Require a .env file for go.sh runtime.

Now that Docker Compose can parse Bash compatible env files, we can share a common file between Docker and `go.sh` runtimes. This replaces `.env.local`, and behaves more consistently to production Docker runtimes where env vars may be set on the container, before `entrypoint.sh` runs.

project_template/.env.example

@@ -0,0 +1,10 @@
+# These variables are sourced by 'go.sh', used in 'docker-compose.yml', and passed
+# through to the 'django' service via 'env_file'.
+
+export COMPOSE_PROJECT_NAME='project_template-develop'
+export DOTENV='develop'
+export IMAGE_TAG='master'
+export TRANSCRYPT_PASSWORD=''  # Get from 1Password
+
+# export SRC_PGDATABASE='initial_data.sql'
+# export WITHOUT_COVERAGE=1

project_template/docker-compose.yml

@@ -8,6 +8,7 @@ services:
       # - elasticsearch
       - postgres
       - redis
+    env_file: .env
     environment:
       DOTENV: ${DOTENV:-develop}
       # ELASTICSEARCH_ADDRESS: elasticsearch:9200

project_template/go.sh

@@ -45,11 +45,19 @@ if [[ "$CUR_PYTHON_VERSION" != "Python $REQ_PYTHON_VERSION" ]]; then
 	>&2 echo "ERROR: Missing Python version: $REQ_PYTHON_VERSION"
 fi
 
+if [[ ! -f .env ]]; then
+	MISSING=1
+	>&2 echo "ERROR: Missing '.env' file. Copy '.env.example' and update."
+fi
+
 # Abort if any dependencies are missing.
 if [[ -n "${MISSING+1}" ]]; then
 	exit 1
 fi
 
+# Configure environment.
+source .env
+
 # Get absolute project directory from the location of this script.
 # See: http://stackoverflow.com/a/4774063
 export PROJECT_DIR=$(cd $(dirname "${BASH_SOURCE[0]}"); pwd -P)