Quote LF in urls git fetch saves in FETCH_HEAD

The fmt-merge-msg does a strong syntax checking of its input and fails
with if it is incorrect. The LF character is the only character
important for fmt-merge-msg. As the url in FETCH_HEAD plays only
informational role, a quoted representation of the url should be good
and true enough.
The url often comes from either user-editable config or command line,
so it is reasonable to expect all kinds of characters in it, including
the characters which the format of FETCH_HEAD considers special (line
separator in this case).

Noticed and reported by Hugo Mildenberger.

Signed-off-by: Alex Riesen <raa.lkml@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin-fetch.c b/builtin-fetch.c
index 3c998ea740adf474ee980fc763bd7156b9ce81af..ec75df0900358598c024d4039068dd2b9ccf6fe5 100644 (file)
--- a/builtin-fetch.c
+++ b/builtin-fetch.c
@@ -353,12 +353,18 @@ static int store_updated_refs(const char *url, const char *remote_name,
                                                    kind);
                        note_len += sprintf(note + note_len, "'%s' of ", what);
                }
-               note_len += sprintf(note + note_len, "%.*s", url_len, url);
-               fprintf(fp, "%s\t%s\t%s\n",
+               note[note_len] = '\0';
+               fprintf(fp, "%s\t%s\t%s",
                        sha1_to_hex(commit ? commit->object.sha1 :
                                    rm->old_sha1),
                        rm->merge ? "" : "not-for-merge",
                        note);
+               for (i = 0; i < url_len; ++i)
+                       if ('\n' == url[i])
+                               fputs("\\n", fp);
+                       else
+                               fputc(url[i], fp);
+               fputc('\n', fp);
 
                if (ref)
                        rc |= update_local_ref(ref, what, note);