SL-15742: Convert build scripts to Python 3

This changeset makes it possible to build the Second Life viewer using
Python 3. It is designed to be used with an equivalent Autobuild branch
so that a developer can compile without needing Python 2 on their
machine.

Breaking change: Python 2 support ending

Rather than supporting two versions of Python, including one that was
discontinued at the beginning of the year, this branch focuses on
pouring future effort into Python 3 only. As a result, scripts do not
need to be backwards compatible. This means that build environments,
be they on personal computers and on build agents, need to have a
compatible interpreter.

Notes

- SLVersionChecker will still use Python 2 on macOS
- Fixed the message template url used by template_verifier.py

1 files changed, 17 insertions, 13 deletions

diff --git a/indra/llcommon/tests/llprocess_test.cpp b/indra/llcommon/tests/llprocess_test.cpp
index f0eafa8201..e530975e86 100644
--- a/indra/llcommon/tests/llprocess_test.cpp
+++ b/indra/llcommon/tests/llprocess_test.cpp
@@ -360,10 +360,10 @@ namespace tut
             "import time" EOL
             EOL
             "time.sleep(2)" EOL
-            "print >>sys.stdout, 'stdout after wait'" EOL
+            "print('stdout after wait', file=sys.stdout)" EOL
             "sys.stdout.flush()" EOL
             "time.sleep(2)" EOL
-            "print >>sys.stderr, 'stderr after wait'" EOL
+            "print('stderr after wait', file=sys.stderr)" EOL
             "sys.stderr.flush()" EOL
             );
 
@@ -381,7 +381,11 @@ namespace tut
 
         std::vector<const char*> argv;
         apr_proc_t child;
+#if defined(LL_WINDOWS)
         argv.push_back("python");
+#else
+        argv.push_back("python3");
+#endif
         // Have to have a named copy of this std::string so its c_str() value
         // will persist.
         std::string scriptname(script.getName());
@@ -573,7 +577,7 @@ namespace tut
                                  // note nonstandard output-file arg!
                                  "with open(sys.argv[3], 'w') as f:\n"
                                  "    for arg in sys.argv[1:]:\n"
-                                 "        print >>f, arg\n");
+                                 "        print(arg, file=f)\n");
         // We expect that PythonProcessLauncher has already appended
         // its own NamedTempFile to mParams.args (sys.argv[0]).
         py.mParams.args.add("first arg");          // sys.argv[1]
@@ -742,7 +746,7 @@ namespace tut
                                      "with open(sys.argv[1], 'w') as f:\n"
                                      "    f.write('ok')\n"
                                      "# wait for 'go' from test program\n"
-                                     "for i in xrange(60):\n"
+                                     "for i in range(60):\n"
                                      "    time.sleep(1)\n"
                                      "    with open(sys.argv[2]) as f:\n"
                                      "        go = f.read()\n"
@@ -804,7 +808,7 @@ namespace tut
                                      "with open(sys.argv[1], 'w') as f:\n"
                                      "    f.write('ok')\n"
                                      "# wait for 'go' from test program\n"
-                                     "for i in xrange(60):\n"
+                                     "for i in range(60):\n"
                                      "    time.sleep(1)\n"
                                      "    with open(sys.argv[2]) as f:\n"
                                      "        go = f.read()\n"
@@ -857,7 +861,7 @@ namespace tut
         set_test_name("'bogus' test");
         CaptureLog recorder;
         PythonProcessLauncher py(get_test_name(),
-                                 "print 'Hello world'\n");
+                                 "print('Hello world')\n");
         py.mParams.files.add(LLProcess::FileParam("bogus"));
         py.mPy = LLProcess::create(py.mParams);
         ensure("should have rejected 'bogus'", ! py.mPy);
@@ -872,7 +876,7 @@ namespace tut
         // Replace this test with one or more real 'file' tests when we
         // implement 'file' support
         PythonProcessLauncher py(get_test_name(),
-                                 "print 'Hello world'\n");
+                                 "print('Hello world')\n");
         py.mParams.files.add(LLProcess::FileParam());
         py.mParams.files.add(LLProcess::FileParam("file"));
         py.mPy = LLProcess::create(py.mParams);
@@ -887,7 +891,7 @@ namespace tut
         // implement 'tpipe' support
         CaptureLog recorder;
         PythonProcessLauncher py(get_test_name(),
-                                 "print 'Hello world'\n");
+                                 "print('Hello world')\n");
         py.mParams.files.add(LLProcess::FileParam());
         py.mParams.files.add(LLProcess::FileParam("tpipe"));
         py.mPy = LLProcess::create(py.mParams);
@@ -904,7 +908,7 @@ namespace tut
         // implement 'npipe' support
         CaptureLog recorder;
         PythonProcessLauncher py(get_test_name(),
-                                 "print 'Hello world'\n");
+                                 "print('Hello world')\n");
         py.mParams.files.add(LLProcess::FileParam());
         py.mParams.files.add(LLProcess::FileParam());
         py.mParams.files.add(LLProcess::FileParam("npipe"));
@@ -980,7 +984,7 @@ namespace tut
     {
         set_test_name("get*Pipe() validation");
         PythonProcessLauncher py(get_test_name(),
-                                 "print 'this output is expected'\n");
+                                 "print('this output is expected)'\n");
         py.mParams.files.add(LLProcess::FileParam("pipe")); // pipe for  stdin
         py.mParams.files.add(LLProcess::FileParam());       // inherit stdout
         py.mParams.files.add(LLProcess::FileParam("pipe")); // pipe for stderr
@@ -1001,13 +1005,13 @@ namespace tut
         set_test_name("talk to stdin/stdout");
         PythonProcessLauncher py(get_test_name(),
                                  "import sys, time\n"
-                                 "print 'ok'\n"
+                                 "print('ok')\n"
                                  "sys.stdout.flush()\n"
                                  "# wait for 'go' from test program\n"
                                  "go = sys.stdin.readline()\n"
                                  "if go != 'go\\n':\n"
                                  "    sys.exit('expected \"go\", saw %r' % go)\n"
-                                 "print 'ack'\n");
+                                 "print('ack')\n");
         py.mParams.files.add(LLProcess::FileParam("pipe")); // stdin
         py.mParams.files.add(LLProcess::FileParam("pipe")); // stdout
         py.launch();
@@ -1118,7 +1122,7 @@ namespace tut
     {
         set_test_name("ReadPipe \"eof\" event");
         PythonProcessLauncher py(get_test_name(),
-                                 "print 'Hello from Python!'\n");
+                                 "print('Hello from Python!')\n");
         py.mParams.files.add(LLProcess::FileParam()); // stdin
         py.mParams.files.add(LLProcess::FileParam("pipe")); // stdout
         py.launch();