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// Copyright © 2016 Alexandre Detiste <alexandre@detiste.be>
// SPDX-License-Identifier: GPL-2.0-or-later
#include <algorithm>
#include <cstring>
#include <iostream>
#include <dirent.h>
#include <sys/stat.h>
#include "python.h"
#ifdef BUSTER
#include <experimental/string_view>
using namespace std::experimental;
#endif
using namespace std;
vector<string> versions;
void init_python()
{
DIR *dp;
struct dirent *dirp;
dp = opendir("/usr/bin");
while ((dirp = readdir(dp)) != nullptr) {
string entry { dirp->d_name };
if (entry.rfind("python3.") == 0 && entry.find("-") == string::npos) {
string pyc_ver = "3" + entry.substr(8);
versions.emplace_back(pyc_ver);
}
}
closedir(dp);
sort(versions.begin(), versions.end());
}
static bool ends_with(string_view str, string_view suffix)
{
if (suffix.size() > str.size())
return false;
return std::equal(suffix.rbegin(), suffix.rend(), str.rbegin());
}
bool pyc_has_py(string pyc, bool debug)
{
if (pyc.length() < 15)
return false;
// #366616: Don't report .pyc files if a .py file exist
// also ignore __pycache__ dirs
// if .py are found in the same directory
if (ends_with(pyc, "/__pycache__")) {
string dir;
DIR *dp;
struct dirent *dirp;
dir = pyc.substr(0, pyc.length()-12);
dp = opendir(dir.c_str());
if(dp == nullptr) {
cerr << "Failed to open directory " << dir << ": " << strerror(errno) << endl;
return false;
}
while ((dirp = readdir(dp)) != nullptr) {
string_view entry { dirp->d_name };
if (entry.length() < 4)
continue;
//cerr << ' ' << entry << endl;
if (ends_with(entry, ".py")) {
if (debug) cerr << "match: " << dir << '/' << entry << endl;
closedir(dp);
return true;
}
}
closedir(dp);
return false;
}
if (!ends_with(pyc, ".pyc"))
return false;
struct stat buffer;
#ifdef BUSTER
// python2 support
string py;
py = pyc.substr(0, pyc.length()-1);
if (stat(py.c_str(), &buffer) == 0) {
if (debug) cerr << "match: " << py << endl;
return true;
}
#endif
/* TODO: consider old .pyc from old uinstalled Python3.x as leftover garbage
$ py3versions -s
python3.11
tchet@brix ~/git/cruft-ng $ grep ^supported-versions /usr/share/python3/debian_defaults
supported-versions = python3.11
take 3.11 as a baseline but also support the next expected version 3.12
$ ls /usr/bin/python3\.* | grep 3\.[0-9]*$
/usr/bin/python3.11
/usr/bin/python3.12
*/
/*
/usr/share/pgcli/pgcli/packages/counter.py
/usr/share/pgcli/pgcli/packages/__pycache__/counter.cpython-34.pyc
*/
size_t pos = pyc.find("/__pycache__/");
if (pos == string::npos)
return false;
pyc.replace(pos, 13, "/");
pos = pyc.find(".cpython-");
if (pos == string::npos)
return false;
bool installed = false;
int offset;
for (unsigned int i=0;i<versions.size();i++) {
if(pyc.find(versions[i], pos) != string::npos) {
installed = true;
offset = 13 + versions[i].length();
break;
}
}
if (!installed) return false;
pyc.replace(pos, offset, ".py");
bool matched;
matched = (stat(pyc.c_str(), &buffer) == 0);
if (matched && debug) cerr << "match: " << pyc << endl;
return matched;
}
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