docker-dind: add fetch_build_tag.sh

oci/base/alpine-docker-dind/Dockerfile

@@ -8,6 +8,7 @@ RUN apk update && \
 # Set environment variables for Docker daemon to listen on tcp and to disable TLS (adjust based on your security requirements)
 ENV DOCKER_TLS_CERTDIR=""
 ENV DOCKER_HOST=tcp://localhost:2375
+COPY fetch_build_tag.sh /opt/
 
 # Expose the default Docker daemon port
 EXPOSE 2375

oci/base/alpine-docker-dind/fetch_build_tag.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+# Configure git to allow all directories
+git config --global --add safe.directory '*'
+
+# Get the latest tag containing the HEAD
+TAG=$(git tag --contains HEAD | head -n 1)
+
+# Get the short commit ID
+SHORT_COMMIT_ID=$(echo $GITHUB_SHA | cut -c1-7)
+
+# Get the current branch name
+BRANCH_NAME=$(git branch --show-current)
+
+# Logic to set the build tag based on branch and tag status
+if [[ "$BRANCH_NAME" == "main" ]]; then
+    echo "BUILD_TAG=latest" >> $GITHUB_ENV
+elif [[ "$BRANCH_NAME" =~ ^release/ ]] && [[ -z "$TAG" ]]; then
+    PR_ID=$(git log | grep "Merge pull request" | head -n 1 | awk -F# '{print $2}' | awk '{print $1}')
+    echo "BUILD_TAG=PR-${PR_ID}-$SHORT_COMMIT_ID" >> $GITHUB_ENV
+elif [[ "$BRANCH_NAME" =~ ^release/ ]] && [[ ! -z "$TAG" ]]; then
+    echo "BUILD_TAG=$TAG" >> $GITHUB_ENV
+else
+    JIRA_TICKET=$(git branch | grep '^\*' | awk '{print $2}' | awk -F- '{print $1"-"$2}')
+    echo "BUILD_TAG=$JIRA_TICKET-$SHORT_COMMIT_ID" >> $GITHUB_ENV
+fi