config: complain about --local outside of a git repo

The "--local" option instructs git-config to read or modify
the repository-level config. This doesn't make any sense if
you're not actually in a repository.

Older versions of Git would blindly try to read or write
".git/config". For reading, this would result in a quiet
failure, since there was no config to read (and thus no
matching config value). Writing would generally fail
noisily, since ".git" was unlikely to exist. But since
b1ef400ee (setup_git_env: avoid blind fall-back to ".git",
2016-10-20), we catch this in the call to git_pathdup() and
die with an assertion.

Dying is the right thing to do, but we should catch the
problem early and give a more human-friendly error message.

Note that even without --local, git-config will sometimes
default to using local repository config (e.g., when
writing). These cases are already protected by similar
checks, and covered by a test in t1308.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2017-05-12 23:29:31 -04:00 committed by Junio C Hamano
parent 588a538ae5
commit 25cd291963
2 changed files with 4 additions and 1 deletions

View File

@ -496,6 +496,9 @@ int cmd_config(int argc, const char **argv, const char *prefix)
usage_with_options(builtin_config_usage, builtin_config_options); usage_with_options(builtin_config_usage, builtin_config_options);
} }
if (use_local_config && nongit)
die(_("--local can only be used inside a git repository"));
if (given_config_source.file && if (given_config_source.file &&
!strcmp(given_config_source.file, "-")) { !strcmp(given_config_source.file, "-")) {
given_config_source.file = NULL; given_config_source.file = NULL;

View File

@ -1539,7 +1539,7 @@ test_expect_success !MINGW '--show-origin blob ref' '
test_cmp expect output test_cmp expect output
' '
test_expect_failure '--local requires a repo' ' test_expect_success '--local requires a repo' '
# we expect 128 to ensure that we do not simply # we expect 128 to ensure that we do not simply
# fail to find anything and return code "1" # fail to find anything and return code "1"
test_expect_code 128 nongit git config --local foo.bar test_expect_code 128 nongit git config --local foo.bar