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/*
Copyright (C) 2013-2014 Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <vector>
#include <iostream>
#include <climits>
#include <cerrno>
#include <cstdlib>
#include <regex.h>
#include <glibmm/fileutils.h>
#include <glibmm/miscutils.h>
#include "pbd/compose.h"
#include "pbd/debug.h"
#include "pbd/pathexpand.h"
#include "pbd/strsplit.h"
#include "pbd/tokenizer.h"
using std::string;
using std::vector;
#ifdef COMPILER_MINGW
#include <stdio.h>
#include <stdlib.h>
#include <glibmm.h>
/****************************************************************
* Emulate POSIX realpath() using Win32 _fullpath() since realpath()
* is not available.
*
* Returns:
* On Success: A pointer to the resolved (absolute) path
* On Failure: 0 (NULL)
*/
static char*
realpath (const char *original_path, char resolved_path[_MAX_PATH+1])
{
char *rpath = 0;
bool bIsSymLink = false; // We'll probably need to test the incoming path
// to find out if it points to a Windows shortcut
// (or a hard link) and set this appropriately.
if (bIsSymLink) {
// At the moment I'm not sure if Windows '_fullpath()' is directly
// equivalent to POSIX 'realpath()' - in as much as the latter will
// resolve the supplied path if it happens to point to a symbolic
// link ('_fullpath()' probably DOESN'T do this but I'm not really
// sure if Ardour needs such functionality anyway). Therefore we'll
// possibly need to add that functionality here at a later date.
} else {
char temp[(_MAX_PATH+1)*6]; // Allow for maximum length of a path in wchar characters
// POSIX 'realpath()' requires that the buffer size is at
// least PATH_MAX+1, so assume that the user knew this !!
rpath = _fullpath (temp, Glib::locale_from_utf8 (original_path).c_str(), _MAX_PATH);
if (0 != rpath) {
snprintf (resolved_path, _MAX_PATH+1, "%s", Glib::locale_to_utf8 (temp).c_str());
}
}
return (rpath);
}
#endif // COMPILER_MINGW
string
PBD::canonical_path (const std::string& path)
{
char buf[PATH_MAX+1];
if (realpath (path.c_str(), buf) == NULL) {
DEBUG_TRACE (DEBUG::FileUtils,
string_compose("PBD::canonical_path: Unable to resolve %1: %2\n", path, g_strerror(errno)));
return path;
}
DEBUG_TRACE (DEBUG::FileUtils,
string_compose("PBD::canonical_path %1 resolved to: %2\n", path, string(buf)));
return string (buf);
}
string
PBD::path_expand (string path)
{
if (path.empty()) {
return path;
}
/* tilde expansion */
if (path[0] == '~') {
if (path.length() == 1) {
return Glib::get_home_dir();
}
if (path[1] == '/') {
path.replace (0, 1, Glib::get_home_dir());
} else {
/* can't handle ~roger, so just leave it */
}
}
/* now do $VAR substitution, since wordexp isn't reliable */
regex_t compiled_pattern;
const int nmatches = 100;
regmatch_t matches[nmatches];
if (regcomp (&compiled_pattern, "\\$([a-zA-Z_][a-zA-Z0-9_]*|\\{[a-zA-Z_][a-zA-Z0-9_]*\\})", REG_EXTENDED)) {
std::cerr << "bad regcomp\n";
return path;
}
while (true) {
if (regexec (&compiled_pattern, path.c_str(), nmatches, matches, 0)) {
break;
}
/* matches[0] gives the entire match */
string match = path.substr (matches[0].rm_so, matches[0].rm_eo - matches[0].rm_so);
/* try to get match from the environment */
if (match[1] == '{') {
/* ${FOO} form */
match = match.substr (2, match.length() - 3);
}
char* matched_value = getenv (match.c_str());
if (matched_value) {
path.replace (matches[0].rm_so, matches[0].rm_eo - matches[0].rm_so, matched_value);
} else {
path.replace (matches[0].rm_so, matches[0].rm_eo - matches[0].rm_so, string());
}
/* go back and do it again with whatever remains after the
* substitution
*/
}
regfree (&compiled_pattern);
/* canonicalize */
return canonical_path (path);
}
string
PBD::search_path_expand (string path)
{
if (path.empty()) {
return path;
}
vector<string> s;
vector<string> n;
split (path, s, G_SEARCHPATH_SEPARATOR);
for (vector<string>::iterator i = s.begin(); i != s.end(); ++i) {
string exp = path_expand (*i);
if (!exp.empty()) {
n.push_back (exp);
}
}
string r;
for (vector<string>::iterator i = n.begin(); i != n.end(); ++i) {
if (!r.empty()) {
r += G_SEARCHPATH_SEPARATOR;
}
r += *i;
}
return r;
}
std::vector <std::string>
PBD::parse_path(std::string path, bool check_if_exists)
{
vector <std::string> pathlist;
vector <std::string> tmp;
PBD::tokenize (path, string(G_SEARCHPATH_SEPARATOR_S), std::back_inserter (tmp));
for(vector<std::string>::const_iterator i = tmp.begin(); i != tmp.end(); ++i) {
if ((*i).empty()) continue;
std::string dir;
#ifndef PLATFORM_WINDOWS
if ((*i).substr(0,1) == "~") {
dir = Glib::build_filename(Glib::get_home_dir(), (*i).substr(1));
}
else
#endif
{
dir = *i;
}
if (!check_if_exists || Glib::file_test (dir, Glib::FILE_TEST_IS_DIR)) {
pathlist.push_back(dir);
}
}
return pathlist;
}
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