config: allow giving separate author and committer idents

The author.email, author.name, committer.email and committer.name
settings are analogous to the GIT_AUTHOR_* and GIT_COMMITTER_*
environment variables, but for the git config system. This allows them
to be set separately for each repository.

Git supports setting different authorship and committer
information with environment variables. However, environment variables
are set in the shell, so if different authorship and committer
information is needed for different repositories an external tool is
required.

This adds support to git config for author.email, author.name,
committer.email and committer.name  settings so this information
can be set per repository.

Also, it generalizes the fmt_ident function so it can handle author vs
committer identification.

Signed-off-by: William Hubbs <williamh@gentoo.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 74 insertions, 0 deletions

diff --git a/t/t7517-per-repo-email.sh b/t/t7517-per-repo-email.sh
index 231b8cc..b2401ce 100755
--- a/t/t7517-per-repo-email.sh
+++ b/t/t7517-per-repo-email.sh
@@ -85,4 +85,78 @@ test_expect_success REBASE_P \
 	test_must_fail git rebase -p master
 '
 
+test_expect_success 'author.name overrides user.name' '
+	test_config user.name user &&
+	test_config user.email user@example.com &&
+	test_config author.name author &&
+	test_commit author-name-override-user &&
+	echo author user@example.com > expected-author &&
+	echo user user@example.com > expected-committer &&
+	git log --format="%an %ae" -1 > actual-author &&
+	git log --format="%cn %ce" -1 > actual-committer &&
+	test_cmp expected-author actual-author &&
+	test_cmp expected-committer actual-committer
+'
+
+test_expect_success 'author.email overrides user.email' '
+	test_config user.name user &&
+	test_config user.email user@example.com &&
+	test_config author.email author@example.com &&
+	test_commit author-email-override-user &&
+	echo user author@example.com > expected-author &&
+	echo user user@example.com > expected-committer &&
+	git log --format="%an %ae" -1 > actual-author &&
+	git log --format="%cn %ce" -1 > actual-committer &&
+	test_cmp expected-author actual-author &&
+	test_cmp expected-committer actual-committer
+'
+
+test_expect_success 'committer.name overrides user.name' '
+	test_config user.name user &&
+	test_config user.email user@example.com &&
+	test_config committer.name committer &&
+	test_commit committer-name-override-user &&
+	echo user user@example.com > expected-author &&
+	echo committer user@example.com > expected-committer &&
+	git log --format="%an %ae" -1 > actual-author &&
+	git log --format="%cn %ce" -1 > actual-committer &&
+	test_cmp expected-author actual-author &&
+	test_cmp expected-committer actual-committer
+'
+
+test_expect_success 'committer.email overrides user.email' '
+	test_config user.name user &&
+	test_config user.email user@example.com &&
+	test_config committer.email committer@example.com &&
+	test_commit committer-email-override-user &&
+	echo user user@example.com > expected-author &&
+	echo user committer@example.com > expected-committer &&
+	git log --format="%an %ae" -1 > actual-author &&
+	git log --format="%cn %ce" -1 > actual-committer &&
+	test_cmp expected-author actual-author &&
+	test_cmp expected-committer actual-committer
+'
+
+test_expect_success 'author and committer environment variables override config settings' '
+	test_config user.name user &&
+	test_config user.email user@example.com &&
+	test_config author.name author &&
+	test_config author.email author@example.com &&
+	test_config committer.name committer &&
+	test_config committer.email committer@example.com &&
+	GIT_AUTHOR_NAME=env_author && export GIT_AUTHOR_NAME &&
+	GIT_AUTHOR_EMAIL=env_author@example.com && export GIT_AUTHOR_EMAIL &&
+	GIT_COMMITTER_NAME=env_commit && export GIT_COMMITTER_NAME &&
+	GIT_COMMITTER_EMAIL=env_commit@example.com && export GIT_COMMITTER_EMAIL &&
+	test_commit env-override-conf &&
+	echo env_author env_author@example.com > expected-author &&
+	echo env_commit env_commit@example.com > expected-committer &&
+	git log --format="%an %ae" -1 > actual-author &&
+	git log --format="%cn %ce" -1 > actual-committer &&
+	sane_unset GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL &&
+	sane_unset GIT_COMMITTER_NAME GIT_COMMITTER_EMAIL &&
+	test_cmp expected-author actual-author &&
+	test_cmp expected-committer actual-committer
+'
+
 test_done