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read_early_config(): really discover .git/

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Earlier, we punted and simply assumed that we are in the top-level
directory of the project, and that there is no .git file but a .git/
directory so that we can read directly from .git/config.

However, that is not necessarily true. We may be in a subdirectory. Or
.git may be a gitfile. Or the environment variable GIT_DIR may be set.

To remedy this situation, we just refactored the way
setup_git_directory() discovers the .git/ directory, to make it
reusable, and more importantly, to leave all global variables and the
current working directory alone.

Let's discover the .git/ directory correctly in read_early_config() by
using that new function.

This fixes 4 known breakages in t7006.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Johannes Schindelin 2017-03-13 21:11:12 +01:00 committed by Junio C Hamano
parent 267b4538c0
commit 1a27409ae8
2 changed files with 16 additions and 23 deletions
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31
config.c
View File

@ -1414,34 +1414,27 @@ static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
void read_early_config(config_fn_t cb, void *data)
{
struct strbuf buf = STRBUF_INIT;
git_config_with_options(cb, data, NULL, 1);
/*
* Note that this is a really dirty hack that does the wrong thing in
* many cases. The crux of the problem is that we cannot run
* setup_git_directory() early on in git's setup, so we have no idea if
* we are in a repository or not, and therefore are not sure whether
* and how to read repository-local config.
*
* So if we _aren't_ in a repository (or we are but we would reject its
* core.repositoryformatversion), we'll read whatever is in .git/config
* blindly. Similarly, if we _are_ in a repository, but not at the
* root, we'll fail to find .git/config (because it's really
* ../.git/config, etc), unless setup_git_directory() was already called.
* See t7006 for a complete set of failures.
*
* However, we have historically provided this hack because it does
* work some of the time (namely when you are at the top-level of a
* valid repository), and would rarely make things worse (i.e., you do
* not generally have a .git/config file sitting around).
* When setup_git_directory() was not yet asked to discover the
* GIT_DIR, we ask discover_git_directory() to figure out whether there
* is any repository config we should use (but unlike
* setup_git_directory_gently(), no global state is changed, most
* notably, the current working directory is still the same after the
* call).
*/
if (!have_git_dir()) {
if (!have_git_dir() && discover_git_directory(&buf)) {
struct git_config_source repo_config;
memset(&repo_config, 0, sizeof(repo_config));
repo_config.file = ".git/config";
strbuf_addstr(&buf, "/config");
repo_config.file = buf.buf;
git_config_with_options(cb, data, &repo_config, 1);
}
strbuf_release(&buf);
}
static void git_config_check_init(void);

8
t/t7006-pager.sh
View File

@ -360,19 +360,19 @@ test_pager_choices 'git aliasedlog'
test_default_pager expect_success 'git -p aliasedlog'
test_PAGER_overrides expect_success 'git -p aliasedlog'
test_core_pager_overrides expect_success 'git -p aliasedlog'
test_core_pager_subdir expect_failure 'git -p aliasedlog'
test_core_pager_subdir expect_success 'git -p aliasedlog'
test_GIT_PAGER_overrides expect_success 'git -p aliasedlog'
test_default_pager expect_success 'git -p true'
test_PAGER_overrides expect_success 'git -p true'
test_core_pager_overrides expect_success 'git -p true'
test_core_pager_subdir expect_failure 'git -p true'
test_core_pager_subdir expect_success 'git -p true'
test_GIT_PAGER_overrides expect_success 'git -p true'
test_default_pager expect_success test_must_fail 'git -p request-pull'
test_PAGER_overrides expect_success test_must_fail 'git -p request-pull'
test_core_pager_overrides expect_success test_must_fail 'git -p request-pull'
test_core_pager_subdir expect_failure test_must_fail 'git -p request-pull'
test_core_pager_subdir expect_success test_must_fail 'git -p request-pull'
test_GIT_PAGER_overrides expect_success test_must_fail 'git -p request-pull'
test_default_pager expect_success test_must_fail 'git -p'
@ -380,7 +380,7 @@ test_PAGER_overrides expect_success test_must_fail 'git -p'
test_local_config_ignored expect_failure test_must_fail 'git -p'
test_GIT_PAGER_overrides expect_success test_must_fail 'git -p'
test_expect_failure TTY 'core.pager in repo config works and retains cwd' '
test_expect_success TTY 'core.pager in repo config works and retains cwd' '
sane_unset GIT_PAGER &&
test_config core.pager "cat >cwd-retained" &&
(