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[PATCH v3 1/3] check-mailmap: accept "user@host" contacts

From
Jacob Keller <jacob.e.keller@intel.com>
Date
Aug 27, 2024, 21:27 UTC
Message-ID
<20240827-jk-send-email-mailmap-support-v3-1-bec5ba9be391@gmail.com>
In-Reply-To
<20240827-jk-send-email-mailmap-support-v3-0-bec5ba9be391@gmail.com>
From: Jacob Keller <jacob.keller@gmail.com>

git check-mailmap splits each provided contact using split_ident_line. This function requires that the contact either be of the form "Name <user@host>" or of the form "<user@host>". In particular, if the mail portion of the contact is not surrounded by angle brackets, split_ident_line will reject it.

This results in git check-mailmap rejecting attempts to translate simple email addresses:

  $ git check-mailmap user@host
  fatal: unable to parse contact: user@host

This limits the usability of check-mailmap as it requires placing angle brackets around plain email addresses.

In particular, attempting to use git check-mailmap to support mapping addresses in git send-email is not straight forward. The sanitization and validation functions in git send-email strip angle brackets from plain email addresses. It is not trivial to add brackets prior to invoking git check-mailmap.

Instead, modify check_mailmap() to allow such strings as contacts. In particular, treat any line which cannot be split by split_ident_line as a simple email address.

No attempt is made to actually parse the address line, or validate that it is actually an email address. Implementing such validation is not trivial. Besides, we weren't validating the address between angle brackets before anyways.

Signed-off-by: Jacob Keller <jacob.keller@gmail.com>
---
 builtin/check-mailmap.c             | 18 +++++++++-------
 Documentation/git-check-mailmap.txt |  8 +++----
 t/t4203-mailmap.sh                  | 42 +++++++++++++++++++++++++++++++++----
 3 files changed, 53 insertions(+), 15 deletions(-)
diff --git a/builtin/check-mailmap.c b/builtin/check-mailmap.c
index b8a05b8e07b5..6b7fb53494f0 100644
--- a/builtin/check-mailmap.c
+++ b/builtin/check-mailmap.c
@@ -25,13 +25,17 @@ static void check_mailmap(struct string_list *mailmap, const char *contact)
 	size_t namelen, maillen;
 	struct ident_split ident;
 
-	if (split_ident_line(&ident, contact, strlen(contact)))
-		die(_("unable to parse contact: %s"), contact);
-
-	name = ident.name_begin;
-	namelen = ident.name_end - ident.name_begin;
-	mail = ident.mail_begin;
-	maillen = ident.mail_end - ident.mail_begin;
+	if (!split_ident_line(&ident, contact, strlen(contact))) {
+		name = ident.name_begin;
+		namelen = ident.name_end - ident.name_begin;
+		mail = ident.mail_begin;
+		maillen = ident.mail_end - ident.mail_begin;
+	} else {
+		name = NULL;
+		namelen = 0;
+		mail = contact;
+		maillen = strlen(contact);
+	}
 
 	map_user(mailmap, &mail, &maillen, &name, &namelen);
 
diff --git a/Documentation/git-check-mailmap.txt b/Documentation/git-check-mailmap.txt
index 02f441832321..7747e38e25e3 100644
--- a/Documentation/git-check-mailmap.txt
+++ b/Documentation/git-check-mailmap.txt
@@ -15,10 +15,10 @@ SYNOPSIS
 DESCRIPTION
 -----------
 
-For each ``Name $$<user@host>$$'' or ``$$<user@host>$$'' from the command-line
-or standard input (when using `--stdin`), look up the person's canonical name
-and email address (see "Mapping Authors" below). If found, print them;
-otherwise print the input as-is.
+For each ``Name $$<user@host>$$'', ``$$<user@host>$$'', or ``$$user@host$$''
+from the command-line or standard input (when using `--stdin`), look up the
+person's canonical name and email address (see "Mapping Authors" below). If
+found, print them; otherwise print the input as-is.
 
 
 OPTIONS
diff --git a/t/t4203-mailmap.sh b/t/t4203-mailmap.sh
index 79e5f42760d9..2265ff8872df 100755
--- a/t/t4203-mailmap.sh
+++ b/t/t4203-mailmap.sh
@@ -72,12 +72,46 @@ test_expect_success 'check-mailmap --stdin arguments: mapping' '
 	test_cmp expect actual
 '
 
-test_expect_success 'check-mailmap bogus contact' '
-	test_must_fail git check-mailmap bogus
+test_expect_success 'check-mailmap simple address: mapping' '
+	test_when_finished "rm .mailmap" &&
+	cat >.mailmap <<-EOF &&
+	New Name <$GIT_AUTHOR_EMAIL>
+	EOF
+	cat .mailmap >expect &&
+	git check-mailmap "$GIT_AUTHOR_EMAIL" >actual &&
+	test_cmp expect actual
 '
 
-test_expect_success 'check-mailmap bogus contact --stdin' '
-	test_must_fail git check-mailmap --stdin bogus </dev/null
+test_expect_success 'check-mailmap --stdin simple address: mapping' '
+	test_when_finished "rm .mailmap" &&
+	cat >.mailmap <<-EOF &&
+	New Name <$GIT_AUTHOR_EMAIL>
+	EOF
+	cat >stdin <<-EOF &&
+	$GIT_AUTHOR_EMAIL
+	EOF
+	cat .mailmap >expect &&
+	git check-mailmap --stdin <stdin >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'check-mailmap simple address: no mapping' '
+	cat >expect <<-EOF &&
+	<bugs@company.xx>
+	EOF
+	git check-mailmap "bugs@company.xx" >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'check-mailmap --stdin simple address: no mapping' '
+	cat >expect <<-EOF &&
+	<bugs@company.xx>
+	EOF
+	cat >stdin <<-EOF &&
+	bugs@company.xx
+	EOF
+	git check-mailmap --stdin <stdin >actual &&
+	test_cmp expect actual
 '
 
 test_expect_success 'No mailmap' '
-- 
2.46.0.124.g2dc1a81c8933
Previous: Jacob KellerNext: Jacob Keller
Message 2 of 6 in “send-email: add --mailmap support”
  1. 0/3 send-email: add --mailmap supportJacob Keller, Aug 27, 2024
  2. 1/3 check-mailmap: accept "user@host" contactsJacob Keller, Aug 27, 2024
  3. 2/3 check-mailmap: add options for additional mailmap sourcesJacob Keller, Aug 27, 2024
  4. 3/3 send-email: add mailmap support via sendemail.mailmap and --mailmapJacob Keller, Aug 27, 2024
  5. Junio C HamanoAug 28, 2024
  6. Josh SteadmonAug 28, 2024

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