From 15e42009c4fb4694a4774ee5bc380ae66697cc79 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sun, 18 Sep 2016 13:14:28 +0100
Subject: [PATCH] Changelog handling: Provide commit_getclogp (nfc)

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 dgit | 22 +++++++++++++++-------
 1 file changed, 15 insertions(+), 7 deletions(-)

diff --git a/dgit b/dgit
index f60e15fc..8bf4794f 100755
--- a/dgit
+++ b/dgit
@@ -879,6 +879,19 @@ sub parsechangelog {
     return $c;
 }
 
+sub commit_getclogp ($) {
+    # Returns the parsed changelog hashref for a particular commit
+    my ($objid) = @_;
+    our %commit_getclogp_memo;
+    my $memo = $commit_getclogp_memo{$objid};
+    return $memo if $memo;
+    mkpath '.git/dgit';
+    my $mclog = ".git/dgit/clog-$objid";
+    runcmd shell_cmd "exec >$mclog", @git, qw(cat-file blob),
+	"$objid:debian/changelog";
+    $commit_getclogp_memo{$objid} = parsechangelog("-l$mclog");
+}
+
 sub must_getcwd () {
     my $d = getcwd();
     defined $d or fail "getcwd failed: $!";
@@ -1787,14 +1800,9 @@ END
 }
 
 sub mergeinfo_getclogp ($) {
-    my ($mi) = @_;
     # Ensures thit $mi->{Clogp} exists and returns it
-    return $mi->{Clogp} if $mi->{Clogp};
-    my $mclog = ".git/dgit/clog-$mi->{Commit}";
-    mkpath '.git/dgit';
-    runcmd shell_cmd "exec >$mclog", @git, qw(cat-file blob),
-	"$mi->{Commit}:debian/changelog";
-    $mi->{Clogp} = parsechangelog("-l$mclog");
+    my ($mi) = @_;
+    $mi->{Clogp} = commit_getclogp($mi->{Commit});
 }
 
 sub mergeinfo_version ($) {
-- 
2.30.2