am: preliminary support for hg patches

Signed-off-by: Giuseppe Bilotta <giuseppe.bilotta@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/git-am.sh b/git-am.sh
index 0ff1f577a33ccc96adfbb14fa35adfeee9e309f5..eaa8a11450d1efe6f49db11661b5ab30f1fe988f 100755 (executable)
--- a/git-am.sh
+++ b/git-am.sh
@@ -248,6 +248,40 @@ split_patches () {
                this=
                msgnum=
                ;;
+       hg)
+               this=0
+               for hg in "$@"
+               do
+                       this=$(( $this + 1 ))
+                       msgnum=$(printf "%0${prec}d" $this)
+                       # hg stores changeset metadata in #-commented lines preceding
+                       # the commit message and diff(s). The only metadata we care about
+                       # are the User and Date (Node ID and Parent are hashes which are
+                       # only relevant to the hg repository and thus not useful to us)
+                       # Since we cannot guarantee that the commit message is in
+                       # git-friendly format, we put no Subject: line and just consume
+                       # all of the message as the body
+                       perl -M'POSIX qw(strftime)' -ne 'BEGIN { $subject = 0 }
+                               if ($subject) { print ; }
+                               elsif (/^\# User /) { s/\# User/From:/ ; print ; }
+                               elsif (/^\# Date /) {
+                                       my ($hashsign, $str, $time, $tz) = split ;
+                                       $tz = sprintf "%+05d", (0-$tz)/36;
+                                       print "Date: " .
+                                             strftime("%a, %d %b %Y %H:%M:%S ",
+                                                      localtime($time))
+                                             . "$tz\n";
+                               } elsif (/^\# /) { next ; }
+                               else {
+                                       print "\n", $_ ;
+                                       $subject = 1;
+                               }
+                       ' <"$hg" >"$dotest/$msgnum" || clean_abort
+               done
+               echo "$this" >"$dotest/last"
+               this=
+               msgnum=
+               ;;
        *)
                echo "Patch format $patch_format is not supported."
                exit 1