ci: bidirectional mirror between GitHub and Gitea

.gitea/workflows/mirror.yml

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+name: Mirror to GitHub
+
+on:
+  push:
+    branches: [main]
+
+concurrency:
+  group: mirror
+  cancel-in-progress: true
+
+jobs:
+  mirror:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Reconcile with GitHub
+        run: bash scripts/mirror.sh
+        env:
+          MIRROR_URL: https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/SinachPat/wursor.git

.github/workflows/mirror.yml

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+name: Mirror to Gitea
+
+on:
+  push:
+    branches: [main]
+
+concurrency:
+  group: mirror
+  cancel-in-progress: true
+
+jobs:
+  mirror:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Reconcile with Gitea
+        run: bash scripts/mirror.sh
+        env:
+          MIRROR_URL: https://x-access-token:${{ secrets.GITEA_TOKEN }}@git.weown.tools/Wursor/s004.git

scripts/mirror.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+BRANCH="${BRANCH:-main}"
+
+git config user.name  "mirror-bot"
+git config user.email "mirror-bot@noreply.local"
+
+git remote remove mirror 2>/dev/null || true
+git remote add mirror "$MIRROR_URL"
+
+git fetch origin "$BRANCH"
+git fetch mirror "$BRANCH"
+
+if git rev-parse --verify -q "mirror/$BRANCH" >/dev/null; then
+  if ! git merge-base --is-ancestor "mirror/$BRANCH" HEAD; then
+    git merge --no-edit "mirror/$BRANCH"
+  fi
+fi
+
+git push origin "HEAD:$BRANCH"
+git push mirror "HEAD:$BRANCH"