--helper --shorten-ids
 }
 
-# Switch to the branch in $into and notify it in the reflog
-checkout_onto () {
-	comment_for_reflog start
-	GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: checkout $onto_name"
-	output git checkout $onto || die_abort "$(gettext "could not detach HEAD")"
-	git update-ref ORIG_HEAD $orig_head
-}
-
 get_missing_commit_check_level () {
 	check_level=$(git config --get rebase.missingCommitsCheck)
 	check_level=${check_level:-ignore}
@@ -176,7 +157,8 @@ EOF
 
 	git rebase--helper --check-todo-list || {
 		ret=$?
-		checkout_onto
+		git rebase--helper --checkout-onto "$onto_name" "$onto" \
+		    "$orig_head" ${verbose:+--verbose}
 		exit $ret
 	}
 
@@ -186,7 +168,8 @@ EOF
 	onto="$(git rebase--helper --skip-unnecessary-picks)" ||
 	die "Could not skip unnecessary pick commands"
 
-	checkout_onto
+	git rebase--helper --checkout-onto "$onto_name" "$onto" "$orig_head" \
+	    ${verbose:+--verbose}
 	require_clean_work_tree "rebase"
 	exec git rebase--helper ${force_rebase:+--no-ff} $allow_empty_message \
 	     --continue
diff --git a/sequencer.c b/sequencer.c
index dd0cf3cb5..ec6de4eda 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -3165,6 +3165,25 @@ int prepare_branch_to_be_rebased(struct replay_opts *opts, const char *commit,
 	return 0;
 }
 
+int checkout_onto(struct replay_opts *opts,
+		  const char *onto_name, const char *onto,
+		  const char *orig_head, unsigned verbose)
+{
+	struct object_id oid;
+	const char *action = reflog_message(opts, "start", "checkout %s", onto_name);
+
+	if (get_oid(orig_head, &oid))
+		return error(_("%s: not a valid OID"), orig_head);
+
+	if (run_git_checkout(opts, onto, verbose, action)) {
+		apply_autostash(opts);
+		sequencer_remove_state(opts);
+		return error(_("could not detach HEAD"));
+	}
+
+	return update_ref(NULL, "ORIG_HEAD", &oid, NULL, 0, UPDATE_REFS_MSG_ON_ERR);
+}
+
 static const char rescheduled_advice[] =
 N_("Could not execute the todo command\n"
 "\n"
diff --git a/sequencer.h b/sequencer.h
index 3821420b0..ba5e59f02 100644
--- a/sequencer.h
+++ b/sequencer.h
@@ -108,6 +108,9 @@ void commit_post_rewrite(const struct commit *current_head,
 
 int prepare_branch_to_be_rebased(struct replay_opts *opts, const char *commit,
 				 int verbose);
+int checkout_onto(struct replay_opts *opts,
+		  const char *onto_name, const char *onto,
+		  const char *orig_head, unsigned verbose);
 
 #define SUMMARY_INITIAL_COMMIT   (1 << 0)
 #define SUMMARY_SHOW_AUTHOR_DATE (1 << 1)
-- 
2.18.0


  parent reply	other threads:[~2018-06-29 15:15 UTC|newest]

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-18 13:18 [GSoC][PATCH 0/3] rebase -i: rewrite reflog operations in C Alban Gruin
2018-06-18 13:18 ` [GSoC][PATCH 1/3] sequencer: add a new function to silence a command, except if it fails Alban Gruin
2018-06-18 15:26   ` Phillip Wood
2018-06-18 16:46     ` Alban Gruin
2018-06-18 16:26   ` Christian Couder
2018-06-18 17:05     ` Alban Gruin
2018-06-18 13:18 ` [GSoC][PATCH 2/3] rebase -i: rewrite setup_reflog_action() in C Alban Gruin
2018-06-18 15:34   ` Phillip Wood
2018-06-18 17:04     ` Alban Gruin
2018-06-18 22:01   ` Stefan Beller
2018-06-19  6:51     ` Johannes Schindelin
2018-06-18 13:18 ` [GSoC][PATCH 3/3] rebase -i: rewrite checkout_onto() " Alban Gruin
2018-06-18 16:09   ` Phillip Wood
2018-06-18 17:04     ` Alban Gruin
2018-06-19 15:44 ` [GSoC][PATCH v2 0/3] rebase -i: rewrite reflog operations " Alban Gruin
2018-06-19 15:44   ` [GSoC][PATCH v2 1/3] sequencer: add a new function to silence a command, except if it fails Alban Gruin
2018-06-21  9:37     ` Johannes Schindelin
2018-06-21 11:53       ` Alban Gruin
2018-06-19 15:44   ` [GSoC][PATCH v2 2/3] rebase -i: rewrite setup_reflog_action() in C Alban Gruin
2018-06-21 10:34     ` Johannes Schindelin
2018-06-19 15:44   ` [GSoC][PATCH v2 3/3] rebase -i: rewrite checkout_onto() " Alban Gruin
2018-06-21 10:38     ` Johannes Schindelin
2018-06-19 18:35   ` [GSoC][PATCH v2 0/3] rebase -i: rewrite reflog operations " Stefan Beller
2018-06-21  8:39   ` Johannes Schindelin
2018-06-21 14:17   ` [GSoC][PATCH v3 " Alban Gruin
2018-06-21 14:17     ` [GSoC][PATCH v3 1/3] sequencer: add a new function to silence a command, except if it fails Alban Gruin
2018-06-21 22:03       ` Junio C Hamano
2018-06-22 20:47         ` Alban Gruin
2018-06-21 14:17     ` [GSoC][PATCH v3 2/3] rebase -i: rewrite setup_reflog_action() in C Alban Gruin
2018-06-22 16:27       ` Junio C Hamano
2018-06-22 20:48         ` Alban Gruin
2018-06-25 15:34           ` Junio C Hamano
2018-06-25 18:21             ` Alban Gruin
2018-06-25 21:14               ` Johannes Schindelin
2018-06-26  9:13                 ` Pratik Karki
2018-06-26 17:44               ` Junio C Hamano
2018-06-21 14:17     ` [GSoC][PATCH v3 3/3] rebase -i: rewrite checkout_onto() " Alban Gruin
2018-06-25 13:44     ` [GSoC][PATCH v4 0/3] rebase -i: rewrite reflog operations " Alban Gruin
2018-06-25 13:44       ` [GSoC][PATCH v4 1/3] sequencer: extract a function to silence a command, except if it fails Alban Gruin
2018-06-25 13:44       ` [GSoC][PATCH v4 2/3] rebase -i: rewrite checkout_onto() in C Alban Gruin
2018-06-26 17:35         ` Junio C Hamano
2018-06-25 13:44       ` [GSoC][PATCH v4 3/3] rebase -i: rewrite setup_reflog_action() " Alban Gruin
2018-06-29 15:14       ` [GSoC][PATCH v5 0/3] rebase -i: rewrite reflog operations " Alban Gruin
2018-06-29 15:14         ` [GSoC][PATCH v5 1/3] sequencer: add a new function to silence a command, except if it fails Alban Gruin
2018-06-29 15:14         ` [GSoC][PATCH v5 2/3] rebase -i: rewrite setup_reflog_action() in C Alban Gruin
2018-06-29 16:50           ` Junio C Hamano
2018-06-29 15:14         ` Alban Gruin [this message]
2018-06-29 16:55         ` [GSoC][PATCH v5 0/3] rebase -i: rewrite reflog operations " Junio C Hamano
2018-06-29 18:23           ` Junio C Hamano
2018-07-02 10:36             ` Alban Gruin
2018-07-03 18:15               ` Junio C Hamano

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