Merge branch 'pb/am-message-id-footer'

"git am" learned "--message-id" option to copy the message ID of
the incoming e-mail to the log message of resulting commit.

* pb/am-message-id-footer:
  git-am: add --message-id/--no-message-id
  git-mailinfo: add --message-id

9 files changed, 126 insertions, 3 deletions

diff --git a/Documentation/git-am.txt b/Documentation/git-am.txt
index 9adce37..cfb74bc 100644
--- a/Documentation/git-am.txt
+++ b/Documentation/git-am.txt
@@ -57,6 +57,17 @@ OPTIONS
 --no-scissors::
 	Ignore scissors lines (see linkgit:git-mailinfo[1]).
 
+-m::
+--message-id::
+	Pass the `-m` flag to 'git mailinfo' (see linkgit:git-mailinfo[1]),
+	so that the Message-ID header is added to the commit message.
+	The `am.messageid` configuration variable can be used to specify
+	the default behaviour.
+
+--no-message-id::
+	Do not add the Message-ID header to the commit message.
+	`no-message-id` is useful to override `am.messageid`.
+
 -q::
 --quiet::
 	Be quiet. Only print error messages.
diff --git a/Documentation/git-mailinfo.txt b/Documentation/git-mailinfo.txt
index 164a3c6..0947084 100644
--- a/Documentation/git-mailinfo.txt
+++ b/Documentation/git-mailinfo.txt
@@ -66,6 +66,11 @@ conversion, even with this flag.
 -n::
 	Disable all charset re-coding of the metadata.
 
+-m::
+--message-id::
+	Copy the Message-ID header at the end of the commit message.  This
+	is useful in order to associate commits with mailing list discussions.
+
 --scissors::
 	Remove everything in body before a scissors line.  A line that
 	mainly consists of scissors (either ">8" or "8<") and perforation
diff --git a/builtin/mailinfo.c b/builtin/mailinfo.c
index 6a14d29..c8a47c1 100644
--- a/builtin/mailinfo.c
+++ b/builtin/mailinfo.c
@@ -15,6 +15,7 @@ static const char *metainfo_charset;
 static struct strbuf line = STRBUF_INIT;
 static struct strbuf name = STRBUF_INIT;
 static struct strbuf email = STRBUF_INIT;
+static char *message_id;
 
 static enum  {
 	TE_DONTCARE, TE_QP, TE_BASE64
@@ -24,6 +25,7 @@ static struct strbuf charset = STRBUF_INIT;
 static int patch_lines;
 static struct strbuf **p_hdr_data, **s_hdr_data;
 static int use_scissors;
+static int add_message_id;
 static int use_inbody_headers = 1;
 
 #define MAX_HDR_PARSED 10
@@ -198,6 +200,12 @@ static void handle_content_type(struct strbuf *line)
 	}
 }
 
+static void handle_message_id(const struct strbuf *line)
+{
+	if (add_message_id)
+		message_id = strdup(line->buf);
+}
+
 static void handle_content_transfer_encoding(const struct strbuf *line)
 {
 	if (strcasestr(line->buf, "base64"))
@@ -342,6 +350,14 @@ static int check_header(const struct strbuf *line,
 		ret = 1;
 		goto check_header_out;
 	}
+	if (cmp_header(line, "Message-Id")) {
+		len = strlen("Message-Id: ");
+		strbuf_add(&sb, line->buf + len, line->len - len);
+		decode_header(&sb);
+		handle_message_id(&sb);
+		ret = 1;
+		goto check_header_out;
+	}
 
 	/* for inbody stuff */
 	if (starts_with(line->buf, ">From") && isspace(line->buf[5])) {
@@ -816,6 +832,8 @@ static int handle_commit_msg(struct strbuf *line)
 	}
 
 	if (patchbreak(line)) {
+		if (message_id)
+			fprintf(cmitmsg, "Message-Id: %s\n", message_id);
 		fclose(cmitmsg);
 		cmitmsg = NULL;
 		return 1;
@@ -1013,7 +1031,7 @@ static int git_mailinfo_config(const char *var, const char *value, void *unused)
 }
 
 static const char mailinfo_usage[] =
-	"git mailinfo [-k|-b] [-u | --encoding=<encoding> | -n] [--scissors | --no-scissors] msg patch < mail >info";
+	"git mailinfo [-k|-b] [-m | --message-id] [-u | --encoding=<encoding> | -n] [--scissors | --no-scissors] msg patch < mail >info";
 
 int cmd_mailinfo(int argc, const char **argv, const char *prefix)
 {
@@ -1032,6 +1050,8 @@ int cmd_mailinfo(int argc, const char **argv, const char *prefix)
 			keep_subject = 1;
 		else if (!strcmp(argv[1], "-b"))
 			keep_non_patch_brackets_in_subject = 1;
+		else if (!strcmp(argv[1], "-m") || !strcmp(argv[1], "--message-id"))
+			add_message_id = 1;
 		else if (!strcmp(argv[1], "-u"))
 			metainfo_charset = def_charset;
 		else if (!strcmp(argv[1], "-n"))
diff --git a/git-am.sh b/git-am.sh
index ee61a77..a67d0f9 100755
--- a/git-am.sh
+++ b/git-am.sh
@@ -17,6 +17,7 @@ s,signoff       add a Signed-off-by line to the commit message
 u,utf8          recode into utf8 (default)
 k,keep          pass -k flag to git-mailinfo
 keep-non-patch  pass -b flag to git-mailinfo
+m,message-id    pass -m flag to git-mailinfo
 keep-cr         pass --keep-cr flag to git-mailsplit for mbox format
 no-keep-cr      do not pass --keep-cr flag to git-mailsplit independent of am.keepcr
 c,scissors      strip everything before a scissors line
@@ -371,13 +372,18 @@ split_patches () {
 prec=4
 dotest="$GIT_DIR/rebase-apply"
 sign= utf8=t keep= keepcr= skip= interactive= resolved= rebasing= abort=
-resolvemsg= resume= scissors= no_inbody_headers=
+messageid= resolvemsg= resume= scissors= no_inbody_headers=
 git_apply_opt=
 committer_date_is_author_date=
 ignore_date=
 allow_rerere_autoupdate=
 gpg_sign_opt=
 
+if test "$(git config --bool --get am.messageid)" = true
+then
+    messageid=t
+fi
+
 if test "$(git config --bool --get am.keepcr)" = true
 then
     keepcr=t
@@ -400,6 +406,10 @@ it will be removed. Please do not use it anymore."
 		utf8=t ;; # this is now default
 	--no-utf8)
 		utf8= ;;
+	-m|--message-id)
+		messageid=t ;;
+	--no-message-id)
+		messageid=f ;;
 	-k|--keep)
 		keep=t ;;
 	--keep-non-patch)
@@ -567,6 +577,7 @@ Use \"git am --abort\" to remove it.")"
 	echo "$sign" >"$dotest/sign"
 	echo "$utf8" >"$dotest/utf8"
 	echo "$keep" >"$dotest/keep"
+	echo "$messageid" >"$dotest/messageid"
 	echo "$scissors" >"$dotest/scissors"
 	echo "$no_inbody_headers" >"$dotest/no_inbody_headers"
 	echo "$GIT_QUIET" >"$dotest/quiet"
@@ -621,6 +632,12 @@ b)
 *)
 	keep= ;;
 esac
+case "$(cat "$dotest/messageid")" in
+t)
+	messageid=-m ;;
+f)
+	messageid= ;;
+esac
 case "$(cat "$dotest/scissors")" in
 t)
 	scissors=--scissors ;;
@@ -692,7 +709,7 @@ do
 			get_author_ident_from_commit "$commit" >"$dotest/author-script"
 			git diff-tree --root --binary --full-index "$commit" >"$dotest/patch"
 		else
-			git mailinfo $keep $no_inbody_headers $scissors $utf8 "$dotest/msg" "$dotest/patch" \
+			git mailinfo $keep $no_inbody_headers $messageid $scissors $utf8 "$dotest/msg" "$dotest/patch" \
 				<"$dotest/$msgnum" >"$dotest/info" ||
 				stop_here $this
 
diff --git a/t/t4150-am.sh b/t/t4150-am.sh
index 5edb79a..306e6f3 100755
--- a/t/t4150-am.sh
+++ b/t/t4150-am.sh
@@ -85,6 +85,7 @@ test_expect_success setup '
 
 	git format-patch --stdout first >patch1 &&
 	{
+		echo "Message-Id: <1226501681-24923-1-git-send-email-bda@mnsspb.ru>" &&
 		echo "X-Fake-Field: Line One" &&
 		echo "X-Fake-Field: Line Two" &&
 		echo "X-Fake-Field: Line Three" &&
@@ -536,4 +537,26 @@ test_expect_success 'am empty-file does not infloop' '
 	test_i18ncmp expected actual
 '
 
+test_expect_success 'am --message-id really adds the message id' '
+	rm -fr .git/rebase-apply &&
+	git reset --hard &&
+	git checkout HEAD^ &&
+	git am --message-id patch1.eml &&
+	test_path_is_missing .git/rebase-apply &&
+	git cat-file commit HEAD | tail -n1 >actual &&
+	grep Message-Id patch1.eml >expected &&
+	test_cmp expected actual
+'
+
+test_expect_success 'am --message-id -s signs off after the message id' '
+	rm -fr .git/rebase-apply &&
+	git reset --hard &&
+	git checkout HEAD^ &&
+	git am -s --message-id patch1.eml &&
+	test_path_is_missing .git/rebase-apply &&
+	git cat-file commit HEAD | tail -n2 | head -n1 >actual &&
+	grep Message-Id patch1.eml >expected &&
+	test_cmp expected actual
+'
+
 test_done
diff --git a/t/t5100-mailinfo.sh b/t/t5100-mailinfo.sh
index 9e1ad1c..60df10f 100755
--- a/t/t5100-mailinfo.sh
+++ b/t/t5100-mailinfo.sh
@@ -35,6 +35,10 @@ do
 		then
 			check_mailinfo $mail --no-inbody-headers
 		fi
+		if test -f "$TEST_DIRECTORY"/t5100/msg$mail--message-id
+		then
+			check_mailinfo $mail --message-id
+		fi
 	'
 done
 
diff --git a/t/t5100/info0012--message-id b/t/t5100/info0012--message-id
new file mode 100644
index 0000000..ac1216f
--- /dev/null
+++ b/t/t5100/info0012--message-id
@@ -0,0 +1,5 @@
+Author: Dmitriy Blinov
+Email: bda@mnsspb.ru
+Subject: Изменён список пакетов необходимых для сборки
+Date: Wed, 12 Nov 2008 17:54:41 +0300
+
diff --git a/t/t5100/msg0012--message-id b/t/t5100/msg0012--message-id
new file mode 100644
index 0000000..376e26e
--- /dev/null
+++ b/t/t5100/msg0012--message-id
@@ -0,0 +1,8 @@
+textlive-* исправлены на texlive-*
+docutils заменён на python-docutils
+
+Действительно, оказалось, что rest2web вытягивает за собой
+python-docutils. В то время как сам rest2web не нужен.
+
+Signed-off-by: Dmitriy Blinov <bda@mnsspb.ru>
+Message-Id: <1226501681-24923-1-git-send-email-bda@mnsspb.ru>
diff --git a/t/t5100/patch0012--message-id b/t/t5100/patch0012--message-id
new file mode 100644
index 0000000..36a0b68
--- /dev/null
+++ b/t/t5100/patch0012--message-id
@@ -0,0 +1,30 @@
+---
+ howto/build_navy.txt |    6 +++---
+ 1 files changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/howto/build_navy.txt b/howto/build_navy.txt
+index 3fd3afb..0ee807e 100644
+--- a/howto/build_navy.txt
++++ b/howto/build_navy.txt
+@@ -119,8 +119,8 @@
+    - libxv-dev
+    - libusplash-dev
+    - latex-make
+-   - textlive-lang-cyrillic
+-   - textlive-latex-extra
++   - texlive-lang-cyrillic
++   - texlive-latex-extra
+    - dia
+    - python-pyrex
+    - libtool
+@@ -128,7 +128,7 @@
+    - sox
+    - cython
+    - imagemagick
+-   - docutils
++   - python-docutils
+ 
+ #. на машине dinar: добавить свой открытый ssh-ключ в authorized_keys2 пользователя ddev
+ #. на своей машине: отредактировать /etc/sudoers (команда ``visudo``) примерно следующим образом::
+-- 
+1.5.6.5