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Make RLMeta compilable in one command and replace Bash scripts with P…
…ython.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| def compile_grammar(grammar): | ||
| return CodeGenerator().run( | ||
| "ast", | ||
| [Parser().run("grammar", grammar)] | ||
| ) | ||
|
|
||
| if __name__ == "__main__": | ||
| import sys | ||
| import pprint | ||
| def read(path): | ||
| if path == "-": | ||
| return sys.stdin.read() | ||
| with open(path) as f: | ||
| return f.read() | ||
| args = sys.argv[1:] or ["--compile", "-"] | ||
| while args: | ||
| command = args.pop(0) | ||
| if command == "--support": | ||
| sys.stdout.write(SUPPORT) | ||
| elif command == "--copy": | ||
| sys.stdout.write(read(args.pop(0))) | ||
| elif command == "--embed": | ||
| sys.stdout.write("{} = {}\n".format( | ||
| args.pop(0), | ||
| repr(read(args.pop(0))) | ||
| )) | ||
| elif command == "--compile": | ||
| try: | ||
| sys.stdout.write(compile_grammar(read(args.pop(0)))) | ||
| except MatchError as e: | ||
| stream = e.stream | ||
| for pos in e.pos[:-1]: | ||
| stream = stream[pos] | ||
| pos = e.pos[-1] | ||
| MARKER = "\033[0;31m<ERROR POSITION>\033[0m" | ||
| if isinstance(stream, basestring): | ||
| stream_string = stream[:pos] + MARKER + stream[pos:] | ||
| else: | ||
| stream_string = pprint.pformat(stream) | ||
| sys.exit("ERROR: {}\nPOSITION: {}\nSTREAM:\n{}".format( | ||
| e.message, | ||
| pos, | ||
| indent(stream_string) | ||
| )) | ||
| else: | ||
| sys.exit("ERROR: Unknown command '{}'".format(command)) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| #!/usr/bin/env python | ||
|
|
||
| import os | ||
| import subprocess | ||
| import sys | ||
|
|
||
| def make_next_version(): | ||
| intermediate_compilers = meta_compile_rlmeta() | ||
| final_compiler = intermediate_compilers.pop(-1) | ||
| test(final_compiler) | ||
| mv(final_compiler, "rlmeta.py") | ||
| for compiler in intermediate_compilers: | ||
| rm(compiler) | ||
| log("OK!") | ||
|
|
||
| def test(rlmeta): | ||
| log("Test: Has its own support library") | ||
| assert run_rlmeta(rlmeta, ["--support"]) == read("support.py") | ||
| log("Test: Disallow semantic action in the middle") | ||
| run_rlmeta(rlmeta, [], "Grammar { x = . -> [] . }", expect_failure=True) | ||
|
|
||
| def meta_compile_rlmeta(): | ||
| compiler = "rlmeta.py" | ||
| content = read(compiler) | ||
| intermediate_compilers = [] | ||
| for i in range(4): | ||
| next_compiler = "rlmeta{}.py".format(i+1) | ||
| log("Compiling {} -> {}".format(compiler, next_compiler)) | ||
| next_content = compile_rlmeta(compiler) | ||
| write(next_compiler, next_content) | ||
| intermediate_compilers.append(next_compiler) | ||
| if next_content == content: | ||
| return intermediate_compilers | ||
| compiler = next_compiler | ||
| content = next_content | ||
| fail("Unable to produce metacompiler.") | ||
|
|
||
| def compile_rlmeta(rlmeta): | ||
| return run_rlmeta(rlmeta, [ | ||
| "--embed", "SUPPORT", "support.py", | ||
| "--support", | ||
| "--compile", "parser.rlmeta", | ||
| "--compile", "codegenerator.rlmeta", | ||
| "--copy", "main.py", | ||
| ]) | ||
|
|
||
| def run_rlmeta(rlmeta, args, stdin="", expect_failure=False): | ||
| process = subprocess.Popen( | ||
| ["python", rlmeta]+args, | ||
| stdin=subprocess.PIPE, | ||
| stdout=subprocess.PIPE | ||
| ) | ||
| stdout, _ = process.communicate(stdin) | ||
| if expect_failure: | ||
| if process.returncode == 0: | ||
| fail("Expected failure") | ||
| else: | ||
| if process.returncode != 0: | ||
| fail("Expected success") | ||
| return stdout | ||
|
|
||
| def mv(src, dest): | ||
| log("Move {} -> {}".format(src, dest)) | ||
| os.remove(dest) | ||
| os.rename(src, dest) | ||
|
|
||
| def rm(path): | ||
| log("Delete {}".format(path)) | ||
| os.remove(path) | ||
|
|
||
| def read(path): | ||
| with open(path) as f: | ||
| return f.read() | ||
|
|
||
| def write(path, content): | ||
| with open(path, "w") as f: | ||
| return f.write(content) | ||
|
|
||
| def log(message): | ||
| sys.stdout.write("\033[0;33m{}\033[0m\n".format(message)) | ||
|
|
||
| def fail(message): | ||
| sys.exit("\033[0;31mERROR: {}\033[0m".format(message)) | ||
|
|
||
| if __name__ == "__main__": | ||
| make_next_version() |
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