new(ci): add RC/prerelease support

Signed-off-by: Luca Guerra <luca@guerra.sh>

.github/workflows/release.yaml

@@ -2,7 +2,8 @@ name: Release Packages and Docker images
 on:
   push:
     tags:
-      - '[0-9]+.[0-9]+.[0-9]+'
+      - '[0-9]+.[0-9]+.[0-9]+'   # final release
+      - '[0-9]+.[0-9]+.[0-9]+-*' # prerelease/RC
 
 # Checks if any concurrent jobs is running for release CI and eventually cancel it.
 concurrency:
@@ -10,6 +11,36 @@ concurrency:
   cancel-in-progress: true  
 
 jobs:
+  release-settings:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Get latest release
+        uses: rez0n/actions-github-release@v2.0
+        id: latest_release
+        env:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          repository: ${{ github.repository }}
+          type: "stable"
+
+      - name: Get settings for this release
+        id: get_settings
+        shell: python
+        run: |
+          import os
+          is_prerelease = '-' in '${{ github.ref_name }}'
+
+          # Safeguard: you need to both set "latest" in GH and not have suffixes to overwrite latest
+          is_latest = '${{ steps.latest_release.outputs.release }}' == '${{ github.ref_name }}' and not is_prerelease
+
+          bucket_suffix = '-dev' if is_prerelease else ''
+
+          with open(os.environ['GITHUB_OUTPUT'], 'a') as ofp:
+            print(f'is_latest={is_latest}'.lower(), file=ofp)
+            print(f'bucket_suffix={bucket_suffix}', file=ofp)
+    outputs:
+      is_latest: ${{ steps.get_settings.outputs.is_latest }} 
+      bucket_suffix: ${{ steps.get_settings.outputs.bucket_suffix }}
+
   build-packages:
     uses: falcosecurity/falco/.github/workflows/reusable_build_packages.yaml@master
     with:
@@ -26,6 +57,7 @@ jobs:
     needs: [build-packages, build-packages-arm64]
     uses: falcosecurity/falco/.github/workflows/reusable_publish_packages.yaml@master
     with:
+      bucket_suffix: ${{ steps.get_settings.outputs.bucket_suffix }}
       version: ${{ needs.build-packages.outputs.version }}
     secrets: inherit
   
@@ -35,6 +67,8 @@ jobs:
     uses: falcosecurity/falco/.github/workflows/reusable_build_docker.yaml@master
     with:
       arch: x86_64
+      is_latest: ${{ needs.release-settings.outputs.is_latest == 'true' }}
+      bucket_suffix: ${{ steps.get_settings.outputs.bucket_suffix }}
       version: ${{ needs.build-packages.outputs.version }}
     secrets: inherit
     
@@ -43,6 +77,8 @@ jobs:
     uses: falcosecurity/falco/.github/workflows/reusable_build_docker.yaml@master
     with:
       arch: aarch64
+      is_latest: ${{ needs.release-settings.outputs.is_latest == 'true' }}
+      bucket_suffix: ${{ steps.get_settings.outputs.bucket_suffix }}
       version: ${{ needs.build-packages.outputs.version }}
     secrets: inherit
 
@@ -50,4 +86,5 @@ jobs:
     needs: [build-docker, build-docker-arm64]
     uses: falcosecurity/falco/.github/workflows/reusable_publish_docker.yaml@master
     secrets: inherit
-    
+    with:
+      is_latest: ${{ needs.release-settings.outputs.is_latest == 'true' }}

.github/workflows/reusable_build_docker.yaml

@@ -15,6 +15,11 @@ on:
         description: 'Falco version extracted from userspace/falco/config_falco.h'
         required: true
         type: string
+      is_latest:
+        description: Update the latest tag with the new image
+        required: false
+        type: boolean
+        default: false
 
 # Here we just build all docker images as tarballs, 
 # then we upload all the tarballs to be later downloaded by reusable_publish_docker workflow.
@@ -69,7 +74,7 @@ jobs:
           outputs: type=docker,dest=/tmp/falco-driver-loader-${{ inputs.arch }}.tar  
             
       - name: Build no-driver latest image
-        if: ${{ github.ref_name != 'master' }}
+        if: ${{ inputs.is_latest }}
         uses: docker/build-push-action@v3
         with:
           context: ${{ github.workspace }}/docker/no-driver/
@@ -84,7 +89,7 @@ jobs:
           outputs: type=docker,dest=/tmp/falco-no-driver-latest-${{ inputs.arch }}.tar
             
       - name: Build falco latest image
-        if: ${{ github.ref_name != 'master' }}
+        if: ${{ inputs.is_latest }}
         uses: docker/build-push-action@v3
         with:
           context: ${{ github.workspace }}/docker/falco/
@@ -97,7 +102,7 @@ jobs:
           outputs: type=docker,dest=/tmp/falco-latest-${{ inputs.arch }}.tar
             
       - name: Build falco-driver-loader latest image
-        if: ${{ github.ref_name != 'master' }}
+        if: ${{ inputs.is_latest }}
         uses: docker/build-push-action@v3
         with:
           context: ${{ github.workspace }}/docker/driver-loader/

.github/workflows/reusable_publish_docker.yaml

@@ -1,6 +1,12 @@
 # This is a reusable workflow used by master and release CI
 on:
   workflow_call:
+    inputs:
+      is_latest:
+        description: Update the latest tag with the new image
+        required: false
+        type: boolean
+        default: false
 
 permissions:
   id-token: write
@@ -70,7 +76,7 @@ jobs:
           push: true      
 
       - name: Create and push no-driver latest manifest
-        if: ${{ github.ref_name != 'master' }}
+        if: ${{ inputs.is_latest }}
         uses: Noelware/docker-manifest-action@0.3.1
         with:
           inputs: falcosecurity/falco-no-driver:latest
@@ -78,7 +84,7 @@ jobs:
           push: true
           
       - name: Create and push slim latest manifest
-        if: ${{ github.ref_name != 'master' }}
+        if: ${{ inputs.is_latest }}
         uses: Noelware/docker-manifest-action@0.3.1
         with:
           inputs: falcosecurity/falco:latest-slim
@@ -86,7 +92,7 @@ jobs:
           push: true
           
       - name: Create and push no-driver latest manifest for ecr
-        if: ${{ github.ref_name != 'master' }}
+        if: ${{ inputs.is_latest }}
         uses: Noelware/docker-manifest-action@0.3.1
         with:
           inputs: public.ecr.aws/falcosecurity/falco-no-driver:latest
@@ -94,7 +100,7 @@ jobs:
           push: true
           
       - name: Create and push slim latest manifest for ecr
-        if: ${{ github.ref_name != 'master' }}
+        if: ${{ inputs.is_latest }}
         uses: Noelware/docker-manifest-action@0.3.1
         with:
           inputs: public.ecr.aws/falcosecurity/falco:latest-slim
@@ -116,7 +122,7 @@ jobs:
           push: true    
       
       - name: Create and push falco latest manifest
-        if: ${{ github.ref_name != 'master' }}
+        if: ${{ inputs.is_latest }}
         uses: Noelware/docker-manifest-action@0.3.1
         with:
           inputs: falcosecurity/falco:latest
@@ -124,7 +130,7 @@ jobs:
           push: true
           
       - name: Create and push falco latest manifest for ecr
-        if: ${{ github.ref_name != 'master' }}
+        if: ${{ inputs.is_latest }}
         uses: Noelware/docker-manifest-action@0.3.1
         with:
           inputs: public.ecr.aws/falcosecurity/falco:latest
@@ -146,7 +152,7 @@ jobs:
           push: true    
       
       - name: Create and push falco-driver-loader latest manifest
-        if: ${{ github.ref_name != 'master' }}
+        if: ${{ inputs.is_latest }}
         uses: Noelware/docker-manifest-action@0.3.1
         with:
           inputs: falcosecurity/falco-driver-loader:latest
@@ -154,7 +160,7 @@ jobs:
           push: true
           
       - name: Create and push falco-driver-loader latest manifest for ecr
-        if: ${{ github.ref_name != 'master' }}
+        if: ${{ inputs.is_latest }}
         uses: Noelware/docker-manifest-action@0.3.1
         with:
           inputs: public.ecr.aws/falcosecurity/falco-driver-loader:latest