1 files changed, 14 insertions, 0 deletions
diff --git a/git-am.sh b/git-am.sh
index d64d997535..dd60f5d9cb 100755
--- a/git-am.sh
+++ b/git-am.sh
@@ -191,6 +191,20 @@ check_patch_format () {
 			esac
 			;;
 		esac
+		if test -z "$patch_format" &&
+			test -n "$l1" &&
+			test -n "$l2" &&
+			test -n "$l3"
+		then
+			# This begins with three non-empty lines.  Is this a
+			# piece of e-mail a-la RFC2822?  Grab all the headers,
+			# discarding the indented remainder of folded lines,
+			# and see if it looks like that they all begin with the
+			# header field names...
+			sed -n -e '/^$/q' -e '/^[ 	]/d' -e p "$1" |
+			egrep -v '^[A-Za-z]+(-[A-Za-z]+)*:' >/dev/null ||
+			patch_format=mbox
+		fi
 	} < "$1" || clean_abort
 }