bool autoload_t::can_load(const wcstring &cmd, const env_vars_snapshot_t &vars) {
const env_var_t path_var = vars.get(env_var_name);
if (path_var.missing_or_empty()) return false;
std::vector<wcstring> path_list;
tokenize_variable_array(path_var, path_list);
return this->locate_file_and_maybe_load_it(cmd, false, false, path_list);
}
bool path_get_path(const wcstring &cmd, wcstring *out_path, const env_vars_snapshot_t &vars) {
return path_get_path_core(cmd, out_path, vars.get(L"PATH"));
}
bool path_get_cdpath(const wcstring &dir, wcstring *out, const wchar_t *wd,
const env_vars_snapshot_t &env_vars) {
int err = ENOENT;
if (dir.empty()) return false;
if (wd) {
size_t len = wcslen(wd);
assert(wd[len - 1] == L'/');
}
wcstring_list_t paths;
if (dir.at(0) == L'/') {
// Absolute path.
paths.push_back(dir);
} else if (string_prefixes_string(L"./", dir) || string_prefixes_string(L"../", dir) ||
dir == L"." || dir == L"..") {
// Path is relative to the working directory.
wcstring path;
if (wd) path.append(wd);
path.append(dir);
paths.push_back(path);
} else {
// Respect CDPATH.
env_var_t path = env_vars.get(L"CDPATH");
if (path.missing_or_empty()) path = L"."; // we'll change this to the wd if we have one
wcstring nxt_path;
wcstokenizer tokenizer(path, ARRAY_SEP_STR);
while (tokenizer.next(nxt_path)) {
if (nxt_path == L"." && wd != NULL) {
// nxt_path is just '.', and we have a working directory, so use the wd instead.
// TODO: if nxt_path starts with ./ we need to replace the . with the wd.
nxt_path = wd;
}
expand_tilde(nxt_path);
// debug( 2, L"woot %ls\n", expanded_path.c_str() );
if (nxt_path.empty()) continue;
wcstring whole_path = nxt_path;
append_path_component(whole_path, dir);
paths.push_back(whole_path);
}
}
bool success = false;
for (wcstring_list_t::const_iterator iter = paths.begin(); iter != paths.end(); ++iter) {
struct stat buf;
const wcstring &dir = *iter;
if (wstat(dir, &buf) == 0) {
if (S_ISDIR(buf.st_mode)) {
success = true;
if (out) out->assign(dir);
break;
} else {
err = ENOTDIR;
}
}
}
if (!success) errno = err;
return success;
}
