Re: [PATCH] Reencode committer info to utf-8 before formatting mail header

Side note.  The previous patch does not help if your commit were
made in non UTF-8 with not too recent git; the code assumes that
commit messages without the new "encoding" headers are in UTF-8.

We might want to help transitioning people by doing something
like this on top of the previous patch.  Then when dealing with
an ancient commit (sorry, I am not saying commits older than 3
weeks are ancient -- but it will be 6 months from now ;-), you
can override that default by setting an environment variable.

---

diff --git a/commit.c b/commit.c
index 9b2b842..a1b5705 100644
--- a/commit.c
+++ b/commit.c

@@ -692,8 +692,12 @@ static char *logmsg_reencode(const struct commit *commit,
 	if (!*output_encoding)
 		return NULL;
 	encoding = get_header(commit, "encoding");
-	if (!encoding)
-		encoding = utf8;
+	if (!encoding) {
+		if (getenv("GIT_OLD_COMMIT_ENCODING"))
+			encoding = strdup(getenv("GIT_OLD_COMMIT_ENCODING"));
+		else
+			encoding = utf8;
+	}
 	if (!strcmp(encoding, output_encoding))
 		out = strdup(commit->buffer);
 	else