am: teach mercurial patch parser how to read from stdin

git-mailsplit, which splits mbox patches, will read the patch from stdin
when the filename is "-" or there are no files listed on the
command-line.

To be consistent with this behavior, teach the mercurial patch parser to
read from stdin if the filename is "-" or no files are listed on the
command-line.

Based-on-patch-by: Chris Packham <judge.packham@gmail.com>
Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Paul Tan <pyokagan@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/git-am.sh b/git-am.sh
index 5eec11d5f09c50a83553a8ea5ad763f0d2e44feb..f35710cb502543f35b642fd8a49f0d2cc8beba62 100755 (executable)
--- a/git-am.sh
+++ b/git-am.sh
@@ -327,6 +327,7 @@ split_patches () {
                ;;
        hg)
                this=0
+               test 0 -eq "$#" && set -- -
                for hg in "$@"
                do
                        this=$(( $this + 1 ))
@@ -353,7 +354,7 @@ split_patches () {
                                        print "\n", $_ ;
                                        $subject = 1;
                                }
-                       ' <"$hg" >"$dotest/$msgnum" || clean_abort
+                       ' -- "$hg" >"$dotest/$msgnum" || clean_abort
                done
                echo "$this" >"$dotest/last"
                this=

diff --git a/t/t4150-am.sh b/t/t4150-am.sh
index 4beb4b389413e06bd00a884c76c84fe5da2c78c0..3ebafd9234170f01f422bf063a7fee6b9e5b5dee 100755 (executable)
--- a/t/t4150-am.sh
+++ b/t/t4150-am.sh
@@ -259,6 +259,16 @@ test_expect_success 'am applies hg patch' '
        test_cmp_rev second^ HEAD^
 '
 
+test_expect_success 'am --patch-format=hg applies hg patch' '
+       rm -fr .git/rebase-apply &&
+       git checkout -f first &&
+       git am --patch-format=hg <patch1-hg.eml &&
+       test_path_is_missing .git/rebase-apply &&
+       git diff --exit-code second &&
+       test_cmp_rev second HEAD &&
+       test_cmp_rev second^ HEAD^
+'
+
 test_expect_success 'setup: new author and committer' '
        GIT_AUTHOR_NAME="Another Thor" &&
        GIT_AUTHOR_EMAIL="a.thor@example.com" &&