Parse commit log with loophp/collection

parse-commit-log.php

<?php

declare(strict_types=1);

include 'vendor/autoload.php';

use loophp\collection\Collection;
use loophp\collection\Contract\Collection as CollectionInterface;

$commandStream = static function (string $command): Generator {
    $fh = popen($command, 'r');

    while (false !== $line = fgets($fh)) {
        yield $line;
    }

    fclose($fh);
};

$buildIfThenElseCallbacks = static function (string $lineStart): array {
    return [
        static function ($line) use ($lineStart): bool {
            return \is_string($line) && 0 === mb_strpos($line, $lineStart);
        },
        static function ($line) use ($lineStart): array {
            [, $line] = explode($lineStart, $line);

            return [
                sprintf(
                    '%s:%s',
                    mb_strtolower(str_replace(':', '', $lineStart)),
                    trim($line)
                ),
            ];
        },
    ];
};

$c = Collection::fromIterable($commandStream('git log'))
    ->map(
        static function (string $value): string {
            return trim($value);
        }
    )
    ->compact('', ' ', "\n")
    ->ifThenElse(...$buildIfThenElseCallbacks('commit'))
    ->ifThenElse(...$buildIfThenElseCallbacks('Date:'))
    ->ifThenElse(...$buildIfThenElseCallbacks('Author:'))
    ->ifThenElse(...$buildIfThenElseCallbacks('Merge:'))
    ->ifThenElse(...$buildIfThenElseCallbacks('Signed-off-by:'))
    ->split(
        static function ($value): bool {
            return \is_array($value) ?
                (1 === preg_match('/^commit:\b[0-9a-f]{5,40}\b/', $value[0])) :
                false;
        }
    )
    ->map(
        static function (array $value): CollectionInterface {
            return Collection::fromIterable($value);
        }
    )
    ->map(
        static function (CollectionInterface $collection): CollectionInterface {
            return $collection
                ->group(
                    static function ($value): ?string {
                        return \is_array($value) ? 'headers' : null;
                    }
                )
                ->group(
                    static function ($value): ?string {
                        return \is_string($value) ? 'log' : null;
                    }
                )
                ->ifThenElse(
                    static function ($value, $key): bool {
                        return 'headers' === $key;
                    },
                    static function ($value, $key): array {
                        return Collection::fromIterable($value)
                            ->unwrap()
                            ->associate(
                                static function ($key, string $value): string {
                                    [$key, $line] = explode(':', $value, 2);

                                    return $key;
                                },
                                static function ($key, string $value): string {
                                    [$key, $line] = explode(':', $value, 2);

                                    return trim($line);
                                }
                            )
                            ->all();
                    }
                );
        }
    )
    ->map(
        static function (CollectionInterface $collection): CollectionInterface {
            return $collection
                ->flatten()
                ->group(
                    static function ($value, $key): ?string {
                        if (is_numeric($key)) {
                            return 'log';
                        }

                        return null;
                    }
                );
        }
    )
    ->map(
        static function (CollectionInterface $collection): array {
            return $collection->all();
        }
    )
    ->limit(52);

print_r($c->all());
/**
    ...

    [43] => Array
        (
            [commit] => 84e63813ba8a0fdecb2b07275b892aee695cce0e
            [author] => Pol Dellaiera <pol.dellaiera@protonmail.com>
            [date] => Thu Aug 20 22:09:09 2020 +0200
            [log] => Array
                (
                    [0] => Update Split operation.
                )

        )

    [44] => Array
        (
            [commit] => d1be59ef01651a7c7794175fe5b2d88e3e58e353
            [author] => Pol Dellaiera <pol.dellaiera@protonmail.com>
            [date] => Thu Aug 20 22:00:07 2020 +0200
            [log] => Array
                (
                    [0] => Add new example.
                )

        )

    [45] => Array
        (
            [commit] => e716b854527e576d3e9f76455d0f5f8dfe20bf17
            [author] => Pol Dellaiera <pol.dellaiera@protonmail.com>
            [date] => Sun Aug 16 16:12:53 2020 +0200
            [log] => Array
                (
                    [0] => Update typing information.
                )

        )

    [46] => Array
        (
            [commit] => 81b7a6f546848812b74a12309d7e701cbe7536e7
            [author] => Pol Dellaiera <pol.dellaiera@protonmail.com>
            [date] => Sun Aug 16 09:04:19 2020 +0200
            [log] => Array
                (
                    [0] => Update typing information.
                )

        )

    [47] => Array
        (
            [commit] => 119cdfeb092b31970eac5a98f56e52d4f4ee8e69
            [author] => Pol Dellaiera <pol.dellaiera@protonmail.com>
            [date] => Sat Aug 15 23:02:15 2020 +0200
            [log] => Array
                (
                    [0] => Add missing return statements.
                )

        )

    [48] => Array
        (
            [commit] => 1c9e929919e9482bec517aa746559d63071c79f2
            [author] => Pol Dellaiera <pol.dellaiera@protonmail.com>
            [date] => Sat Aug 15 21:57:01 2020 +0200
            [log] => Array
                (
                    [0] => Update Implode transformation.
                )

        )

    [49] => Array
        (
            [commit] => cece391c57ab7800246fc5ebd788f0ec4c738322
            [author] => Pol Dellaiera <pol.dellaiera@protonmail.com>
            [date] => Sat Aug 15 21:56:31 2020 +0200
            [log] => Array
                (
                    [0] => Update FoldLeft/FoldRight transformations.
                )

        )

    [50] => Array
        (
            [commit] => ddde5cc6f1dd14ac079b68c58bb2dd3f68aac8ee
            [author] => Pol Dellaiera <pol.dellaiera@protonmail.com>
            [date] => Sat Aug 15 07:58:56 2020 +0200
            [log] => Array
                (
                    [0] => Update Last operation.
                )

        )

    [51] => Array
        (
            [commit] => e6e7116b7b75a8fbc4c50dfddd196c26c01cd496
            [merge] => e6b25ac c5ae61a
            [author] => Pol Dellaiera <pol.dellaiera@protonmail.com>
            [date] => Fri Aug 14 20:50:05 2020 +0200
            [log] => Array
                (
                    [0] => Merge pull request #16 from loophp/dependabot/github_actions/actions/create-release-v1.1.3
                    [1] => Bump actions/create-release from v1.1.2 to v1.1.3
                )

        )

)
*/