feat(tools): Add script to generate changelog

tools/.gitignore

@@ -0,0 +1 @@
+node_modules/

tools/generate-release-notes.js

@@ -0,0 +1,66 @@
+import {Octokit} from 'octokit';
+
+const milestone = +process.argv[2];
+
+const octokit = new Octokit({
+    auth: process.env.GITHUB_TOKEN,
+});
+
+// get issues for milestone
+async function getIssues(milestone) {
+    return octokit.paginate(
+        'GET /repos/{owner}/{repo}/issues',
+        {
+            owner: 'fujaba',
+            repo: 'fulib.org',
+            state: 'closed',
+            milestone,
+        },
+    );
+}
+
+
+function generateReleaseBody(issues) {
+    // Each issue is a pull request with a body like this:
+    // ```
+    // ## New Changes
+    // + ...
+    // ## Improvements
+    // * ...
+    // ## Bugfixes
+    // * ...
+    // ```
+
+    // Group by these sections and append the issue number at the end of each bullet point.
+    const sections = {
+        'General': [],
+        'New Features': [],
+        'Improvements': [],
+        'Bugfixes': [],
+        'Removals': [],
+    };
+    for (const issue of issues) {
+        const body = issue.body;
+        const lines = body.split('\r\n');
+        let section = null;
+        for (const line of lines) {
+            if (line.startsWith('##')) {
+                section = line.substr(3);
+                if (!sections[section]) {
+                    sections[section] = [];
+                }
+            } else if (section && (line.startsWith('+') || line.startsWith('*') || line.startsWith('-'))) {
+                sections[section].push(line + ' #' + issue.number);
+            }
+        }
+    }
+
+    // Append the sections to the release body.
+    return Object.entries(sections)
+        .filter(section => section[1].length > 0)
+        .map(section => `## ${section[0]}\n\n${section[1].join('\n')}`)
+        .join('\n\n');
+}
+
+const issues = await getIssues(milestone);
+console.log(generateReleaseBody(issues));

tools/package.json

@@ -0,0 +1,6 @@
+{
+	"type": "module",
+	"dependencies": {
+		"octokit": "^3.1.2"
+	}
+}