139 lines
3.2 KiB
C++
139 lines
3.2 KiB
C++
/*
|
|
Copyright (C) 2013 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 <climits>
|
|
#include <iostream>
|
|
|
|
#include <regex.h>
|
|
|
|
#include <glibmm/miscutils.h>
|
|
|
|
#include "pbd/pathexpand.h"
|
|
#include "pbd/strsplit.h"
|
|
|
|
using std::string;
|
|
using std::vector;
|
|
|
|
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 */
|
|
|
|
char buf[PATH_MAX+1];
|
|
|
|
if (realpath (path.c_str(), buf)) {
|
|
return buf;
|
|
} else {
|
|
return string();
|
|
}
|
|
}
|
|
|
|
string
|
|
PBD::search_path_expand (string path)
|
|
{
|
|
if (path.empty()) {
|
|
return path;
|
|
}
|
|
|
|
vector<string> s;
|
|
vector<string> n;
|
|
|
|
split (path, s, ':');
|
|
|
|
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 += ':';
|
|
}
|
|
r += *i;
|
|
}
|
|
|
|
return r;
|
|
}
|