ref updates: Introduce update_ref_cmd

Currently the comment about `message may be modified' is rather
misleading, since there is no code to do that - but it explains the
semantics of the new function.

We change the appropriate subset of the git update-ref call sites.
These are precisely the ones where we previously specified a message
with -m, except for the quilt cache (where we use the reflog message
as the cache lookup key).

The calls are updates of internal refs etc.

We end up using qw(git) rather than @git.
Otherwise no functional change.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

1 files changed, 6 insertions, 7 deletions

diff --git a/dgit b/dgit
index 5c9cdc3..bbfaea1 100755
--- a/dgit
+++ b/dgit
@@ -2851,15 +2851,14 @@ sub mergeinfo_version ($) {
 
 sub fetch_from_archive_record_1 ($) {
     my ($hash) = @_;
-    runcmd @git, qw(update-ref -m), "dgit fetch $csuite",
-	    'DGIT_ARCHIVE', $hash;
+    runcmd git_update_ref_cmd "dgit fetch $csuite", 'DGIT_ARCHIVE', $hash;
     cmdoutput @git, qw(log -n2), $hash;
     # ... gives git a chance to complain if our commit is malformed
 }
 
 sub fetch_from_archive_record_2 ($) {
     my ($hash) = @_;
-    my @upd_cmd = (@git, qw(update-ref -m), 'dgit fetch', lrref(), $hash);
+    my @upd_cmd = (git_update_ref_cmd 'dgit fetch', lrref(), $hash);
     if (act_local()) {
 	cmdoutput @upd_cmd;
     } else {
@@ -3850,7 +3849,7 @@ sub maybe_split_brain_save ($$$) {
     # => message fragment "$saved" describing disposition of $dgitview
     return "commit id $dgitview" unless defined $split_brain_save;
     my @cmd = (shell_cmd 'cd "$1"; shift', $maindir,
-	       @git, qw(update-ref -m),
+	       git_update_ref_cmd
 	       "dgit --dgit-view-save $msg HEAD=$headref",
 	       $split_brain_save, $dgitview);
     runcmd @cmd;
@@ -4050,7 +4049,7 @@ sub plain_overwrite_pseudomerge ($$$) {
 	$clogp, $head, $archive_hash, $i_arch_v,
 	"dgit", $m;
 
-    runcmd @git, qw(update-ref -m), $m, 'HEAD', $r, $head;
+    runcmd git_update_ref_cmd $m, 'HEAD', $r, $head;
 
     progress "Make pseudo-merge of $i_arch_v->[0] into your HEAD.";
     return $r;
@@ -4496,7 +4495,7 @@ END
 
     runcmd_ordryrun @git,
 	qw(-c push.followTags=false push), access_giturl(), @pushrefs;
-    runcmd_ordryrun @git, qw(update-ref -m), 'dgit push', lrref(), $dgithead;
+    runcmd_ordryrun git_update_ref_cmd 'dgit push', lrref(), $dgithead;
 
     supplementary_message(<<'END');
 Push failed, while obtaining signatures on the .changes and .dsc.
@@ -6437,7 +6436,7 @@ sub cmd_quilt_fixup {
 
 sub import_dsc_result {
     my ($dstref, $newhash, $what_log, $what_msg) = @_;
-    my @cmd = (@git, qw(update-ref -m), $what_log, $dstref, $newhash);
+    my @cmd = (git_update_ref_cmd $what_log, $dstref, $newhash);
     runcmd @cmd;
     check_gitattrs($newhash, "source tree");