forgejo/workflows: add issue/PR auto labeler

.forgejo/labeler/labeler.js

@@ -0,0 +1,36 @@
+module.exports = async ({github, context}) => {
+    const title = (context.payload.pull_request?.title || context.payload.issue?.title || '').toLowerCase();
+    const labels = [];
+
+    const kwmap = {
+      'avcodec': 'avcodec',
+      'avdevice': 'avdevice',
+      'avfilter': 'avfilter',
+      'avformat': 'avformat',
+      'avutil': 'avutil',
+      'swresample': 'swresample',
+      'swscale': 'swscale',
+      'fftools': 'CLI'
+    };
+
+    if (context.payload.action === 'opened') {
+        labels.push('new');
+        console.log('Detected label: new');
+    }
+
+    for (const [kw, label] of Object.entries(kwmap)) {
+        if (title.includes(kw)) {
+            labels.push(label);
+            console.log('Detected label: ' + label);
+        }
+    }
+
+    if (labels.length > 0) {
+        await github.rest.issues.addLabels({
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            issue_number: context.payload.pull_request?.number || context.payload.issue?.number,
+            labels: labels,
+        });
+    }
+}

.forgejo/labeler/labeler.yml

@@ -0,0 +1,31 @@
+avcodec:
+  - changed-files:
+    - any-glob-to-any-file: libavcodec/**
+
+avdevice:
+  - changed-files:
+    - any-glob-to-any-file: libavdevice/**
+
+avfilter:
+  - changed-files:
+    - any-glob-to-any-file: libavfilter/**
+
+avformat:
+  - changed-files:
+    - any-glob-to-any-file: libavformat/**
+
+avutil:
+  - changed-files:
+    - any-glob-to-any-file: libavutil/**
+
+swresample:
+  - changed-files:
+    - any-glob-to-any-file: libswresample/**
+
+swscale:
+  - changed-files:
+    - any-glob-to-any-file: libswscale/**
+
+CLI:
+  - changed-files:
+    - any-glob-to-any-file: fftools/**

.forgejo/workflows/autolabel.yml

@@ -0,0 +1,28 @@
+on:
+  pull_request_target:
+    types: [opened, edited, synchronize]
+  issues:
+    types: [opened, edited]
+
+permissions:
+  contents: read
+  pull-requests: write
+  issues: write
+
+jobs:
+  pr_labeler:
+    runs-on: utilities
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Label by file-changes
+        uses: https://github.com/actions/labeler@v5
+        if: ${{ forge.event_name == 'pull_request_target' }}
+        with:
+          configuration-path: .forgejo/labeler/labeler.yml
+      - name: Label by title-match
+        uses: https://github.com/actions/github-script@v7
+        with:
+          script: |
+            const script = require('.forgejo/labeler/labeler.js')
+            await script({github, context})