[PATCH] commit: do not lose SQUASH_MSG contents

[Sven Strickroth <sven@cs-ware.de>]

When concluding a conflicted "git merge --squash", the command
failed to read SQUASH_MSG that was prepared by "git merge", and
showed only the "# Conflicts:" list of conflicted paths.

Place the contents from SQUASH_MSG at the beginning, just like we
show the commit log skeleton first when concluding a normal merge,
and then show the "# Conflicts:" list, to help the user write the
log message for the resulting commit.

Signed-off-by: Sven Strickroth <sven@cs-ware.de>
---
 builtin/commit.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/builtin/commit.c b/builtin/commit.c
index d054f84..d40b788 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -726,9 +726,18 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 				      &sb, &ctx);
 		hook_arg1 = "message";
 	} else if (!stat(git_path_merge_msg(), &statbuf)) {
+		/*
+		 * prepend SQUASH_MSG here if it exists and a
+		 * "merge --squash" was originally performed
+		*/
+		if (!stat(git_path_squash_msg(), &statbuf)) {
+			if (strbuf_read_file(&sb, git_path_squash_msg(), 0) < 0)
+				die_errno(_("could not read SQUASH_MSG"));
+			hook_arg1 = "squash";
+		} else
+			hook_arg1 = "merge";
 		if (strbuf_read_file(&sb, git_path_merge_msg(), 0) < 0)
 			die_errno(_("could not read MERGE_MSG"));
-		hook_arg1 = "merge";
 	} else if (!stat(git_path_squash_msg(), &statbuf)) {
 		if (strbuf_read_file(&sb, git_path_squash_msg(), 0) < 0)
 			die_errno(_("could not read SQUASH_MSG"));
-- 
Best regards,
 Sven Strickroth
 PGP key id F5A9D4C4 @ any key-server