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<?php
declare(strict_types=1);
namespace GrumPHP\Task\Git;
use GrumPHP\Exception\RuntimeException;
use GrumPHP\Git\GitRepository;
use GrumPHP\Runner\TaskResult;
use GrumPHP\Runner\TaskResultInterface;
use GrumPHP\Task\Config\EmptyTaskConfig;
use GrumPHP\Task\Config\TaskConfigInterface;
use GrumPHP\Task\Context\ContextInterface;
use GrumPHP\Task\Context\GitCommitMsgContext;
use GrumPHP\Task\TaskInterface;
use GrumPHP\Util\Regex;
use GrumPHP\Util\Str;
use Symfony\Component\OptionsResolver\OptionsResolver;
class CommitMessage implements TaskInterface
{
/**
* @var TaskConfigInterface
*/
private $config;
/**
* @var GitRepository
*/
private $repository;
public static function getConfigurableOptions(): OptionsResolver
{
$resolver = new OptionsResolver();
$resolver->setDefaults([
'allow_empty_message' => false,
'enforce_capitalized_subject' => true,
'enforce_no_subject_punctuations' => false,
'enforce_no_subject_trailing_period' => true,
'enforce_single_lined_subject' => true,
'max_body_width' => 72,
'max_subject_width' => 60,
'case_insensitive' => true,
'multiline' => true,
'type_scope_conventions' => [],
'matchers' => [],
'additional_modifiers' => '',
]);
$resolver->addAllowedTypes('allow_empty_message', ['bool']);
$resolver->addAllowedTypes('type_scope_conventions', ['array']);
$resolver->addAllowedTypes('enforce_capitalized_subject', ['bool']);
$resolver->addAllowedTypes('enforce_no_subject_punctuations', ['bool']);
$resolver->addAllowedTypes('enforce_no_subject_trailing_period', ['bool']);
$resolver->addAllowedTypes('enforce_single_lined_subject', ['bool']);
$resolver->addAllowedTypes('max_body_width', ['int']);
$resolver->addAllowedTypes('max_subject_width', ['int']);
$resolver->addAllowedTypes('case_insensitive', ['bool']);
$resolver->addAllowedTypes('multiline', ['bool']);
$resolver->addAllowedTypes('matchers', ['array']);
$resolver->addAllowedTypes('additional_modifiers', ['string']);
return $resolver;
}
public function __construct(GitRepository $repository)
{
$this->repository = $repository;
$this->config = new EmptyTaskConfig();
}
public function getConfig(): TaskConfigInterface
{
return $this->config;
}
public function withConfig(TaskConfigInterface $config): TaskInterface
{
$new = clone $this;
$new->config = $config;
return $new;
}
public function canRunInContext(ContextInterface $context): bool
{
return $context instanceof GitCommitMsgContext;
}
public function run(ContextInterface $context): TaskResultInterface
{
assert($context instanceof GitCommitMsgContext);
$config = $this->getConfig()->getOptions();
$commitMessage = $context->getCommitMessage();
$exceptions = [];
if (!(bool) $config['allow_empty_message'] && '' === trim($commitMessage)) {
return TaskResult::createFailed(
$this,
$context,
'Commit message should not be empty.'
);
}
if ((bool) $config['enforce_capitalized_subject'] && !$this->subjectIsCapitalized($context)) {
return TaskResult::createFailed(
$this,
$context,
'Subject should start with a capital letter.'
);
}
if ((bool) $config['enforce_single_lined_subject'] && !$this->subjectIsSingleLined($context)) {
return TaskResult::createFailed(
$this,
$context,
'Subject should be one line and followed by a blank line.'
);
}
if ((bool) $config['enforce_no_subject_punctuations'] && $this->subjectHasPunctuations($context)) {
return TaskResult::createFailed(
$this,
$context,
'Please omit all punctuations from commit message subject.'
);
}
if ((bool) $config['enforce_no_subject_trailing_period'] && $this->subjectHasTrailingPeriod($context)) {
return TaskResult::createFailed(
$this,
$context,
'Please omit trailing period from commit message subject.'
);
}
if ($this->enforceTypeScopeConventions()) {
try {
$this->checkTypeScopeConventions($context);
} catch (RuntimeException $e) {
$exceptions[] = $e->getMessage();
}
}
foreach ($config['matchers'] as $ruleName => $rule) {
try {
$this->runMatcher($config, $commitMessage, $rule, (string) $ruleName);
} catch (RuntimeException $e) {
$exceptions[] = $e->getMessage();
}
}
if (\count($exceptions)) {
return TaskResult::createFailed(
$this,
$context,
implode(PHP_EOL, $exceptions).PHP_EOL.sprintf(
'Original commit message: %s%s',
PHP_EOL,
$commitMessage
)
);
}
return $this->enforceTextWidth($context);
}
private function enforceTextWidth(GitCommitMsgContext $context): TaskResult
{
$commitMessage = $context->getCommitMessage();
$config = $this->getConfig()->getOptions();
if ('' === trim($commitMessage)) {
return TaskResult::createPassed($this, $context);
}
$errors = [];
$lines = $this->getCommitMessageLinesWithoutComments($commitMessage);
$subject = rtrim($lines[0]);
if ($config['max_subject_width'] > 0) {
$maxSubjectWidth = $config['max_subject_width'] + $this->getSpecialPrefixLength($subject);
if (mb_strlen($subject) > $maxSubjectWidth) {
$errors[] = sprintf('Please keep the subject <= %u characters.', $maxSubjectWidth);
}
}
if ($config['max_body_width'] > 0) {
foreach (\array_slice($lines, 2) as $index => $line) {
if (mb_strlen(rtrim($line)) > $config['max_body_width']) {
$errors[] = sprintf(
'Line %u of commit message has > %u characters.',
(int)($index) + 3,
$config['max_body_width']
);
}
}
}
if (\count($errors)) {
return TaskResult::createFailed($this, $context, implode(PHP_EOL, $errors));
}
return TaskResult::createPassed($this, $context);
}
private function runMatcher(array $config, string $commitMessage, string $rule, string $ruleName): void
{
$regex = new Regex($rule);
if ((bool) $config['case_insensitive']) {
$regex->addPatternModifier('i');
}
if ((bool) $config['multiline']) {
$regex->addPatternModifier('m');
}
$additionalModifiersArray = array_filter(str_split((string) $config['additional_modifiers']));
array_map([$regex, 'addPatternModifier'], $additionalModifiersArray);
if (!preg_match((string) $regex, $commitMessage)) {
throw new RuntimeException("Rule not matched: \"$ruleName\" $rule");
}
}
private function getSpecialPrefixLength(string $string): int
{
if (1 !== preg_match('/^(fixup|squash)! /', $string, $match)) {
return 0;
}
return mb_strlen($match[0]);
}
private function subjectHasPunctuations(GitCommitMsgContext $context): bool
{
$subjectLine = $this->getSubjectLine($context);
if (trim($subjectLine) === '') {
return false;
}
return Str::containsOneOf($subjectLine, ['.', '!', '?', ',']);
}
private function subjectHasTrailingPeriod(GitCommitMsgContext $context): bool
{
$subjectLine = $this->getSubjectLine($context);
if ('' === trim($subjectLine)) {
return false;
}
if ('.' !== mb_substr(rtrim($subjectLine), -1)) {
return false;
}
return true;
}
private function subjectIsCapitalized(GitCommitMsgContext $context): bool
{
$commitMessage = $context->getCommitMessage();
if ('' === trim($commitMessage)) {
return true;
}
$lines = $this->getCommitMessageLinesWithoutComments($commitMessage);
$subject = array_reduce($lines, function (?string $subject, string $line) {
if (null !== $subject) {
return $subject;
}
if ('' === trim($line)) {
return null;
}
return $line;
}, null);
if (null === $subject || 1 !== preg_match('/^[[:punct:]]*(.)/u', $subject, $match)) {
return false;
}
$firstLetter = $match[1] ?? '';
return !(1 !== preg_match('/^(fixup|squash)!/u', $subject) && 1 !== preg_match('/[[:upper:]]/u', $firstLetter));
}
private function subjectIsSingleLined(GitCommitMsgContext $context): bool
{
$commitMessage = $context->getCommitMessage();
if ('' === trim($commitMessage)) {
return true;
}
$lines = $this->getCommitMessageLinesWithoutComments($commitMessage);
return !(array_key_exists(1, $lines) && '' !== trim($lines[1]));
}
private function getCommitMessageLinesWithoutComments(string $commitMessage): array
{
$commentChar = trim($this->repository->tryToRunWithFallback(
function (): ?string {
return $this->repository->run('config', ['--get', 'core.commentChar']);
},
'#'
));
$lines = preg_split('/\R/u', $commitMessage);
$everythingBelowWillBeIgnored = false;
return array_values(array_filter(
$lines,
function (string $line) use (&$everythingBelowWillBeIgnored, $commentChar) {
if (mb_stripos($line, $commentChar.' Everything below it will be ignored.') !== false) {
$everythingBelowWillBeIgnored = true;
return false;
}
return 0 !== strpos($line, $commentChar) && !$everythingBelowWillBeIgnored;
}
));
}
private function enforceTypeScopeConventions(): bool
{
$config = $this->getConfig()->getOptions();
$conventionsKeys = array_keys($config['type_scope_conventions']);
return in_array('types', $conventionsKeys) || in_array('scopes', $conventionsKeys);
}
/**
* @throws RuntimeException
*/
private function checkTypeScopeConventions(GitCommitMsgContext $context): void
{
$config = $this->getConfig()->getOptions();
$subjectLine = $this->getSubjectLine($context);
$types = isset($config['type_scope_conventions']['types'])
? $config['type_scope_conventions']['types']
: [];
$scopes = isset($config['type_scope_conventions']['scopes'])
? $config['type_scope_conventions']['scopes']
: [];
$specialPrefix = '(?:(?:fixup|squash)! )?';
$typesPattern = '([a-zA-Z0-9]+)';
$scopesPattern = '(:\s|(\(.+\)?:\s))';
$subjectPattern = isset($config['type_scope_conventions']['subject_pattern'])
? $config['type_scope_conventions']['subject_pattern']
: '([a-zA-Z0-9-_ #@\'\/\\"]+)';
$mergePattern =
'(Merge branch|tag \'.+\'(?:\s.+)?|Merge remote-tracking branch \'.+\'|Merge pull request #\d+\s.+)';
if (count($types) > 0) {
$types = implode('|', $types);
$typesPattern = '(' . $types . ')';
}
if (count($scopes) > 0) {
$scopes = implode('|', $scopes);
$scopesPattern = '(:\s|(\((?:' . $scopes . ')\)?:\s))';
}
$rule = '/^' . $specialPrefix . $typesPattern . $scopesPattern . $subjectPattern . '|' . $mergePattern . '/';
try {
$this->runMatcher($config, $subjectLine, $rule, 'Invalid Type/Scope Format');
} catch (RuntimeException $e) {
throw $e;
}
}
/**
* Gets a clean subject line from the commit message
*
* @param $context
* @return string
*/
private function getSubjectLine(GitCommitMsgContext $context)
{
$commitMessage = $context->getCommitMessage();
$lines = $this->getCommitMessageLinesWithoutComments($commitMessage);
return (string) $lines[0];
}
}