1 files changed, 33 insertions, 9 deletions
diff --git a/src/engine/SCons/Tool/swig.py b/src/engine/SCons/Tool/swig.py
index dedf103..a207a89 100644
--- a/src/engine/SCons/Tool/swig.py
+++ b/src/engine/SCons/Tool/swig.py
@@ -10,7 +10,7 @@ selection method.
 from __future__ import print_function
 
 #
-# Copyright (c) 2001 - 2017 The SCons Foundation
+# Copyright (c) 2001 - 2019 The SCons Foundation
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the
@@ -32,9 +32,10 @@ from __future__ import print_function
 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #
 
-__revision__ = "src/engine/SCons/Tool/swig.py rel_3.0.0:4395:8972f6a2f699 2017/09/18 12:59:24 bdbaddog"
+__revision__ = "src/engine/SCons/Tool/swig.py 103260fce95bf5db1c35fb2371983087d85dd611 2019-07-13 18:25:30 bdbaddog"
 
 import os.path
+import sys
 import re
 import subprocess
 
@@ -69,7 +70,9 @@ def _find_modules(src):
     directors = 0
     mnames = []
     try:
-        matches = _reModule.findall(open(src).read())
+        with open(src) as f:
+            data = f.read()
+        matches = _reModule.findall(data)
     except IOError:
         # If the file's not yet generated, guess the module name from the file stem
         matches = []
@@ -134,21 +137,31 @@ def _swigEmitter(target, source, env):
 
 def _get_swig_version(env, swig):
     """Run the SWIG command line tool to get and return the version number"""
+    version = None
     swig = env.subst(swig)
+    if not swig:
+        return version
     pipe = SCons.Action._subproc(env, SCons.Util.CLVar(swig) + ['-version'],
                                  stdin = 'devnull',
                                  stderr = 'devnull',
                                  stdout = subprocess.PIPE)
-    if pipe.wait() != 0: return
+    if pipe.wait() != 0:
+        return version
 
     # MAYBE:   out = SCons.Util.to_str (pipe.stdout.read())
-    out = SCons.Util.to_str(pipe.stdout.read())
-    match = re.search('SWIG Version\s+(\S+).*', out, re.MULTILINE)
+    with pipe.stdout:
+        out = SCons.Util.to_str(pipe.stdout.read())
+
+    match = re.search(r'SWIG Version\s+(\S+).*', out, re.MULTILINE)
     if match:
-        if verbose: print("Version is:%s"%match.group(1))
-        return match.group(1)
+        version = match.group(1)
+        if verbose:
+            print("Version is: %s" % version)
     else:
-        if verbose: print("Unable to detect version: [%s]"%out)
+        if verbose:
+            print("Unable to detect version: [%s]" % out)
+
+    return version
 
 def generate(env):
     """Add Builders and construction variables for swig to an Environment."""
@@ -169,6 +182,17 @@ def generate(env):
     java_file.add_action('.i', SwigAction)
     java_file.add_emitter('.i', _swigEmitter)
 
+    from SCons.Platform.mingw import MINGW_DEFAULT_PATHS
+    from SCons.Platform.cygwin import CYGWIN_DEFAULT_PATHS
+
+    if sys.platform == 'win32':
+        swig = SCons.Tool.find_program_path(env, 'swig', default_paths=MINGW_DEFAULT_PATHS + CYGWIN_DEFAULT_PATHS + [r'C:\ProgramData\chocolatey\bin'] )
+        if swig:
+            swig_bin_dir = os.path.dirname(swig)
+            env.AppendENVPath('PATH', swig_bin_dir)
+        else:
+            SCons.Warnings.Warning('swig tool requested, but binary not found in ENV PATH')
+
     if 'SWIG' not in env:
         env['SWIG'] = env.Detect(swigs) or swigs[0]
     env['SWIGVERSION']       = _get_swig_version(env, env['SWIG'])