[PATCH] guilt: update reflog with annotations of guilt-command being run

Many of the updates made by guilt use git update-ref, which means that
the output of "git reflog" is extremely unedifying, e.g:

ff0031d HEAD@{177}: reset: moving to ff0031d848a0cd7002606f9feef958de8d5edf19
90f4305 HEAD@{178}:
a638d43 HEAD@{179}:
ff0031d HEAD@{180}:
079788d HEAD@{181}:
87a6280 HEAD@{182}:
5b9554d HEAD@{183}:
de9e918 HEAD@{184}: reset: moving to de9e9181bc066d63d78b768e95b5d949e2a8673a
5b9554d HEAD@{185}:

So teach guilt to use the "set_reflog_action" helper, and since
git-update-ref doesn't respect the GIT_REFLOG_ACTION environment
variable, use its -m option so that "git reflog" can look like this
instead:

1eaa566 HEAD@{11}: guilt-push: track-more-dependencies-on-transaction-commit
ab714af HEAD@{12}: guilt-push: move-lockdep-tracking-to-journal_s
7a4b188 HEAD@{13}: guilt-push: move-lockdep-instrumentation-for-jbd2-handles
78d9625 HEAD@{14}: guilt-push: respect-nobarrier-mount-option-in-nojournal-mode
d08854f HEAD@{15}: guilt-pop: updating HEAD
d08854f HEAD@{16}: guilt-pop: updating HEAD
d08854f HEAD@{17}: guilt-push: optimize-ext4_should_retry_alloc-to-improve-ENOSPC-performance

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: Josef 'Jeff' Sipek <redacted>
---
 guilt | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/guilt b/guilt
index 35177b9..38d426b 100755
--- a/guilt
+++ b/guilt

@@ -114,6 +114,7 @@ if [ $# -ne 0 ]; then
 		disp "" >&2
 		exit 1
 	fi
+	set_reflog_action "guilt-$CMDNAME"
 
 	shift
 else

@@ -640,7 +641,7 @@ commit()
 		commitish=`git commit-tree $treeish -p $2 < "$TMP_MSG"`
 		if $old_style_prefix || git rev-parse --verify --quiet refs/heads/$GUILT_PREFIX$branch >/dev/null
 		then
-			git update-ref HEAD $commitish
+			git update-ref -m "$GIT_REFLOG_ACTION" HEAD $commitish
 		else
 			git branch $GUILT_PREFIX$branch $commitish
 			git symbolic-ref HEAD refs/heads/$GUILT_PREFIX$branch

@@ -687,7 +688,8 @@ push_patch()
 			fi
 		fi
 
-		commit "$pname" HEAD
+		GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: $pname" \
+			commit "$pname" HEAD
 
 		echo "$pname" >> "$applied"
 

-- 
2.5.0