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#!/usr/bin/env python3
"""
Script to automatically update all tests in this repository based on the
status of the upstream repositories themselves. This will prepare a git
submodule-of-sorts (not literally) in `repos` with all the upstream
repos fetched into that one location. Tests will be diff'd against the merged
version of the upstream spec repo and the proposal repo, and if there's a
difference then the test is included.
"""
import os
import shutil
import subprocess
import sys
from datetime import datetime
class GitError(RuntimeError):
def __init__(self, output, args):
self.output = output
self.args = args
def __str__(self):
cmd = ' '.join(self.args)
desc = f'failed to run: git {cmd}'
desc += f'\n\treturncode: {self.output.returncode}'
if len(self.output.stdout) > 0:
stdout = self.output.stdout.replace('\n', '\n\t\t')
desc += f'\n\tstdout:\n\t\t{stdout}'
return desc
def git(*args, quiet=False):
"""
Helper to run a `git` command and handle the output/exit code in an
ergonomic fashion.
"""
if not quiet:
print('running: git', *args)
ret = subprocess.run(['git', *args], stdout=subprocess.PIPE, text=True)
if ret.returncode != 0:
raise GitError(ret, args)
return ret.stdout.strip()
class Repo:
def __init__(self, repo, branch = 'main', upstream = None):
self.repo = repo
if branch == 'main':
self.dir = repo
else:
self.dir = branch
self.branch = branch
self.upstream = upstream
def __str__(self):
repo = f'WebAssembly/{self.repo}'
if self.branch != 'main':
repo += f'@{self.branch}'
return repo
def update(self):
"""
Fetch the latest revision from this repository and store the revision
within `self` of what was found.
"""
Repo.git('fetch', self.url(), self.branch)
self.rev = Repo.git('rev-parse', 'FETCH_HEAD', quiet=True)
def url(self):
return f'https://github.com/WebAssembly/{self.repo}'
@staticmethod
def git(*args, **kwargs):
"""
Helper to run a `git` command within the `repos` repository.
"""
return git('-C', 'repos', *args, **kwargs)
def checkout_merge(self, spec=None):
"""
Check out this repository to `repos` with a merge against `spec`
if specified.
Returns `False` if the merge fails.
"""
Repo.git('checkout', '-B', 'try-merge')
Repo.git('reset', '--hard', self.rev)
if spec is None:
return True
try:
# Attempt to merge with the `spec` repository
Repo.git('merge', '-q', spec.rev, '-m', 'merge')
except GitError:
# If the merge failed try to ignore merge conflicts in non-test
# directories as we don't care about those changes
non_tests = ':(exclude)test/'
Repo.git('checkout', '--ours', non_tests)
Repo.git('add', non_tests)
try:
Repo.git('-c', 'core.editor=true', 'merge', '--continue')
except GitError:
# If all that failed then the merge couldn't be done.
Repo.git('merge', '--abort')
return False
self.merged_rev = Repo.git('rev-parse', 'HEAD', quiet=True)
return True
def list_tests(self):
"""
Return a list-of-triples where each triple is
(path_to_test, git_path_of_test, destination_path_of_test)
This is used to run diffs and copy the test to its final location.
"""
tests = []
for subdir in ['core', 'legacy']:
for root, dirs, files in os.walk(f'repos/test/{subdir}'):
for file in files:
path = os.path.join(root, file)
repo_path = os.path.relpath(path, 'repos')
ext = os.path.splitext(path)[1]
if ext != '.wast':
continue
dst = os.path.basename(path)
if subdir == 'legacy':
dst = 'legacy/' + dst
tests.append((path, repo_path, dst))
return tests
def main():
spec = Repo('spec')
spec3 = Repo('spec', branch='wasm-3.0')
repos = [
spec3,
Repo('threads'),
Repo('annotations'),
Repo('relaxed-simd'),
Repo('custom-page-sizes'),
Repo('wide-arithmetic'),
]
# Make sure that `repos` is a git repository
if not os.path.isdir('repos'):
git('init', 'repos')
failed_merges = []
updated = []
# Update the spec itself, reset to the latest version of the spec, and then
# copy all files from the upstream spec tests into this repository's own
# suite of tests to run.
spec.update()
spec.checkout_merge()
tests = []
for path, _repo_path, dst in spec.list_tests():
shutil.copyfile(path, dst)
tests.append(dst)
git('add', *tests, quiet=True)
status = git('status', '-s', *tests, quiet=True)
if len(status) > 0:
updated.append(spec)
# Process all upstream repositories and proposals.
for repo in repos:
# Repositories may not be mergable with the upstream spec repository in
# which case we skip them and print an informational message at the end.
repo.update()
if not repo.checkout_merge(spec):
failed_merges.append(repo)
continue
# Blow away this proposal's list of tests if it exists.
dstdir = f'proposals/{repo.dir}'
if os.path.isdir(dstdir):
shutil.rmtree(dstdir)
# For all tests in this proposal run a diff against the upstream
# revision. If the diff is non-empty then include this test by copying
# it to its destination.
for path, repo_path, dst in spec.list_tests():
upstream = repo.upstream or spec
diff = repo.git('diff', upstream.rev, repo.merged_rev, '--', repo_path, quiet=True)
if len(diff) == 0:
continue
dst = os.path.join(dstdir, dst)
os.makedirs(os.path.dirname(dst), exist_ok=True)
shutil.copyfile(path, dst)
# If anything changed, then this is an updated proposal, and take note
# of that for later.
git('add', dstdir)
status = git('status', '-s', dstdir)
if len(status) > 0:
updated.append(repo)
for repo in failed_merges:
print('!! failed to update:', repo.url())
# If anything was updated, make a commit message indicating as such.
if len(updated) == 0:
print('No spec changes found, not creating a new commit')
return 0
today = datetime.now().strftime("%Y-%m-%d")
message = f'Auto-update for {today}\n\nUpdate repos:\n\n'
for repo in updated:
message += f' {repo.dir}:\n'
message += f' {repo.url()}/commit/{repo.rev}\n'
message += '\n'
message += 'This change was automatically generated by `update-testsuite.py`'
git('commit', '-a', '-m', message)
return 0
if __name__ == '__main__':
sys.exit(main())