Task A-5: Added reusable workflow

Storing a reusable workflow in the e-mission-server repo. Can decide where to place it in a central location.
https://docs.github.com/en/actions/sharing-automations/reusing-workflows

It essentially works like a function call in normal programming.
The advantage is that we have no repeated code the image build process.
All the other repos (join, admin-dash, public-dash) reuse the same workflow file.

Additionally, on for future GitHub actions, workflow file related changes, will no longer need to have 3 additional PRs for each repo (join, admin-dash, public-dash). Can simply modify the reusable workflow file as this is the core “function” workflow that is being called.

I have added conditional checks that check for the repo name in the reusable workflow file that determine which statements to execute depending on for which repo the workflow is running.

This is used for both push events specific to a repo as well as for the workflow dispatch events triggered on pushes to server repo.

.github/workflows/reusable_image_build_push.yml

@@ -0,0 +1,141 @@
+name: Reusable Docker Image Build and Push
+
+on:
+  workflow_call:
+    inputs:
+      repo:
+        required: true
+        type: string
+      branch:
+        required: true
+        type: string
+
+env:
+  DOCKER_USER: ${{secrets.DOCKER_USER}}
+  DOCKER_PASSWORD: ${{secrets.DOCKER_PASSWORD}}
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          repository: e-mission/${{ inputs.repo }}
+          ref: ${{ inputs.branch }}
+          token: ${{ secrets.GH_FG_PAT_TAGS }}
+
+      - name: Fetch server image tag
+        id: get-server-tag
+        run: |
+          if [ "${{ inputs.repo }}" = "op-admin-dashboard" ] || [ "${{ inputs.repo }}" = "em-public-dashboard" ]; then
+            response=$(curl -s https://raw.githubusercontent.com/e-mission/e-mission-server/refs/heads/cleanup-cicd/.env)
+            SERVER_IMAGE_TAG=$(echo "$response" | grep "SERVER_IMAGE_TAG=" | cut -d'=' -f2)
+            echo "SERVER_IMAGE_TAG=$SERVER_IMAGE_TAG" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Set docker image tags
+        id: set-tags
+        run: |
+          ls -al
+          set -a; source .env; set +a
+          if [ "${{ inputs.repo }}" = "nrel-openpath-join-page" ]; then
+            echo "JOIN_IMAGE_TAG=${JOIN_IMAGE_TAG}" >> "$GITHUB_OUTPUT"
+          elif [ "${{ inputs.repo }}" = "op-admin-dashboard" ]; then
+            echo "ADMIN_DASH_IMAGE_TAG=${ADMIN_DASH_IMAGE_TAG}" >> "$GITHUB_OUTPUT"
+          elif [ "${{ inputs.repo }}" = "em-public-dashboard" ]; then
+            echo "PUBLIC_DASH_NOTEBOOK_IMAGE_TAG=${PUBLIC_DASH_NOTEBOOK_IMAGE_TAG}" >> "$GITHUB_OUTPUT"
+            echo "PUBLIC_DASH_FRONTEND_IMAGE_TAG=${PUBLIC_DASH_FRONTEND_IMAGE_TAG}" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Print input docker image tags
+        run: |
+          echo "Event name: ${{ github.event_name }}"
+          if [ "${{ inputs.repo }}" = "nrel-openpath-join-page" ]; then
+            echo "Current join-page image tag: ${{ steps.set-tags.outputs.JOIN_IMAGE_TAG }}"
+          elif [ "${{ inputs.repo }}" = "op-admin-dashboard" ]; then
+            echo "Current admin-dash image tag: ${{ steps.set-tags.outputs.ADMIN_DASH_IMAGE_TAG }}"
+            echo "Latest server image tag (${{ github.event_name }}): ${{ steps.get-server-tag.outputs.SERVER_IMAGE_TAG }}"
+          elif [ "${{ inputs.repo }}" = "em-public-dashboard" ]; then            
+            echo "Current notebook image tag (push): ${{ steps.set-tags.outputs.PUBLIC_DASH_NOTEBOOK_IMAGE_TAG }}"
+            echo "Current frontend image tag (push): ${{ steps.set-tags.outputs.PUBLIC_DASH_FRONTEND_IMAGE_TAG }}"
+            echo "Latest server image tag (${{ github.event_name }}): ${{ steps.get-server-tag.outputs.SERVER_IMAGE_TAG }}"
+          fi
+
+      - name: docker login
+        run: |
+          docker login -u $DOCKER_USER -p $DOCKER_PASSWORD
+
+      - name: Get current date # get the date of the build
+        id: date
+        run: echo "date=$(date +'%Y-%m-%d--%M-%S')" >> "$GITHUB_OUTPUT"
+
+      - name: Run a one-line script
+        run: echo running image build for repo ${{ inputs.repo }} branch ${{ inputs.branch }} on ${{ steps.date.outputs.date }}
+
+      - name: build docker image
+        run: |
+          if [ "${{ inputs.repo }}" = "nrel-openpath-join-page" ]; then
+            docker build -t $DOCKER_USER/${{ inputs.repo }}:${{ inputs.branch }}_${{ steps.date.outputs.date }} ./frontend
+          elif [ "${{ inputs.repo }}" = "op-admin-dashboard" ]; then
+            SERVER_IMAGE_TAG=${{ steps.get-server-tag.outputs.SERVER_IMAGE_TAG }} docker compose -f docker-compose-prod.yml build
+          elif [ "${{ inputs.repo }}" = "em-public-dashboard" ]; then            
+            SERVER_IMAGE_TAG=${{ steps.get-server-tag.outputs.SERVER_IMAGE_TAG }} docker compose -f docker-compose.yml build
+          fi
+          docker images
+
+      - name: rename docker image
+        run: |
+          if [ "${{ inputs.repo }}" = "op-admin-dashboard" ]; then
+            docker image tag e-mission/opdash:0.0.1 $DOCKER_USER/${{ inputs.repo }}:${{ inputs.branch }}_${{ steps.date.outputs.date }}
+          elif [ "${{ inputs.repo }}" = "em-public-dashboard" ]; then      
+            if [ "${{ github.event_name }}" == "push" ]; then
+              docker image tag em-pub-dash-prod/frontend:latest $DOCKER_USER/${{ inputs.repo }}_frontend:${{ inputs.branch }}_${{ steps.date.outputs.date }}
+            fi
+            docker image tag em-pub-dash-prod/viz-scripts:latest $DOCKER_USER/${{ inputs.repo }}_notebook:${{ inputs.branch }}_${{ steps.date.outputs.date }}
+          fi
+
+      - name: push docker image
+        run: |
+          if [ "${{ inputs.repo }}" = "op-admin-dashboard" ] || [ "${{ inputs.repo }}" = "nrel-openpath-join-page" ]; then
+            docker push $DOCKER_USER/${{ inputs.repo }}:${{ inputs.branch }}_${{ steps.date.outputs.date }}
+          elif [ "${{ inputs.repo }}" = "em-public-dashboard" ]; then      
+            if [ "${{ github.event_name }}" == "push" ]; then
+              docker push $DOCKER_USER/${{ inputs.repo }}_frontend:${{ inputs.branch }}_${{ steps.date.outputs.date }}
+            fi
+            docker push $DOCKER_USER/${{ inputs.repo }}_notebook:${{ inputs.branch }}_${{ steps.date.outputs.date }}
+          fi
+
+      - name: Update .env file 
+        run: |
+          if [ "${{ inputs.repo }}" = "nrel-openpath-join-page" ]; then
+            echo "JOIN_IMAGE_TAG=${{ inputs.branch }}_${{ steps.date.outputs.date }}" > .env
+          elif [ "${{ inputs.repo }}" = "op-admin-dashboard" ]; then
+            echo "ADMIN_DASH_IMAGE_TAG=${{ inputs.branch }}_${{ steps.date.outputs.date }}" > .env
+            echo "SERVER_IMAGE_TAG=${{ steps.get-server-tag.outputs.SERVER_IMAGE_TAG }}" >> .env
+          elif [ "${{ inputs.repo }}" = "em-public-dashboard" ]; then
+            echo "PUBLIC_DASH_NOTEBOOK_IMAGE_TAG=${{ inputs.branch }}_${{ steps.date.outputs.date }}" > .env
+            if [ "${{ github.event_name }}" == "push" ]; then
+              echo "Push event: Update frontend image tag"
+              echo "PUBLIC_DASH_FRONTEND_IMAGE_TAG=${{ inputs.branch }}_${{ steps.date.outputs.date }}" >> .env
+            else
+              echo "Workflow_dispatch: Reuse existing frontend image tag"
+              echo "PUBLIC_DASH_FRONTEND_IMAGE_TAG=${{ steps.set-tags.outputs.PUBLIC_DASH_FRONTEND_IMAGE_TAG }}" >> .env
+            fi
+            echo "SERVER_IMAGE_TAG=${{ steps.get-server-tag.outputs.SERVER_IMAGE_TAG }}" >> .env
+          fi
+          cat .env
+
+      - name: Add, Commit, Push changes to .env file
+        run: |
+          git config --local user.email "action@github.com"
+          git config --local user.name "Github Actions bot to update .env with latest tags"
+          # echo ${{ github.actor }}
+          if git diff --quiet; then
+            echo "Latest timestamp already present in .env file, no changes to commit"
+          else
+            git add .env
+            git commit -m "Updated docker image tags in .env file to the latest timestamp"
+            git push origin
+          fi
+          cat .env