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setup: split off $GIT_DIR-set case from setup_git_directory_gently

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If $GIT_DIR is set, setup_git_directory_gently does not have
to do any repository discovery at all.  Split off a function
for the validation it still does do, in the hope that this will
make setup_git_directory_gently proper less daunting to read.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jonathan Nieder 2010-07-24 06:19:44 -05:00 committed by Junio C Hamano
parent 9f41a91a7d
commit e4e303479b
1 changed files with 37 additions and 32 deletions
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69
setup.c
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@ -313,6 +313,41 @@ const char *read_gitfile_gently(const char *path)
return path;
}
static const char *setup_explicit_git_dir(const char *gitdirenv,
const char *work_tree_env, int *nongit_ok)
{
static char buffer[1024 + 1];
const char *retval;
if (PATH_MAX - 40 < strlen(gitdirenv))
die("'$%s' too big", GIT_DIR_ENVIRONMENT);
if (!is_git_directory(gitdirenv)) {
if (nongit_ok) {
*nongit_ok = 1;
return NULL;
}
die("Not a git repository: '%s'", gitdirenv);
}
if (!work_tree_env) {
retval = set_work_tree(gitdirenv);
/* config may override worktree */
if (check_repository_format_gently(nongit_ok))
return NULL;
return retval;
}
if (check_repository_format_gently(nongit_ok))
return NULL;
retval = get_relative_cwd(buffer, sizeof(buffer) - 1,
get_git_work_tree());
if (!retval || !*retval)
return NULL;
set_git_dir(make_absolute_path(gitdirenv));
if (chdir(work_tree_env) < 0)
die_errno ("Could not chdir to '%s'", work_tree_env);
strcat(buffer, "/");
return retval;
}
/*
* We cannot decide in this function whether we are in the work tree or
* not, since the config can only be read _after_ this function was called.
@ -343,38 +378,8 @@ const char *setup_git_directory_gently(int *nongit_ok)
* validation.
*/
gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
if (gitdirenv) {
if (PATH_MAX - 40 < strlen(gitdirenv))
die("'$%s' too big", GIT_DIR_ENVIRONMENT);
if (is_git_directory(gitdirenv)) {
static char buffer[1024 + 1];
const char *retval;
if (!work_tree_env) {
retval = set_work_tree(gitdirenv);
/* config may override worktree */
if (check_repository_format_gently(nongit_ok))
return NULL;
return retval;
}
if (check_repository_format_gently(nongit_ok))
return NULL;
retval = get_relative_cwd(buffer, sizeof(buffer) - 1,
get_git_work_tree());
if (!retval || !*retval)
return NULL;
set_git_dir(make_absolute_path(gitdirenv));
if (chdir(work_tree_env) < 0)
die_errno ("Could not chdir to '%s'", work_tree_env);
strcat(buffer, "/");
return retval;
}
if (nongit_ok) {
*nongit_ok = 1;
return NULL;
}
die("Not a git repository: '%s'", gitdirenv);
}
if (gitdirenv)
return setup_explicit_git_dir(gitdirenv, work_tree_env, nongit_ok);
if (!getcwd(cwd, sizeof(cwd)-1))
die_errno("Unable to read current working directory");