[PATCHv3 2/4] git-am foreign patch support: autodetect some patch formats

From

Giuseppe Bilotta <giuseppe.bilotta@gmail.com>

Date

May 27, 2009, 09:25 UTC

Message-ID

<1243416319-31477-3-git-send-email-giuseppe.bilotta@gmail.com>

In-Reply-To

<1243416319-31477-2-git-send-email-giuseppe.bilotta@gmail.com>

Include checks for mailboxes, stgit patch series, stgit single patches
and hg patches.
---
 git-am.sh |   40 +++++++++++++++++++++++++++++++++++++++-
 1 files changed, 39 insertions(+), 1 deletions(-)

diff --git a/git-am.sh b/git-am.sh
index da160de..192ad1e 100755
--- a/git-am.sh
+++ b/git-am.sh
@@ -142,7 +142,45 @@ check_patch_format () {
 	then
 		return 0
 	fi
-	patch_format=mbox
+
+	# we default to mbox format if input is from stdin and for
+	# directories
+	if test $# = 0 || test "x$1" = "x-" || test -d "$1"
+	then
+		patch_format=mbox
+		return 0
+	fi
+
+	# otherwise, check the first few lines of the first patch to try
+	# to detect its format
+	{
+		read l1
+		read l2
+		read l3
+		case "$l1" in
+			"From "*|"From: "*)
+				patch_format=mbox
+				;;
+			'# This series applies on GIT commit'*)
+				patch_format=stgit-series
+				;;
+			"# HG changeset patch")
+				patch_format=hg
+				;;
+			*)
+				# if the second line is empty and the third is
+				# a From, Author or Date entry, this is very
+				# likely an StGIT patch
+				case "$l2,$l3" in
+					,"From: "*|,"Author: "*|,"Date: "*)
+						patch_format=stgit
+						;;
+					*)
+						;;
+				esac
+				;;
+		esac
+	} < "$1"
 }
 
 split_patches () {

-- 
1.6.3.1.274.gd2e8.dirty