[PATCH 1/2] git-mailinfo: add --message-id

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From: Paolo Bonzini <pbonzini@xxxxxxxxxx>

This option adds the content of the Message-Id header at the end of the
commit message prepared by git-mailinfo.  This is useful in order to
associate commit messages automatically with mailing list discussions.

Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
---
 Documentation/git-mailinfo.txt |  5 +++++
 builtin/mailinfo.c             | 22 +++++++++++++++++++++-
 t/t5100-mailinfo.sh            |  4 ++++
 t/t5100/info0012--message-id   |  5 +++++
 t/t5100/msg0012--message-id    |  8 ++++++++
 t/t5100/patch0012--message-id  | 30 ++++++++++++++++++++++++++++++
 6 files changed, 73 insertions(+), 1 deletion(-)
 create mode 100644 t/t5100/info0012--message-id
 create mode 100644 t/t5100/msg0012--message-id
 create mode 100644 t/t5100/patch0012--message-id

diff --git a/Documentation/git-mailinfo.txt b/Documentation/git-mailinfo.txt
index 164a3c6..2e99603 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/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@xxxxxxxxx
+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@xxxxxxxxx>
+Message-Id: <1226501681-24923-1-git-send-email-bda@xxxxxxxxx>
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
-- 
2.1.0


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