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setup: don't perform lazy initialization of repository state

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Under some circumstances (bogus GIT_DIR value or the discovered gitdir
is '.git') 'setup_git_directory()' won't initialize key repository
state.  This leads to inconsistent state after running the setup code.
To account for this inconsistent state, lazy initialization is done once
a caller asks for the repository's gitdir or some other piece of
repository state.  This is confusing and can be error prone.

Instead let's tighten the expected outcome of 'setup_git_directory()'
and ensure that it initializes repository state in all cases that would
have been handled by lazy initialization.

This also lets us drop the requirement to have 'have_git_dir()' check if
the environment variable GIT_DIR was set as that will be handled by the
end of the setup code.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Brandon Williams
2017-06-20 12:19:32 -07:00
committed by Junio C Hamano
parent 25bf951381
commit 73f192c991
3 changed files with 24 additions and 9 deletions
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17
environment.c
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@ -160,7 +160,7 @@ static char *git_path_from_env(const char *envvar, const char *git_dir,
return xstrdup(value);
}
static void setup_git_env(void)
void setup_git_env(void)
{
struct strbuf sb = STRBUF_INIT;
const char *gitfile;
@ -205,28 +205,27 @@ int is_bare_repository(void)
int have_git_dir(void)
{
return startup_info->have_repository
|| git_dir
|| getenv(GIT_DIR_ENVIRONMENT);
|| git_dir;
}
const char *get_git_dir(void)
{
if (!git_dir)
setup_git_env();
BUG("git environment hasn't been setup");
return git_dir;
}
const char *get_git_common_dir(void)
{
if (!git_dir)
setup_git_env();
BUG("git environment hasn't been setup");
return git_common_dir;
}
const char *get_git_namespace(void)
{
if (!namespace)
setup_git_env();
BUG("git environment hasn't been setup");
return namespace;
}
@ -276,7 +275,7 @@ const char *get_git_work_tree(void)
char *get_object_directory(void)
{
if (!git_object_dir)
setup_git_env();
BUG("git environment hasn't been setup");
return git_object_dir;
}
@ -316,14 +315,14 @@ int odb_pack_keep(const char *name)
char *get_index_file(void)
{
if (!git_index_file)
setup_git_env();
BUG("git environment hasn't been setup");
return git_index_file;
}
char *get_graft_file(void)
{
if (!git_graft_file)
setup_git_env();
BUG("git environment hasn't been setup");
return git_graft_file;
}