[CI] upload the forgejo under test as an artifact for end-to-end

(cherry picked from commit ded1f27ebbae7e5e09973ce15551827cff4a00d1)
(cherry picked from commit e452b184557bf170688ca042b3a01af7a233d2ed)

[CI] upload the forgejo under test as an artifact for end-to-end (squash) use forgejo-pr

cascade a PR to https://code.forgejo.org/forgejo/end-to-end on the
forgejo-pr branch which will only run end-to-end tests relevant to a
Forgejo PR and not the entire end-to-end suite.

(cherry picked from commit 011de92174ad29ee9b3b72d5c845b52ef229f66f)
(cherry picked from commit 50290011b255e2a548ed1ef608af947cfc557288)

[CI] upload the forgejo under test as an artifact for end-to-end (squash) after build

(cherry picked from commit ba35f42e3d1d4ca0132d3edd09c4647940cf5e17)
(cherry picked from commit ddf43faecb9a833137dbbb783fddf0b4765b0e87)

[CI] upload the forgejo under test as an artifact for end-to-end (squash) do not display env

(cherry picked from commit d186ec3db49d8a23d4eb6328e6393c107b166a79)
(cherry picked from commit 20e9d4bffb90260dc9699db81ccdd23dd695f8da)

[CI] upload the forgejo under test as an artifact for end-to-end (squash) merge feature branches

(cherry picked from commit 83cd7a3ad992202c02510e807bdea0f1ab865461)
(cherry picked from commit 75fd819ee5161ad9591fe95744e538d805dfb9bb)
(cherry picked from commit c6d021692951b1b2dc1209422df766becaa8fe22)
(cherry picked from commit 4a0ee31376ce60f498a0844e0aa4dd5f5bf321a4)

.forgejo/cascading-pr-end-to-end

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+set -ex
+
+end_to_end=$1
+end_to_end_pr=$2
+forgejo=$3
+forgejo_pr=$4
+
+head_url=$(jq --raw-output .head.repo.html_url < $forgejo_pr)
+test "$head_url" != null
+branch=$(jq --raw-output .head.ref < $forgejo_pr)
+test "$branch" != null
+cd $end_to_end
+echo $head_url $branch 7.0.0+0-gitea-1.22.0 > forgejo/sources/1.22
+date > last-upgrade
+
+base_url=$(jq --raw-output .base.repo.html_url < $forgejo_pr)
+test "$base_url" != null
+test "$GITHUB_RUN_NUMBER"
+echo $base_url/actions/runs/$GITHUB_RUN_NUMBER/artifacts/forgejo > forgejo/binary-url

.forgejo/workflows/cascade-setup-end-to-end.yml

@@ -0,0 +1,82 @@
+# SPDX-License-Identifier: MIT
+on:
+  pull_request_target:
+    types:
+      - labeled
+
+env:
+  FEATURE_BRANCHES: "privacy i18n moderation branding dependency"
+
+jobs:
+  info:
+    runs-on: docker
+    container:
+      image: node:20-bookworm
+    steps:
+      - name: event
+        run: |
+          echo github.event.pull_request.head.repo.fork = ${{ github.event.pull_request.head.repo.fork }}
+          echo github.event.action = ${{ github.event.action }}
+          echo github.event.pull_request.merged = ${{ github.event.pull_request.merged }}
+          echo github.event.pull_request.labels.*.name
+          cat <<'EOF'
+          ${{ toJSON(github.event.pull_request.labels.*.name) }}
+          EOF
+
+  build:
+    if: github.event.action == 'label_updated' && contains(github.event.pull_request.labels.*.name, 'run-end-to-end-tests')
+    runs-on: docker
+    container:
+      image: 'docker.io/node:20-bookworm'
+    steps:
+      - uses: https://code.forgejo.org/actions/checkout@v3
+        with:
+          fetch-depth: '0'
+          show-progress: 'false'
+      - name: adduser forgejo
+        run: |
+          git config --add safe.directory '*'
+          git config user.email "you@example.com"
+          git config user.name "Your Name"
+          adduser --quiet --comment forgejo --disabled-password forgejo
+          chown -R forgejo:forgejo .
+      - name: merge feature branches
+        run: |
+          su forgejo -c 'set -ex ; for b in ${{ env.FEATURE_BRANCHES }} ; do git merge -m $b origin/forgejo-$b ; done'
+      - uses: https://code.forgejo.org/actions/setup-go@v4
+        with:
+          go-version: ">=1.21"
+      - name: make deps-backend
+        run: |
+          su forgejo -c 'make deps-backend'
+      - name: make forgejo
+        run: |
+          su forgejo -c 'make generate-backend static-executable && ln gitea forgejo'
+        env:
+          TAGS: bindata sqlite sqlite_unlock_notify
+      - uses: actions/upload-artifact@v3
+        with:
+          name: forgejo
+          path: forgejo
+
+  cascade:
+    if: github.event.action == 'label_updated' && contains(github.event.pull_request.labels.*.name, 'run-end-to-end-tests')
+    needs: [build]
+    runs-on: docker
+    container:
+      image: node:20-bookworm
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/cascading-pr@v1
+        with:
+          origin-url: ${{ env.GITHUB_SERVER_URL }}
+          origin-repo: ${{ github.repository }}
+          origin-token: ${{ secrets.END_TO_END_CASCADING_PR_ORIGIN }}
+          origin-pr: ${{ github.event.pull_request.number }}
+          destination-url: https://code.forgejo.org
+          destination-fork-repo: cascading-pr/end-to-end
+          destination-repo: forgejo/end-to-end
+          destination-branch: forgejo-pr
+          destination-token: ${{ secrets.END_TO_END_CASCADING_PR_DESTINATION }}
+          close-merge: true
+          update: .forgejo/cascading-pr-end-to-end