From 4bca31937cb42b62561723f5e380e847b0605609 Mon Sep 17 00:00:00 2001
From: nimalank7 <nimalan.kirubakaran@digital.cabinet-office.gov.uk>
Date: Wed, 22 Nov 2023 12:14:42 +0000
Subject: [PATCH] Add build-image-on-tags and create-pr-on-tags actions

Description:
- Add action to build docker image when a tag is pushed
- Add action to create a PR against govuk-dgu-charts repo once the build-image-on-tags pipeline is completed
---
 .github/workflows/build-image-on-tags.yaml | 29 ++++++++++++++++++++++
 .github/workflows/create-pr-on-tags.yaml   | 23 +++++++++++++++++
 docker/build-image.sh                      |  4 +++
 3 files changed, 56 insertions(+)
 create mode 100644 .github/workflows/build-image-on-tags.yaml
 create mode 100644 .github/workflows/create-pr-on-tags.yaml

diff --git a/.github/workflows/build-image-on-tags.yaml b/.github/workflows/build-image-on-tags.yaml
new file mode 100644
index 00000000..9adcc2b0
--- /dev/null
+++ b/.github/workflows/build-image-on-tags.yaml
@@ -0,0 +1,29 @@
+name: Build and push images on tags
+
+on:
+  push:
+    tags:
+      - 'k[0-9]+.[0-9]+.[0-9]+'
+
+jobs:
+  build_and_push:
+    name: datagovuk_find
+    runs-on: ubuntu-latest
+    permissions:
+      packages: write
+    steps:
+      - name: Login to GHCR
+        uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a  # v2.1.0
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ inputs.gitRef }}
+      - name: Build and push images
+        env:
+          APP: datagovuk_find
+          ARCH: amd64
+          GH_REF: ${{ github.ref_name }}
+        run: ./docker/build-image.sh
diff --git a/.github/workflows/create-pr-on-tags.yaml b/.github/workflows/create-pr-on-tags.yaml
new file mode 100644
index 00000000..c2109d8e
--- /dev/null
+++ b/.github/workflows/create-pr-on-tags.yaml
@@ -0,0 +1,23 @@
+name: Create charts PR on tags creation
+
+on:
+  workflow_dispatch:
+  workflow_run:
+    workflows: [ "Build and push images on tags" ]
+    types:
+      - completed
+
+jobs:
+  create_pr:
+    name: Create charts PR on tags creation
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set GH_REF
+        # Change back to git tag once we no longer need the k versions
+        run: echo "GH_REF=`echo $(git fetch -t -q && git tag -l "k*" | sort --version-sort | tail -n1)`" >> $GITHUB_ENV
+      - run: bash ./docker/create-pr.sh
+        env:
+          GH_TOKEN: ${{ secrets.PR_GITHUB_TOKEN }}
+          IS_TAG: "true"
+          ENVS: "staging,production"
diff --git a/docker/build-image.sh b/docker/build-image.sh
index 131443df..62bd8f67 100755
--- a/docker/build-image.sh
+++ b/docker/build-image.sh
@@ -12,6 +12,10 @@ build () {
 
 DOCKER_TAG="${GITHUB_SHA}"
 
+if [[ -n ${GH_REF:-} ]]; then
+  DOCKER_TAG="${GH_REF}"
+fi
+
 build "${DOCKER_TAG}"
 
 if [[ -n ${DRY_RUN:-} ]]; then