Implement support for env_file parameter

Author: ericof

README.md

@@ -36,6 +36,7 @@ GitHub Action and Docker image used to deploy a Docker stack on a Docker Swarm.
 | `stack_file` | `STACK_FILE` | Path to the stack file used in the deploy. | ✅ | |
 | `stack_name` | `STACK_NAME` | Name of the stack to be deployed. | ✅ | |
 | `stack_param` | `STACK_PARAM` | Additional parameter (env var) to be passed to the stack. | | |
+| `env_file` | `ENV_FILE` | Additional environment variables to be passed to the stack. | | |
 | `debug` | `DEBUG` | Verbose logging | | **0** |
 
 

action.yml

@@ -45,6 +45,10 @@ inputs:
     description: "Additional stack parameter value"
     required: false
     default: ""
+  env_file:
+    description: "Additional environment variables in the format VAR_01=VALUE\nVAR_02=VALUE"
+    required: false
+    default: ""
   debug:
     description: "Debug information"
     required: false
@@ -64,4 +68,5 @@ runs:
     STACK_FILE: ${{ inputs.stack_file }}
     STACK_NAME: ${{ inputs.stack_name }}
     STACK_PARAM: ${{ inputs.stack_param }}
+    ENV_FILE: ${{ inputs.env_file }}
     DEBUG: ${{ inputs.debug }}

scripts/docker-entrypoint.sh

@@ -5,6 +5,7 @@ set -e
 SSH_DIR="/root/.ssh"
 SSH_KEY="${SSH_DIR}/docker"
 KNOWN_HOSTS="${SSH_DIR}/known_hosts"
+ENV_FILE_PATH="/root/.env"
 
 login() {
   echo "${PASSWORD}" | docker login "${REGISTRY}" -u "${USERNAME}" --password-stdin
@@ -27,6 +28,26 @@ configure_ssh_key() {
   ssh-add "${SSH_KEY}"
 }
 
+configure_env_file() {
+  echo "Environment Variables: Additional values"
+  printf '%s' "$ENV_FILE" > "${ENV_FILE_PATH}"
+  env_file_len=$(grep -v '^#' ${ENV_FILE_PATH}|grep -v '^$' -c)
+  if [[ $env_file_len -gt 0 ]]; then
+    if [ "${DEBUG}" != "0" ]; then
+      echo "Environment vars before: $(env|wc -l)"
+    fi
+    # shellcheck disable=SC2046
+    export $(grep -v '^#' ${ENV_FILE_PATH} | grep -v '^$' | xargs -d '\n')
+    if [ "${DEBUG}" != "0" ]; then
+      echo "Environment vars after: $(env|wc -l)"
+    fi
+  fi
+
+  chmod 600 "${ENV_FILE_PATH}"
+  eval "$(ssh-agent)"
+  ssh-add "${SSH_KEY}"
+}
+
 configure_ssh_host() {
   ssh-keyscan -p "${REMOTE_PORT}" "${REMOTE_HOST}" > "${KNOWN_HOSTS}"
   chmod 600 "${KNOWN_HOSTS}"
@@ -54,6 +75,14 @@ check_deploy() {
 
 [ -z ${DEBUG+x} ] && export DEBUG="0"
 
+# ADDITIONAL ENV VARIABLES
+if [[ -z "${ENV_FILE}" ]]; then
+  export ENV_FILE=""
+else
+  configure_env_file;
+fi
+
+# SET DEBUG
 if [ "${DEBUG}" != "0" ]; then
   OUT=/dev/stdout;
   SSH_VERBOSE="-vvv"
@@ -112,6 +141,8 @@ if [[ -z "${STACK_NAME}" ]]; then
   exit 1
 fi
 
+
+# CONFIGURE SSH CLIENT
 if configure_ssh > $OUT 2>&1; then
   echo "SSH client: Configured"
 else