167 lines
4.1 KiB
C++
167 lines
4.1 KiB
C++
/*
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* Copyright (C) 2013-2014 John Emmas <john@creativepost.co.uk>
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* Copyright (C) 2013-2015 Paul Davis <paul@linuxaudiosystems.com>
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* Copyright (C) 2013-2016 Tim Mayberry <mojofunk@gmail.com>
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* Copyright (C) 2014-2015 Robin Gareus <robin@gareus.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <vector>
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#include <iostream>
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#include <climits>
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#include <cerrno>
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#include <cstdlib>
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#include <regex.h>
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#include <glibmm/fileutils.h>
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#include <glibmm/miscutils.h>
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#include "pbd/compose.h"
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#include "pbd/debug.h"
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#include "pbd/pathexpand.h"
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#include "pbd/strsplit.h"
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#include "pbd/tokenizer.h"
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using std::string;
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using std::vector;
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string
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PBD::path_expand (string path)
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{
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if (path.empty()) {
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return path;
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}
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/* tilde expansion */
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if (path[0] == '~') {
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if (path.length() == 1) {
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return Glib::get_home_dir();
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}
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if (path[1] == '/') {
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path.replace (0, 1, Glib::get_home_dir());
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} else {
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/* can't handle ~roger, so just leave it */
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}
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}
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/* now do $VAR substitution, since wordexp isn't reliable */
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regex_t compiled_pattern;
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const int nmatches = 100;
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regmatch_t matches[nmatches];
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if (regcomp (&compiled_pattern, "\\$([a-zA-Z_][a-zA-Z0-9_]*|\\{[a-zA-Z_][a-zA-Z0-9_]*\\})", REG_EXTENDED)) {
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std::cerr << "bad regcomp\n";
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return path;
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}
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while (true) {
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if (regexec (&compiled_pattern, path.c_str(), nmatches, matches, 0)) {
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break;
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}
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/* matches[0] gives the entire match */
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string match = path.substr (matches[0].rm_so, matches[0].rm_eo - matches[0].rm_so);
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/* try to get match from the environment */
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if (match[1] == '{') {
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/* ${FOO} form */
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match = match.substr (2, match.length() - 3);
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}
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char* matched_value = getenv (match.c_str());
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if (matched_value) {
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path.replace (matches[0].rm_so, matches[0].rm_eo - matches[0].rm_so, matched_value);
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} else {
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path.replace (matches[0].rm_so, matches[0].rm_eo - matches[0].rm_so, string());
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}
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/* go back and do it again with whatever remains after the
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* substitution
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*/
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}
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regfree (&compiled_pattern);
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/* canonicalize */
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return canonical_path (path);
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}
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string
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PBD::search_path_expand (string path)
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{
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if (path.empty()) {
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return path;
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}
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vector<string> s;
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vector<string> n;
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split (path, s, G_SEARCHPATH_SEPARATOR);
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for (vector<string>::iterator i = s.begin(); i != s.end(); ++i) {
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string exp = path_expand (*i);
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if (!exp.empty()) {
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n.push_back (exp);
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}
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}
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string r;
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for (vector<string>::iterator i = n.begin(); i != n.end(); ++i) {
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if (!r.empty()) {
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r += G_SEARCHPATH_SEPARATOR;
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}
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r += *i;
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}
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return r;
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}
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std::vector <std::string>
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PBD::parse_path(std::string path, bool check_if_exists)
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{
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vector <std::string> pathlist;
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vector <std::string> tmp;
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PBD::tokenize (path, string(G_SEARCHPATH_SEPARATOR_S), std::back_inserter (tmp));
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for(vector<std::string>::const_iterator i = tmp.begin(); i != tmp.end(); ++i) {
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if ((*i).empty()) continue;
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std::string dir;
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#ifndef PLATFORM_WINDOWS
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if ((*i).substr(0,1) == "~") {
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dir = Glib::build_filename(Glib::get_home_dir(), (*i).substr(1));
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}
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else
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#endif
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{
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dir = *i;
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}
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if (!check_if_exists || Glib::file_test (dir, Glib::FILE_TEST_IS_DIR)) {
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pathlist.push_back(dir);
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}
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}
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return pathlist;
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}
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