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-rw-r--r--engine/SCons/Tool/lex.py54
1 files changed, 49 insertions, 5 deletions
diff --git a/engine/SCons/Tool/lex.py b/engine/SCons/Tool/lex.py
index b61ec90..155e2d9 100644
--- a/engine/SCons/Tool/lex.py
+++ b/engine/SCons/Tool/lex.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
@@ -31,16 +31,25 @@ selection method.
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
-__revision__ = "src/engine/SCons/Tool/lex.py 74b2c53bc42290e911b334a6b44f187da698a668 2017/11/14 13:16:53 bdbaddog"
+__revision__ = "src/engine/SCons/Tool/lex.py 72ae09dc35ac2626f8ff711d8c4b30b6138e08e3 2019-08-08 14:50:06 bdeegan"
import os.path
+import sys
import SCons.Action
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
LexAction = SCons.Action.Action("$LEXCOM", "$LEXCOMSTR")
+if sys.platform == 'win32':
+ BINS = ['flex', 'lex', 'win_flex']
+else:
+ BINS = ["flex", "lex"]
+
def lexEmitter(target, source, env):
sourceBase, sourceExt = os.path.splitext(SCons.Util.to_String(source[0]))
@@ -64,6 +73,29 @@ def lexEmitter(target, source, env):
target.append(fileName)
return (target, source)
+def get_lex_path(env, append_paths=False):
+ """
+ Find the path to the lex tool, searching several possible names
+
+ Only called in the Windows case, so the default_path
+ can be Windows-specific
+
+ :param env: current construction environment
+ :param append_paths: if set, add the path to the tool to PATH
+ :return: path to lex tool, if found
+ """
+ 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 append_paths:
+ 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 lex to an Environment."""
c_file, cxx_file = SCons.Tool.createCFileBuilders(env)
@@ -83,12 +115,24 @@ def generate(env):
cxx_file.add_action(".ll", LexAction)
cxx_file.add_emitter(".ll", lexEmitter)
- env["LEX"] = env.Detect("flex") or "lex"
env["LEXFLAGS"] = SCons.Util.CLVar("")
- env["LEXCOM"] = "$LEX $LEXFLAGS -t $SOURCES > $TARGET"
+
+ if sys.platform == 'win32':
+ # ignore the return - we do not need the full path here
+ _ = get_lex_path(env, append_paths=True)
+ env["LEX"] = env.Detect(BINS)
+ if not env.get("LEXUNISTD"):
+ env["LEXUNISTD"] = SCons.Util.CLVar("")
+ env["LEXCOM"] = "$LEX $LEXUNISTD $LEXFLAGS -t $SOURCES > $TARGET"
+ else:
+ env["LEX"] = env.Detect(BINS)
+ env["LEXCOM"] = "$LEX $LEXFLAGS -t $SOURCES > $TARGET"
def exists(env):
- return env.Detect(["flex", "lex"])
+ if sys.platform == 'win32':
+ return get_lex_path(env)
+ else:
+ return env.Detect(BINS)
# Local Variables:
# tab-width:4