Fix setting config variables with an alternative GIT_CONFIG

When setting a config variable, git_config_set() ignored the variables
GIT_CONFIG and GIT_CONFIG_LOCAL. Now, when GIT_CONFIG_LOCAL is set, it
will write to that file. If not, GIT_CONFIG is checked, and only as a
fallback, the change is written to $GIT_DIR/config.

Add a test for it, and also future-proof the test for the upcoming
$HOME/.gitconfig support.

Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/config.c b/config.c
index d46eb6d8293766c2c188a1f89891329e4db06d93..37862d429f473d974a53d55315a23683d25aa3cb 100644 (file)
--- a/config.c
+++ b/config.c
@@ -500,10 +500,19 @@ int git_config_set_multivar(const char* key, const char* value,
        int i, dot;
        int fd = -1, in_fd;
        int ret;
-       char* config_filename = strdup(git_path("config"));
-       char* lock_file = strdup(git_path("config.lock"));
+       char* config_filename;
+       char* lock_file;
        const char* last_dot = strrchr(key, '.');
 
+       config_filename = getenv("GIT_CONFIG");
+       if (!config_filename) {
+               config_filename = getenv("GIT_CONFIG_LOCAL");
+               if (!config_filename)
+                       config_filename  = git_path("config");
+       }
+       config_filename = strdup(config_filename);
+       lock_file = strdup(mkpath("%s.lock", config_filename));
+
        /*
         * Since "key" actually contains the section name and the real
         * key name separated by a dot, we have to know where the dot is.
@@ -610,7 +619,7 @@ int git_config_set_multivar(const char* key, const char* value,
                 * As a side effect, we make sure to transform only a valid
                 * existing config file.
                 */
-               if (git_config(store_aux)) {
+               if (git_config_from_file(store_aux, config_filename)) {
                        fprintf(stderr, "invalid config file\n");
                        free(store.key);
                        if (store.value_regex != NULL) {

diff --git a/t/Makefile b/t/Makefile
index 549598575b9fdcefe857ddef1b6d980a9773b033..632c55f6d5d66c8e39e213284e163a23b32c2260 100644 (file)
--- a/t/Makefile
+++ b/t/Makefile
@@ -19,7 +19,7 @@ endif
 all: $(T) clean
 
 $(T):
-       @echo "*** $@ ***"; '$(SHELL_PATH_SQ)' $@ $(GIT_TEST_OPTS)
+       @echo "*** $@ ***"; GIT_CONFIG=.git/config '$(SHELL_PATH_SQ)' $@ $(GIT_TEST_OPTS)
 
 clean:
        rm -fr trash

diff --git a/t/t1300-repo-config.sh b/t/t1300-repo-config.sh
index 8260d57b63d7f988a4c236d99ce2c9931a67c5e3..0de2497746e31f3dce418dbd248ff5d3e7cb939a 100755 (executable)
--- a/t/t1300-repo-config.sh
+++ b/t/t1300-repo-config.sh
@@ -309,5 +309,29 @@ EOF
 
 test_expect_success 'new variable inserts into proper section' 'cmp .git/config expect'
 
+cat > other-config << EOF
+[ein]
+       bahn = strasse
+EOF
+
+cat > expect << EOF
+ein.bahn=strasse
+EOF
+
+GIT_CONFIG=other-config git-repo-config -l > output
+
+test_expect_success 'alternative GIT_CONFIG' 'cmp output expect'
+
+GIT_CONFIG=other-config git-repo-config anwohner.park ausweis
+
+cat > expect << EOF
+[ein]
+       bahn = strasse
+[anwohner]
+       park = ausweis
+EOF
+
+test_expect_success '--set in alternative GIT_CONFIG' 'cmp other-config expect'
+
 test_done