From aa60ed6f492a45b94e31bf61b7b8376c8f521ce7 Mon Sep 17 00:00:00 2001
From: Victor Seva <linuxmaniac@torreviejawireless.org>
Date: Fri, 13 Oct 2023 11:21:11 +0200
Subject: [PATCH] github: action to refresh builder-alpine.${ALPINE_BRANCH}
 image

---
 .github/dependabot.yml        |  9 ++++++
 .github/workflows/builder.yml | 53 +++++++++++++++++++++++++++++++++++
 alpine/hooks/pre_build        | 22 ++++++++++-----
 3 files changed, 77 insertions(+), 7 deletions(-)
 create mode 100644 .github/dependabot.yml
 create mode 100644 .github/workflows/builder.yml

diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..775cd54
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,9 @@
+---
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    commit-message:
+      prefix: "github: [skip ci]"
diff --git a/.github/workflows/builder.yml b/.github/workflows/builder.yml
new file mode 100644
index 0000000..06c9fa6
--- /dev/null
+++ b/.github/workflows/builder.yml
@@ -0,0 +1,53 @@
+---
+name: alpine docker builder image
+on:
+  push:
+    branches:
+      - master
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+env:
+  IMAGE_NAME: kamailio-ci
+  SOURCE_BRANCH: ${{ github.ref_name }}
+  DOCKER_REPO: ghcr.io/kamailio/kamailio-ci
+  REFRESH_ONLY: true
+
+jobs:
+  x86_64:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write 
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 2
+
+    - name: print latest_commit
+      run: echo ${{ github.sha }}
+
+    - name: Get changed files
+      id: changed-files
+      uses: tj-actions/changed-files@v39
+      with:
+        since_last_remote_commit: true
+
+    - name: Dockerfile.builder
+      id: changed-files-builder
+      uses: tj-actions/changed-files@v39
+      with:
+        files: alpine/Dockerfile.builder
+
+    - name: Login to GitHub Container Registry
+      if: steps.changed-files-builder.outputs.any_changed == 'true'
+      uses: docker/login-action@v3
+      with:
+        registry: ghcr.io
+        username: ${{ github.repository_owner }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: generate builder
+      if: steps.changed-files-builder.outputs.any_changed == 'true'
+      run: |
+        ./alpine/hooks/pre_build
diff --git a/alpine/hooks/pre_build b/alpine/hooks/pre_build
index 6c814af..abf4292 100755
--- a/alpine/hooks/pre_build
+++ b/alpine/hooks/pre_build
@@ -5,19 +5,22 @@ set -x
 # Setting environment vars
 ALPINE_BRANCH="${ALPINE_BRANCH:-latest}"
 DOCKER_REPO="${DOCKER_REPO:-kamailio/kamailio-ci}"
+REFRESH_ONLY="${REFRESH_ONLY:-false}"
 
 if [ "$SOURCE_BRANCH" = "master" ];then
     ALPINE_BRANCH="edge"
 fi
 
 refresh_builder() {
-    docker pull alpine:${ALPINE_BRANCH} || true
-    docker pull ${DOCKER_REPO}:builder-alpine.${ALPINE_BRANCH} || true
-    local SHA_ALPINE=$(docker image inspect -f '{{index .RootFS.Layers 0}}' alpine:${ALPINE_BRANCH})
-    local SHA_BUILDER=$(docker image inspect -f '{{index .RootFS.Layers 0}}' ${DOCKER_REPO}:builder-alpine.${ALPINE_BRANCH})
-    if [ "${SHA_ALPINE}" = "${SHA_BUILDER}" ]; then
-      echo "Builder already use fresh alpine base image. Continue"
-      return 0
+    docker pull alpine:${ALPINE_BRANCH}
+    if ! ${REFRESH_ONLY} ; then
+      docker pull ${DOCKER_REPO}:builder-alpine.${ALPINE_BRANCH}
+      local SHA_ALPINE=$(docker image inspect -f '{{index .RootFS.Layers 0}}' alpine:${ALPINE_BRANCH})
+      local SHA_BUILDER=$(docker image inspect -f '{{index .RootFS.Layers 0}}' ${DOCKER_REPO}:builder-alpine.${ALPINE_BRANCH})
+      if [ "${SHA_ALPINE}" = "${SHA_BUILDER}" ]; then
+        echo "Builder already use fresh alpine base image. Continue"
+        return 0
+      fi
     fi
     sed -i -e "s/alpine:latest/alpine:${ALPINE_BRANCH}/" Dockerfile.builder
     docker build -t ${DOCKER_REPO}:builder-alpine.${ALPINE_BRANCH} --file Dockerfile.builder .
@@ -29,6 +32,11 @@ refresh_builder() {
 echo "=> Refreshing builder image"
 refresh_builder
 
+if ${REFRESH_ONLY} ; then
+    echo "=> REFRESH_ONLY detected, done"
+    return 0
+fi
+
 echo "=> Build Kamailio source code"
 
 if [ "${ALPINE_BRANCH}" = "edge" ]; then