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#!/usr/bin/env python
#
# Copyright 2016 WebAssembly Community Group participants
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
import argparse
import os
import subprocess
import sys
import find_exe
import utils
from utils import Error
SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
GEN_SPEC_JS_PY = os.path.join(SCRIPT_DIR, 'gen-spec-js.py')
def main(args):
parser = argparse.ArgumentParser()
parser.add_argument('-o', '--out-dir', metavar='PATH',
help='output directory for files.')
parser.add_argument('--bindir', metavar='PATH',
default=find_exe.GetDefaultPath(),
help='directory to search for all executables.')
parser.add_argument(
'--js-engine', metavar='PATH',
help='the path to the JavaScript engine with which to run'
' the generated JavaScript. If not specified, JavaScript'
' output will be written to stdout.')
parser.add_argument('--js-engine-flags', metavar='FLAGS',
help='additional flags for JavaScript engine.',
action='append', default=[])
parser.add_argument('--prefix-js',
help='Prefix JavaScript file to pass to gen-spec-js')
parser.add_argument('-v', '--verbose', help='print more diagnotic messages.',
action='store_true')
parser.add_argument('--no-error-cmdline',
help='don\'t display the subprocess\'s commandline when'
+ ' an error occurs', dest='error_cmdline',
action='store_false')
parser.add_argument('-p', '--print-cmd',
help='print the commands that are run.',
action='store_true')
parser.add_argument('file', help='wast file.')
options = parser.parse_args(args)
with utils.TempDirectory(options.out_dir, 'run-gen-spec-js-') as out_dir:
wast2wasm = utils.Executable(
find_exe.GetWast2WasmExecutable(options.bindir), '--spec',
error_cmdline=options.error_cmdline)
wast2wasm.AppendOptionalArgs({'-v': options.verbose})
gen_spec_js = utils.Executable(sys.executable, GEN_SPEC_JS_PY,
'--temp-dir', out_dir,
error_cmdline=options.error_cmdline)
gen_spec_js.AppendOptionalArgs({
'--bindir': options.bindir,
'--prefix': options.prefix_js,
})
gen_spec_js.verbose = options.print_cmd
json_file = utils.ChangeDir(
utils.ChangeExt(options.file, '.json'), out_dir)
js_file = utils.ChangeExt(json_file, '.js')
wast2wasm.RunWithArgs(options.file, '-o', json_file)
if options.js_engine:
gen_spec_js.RunWithArgs(json_file, '-o', js_file)
js = utils.Executable(options.js_engine, *options.js_engine_flags)
js.RunWithArgs(js_file)
else:
# Write JavaScript output to stdout
gen_spec_js.RunWithArgs(json_file)
if __name__ == '__main__':
try:
sys.exit(main(sys.argv[1:]))
except Error as e:
sys.stderr.write(str(e) + '\n')
sys.exit(1)
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