fix: load .env during images build (#123)

Author: rogercoll

.github/workflows/component_build-images-elastic.yml

@@ -113,6 +113,17 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
+      - name: Load environment variables from .env file
+        run: |
+          if [ -f .env ]; then
+            # Filter out comments and empty lines, then add each variable to $GITHUB_ENV
+            grep -vE '^\s*#|^\s*$' .env | while read -r line; do
+              echo "$line" >> $GITHUB_ENV
+            done
+          else
+            echo ".env file not found!"
+            exit 1
+          fi
       - name: Check for changes and set push options
         id: check_changes
         run: |
@@ -155,6 +166,10 @@ jobs:
           file: ${{ matrix.file_tag.file }}
           platforms: linux/amd64,linux/arm64
           push: ${{ inputs.push }}
+          build-args: |
+            OTEL_JAVA_AGENT_VERSION=${{ env.OTEL_JAVA_AGENT_VERSION }}
+            OPENTELEMETRY_CPP_VERSION=${{ env.OPENTELEMETRY_CPP_VERSION }}
+            TRACETEST_IMAGE_VERSION=${{ env.TRACETEST_IMAGE_VERSION }}
           tags: |
             ${{ env.GHCR_REPO }}:${{ inputs.version }}-${{ matrix.file_tag.tag_suffix }}
             ${{ env.GHCR_REPO }}:latest-${{ matrix.file_tag.tag_suffix }}