improve robustness

action.yml

@@ -1,49 +1,86 @@
 name: 'Process Deployment File'
-description: 'Processes docker-stack.yml with environment variables'
+description: |
+  Processes a Docker Compose or Stack deployment file by substituting placeholders
+  with values from GitHub Action inputs, environment variables, and secrets.
+
 inputs:
+  compose_file:
+    description: 'The deployment file to process (e.g., docker-compose.yml, prod.compose.yml)'
+    required: true
   stack_name:
-    description: 'Stack name'
+    description: 'Stack name to substitute in deployment file'
     required: true
   org_name:
-    description: 'Organization name'
+    description: 'Organization name to substitute in deployment file'
     required: true
   repo_name:
-    description: 'Repository name'
+    description: 'Repository name to substitute in deployment file'
     required: true
   git_sha:
-    description: 'Git short SHA'
+    description: 'Git short SHA to substitute in deployment file'
     required: true
+
 outputs:
   processed_file:
-    description: 'Path to processed deployment file'
-    value: 'docker-stack.processed.yml'
+    description: 'Path to the processed deployment file'
+    value: ${{ steps.process.outputs.processed_file }}
+
 runs:
   using: 'composite'
   steps:
-    - shell: bash
+    - id: process
+      shell: bash
       run: |
-        echo "Starting processing of docker-stack.yml"
-        cp docker-stack.yml docker-stack.processed.yml
+        set -euo pipefail
 
-        if [ -f ".env" ]; then
-          echo ".env file found, processing variables..."
-          while IFS= read -r line || [[ -n "$line" ]]; do
-            if [[ $line =~ ^[^#]+=.+ ]]; then
-              VAR_NAME=$(echo "$line" | cut -d= -f1)
-              VAR_VALUE=$(echo "$line" | cut -d= -f2-)
-              echo "Replacing variable from .env: $VAR_NAME=$VAR_VALUE"
-              sed -i "s|\${$VAR_NAME}|$VAR_VALUE|g" docker-stack.processed.yml
+        INPUT_FILE="${{ inputs.compose_file }}"
+        OUTPUT_FILE="${INPUT_FILE%.*}.processed.${INPUT_FILE##*.}"
+
+        echo "DEBUG: Processing deployment file: $INPUT_FILE"
+        if [ ! -f "$INPUT_FILE" ]; then
+          echo "ERROR: Input file '$INPUT_FILE' does not exist."
+          exit 1
         fi
+
+        cp "$INPUT_FILE" "$OUTPUT_FILE"
+
+        # Substitute variables from .env file if it exists
+        if [ -f ".env" ]; then
+          echo "DEBUG: Found .env file. Substituting variables from .env."
+          while IFS='=' read -r VAR_NAME VAR_VALUE || [ -n "$VAR_NAME" ]; do
+            [[ "$VAR_NAME" =~ ^#.*$ || -z "$VAR_NAME" ]] && continue
+            VAR_VALUE=${VAR_VALUE//\"/}
+            echo "DEBUG: Replacing \${$VAR_NAME} with value from .env"
+            sed -i "s|\${$VAR_NAME}|$VAR_VALUE|g" "$OUTPUT_FILE"
           done < .env
         else
-          echo "No .env file found, skipping environment variable replacement."
+          echo "DEBUG: No .env file found. Skipping .env substitutions."
         fi
 
-        echo "Replacing GitHub Actions input variables..."
-        sed -i "s|\${STACK_NAME}|${{ inputs.stack_name }}|g" docker-stack.processed.yml
-        sed -i "s|\${REPO_ORG}|${{ inputs.org_name }}|g" docker-stack.processed.yml
-        sed -i "s|\${REPO_NAME}|${{ inputs.repo_name }}|g" docker-stack.processed.yml
-        sed -i "s|\${GIT_SHA}|${{ inputs.git_sha }}|g" docker-stack.processed.yml
+        # Substitute GitHub Actions inputs
+        declare -A substitutions=(
+          ["STACK_NAME"]="${{ inputs.stack_name }}"
+          ["REPO_ORG"]="${{ inputs.org_name }}"
+          ["REPO_NAME"]="${{ inputs.repo_name }}"
+          ["GIT_SHA"]="${{ inputs.git_sha }}"
+        )
 
-        echo "Processed file content:"
-        cat docker-stack.processed.yml
+        for VAR in "${!substitutions[@]}"; do
+          VALUE="${substitutions[$VAR]}"
+          echo "DEBUG: Replacing \${$VAR} with GitHub Action input value '$VALUE'"
+          sed -i "s|\${$VAR}|$VALUE|g" "$OUTPUT_FILE"
+        done
+
+        # Substitute environment variables and secrets available in GitHub Actions environment
+        echo "DEBUG: Substituting environment variables and secrets from GitHub Actions environment."
+        env | while IFS='=' read -r ENV_VAR ENV_VAL; do
+          if grep -q "\${$ENV_VAR}" "$OUTPUT_FILE"; then
+            echo "DEBUG: Replacing \${$ENV_VAR} with environment variable value."
+            sed -i "s|\${$ENV_VAR}|$ENV_VAL|g" "$OUTPUT_FILE"
+          fi
+        done
+
+        echo "DEBUG: Final processed deployment file content:"
+        cat "$OUTPUT_FILE"
+
+        echo "processed_file=$OUTPUT_FILE" >> $GITHUB_OUTPUT