mirror of
https://git.lyx.org/repos/lyx.git
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110 lines
2.7 KiB
C++
110 lines
2.7 KiB
C++
/**
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* \file os.cpp
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Ruurd A. Reitsma
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* \author Enrico Forestieri
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*
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* Full author contact details are available in file CREDITS.
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*/
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#include <config.h>
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#include "support/debug.h"
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#include "support/filetools.h"
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#include "support/qstring_helpers.h"
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#include <QDir>
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#if defined(__CYGWIN__)
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#include "support/os_cygwin.cpp"
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#elif defined(_WIN32)
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#include "support/os_win32.cpp"
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#else
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#include "support/os_unix.cpp"
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#endif
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// Static assert to break compilation on platforms where
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// int/unsigned int is not 4 bytes. Added to make sure that
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// e.g., the author hash is always 32-bit.
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template<bool Condition> struct static_assert_helper;
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template <> struct static_assert_helper<true> {};
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enum {
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dummy = sizeof(static_assert_helper<sizeof(int) == 4>)
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};
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namespace lyx {
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namespace support {
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namespace os {
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static string const python23(string const & binary, bool verbose = false)
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{
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if (verbose)
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lyxerr << "Examining " << binary << "\n";
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// Check whether this is a python 2 or 3 binary.
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cmd_ret const out = runCommand(binary + " -V 2>&1");
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if (out.first < 0 ||
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(!prefixIs(out.second, "Python 2") &&
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!prefixIs(out.second, "Python 3")))
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return string();
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if (verbose)
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lyxerr << "Found " << out.second << "\n";
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return binary;
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}
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int timeout_min()
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{
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return 3;
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}
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string const python(bool reset)
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{
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// Check whether the first python in PATH is the right one.
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static string command = python23("python -tt");
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// FIXME THREAD
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if (reset) {
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command = python23("python -tt");
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}
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if (command.empty()) {
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// It was not, so check whether we can find it elsewhere in
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// PATH, maybe with some suffix appended.
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vector<string> const path = getEnvPath("PATH");
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vector<string>::const_iterator it = path.begin();
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vector<string>::const_iterator const end = path.end();
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lyxerr << "Looking for python v2.x or 3.x ...\n";
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for (; it != end; ++it) {
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QString const dir = toqstr(*it);
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string const localdir = dir.toLocal8Bit().constData();
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QDir qdir(dir);
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qdir.setFilter(QDir::Files | QDir::Executable);
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QStringList list = qdir.entryList(QStringList("python*"));
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for (int i = 0; i < list.size() && command.empty(); ++i) {
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string const binary = addName(localdir,
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list.at(i).toLocal8Bit().constData());
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command = python23(binary, true);
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}
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}
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// Default to "python" if no usable binary was found.
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if (command.empty()) {
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lyxerr << "Warning: No python v2.x or 3.x binary found.\n";
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command = "python";
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}
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// Add the -tt switch so that mixed tab/whitespace
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// indentation is an error
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command += " -tt";
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}
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return command;
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}
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} // namespace os
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} // namespace support
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} // namespace lyx
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