deployphp / deployer

<?php

namespace Deployer;

use Deployer\Exception\Exception;

use Deployer\Support\Csv;

/**

 * Name of folder in releases.

 */

set('release_name', function () {

    $list = get('releases_list');

    // Filter out anything that does not look like a release.

    $list = array_filter($list, function ($release) {

        return preg_match('/^[\d\.]+$/', $release);

    });

    $nextReleaseNumber = 1;

    if (count($list) > 0) {

        $nextReleaseNumber = (int)max($list) + 1;

    }

    return (string)$nextReleaseNumber;

});

/**

 * Return list of releases on host.

 */

set('releases_list', function () {

    cd('{{deploy_path}}');

    // If there is no releases return empty list.

    if (!test('[ -d releases ] && [ "$(ls -A releases)" ]')) {

        return [];

    }

    // Will list only dirs in releases.

    $list = explode("\n", run('cd releases && ls -t -1 -d */'));

    // Prepare list.

    $list = array_map(function ($release) {

        return basename(rtrim(trim($release), '/'));

    }, $list);

    $releases = []; // Releases list.

    // Collect releases based on .dep/releases info.

    // Other will be ignored.

    if (test('[ -f .dep/releases ]')) {

        $keepReleases = get('keep_releases');

        if ($keepReleases === -1) {

            $csv = run('cat .dep/releases');

        } else {

            // Instead of `tail -n` call here can be `cat` call,

            // but on hosts with a lot of deploys (more 1k) it

            // will output a really big list of previous releases.

            // It spoils appearance of output log, to make it pretty,

            // we limit it to `n*2 + 5` lines from end of file (15 lines).

            // Always read as many lines as there are release directories.

            $csv = run("tail -n " . max(count($releases), ($keepReleases * 2 + 5)) . " .dep/releases");

        }

        $metainfo = Csv::parse($csv);

        for ($i = count($metainfo) - 1; $i >= 0; --$i) {

            if (is_array($metainfo[$i]) && count($metainfo[$i]) >= 2) {

                list(, $release) = $metainfo[$i];

                $index = array_search($release, $list, true);

                if ($index !== false) {

                    $releases[] = $release;

                    unset($list[$index]);

                }

            }

        }

    }

    return $releases;

});

/**

 * Return release path.

 */

set('release_path', function () {

    $releaseExists = test('[ -h {{deploy_path}}/release ]');

    if ($releaseExists) {

        $link = run("readlink {{deploy_path}}/release");

        return substr($link, 0, 1) === '/' ? $link : get('deploy_path') . '/' . $link;

    } else {

        throw new Exception(parse('The "release_path" ({{deploy_path}}/release) does not exist.'));

    }

});

desc('Prepare release. Clean up unfinished releases and prepare next release');

task('deploy:release', function () {

    cd('{{deploy_path}}');

    // Clean up if there is unfinished release

    $previousReleaseExist = test('[ -h release ]');

    if ($previousReleaseExist) {

        run('rm -rf "$(readlink release)"'); // Delete release

        run('rm release'); // Delete symlink

    }

    // We need to get releases_list at same point as release_name,

    // as standard release_name's implementation depends on it and,

    // if user overrides it, we need to get releases_list manually.

    $releasesList = get('releases_list');

    $releaseName = get('release_name');

    // Fix collisions

    $i = 0;

    while (test("[ -d {{deploy_path}}/releases/$releaseName ]")) {

        $releaseName .= '.' . ++$i;

        set('release_name', $releaseName);

    }

    $releasePath = parse("{{deploy_path}}/releases/{{release_name}}");

    // Metainfo.

    $date = run('date +"%Y%m%d%H%M%S"');

    // Save metainfo about release

    run("echo '$date,{{release_name}}' >> .dep/releases");

    // Make new release

    run("mkdir -p $releasePath");

    run("{{bin/symlink}} $releasePath {{deploy_path}}/release");

    // Add to releases list

    array_unshift($releasesList, $releaseName);

    set('releases_list', $releasesList);

    // Set previous_release

    if (isset($releasesList[1])) {

        set('previous_release', "{{deploy_path}}/releases/{$releasesList[1]}");

    }

});