diff options
Diffstat (limited to 'engine/SCons/Tool/lex.py')
| -rw-r--r-- | engine/SCons/Tool/lex.py | 54 |
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 |