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Refactor scripts in Tools/peg_generator/scripts (GH-20401) 

(cherry picked from commit ba6fd87e41)

Co-authored-by: Lysandros Nikolaou <lisandrosnik@gmail.com>
This commit is contained in:
Miss Islington (bot) 2020-06-05 21:41:12 -07:00 committed by GitHub
parent d5e7348e41
commit 18f1226884
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
7 changed files with 146 additions and 147 deletions
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16
Modules/_peg_parser.c
View File

@ -80,14 +80,15 @@ _Py_compile_string(PyObject *self, PyObject *args, PyObject *kwds)
PyObject *
_Py_parse_string(PyObject *self, PyObject *args, PyObject *kwds)
{
static char *keywords[] = {"string", "filename", "mode", "oldparser", NULL};
static char *keywords[] = {"string", "filename", "mode", "oldparser", "ast", NULL};
char *the_string;
char *filename = "<string>";
char *mode_str = "exec";
int oldparser = 0;
int ast = 1;
if (!PyArg_ParseTupleAndKeywords(args, kwds, "s|ssp", keywords,
&the_string, &filename, &mode_str, &oldparser)) {
if (!PyArg_ParseTupleAndKeywords(args, kwds, "s|sspp", keywords,
&the_string, &filename, &mode_str, &oldparser, &ast)) {
return NULL;
}
@ -110,7 +111,14 @@ _Py_parse_string(PyObject *self, PyObject *args, PyObject *kwds)
return NULL;
}
PyObject *result = PyAST_mod2obj(mod);
PyObject *result;
if (ast) {
result = PyAST_mod2obj(mod);
}
else {
Py_INCREF(Py_None);
result = Py_None;
}
PyArena_Free(arena);
return result;
}

14
Tools/peg_generator/Makefile
View File

@ -70,23 +70,21 @@ stats: peg_extension/parse.c data/xxl.py
time: time_compile
time_compile: venv data/xxl.py
$(VENVPYTHON) scripts/benchmark.py --parser=pegen --target=xxl compile
$(VENVPYTHON) scripts/benchmark.py --parser=new --target=xxl compile
time_parse: venv data/xxl.py
$(VENVPYTHON) scripts/benchmark.py --parser=pegen --target=xxl parse
$(VENVPYTHON) scripts/benchmark.py --parser=new --target=xxl parse
time_old: time_old_compile
time_old_compile: venv data/xxl.py
$(VENVPYTHON) scripts/benchmark.py --parser=cpython --target=xxl compile
$(VENVPYTHON) scripts/benchmark.py --parser=old --target=xxl compile
time_old_parse: venv data/xxl.py
$(VENVPYTHON) scripts/benchmark.py --parser=cpython --target=xxl parse
$(VENVPYTHON) scripts/benchmark.py --parser=old --target=xxl parse
time_peg_dir: venv
$(VENVPYTHON) scripts/test_parse_directory.py \
--grammar-file $(GRAMMAR) \
--tokens-file $(TOKENS) \
-d $(TESTDIR) \
$(TESTFLAGS) \
--exclude "*/failset/*" \
@ -95,12 +93,8 @@ time_peg_dir: venv
time_stdlib: $(CPYTHON) venv
$(VENVPYTHON) scripts/test_parse_directory.py \
--grammar-file $(GRAMMAR) \
--tokens-file $(TOKENS) \
-d $(CPYTHON) \
$(TESTFLAGS) \
--exclude "*/test2to3/*" \
--exclude "*/test2to3/**/*" \
--exclude "*/bad*" \
--exclude "*/lib2to3/tests/data/*"

31
Tools/peg_generator/scripts/benchmark.py
View File

@ -24,7 +24,7 @@ argparser = argparse.ArgumentParser(
argparser.add_argument(
"--parser",
action="store",
choices=["pegen", "cpython"],
choices=["new", "old"],
default="pegen",
help="Which parser to benchmark (default is pegen)",
)
@ -40,7 +40,12 @@ subcommands = argparser.add_subparsers(title="Benchmarks", dest="subcommand")
command_compile = subcommands.add_parser(
"compile", help="Benchmark parsing and compiling to bytecode"
)
command_parse = subcommands.add_parser("parse", help="Benchmark parsing and generating an ast.AST")
command_parse = subcommands.add_parser(
"parse", help="Benchmark parsing and generating an ast.AST"
)
command_notree = subcommands.add_parser(
"notree", help="Benchmark parsing and dumping the tree"
)
def benchmark(func):
@ -62,7 +67,7 @@ def benchmark(func):
@benchmark
def time_compile(source, parser):
if parser == "cpython":
if parser == "old":
return _peg_parser.compile_string(
source,
oldparser=True,
@ -73,32 +78,40 @@ def time_compile(source, parser):
@benchmark
def time_parse(source, parser):
if parser == "cpython":
if parser == "old":
return _peg_parser.parse_string(source, oldparser=True)
else:
return _peg_parser.parse_string(source)
@benchmark
def time_notree(source, parser):
if parser == "old":
return _peg_parser.parse_string(source, oldparser=True, ast=False)
else:
return _peg_parser.parse_string(source, ast=False)
def run_benchmark_xxl(subcommand, parser, source):
if subcommand == "compile":
time_compile(source, parser)
elif subcommand == "parse":
time_parse(source, parser)
elif subcommand == "notree":
time_notree(source, parser)
def run_benchmark_stdlib(subcommand, parser):
modes = {"compile": 2, "parse": 1, "notree": 0}
for _ in range(3):
parse_directory(
"../../Lib",
"../../Grammar/python.gram",
"../../Grammar/Tokens",
verbose=False,
excluded_files=["*/bad*", "*/lib2to3/tests/data/*",],
skip_actions=False,
tree_arg=0,
short=True,
mode=2 if subcommand == "compile" else 1,
parser=parser,
mode=modes[subcommand],
oldparser=(parser == "old"),
)

19
Tools/peg_generator/scripts/grammar_grapher.py
View File

@ -42,6 +42,13 @@ from pegen.grammar import (
)
argparser = argparse.ArgumentParser(prog="graph_grammar", description="Graph a grammar tree",)
argparser.add_argument(
"-s",
"--start",
choices=["exec", "eval", "single"],
default="exec",
help="Choose the grammar's start rule (exec, eval or single)",
)
argparser.add_argument("grammar_file", help="The grammar file to graph")
@ -91,19 +98,15 @@ def main() -> None:
references[name] = set(references_for_item(rule))
# Flatten the start node if has only a single reference
root_node = "start"
if start := references["start"]:
if len(start) == 1:
root_node = list(start)[0]
del references["start"]
root_node = {"exec": "file", "eval": "eval", "single": "interactive"}[args.start]
print("digraph g1 {")
print('\toverlap="scale";') # Force twopi to scale the graph to avoid overlaps
print(f'\troot="{root_node}";')
print(f"\t{root_node} [color=green, shape=circle]")
print(f"\t{root_node} [color=green, shape=circle];")
for name, refs in references.items():
if refs: # Ignore empty sets
print(f"\t{name} -> {','.join(refs)};")
for ref in refs:
print(f"\t{name} -> {ref};")
print("}")

21
Tools/peg_generator/scripts/show_parse.py
View File

@ -41,7 +41,13 @@ parser = argparse.ArgumentParser()
parser.add_argument(
"-d", "--diff", action="store_true", help="show diff between grammar and ast (requires -g)"
)
parser.add_argument("-g", "--grammar-file", help="grammar to use (default: use the ast module)")
parser.add_argument(
"-p",
"--parser",
choices=["new", "old"],
default="new",
help="choose the parser to use"
)
parser.add_argument(
"-m",
"--multiline",
@ -84,19 +90,18 @@ def print_parse(source: str, verbose: bool = False) -> None:
def main() -> None:
args = parser.parse_args()
if args.diff and not args.grammar_file:
parser.error("-d/--diff requires -g/--grammar-file")
new_parser = args.parser == "new"
if args.multiline:
sep = "\n"
else:
sep = " "
program = sep.join(args.program)
if args.grammar_file:
if new_parser:
tree = _peg_parser.parse_string(program)
if args.diff:
a = tree
b = _peg_parser.parse_string(program, oldparser=True)
a = _peg_parser.parse_string(program, oldparser=True)
b = tree
diff = diff_trees(a, b, args.verbose)
if diff:
for line in diff:
@ -104,11 +109,11 @@ def main() -> None:
else:
print("# Trees are the same")
else:
print(f"# Parsed using {args.grammar_file}")
print("# Parsed using the new parser")
print(format_tree(tree, args.verbose))
else:
tree = _peg_parser.parse_string(program, oldparser=True)
print("# Parse using the old parser")
print("# Parsed using the old parser")
print(format_tree(tree, args.verbose))

177
Tools/peg_generator/scripts/test_parse_directory.py
View File

@ -11,7 +11,7 @@ import _peg_parser
from glob import glob
from pathlib import PurePath
from typing import List, Optional, Any
from typing import List, Optional, Any, Tuple
sys.path.insert(0, os.getcwd())
from pegen.ast_dump import ast_dump
@ -22,13 +22,15 @@ SUCCESS = "\033[92m"
FAIL = "\033[91m"
ENDC = "\033[0m"
COMPILE = 2
PARSE = 1
NOTREE = 0
argparser = argparse.ArgumentParser(
prog="test_parse_directory",
description="Helper program to test directories or files for pegen",
)
argparser.add_argument("-d", "--directory", help="Directory path containing files to test")
argparser.add_argument("--grammar-file", help="Grammar file path")
argparser.add_argument("--tokens-file", help="Tokens file path")
argparser.add_argument(
"-e", "--exclude", action="append", default=[], help="Glob(s) for matching files to exclude"
)
@ -38,9 +40,6 @@ argparser.add_argument(
argparser.add_argument(
"-v", "--verbose", action="store_true", help="Display detailed errors for failures"
)
argparser.add_argument(
"--skip-actions", action="store_true", help="Suppress code emission for rule actions",
)
argparser.add_argument(
"-t", "--tree", action="count", help="Compare parse tree to official AST", default=0
)
@ -113,92 +112,35 @@ def compare_trees(
return 1
def parse_directory(
directory: str,
grammar_file: str,
tokens_file: str,
verbose: bool,
excluded_files: List[str],
skip_actions: bool,
tree_arg: int,
short: bool,
mode: int,
parser: str,
) -> int:
if parser == "cpython" and (tree_arg or mode == 0):
print("Cannot specify tree argument or mode=0 with the cpython parser.", file=sys.stderr)
return 1
if not directory:
print("You must specify a directory of files to test.", file=sys.stderr)
return 1
if grammar_file and tokens_file:
if not os.path.exists(grammar_file):
print(f"The specified grammar file, {grammar_file}, does not exist.", file=sys.stderr)
return 1
else:
print(
"A grammar file or a tokens file was not provided - attempting to use existing parser from stdlib...\n"
def parse_file(source: str, file: str, mode: int, oldparser: bool) -> Tuple[Any, float]:
t0 = time.time()
if mode == COMPILE:
result = _peg_parser.compile_string(
source,
filename=file,
oldparser=oldparser,
)
else:
result = _peg_parser.parse_string(
source,
filename=file,
oldparser=oldparser,
ast=(mode == PARSE),
)
if tree_arg:
assert mode == 1, "Mode should be 1 (parse), when comparing the generated trees"
# For a given directory, traverse files and attempt to parse each one
# - Output success/failure for each file
errors = 0
files = []
trees = {} # Trees to compare (after everything else is done)
total_seconds = 0
for file in sorted(glob(f"{directory}/**/*.py", recursive=True)):
# Only attempt to parse Python files and files that are not excluded
should_exclude_file = False
for pattern in excluded_files:
if PurePath(file).match(pattern):
should_exclude_file = True
break
if not should_exclude_file:
with tokenize.open(file) as f:
source = f.read()
try:
t0 = time.time()
if mode == 2:
result = _peg_parser.compile_string(
source,
filename=file,
oldparser=parser == "cpython",
)
else:
result = _peg_parser.parse_string(
source,
filename=file,
oldparser=parser == "cpython"
)
t1 = time.time()
total_seconds += (t1 - t0)
if tree_arg:
trees[file] = result
if not short:
report_status(succeeded=True, file=file, verbose=verbose)
except Exception as error:
try:
_peg_parser.parse_string(source, mode="exec", oldparser=True)
except Exception:
if not short:
print(f"File {file} cannot be parsed by either pegen or the ast module.")
else:
report_status(
succeeded=False, file=file, verbose=verbose, error=error, short=short
)
errors += 1
files.append(file)
t1 = time.time()
return result, t1 - t0
def is_parsing_failure(source: str) -> bool:
try:
_peg_parser.parse_string(source, mode="exec", oldparser=True)
except SyntaxError:
return False
return True
def generate_time_stats(files, total_seconds) -> None:
total_files = len(files)
total_bytes = 0
total_lines = 0
for file in files:
@ -217,6 +159,57 @@ def parse_directory(
f"or {total_bytes / total_seconds :,.0f} bytes/sec.",
)
def parse_directory(
directory: str,
verbose: bool,
excluded_files: List[str],
tree_arg: int,
short: bool,
mode: int,
oldparser: bool,
) -> int:
if tree_arg:
assert mode == PARSE, "Mode should be 1 (parse), when comparing the generated trees"
if oldparser and tree_arg:
print("Cannot specify tree argument with the cpython parser.", file=sys.stderr)
return 1
# For a given directory, traverse files and attempt to parse each one
# - Output success/failure for each file
errors = 0
files = []
trees = {} # Trees to compare (after everything else is done)
total_seconds = 0
for file in sorted(glob(f"{directory}/**/*.py", recursive=True)):
# Only attempt to parse Python files and files that are not excluded
if any(PurePath(file).match(pattern) for pattern in excluded_files):
continue
with tokenize.open(file) as f:
source = f.read()
try:
result, dt = parse_file(source, file, mode, oldparser)
total_seconds += dt
if tree_arg:
trees[file] = result
report_status(succeeded=True, file=file, verbose=verbose, short=short)
except SyntaxError as error:
if is_parsing_failure(source):
print(f"File {file} cannot be parsed by either parser.")
else:
report_status(
succeeded=False, file=file, verbose=verbose, error=error, short=short
)
errors += 1
files.append(file)
t1 = time.time()
generate_time_stats(files, total_seconds)
if short:
print_memstats()
@ -240,26 +233,20 @@ def parse_directory(
def main() -> None:
args = argparser.parse_args()
directory = args.directory
grammar_file = args.grammar_file
tokens_file = args.tokens_file
verbose = args.verbose
excluded_files = args.exclude
skip_actions = args.skip_actions
tree = args.tree
short = args.short
mode = 1 if args.tree else 2
sys.exit(
parse_directory(
directory,
grammar_file,
tokens_file,
verbose,
excluded_files,
skip_actions,
tree,
short,
mode,
"pegen",
oldparser=False,
)
)

15
Tools/peg_generator/scripts/test_pypi_packages.py
View File

@ -57,22 +57,11 @@ def find_dirname(package_name: str) -> str:
def run_tests(dirname: str, tree: int) -> int:
return test_parse_directory.parse_directory(
dirname,
HERE / ".." / ".." / ".." / "Grammar" / "python.gram",
HERE / ".." / ".." / ".." / "Grammar" / "Tokens",
verbose=False,
excluded_files=[
"*/failset/*",
"*/failset/**",
"*/failset/**/*",
"*/test2to3/*",
"*/test2to3/**/*",
"*/bad*",
"*/lib2to3/tests/data/*",
],
skip_actions=False,
excluded_files=[],
tree_arg=tree,
short=True,
mode=1,
mode=1 if tree else 0,
parser="pegen",
)