ci: generate changelog automatically, auto increase version number

cicd_scripts/update_changelog.php

@@ -0,0 +1,165 @@
+<?php
+
+/**
+ * This script generates changelog from commit messages
+ * and increases version number.
+ */
+
+function print_usage()
+{
+   fwrite(STDERR,
+    "USAGE:\n"
+         . " php update_changelog.php true/false\n"
+         . "\n"  
+         . " true = is stable, false = is nightly\n"
+         . " When it is stable it prints new version name on output."
+         );         
+}
+
+if ($argc < 2) {
+   fwrite(STDERR, "Invalid arguments:\n");
+   print_usage();
+   exit(1);
+}
+
+if (!in_array($argv[1], ["true", "false"], true)) {
+   fwrite(STDERR, "Invalid arguments:\n");
+   print_usage();
+   exit(1);
+}
+
+$nightly = $argv[1] === "false";
+
+$result = 0;
+exec('git tag -l "version*" --sort=-v:refname', $output, $result);
+$version1 = trim($output[0]);
+$version2 = "HEAD";
+
+if ($result !== 0) {
+    echo "cannot git tag";
+    exit(1);
+}
+
+
+$result = 0;
+exec('git log ' . $version1 . '..' . $version2 . ' --pretty=format:"%s%n%b%n---SPLIT---" --reverse', $output, $result);
+if ($result !== 0) {
+    echo "cannot git log";
+    exit(1);
+}
+
+
+$messages = [];
+$message_lines = [];
+foreach ($output as $line) {
+    $line = trim($line);        
+    if ($line === "---SPLIT---") {
+        $messages[] = $message_lines;
+        $message_lines = [];    
+    } else {
+        $message_lines[] = $line;
+    }
+}
+
+
+$changelog_types = [
+    "feat" => "Features",
+    "fix" => "Bug Fixes",
+    "perf" => "Performance Improvements"
+];                
+
+$changelog = [
+
+];
+
+foreach (array_keys($changelog_types) as $type) {
+    $changelog[$type] = [];
+}
+
+
+foreach ($messages as $message) {
+    $first_line = $message[0];
+
+
+    if (preg_match('/^(?<type>feat|fix|docs|style|refactor|perf|test|build|ci|chore|revert)(\((?<scope>.+)\))?: (?<desc>.+)$/', $first_line, $matches)) {
+        $type = $matches["type"];
+        $scope = $matches["scope"];
+        $desc = $matches["desc"];
+
+        if ($scope !== "") {
+            $desc = $scope . ": " . $desc;
+        }
+
+        if (array_key_exists($type, $changelog_types)) {
+            $changelog[$type][] = $desc;
+        }
+    }
+}       
+
+$result = "";
+$empty_changelog = true;
+foreach ($changelog as $type => $descs) {
+    if (count($descs) === 0) {
+        continue;
+    }
+    $empty_changelog = false;
+    $result .= "\r\n";
+    $result .= "### " . $changelog_types[$type] . "\r\n";
+    foreach ($descs as $desc) {
+        $result .= "- " . $desc . "\r\n";
+    }
+}
+$result = trim($result) . "\r\n";
+
+$changelog_file = "CHANGELOG.md";
+
+$changelog_data = file_get_contents($changelog_file);
+
+$changelog_data = preg_replace('/\r?\n/', "\r\n", $changelog_data);
+
+$after = "\r\n## [";
+
+preg_match('/^version(?<major>[0-9]+)\.(?<minor>[0-9]+)\.(?<patch>[0-9]+)$/', $version1, $matches);
+
+$major = (int) $matches["major"];
+$minor = (int) $matches["minor"];
+$patch = (int) $matches["patch"];
+
+if (count($changelog["feat"]) > 0) {
+    $minor++;
+} else if (count($changelog["fix"]) > 0 || count($changelog["perf"]) > 0) {
+    $patch++;
+} else {
+    $nightly = true;
+}
+
+$new_version = "$major.$minor.$patch";
+
+if ($nightly) {
+    $version_title = "Unreleased";
+    $version_date_add = "";
+} else {
+    $version_title = $new_version;
+    $version_date_add = " - " . date("Y-m-d");
+}
+
+$insert = "\r\n## [$version_title]$version_date_add\r\n" . $result;
+
+$after_pos = mb_strpos($changelog_data, $after);
+if ($after_pos !== false) {
+    $changelog_data = mb_substr($changelog_data, 0, $after_pos) . $insert . mb_substr($changelog_data, $after_pos);
+}
+
+file_put_contents($changelog_file, $changelog_data);    
+
+if ($empty_changelog) {
+    echo "empty";
+    exit;
+}
+
+if (!$nightly) {
+    echo $version_title;
+    exit;
+}
+
+echo "nightly";