New upstream version 3.0.5upstream/3.0.5

1 files changed, 42 insertions, 3 deletions

diff --git a/src/engine/SCons/Tool/yacc.py b/src/engine/SCons/Tool/yacc.py
index 4f9fbc2..d397de1 100644
--- a/src/engine/SCons/Tool/yacc.py
+++ b/src/engine/SCons/Tool/yacc.py
@@ -9,7 +9,7 @@ selection method.
 """
 
 #
-# 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
@@ -31,13 +31,17 @@ selection method.
 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #
 
-__revision__ = "src/engine/SCons/Tool/yacc.py rel_3.0.0:4395:8972f6a2f699 2017/09/18 12:59:24 bdbaddog"
+__revision__ = "src/engine/SCons/Tool/yacc.py 103260fce95bf5db1c35fb2371983087d85dd611 2019-07-13 18:25:30 bdbaddog"
 
 import os.path
+import sys
 
 import SCons.Defaults
 import SCons.Tool
 import SCons.Util
+from SCons.Platform.mingw import MINGW_DEFAULT_PATHS
+from SCons.Platform.cygwin import CYGWIN_DEFAULT_PATHS
+from SCons.Platform.win32 import CHOCO_DEFAULT_PATH
 
 YaccAction = SCons.Action.Action("$YACCCOM", "$YACCCOMSTR")
 
@@ -94,6 +98,28 @@ def ymEmitter(target, source, env):
 def yyEmitter(target, source, env):
     return _yaccEmitter(target, source, env, ['.yy'], '$YACCHXXFILESUFFIX')
 
+def get_yacc_path(env, append_paths=False):
+    """
+    Find the a path containing the lex or flex binaries. If a construction 
+    environment is passed in then append the path to the ENV PATH.
+    """
+    # save existing path to reset if we don't want to append any paths
+    envPath = env['ENV']['PATH']
+    bins = ['bison', 'yacc', 'win_bison']
+
+    for prog in bins:
+        bin_path = SCons.Tool.find_program_path(
+            env, 
+            prog, 
+            default_paths=CHOCO_DEFAULT_PATH + MINGW_DEFAULT_PATHS + CYGWIN_DEFAULT_PATHS )
+        if bin_path:
+            if not append_paths:
+                env['ENV']['PATH'] = envPath
+            else:
+                env.AppendENVPath('PATH', os.path.dirname(bin_path))
+            return bin_path
+    SCons.Warnings.Warning('lex tool requested, but lex or flex binary not found in ENV PATH')
+
 def generate(env):
     """Add Builders and construction variables for yacc to an Environment."""
     c_file, cxx_file = SCons.Tool.createCFileBuilders(env)
@@ -113,7 +139,20 @@ def generate(env):
     cxx_file.add_action('.yy', YaccAction)
     cxx_file.add_emitter('.yy', yyEmitter)
 
-    env['YACC']      = env.Detect('bison') or 'yacc'
+    if sys.platform == 'win32':
+        bison = SCons.Tool.find_program_path(env, 'bison', default_paths=MINGW_DEFAULT_PATHS + CYGWIN_DEFAULT_PATHS )
+        if bison:
+            bison_bin_dir = os.path.dirname(bison)
+            env.AppendENVPath('PATH', bison_bin_dir)
+        else:
+            SCons.Warnings.Warning('yacc tool requested, but bison binary not found in ENV PATH')
+
+    if sys.platform == 'win32':
+        get_yacc_path(env, append_paths=True)
+        env["YACC"] = env.Detect(['bison', 'yacc', 'win_bison'])
+    else:
+        env["YACC"] = env.Detect(["bison", "yacc"])
+    
     env['YACCFLAGS'] = SCons.Util.CLVar('')
     env['YACCCOM']   = '$YACC $YACCFLAGS -o $TARGET $SOURCES'
     env['YACCHFILESUFFIX'] = '.h'