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config: respect commondir 

Worktrees present an interesting problem when it comes to the config.
Historically we could assume that the per-repository config lives at
'gitdir/config', but since worktrees were introduced this isn't the case
anymore.  There is currently no way to specify per-worktree
configuration, and as such the repository config is shared with all
worktrees and is located at 'commondir/config'.

Many users of the config machinery correctly set
'config_options.git_dir' with the repository's commondir, allowing the
config to be properly loaded when operating in a worktree.  But other's,
like 'read_early_config()', set 'config_options.git_dir' with the
repository's gitdir which can be incorrect when using worktrees.

To fix this issue, and to make things less ambiguous, lets add a
'commondir' field to the 'config_options' struct and have all callers
properly set both the 'git_dir' and 'commondir' fields so that the
config machinery is able to properly find the repository's config.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Brandon Williams 2017-06-14 11:07:38 -07:00 committed by Junio C Hamano
parent d3fb71b3cb
commit a577fb5fdc
2 changed files with 8 additions and 4 deletions
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11
config.c
View File

@ -1531,8 +1531,8 @@ static int do_git_config_sequence(const struct config_options *opts,
char *user_config = expand_user_path("~/.gitconfig", 0);
char *repo_config;
if (opts->git_dir)
repo_config = mkpathdup("%s/config", opts->git_dir);
if (opts->commondir)
repo_config = mkpathdup("%s/config", opts->commondir);
else if (have_git_dir())
repo_config = git_pathdup("config");
else
@ -1644,7 +1644,8 @@ void read_early_config(config_fn_t cb, void *data)
opts.respect_includes = 1;
if (have_git_dir())
if (have_git_dir()) {
opts.commondir = get_git_common_dir();
opts.git_dir = get_git_dir();
/*
* When setup_git_directory() was not yet asked to discover the
@ -1654,8 +1655,10 @@ void read_early_config(config_fn_t cb, void *data)
* notably, the current working directory is still the same after the
* call).
*/
else if (!discover_git_directory(&commondir, &gitdir))
} else if (!discover_git_directory(&commondir, &gitdir)) {
opts.commondir = commondir.buf;
opts.git_dir = gitdir.buf;
}
git_config_with_options(cb, data, NULL, &opts);

1
config.h
View File

@ -30,6 +30,7 @@ enum config_origin_type {
struct config_options {
unsigned int respect_includes : 1;
const char *commondir;
const char *git_dir;
};