X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2Fsupport%2Fos.cpp;h=616b9c6936d4a16594f239fbb2dc1d2332db1358;hb=cf14e814124ccbc8155fa1dde98d03be319c0e87;hp=ab9d4159a6cc8180864e760f330af3fc95bbb5d7;hpb=5e33e4fc2c02f92dec8918ade9d1e191d1d697b3;p=lyx.git

diff --git a/src/support/os.cpp b/src/support/os.cpp
index ab9d4159a6..616b9c6936 100644
--- a/src/support/os.cpp
+++ b/src/support/os.cpp
@@ -11,6 +11,10 @@
 
 #include <config.h>
 
+#ifdef _WIN32
+# define _WIN32_WINNT 0x0600
+#endif
+
 #include "support/convert.h"
 #include "support/debug.h"
 #include "support/filetools.h"
@@ -48,7 +52,7 @@ int timeout_min()
 
 static string const python23_call(string const & binary, bool verbose = false)
 {
-	const string version_info = " -c 'from __future__ import print_function;import sys; print(sys.version_info[:2], end=\"\")'";
+	const string version_info = " -c \"from __future__ import print_function;import sys; print(sys.version_info[:2], end=\\\"\\\")\"";
 	// Default to "python" if no binary is given.
 	if (binary.empty())
 		return "python -tt";
@@ -89,49 +93,76 @@ static string const find_python_binary()
 	// PEP 397 -- Python launcher for Windows
 	// https://www.python.org/dev/peps/pep-0397/
 
+#ifdef _WIN32
+	// Check through python launcher whether python 3 is
+	// installed on computer.
+	string command = python23_call("py -3");
+#else
 	// Check whether python3 in PATH is the right one.
 	string command = python23_call("python3");
+#endif // _WIN32
 	if (!command.empty())
 		return command;
 
+#ifndef _WIN32
 	// python3 does not exists, let us try to find python3.x in PATH
 	// the search is probably broader than required
 	// but we are trying hard to find a valid python binary
 	vector<string> const path = getEnvPath("PATH");
 	lyxerr << "Looking for python 3.x ...\n";
-	for (auto bin: path) {
+	for (auto bin : path) {
 		QString const dir = toqstr(bin);
 		string const localdir = dir.toLocal8Bit().constData();
 		QDir qdir(dir);
 		qdir.setFilter(QDir::Files | QDir::Executable);
 		QStringList list = qdir.entryList(QStringList("python3*"));
-		for (auto bin: list) {
-			string const binary = addName(localdir,
-				bin.toLocal8Bit().constData());
+		for (auto bin2 : list) {
+			string const binary = "\"" + addName(localdir,
+				bin2.toLocal8Bit().constData()) + "\"";
 			command = python23_call(binary, true);
 			if (!command.empty())
 				return command;
 		}
 	}
+#endif // !_WIN32
 
 	// python 3 was not found let us look for python 2
+#ifdef _WIN32
+	command = python23_call("py -2");
+#else
 	command = python23_call("python2");
+#endif // _WIN32
+	if (!command.empty())
+		return command;
+
+#ifdef _WIN32
+	// python launcher is not installed, let cmd auto check 
+	// PATH for a python.exe
+	command = python23_call("python");
 	if (!command.empty())
 		return command;
 
+	//failed, prepare to search PATH manually
+	vector<string> const path = getEnvPath("PATH");
+	lyxerr << "Manually looking for python in PATH ...\n";
+	QString const exeName = "python*";
+#else
 	// python2 does not exists, let us try to find python2.x in PATH
 	// the search is probably broader than required
 	// but we are trying hard to find a valid python binary
 	lyxerr << "Looking for python 2.x ...\n";
-	for (auto bin: path) {
+	QString const exeName = "python2*";
+#endif // _WIN32
+
+	for (auto bin : path) {
 		QString const dir = toqstr(bin);
 		string const localdir = dir.toLocal8Bit().constData();
 		QDir qdir(dir);
 		qdir.setFilter(QDir::Files | QDir::Executable);
-		QStringList list = qdir.entryList(QStringList("python2*"));
-		for (auto bin: list) {
-			string const binary = addName(localdir,
-				bin.toLocal8Bit().constData());
+		QStringList list = qdir.entryList(QStringList(exeName));
+		for (auto bin2 : list) {
+			string const binary = "\"" + addName(localdir,
+				bin2.toLocal8Bit().constData()) + "\"";
 			command = python23_call(binary, true);
 			if (!command.empty())
 				return command;