Add .env to export environment variables (#1154)

Author: RobertLucian

Diff for: cli/cmd/deploy.go

@@ -149,6 +149,11 @@ func findProjectFiles(provider types.ProviderType, configPath string) ([]string,
 		return nil, err
 	}
 
+	dotEnvPath := path.Join(projectRoot, ".env")
+	if files.IsFile(dotEnvPath) {
+		projectPaths = append(projectPaths, dotEnvPath)
+	}
+
 	return projectPaths, nil
 }
 

Diff for: docs/deployments/predictors.md

@@ -14,9 +14,12 @@ The response type of the predictor can vary depending on your requirements, see
 
 ## Project files
 
-Cortex makes all files in the project directory (i.e. the directory which contains `cortex.yaml`) available for use in your Predictor implementation. Python bytecode files (`*.pyc`, `*.pyo`, `*.pyd`), files or folders that start with `.`, and the api configuration file (e.g. `cortex.yaml`) are excluded. You may also add a `.cortexignore` file at the root of the project directory, which follows the same syntax and behavior as a [.gitignore file](https://git-scm.com/docs/gitignore).
+Cortex makes all files in the project directory (i.e. the directory which contains `cortex.yaml`) available for use in your Predictor implementation. Python bytecode files (`*.pyc`, `*.pyo`, `*.pyd`), files or folders that start with `.`, and the api configuration file (e.g. `cortex.yaml`) are excluded.
 
-For example, if this is your project directory:
+The following files can also be added at the root of the project's directory:
+
+* `.cortexignore` file, which follows the same syntax and behavior as a [.gitignore file](https://git-scm.com/docs/gitignore).
+* `.env` file, which exports environment variables that can be used in the predictor. Each line of this file must follow the `VARIABLE=value` format.
 
 ```text
 ./iris-classifier/

Diff for: pkg/workloads/cortex/serve/run.sh

@@ -21,20 +21,29 @@ mkdir -p /mnt/requests
 
 cd /mnt/project
 
-# If the container restarted, ensure that it is not perceived as ready
+# if the container restarted, ensure that it is not perceived as ready
 rm -rf /mnt/workspace/api_readiness.txt
 
-# Allow for the liveness check to pass until the API is running
+# allow for the liveness check to pass until the API is running
 echo "9999999999" > /mnt/workspace/api_liveness.txt
 
 export PYTHONPATH=$PYTHONPATH:$PYTHON_PATH
+# ensure predictor print() statements are always flushed
+export PYTHONUNBUFFERED=TRUE
 
 if [ "$CORTEX_PROVIDER" != "local" ]; then
     sysctl -w net.core.somaxconn=$CORTEX_SO_MAX_CONN >/dev/null
     sysctl -w net.ipv4.ip_local_port_range="15000 64000" >/dev/null
     sysctl -w net.ipv4.tcp_fin_timeout=30 >/dev/null
 fi
 
+# export environment variables
+if [ -f "/mnt/project/.env" ]; then
+    set -a
+    source /mnt/project/.env
+    set +a
+fi
+
 # execute script if present in project's directory
 if [ -f "/mnt/project/dependencies.sh" ]; then
     bash -e /mnt/project/dependencies.sh
@@ -62,7 +71,5 @@ if [ -f "/mnt/project/requirements.txt" ]; then
     pip --no-cache-dir install -r /mnt/project/requirements.txt
 fi
 
-# Ensure predictor print() statements are always flushed
-export PYTHONUNBUFFERED=TRUE
-
+# run webserver
 /opt/conda/envs/env/bin/python /src/cortex/serve/start_uvicorn.py