Add release script

CHANGELOG.md

@@ -4,7 +4,8 @@
 [v6.0.4...master](https://github.com/deployphp/deployer/compare/v6.0.4...master)
 
 ### Fixed
-- Fixed `previous_release` param when `release_name` was overrided [#1455]
+- Fixed `previous_release` param when `release_name` was overridden [#1455]
+
 
 ## v6.0.4
 [v6.0.3...v6.0.4](https://github.com/deployphp/deployer/compare/v6.0.3...v6.0.4)

scripts/release

@@ -0,0 +1,53 @@
+#!/usr/bin/env php
+<?php
+/* (c) Anton Medvedev <anton@medv.io>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+require __DIR__ . '/../vendor/autoload.php';
+
+chdir(realpath(__DIR__ . '/..'));
+
+$opt = getopt('v::');
+
+$changelog = file_get_contents('CHANGELOG.md');
+
+$latestVersion = '0.0.0';
+if (preg_match('/## v(.+)/', $changelog, $matches)) {
+    $latestVersion = $matches[1];
+} 
+
+if (array_key_exists('v', $opt)) {
+    $version = $opt['v'];
+    if (!preg_match('/^\d+\.\d+\.\d+(-[\d\w\.]+)?$/i', $version)) {
+        die("Version number must follow semantic versioning.\n");
+    }
+} else {
+    die("Please, specify verion to release. Latest version is -v$latestVersion\n");
+}
+
+// Next goes bunch of regexs. Now we have three problems.
+// Right solution will be to create a parser what reads 
+// changelog and generates AST, printer which outputs all
+// in desired format. But it will take too much effort.
+// So may be you, {{user_name}}, wish to implement it?
+// 
+// ...back to regexs 👨🏻‍🚀
+
+$changelog = preg_replace('/(?<=## )master/', "v$version", $changelog);
+$changelog = preg_replace('/\[(v.+)master\]\((.+)master\)/', "[$1v$version]($2v$version)", $changelog);
+
+$new = <<<MASTER
+# Changelog
+
+## master
+[v$version...master](https://github.com/deployphp/deployer/compare/v$version...master)
+
+MASTER;
+$changelog = preg_replace('/# Changelog/', $new, $changelog);
+
+file_put_contents('CHANGELOG.md', $changelog);
+
+echo "Updated CHANGELOG.md to v$version.";