Docker tags update - 1

Wrote a Python script to replace the tags in the Dockerfiles. The script accepts two command-line arguments - file path where replacement to be made and the latest image tag.

Added a job in the YAML file to run this python script to replace the tags in the Dockerfiles.
Additionally, it also contains steps to automatically add, commit, push changes to the files in the repo.

.github/replaceTags.py

@@ -0,0 +1,53 @@
+import re
+import argparse
+
+def generateUpdatedSuffix(current_image_name):
+    try:
+        pattern = "^(FROM\s+)(.+)(/)(.+)(:)(.+)(_)(\d{4}-\d{2}-\d{2}--\d{2}-\d{2})"
+        matches = re.search(pattern, current_image_name)
+
+        current_timestamp = matches.group(8)
+        print("Current timestamp = %s" % current_timestamp)
+
+        latest_timestamp = args.tag
+        print("Latest timestamp = %s" % latest_timestamp)
+
+        latest_image_name = ''.join([match for match in matches.groups()[:-1]]) + latest_timestamp + "\n"
+        print("Current image name = %s" % current_image_name)
+        print("Latest image name = %s" % latest_image_name)
+        return latest_image_name
+    except:
+        print("No matching pattern found in FROM layer while parsing Dockerfile to replace tags.")
+        return False
+
+def updateDockerfile():
+    docker_file_path = rf"{args.file}"
+    docker_file = open(docker_file_path,"r")
+    current_file_content = docker_file.readlines()
+    docker_file.close()
+    updated_file_content = []
+
+    for line in current_file_content:
+        if line.strip().startswith("FROM ") and not line.strip().startswith("#"):
+            updatedTag = generateUpdatedSuffix(line)
+            if updatedTag is False:
+                updated_file_content.append(line)
+            else:
+                updated_file_content.append(updatedTag)
+        else:
+            updated_file_content.append(line)
+
+    with open(docker_file_path,"w") as docker_file:
+        docker_file.writelines(updated_file_content)
+
+    docker_file = open(docker_file_path,"r")
+    current_file_content = docker_file.readlines()
+    docker_file.close()
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser()
+    parser.add_argument("-f", "--file", help="Dockerfile path", required=True)
+    parser.add_argument("-t", "--tag", help="Latest docker image tag", required=True)
+    args = parser.parse_args()
+    print(args)
+    updateDockerfile()

.github/workflows/image_build_push.yml

@@ -23,9 +23,48 @@ on:
 env:
   DOCKER_USER: ${{secrets.DOCKER_USER}}
   DOCKER_PASSWORD: ${{secrets.DOCKER_PASSWORD}}
+  DOCKER_IMAGE_TAG: ${{ github.event.inputs.docker_image_tag }}
+
 
 # A workflow run is made up of one or more jobs that can run sequentially or in parallel
 jobs:
+
+  fetch_tag:
+    if: ${{ github.event_name == "workflow_dispatch" }}
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Print input docker image tag
+      run: |
+        echo "Input latest docker image tag: ${{ env.DOCKER_IMAGE_TAG }}"
+
+    - name: Set up Python
+      uses: actions/setup-python@v2
+      with: 
+        python-version: '3.x'
+
+    - name: Install Python dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install argparse
+
+    - name: Run Python script
+      id: run_script
+      run: |
+        echo "Running script to replace docker image tags in Dockerfiles"
+        python .github/replaceTags.py --file=docker/Dockerfile
+        python .github/replaceTags.py --file=Dockerfile
+
+    - name: Add, Commit, Push changes
+      run: |
+        git config --local user.email "action@github.com"
+        git config --local user.name "GitHub Action"
+        git add docker/Dockerfile Dockerfile
+        git commit -m "Updated docker image tags in Dockerfiles to the latest timestamp: ${{ env.DOCKER_IMAGE_TAG }}"
+        git push origin 
+
   # This workflow contains a single job called "build"
   build:
     # The type of runner that the job will run on
@@ -57,6 +96,3 @@ jobs:
     #   run: |
     #     docker push $DOCKER_USER/${GITHUB_REPOSITORY#*/}:${GITHUB_REF##*/}_${{ steps.date.outputs.date }}
 
-    - name: Print input docker image tag
-      run: |
-        echo "Input latest docker image tag: ${{ github.event.inputs.docker_image_tag }}"