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# Copyright (c) 2023 Egor Tensin <Egor.Tensin@gmail.com>
# This file is part of the "cimple" project.
# For details, see https://github.com/egor-tensin/cimple.
# Distributed under the MIT License.
import abc
import base64
import logging
import os
import random
import shlex
import shutil
from .process import Process
class Repo:
BRANCH = 'main'
def __init__(self, path):
self.path = os.path.abspath(path)
os.makedirs(path, exist_ok=True)
self.run('git', 'init', '-q', f'--initial-branch={Repo.BRANCH}')
self.run('git', 'config', 'user.name', 'Test User')
self.run('git', 'config', 'user.email', 'test@example.com')
def run(self, *args, **kwargs):
Process.run(*args, cwd=self.path, **kwargs)
CI_SCRIPT = r'''#!/usr/bin/env bash
set -o errexit -o nounset -o pipefail
shopt -s inherit_errexit lastpipe
readonly runs_dir={runs_dir}
readonly run_output_template=run_XXXXXX
run_output_path="$( mktemp --tmpdir="$runs_dir" "$run_output_template" )"
readonly run_output_path
touch -- "$run_output_path"
'''
class TestRepo(Repo):
# Prevent Pytest from discovering test cases in this class:
__test__ = False
def _format_ci_script(self):
runs_dir = shlex.quote(self.runs_dir)
return CI_SCRIPT.format(runs_dir=runs_dir)
def __init__(self, path, ci_script='ci.sh'):
super().__init__(path)
self.runs_dir = os.path.join(self.path, 'runs')
os.makedirs(self.runs_dir, exist_ok=True)
self.ci_script_path = os.path.join(self.path, ci_script)
with open(self.ci_script_path, mode='x') as f:
f.write(self._format_ci_script())
os.chmod(self.ci_script_path, 0o755)
self.run('git', 'add', '--', ci_script)
self.run('git', 'commit', '-q', '-m', 'add CI script')
def count_run_files(self):
return len([name for name in os.listdir(self.runs_dir) if os.path.isfile(os.path.join(self.runs_dir, name))])
class TestRepoOutput(TestRepo, abc.ABC):
__test__ = False
OUTPUT_SCRIPT_NAME = 'generate-output'
def __init__(self, path):
super().__init__(path)
self.output_script_path = os.path.join(self.path, TestRepoOutput.OUTPUT_SCRIPT_NAME)
with open(self.output_script_path, mode='x') as f:
f.write(self._format_output_script())
os.chmod(self.output_script_path, 0o755)
with open(self.ci_script_path, mode='a') as f:
f.write(self._format_ci_script_addition())
self.run('git', 'add', '--', TestRepoOutput.OUTPUT_SCRIPT_NAME)
self.run('git', 'add', '-u')
self.run('git', 'commit', '-q', '-m', 'add output script')
@abc.abstractmethod
def _format_output_script(self):
pass
def _format_ci_script_addition(self):
return r'{output_script} | tee -a "$run_output_path"'.format(
output_script=shlex.quote(self.output_script_path))
@abc.abstractmethod
def run_output_matches(self, output):
pass
OUTPUT_SCRIPT_SIMPLE = r'''#!/usr/bin/env bash
set -o errexit -o nounset -o pipefail
shopt -s inherit_errexit lastpipe
timestamp="$( date --iso-8601=ns )"
readonly timestamp
echo "A CI run happened at $timestamp"
'''
class TestRepoOutputSimple(TestRepoOutput):
__test__ = False
def _format_output_script(self):
return OUTPUT_SCRIPT_SIMPLE
def run_output_matches(self, output):
return output.decode().startswith('A CI run happened at ')
OUTPUT_SCRIPT_EMPTY = r'''#!/bin/sh
true
'''
class TestRepoOutputEmpty(TestRepoOutput):
__test__ = False
def _format_output_script(self):
return OUTPUT_SCRIPT_EMPTY
def run_output_matches(self, output):
return len(output) == 0
# Making it a bash script introduces way too much overhead with all the
# argument expansions; it slows things down considerably.
OUTPUT_SCRIPT_LONG = r'''#!/usr/bin/env python3
output = {output}
import sys
sys.stdout.write(output)
'''
class TestRepoOutputLong(TestRepoOutput):
__test__ = False
OUTPUT_LEN_KB = 300
def __init__(self, *args, **kwargs):
nb = TestRepoOutputLong.OUTPUT_LEN_KB * 1024
self.output = base64.encodebytes(random.randbytes(nb)).decode()
super().__init__(*args, **kwargs)
def _format_output_script(self):
return OUTPUT_SCRIPT_LONG.format(output=repr(self.output))
def run_output_matches(self, output):
return output.decode() == self.output
OUTPUT_SCRIPT_NULL = r'''#!/usr/bin/env python3
output = {output}
import sys
sys.stdout.buffer.write(output)
'''
class TestRepoOutputNull(TestRepoOutput):
__test__ = False
OUTPUT = b'123\x00456\x00789'
def __init__(self, *args, **kwargs):
assert len(TestRepoOutputNull.OUTPUT) == 11
self.output = TestRepoOutputNull.OUTPUT
super().__init__(*args, **kwargs)
def _format_output_script(self):
return OUTPUT_SCRIPT_NULL.format(output=repr(self.output))
def run_output_matches(self, output):
return output == self.output
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