From 692728b77082708f21a5dd4d83685080272bf39e Mon Sep 17 00:00:00 2001
From: Yar Kravtsov <yarlson@gmail.com>
Date: Mon, 21 Oct 2024 08:47:18 +0300
Subject: [PATCH] feat: Implement environment variable expansion in
 configuration parsing

---
 README.md            | 6 +++---
 pkg/config/config.go | 4 +++-
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index 68e1d57..8c51c45 100644
--- a/README.md
+++ b/README.md
@@ -81,9 +81,9 @@ storages:
     image: postgres:16
       - postgres_data:/var/lib/postgresql/data
     env_vars:
-      - POSTGRES_PASSWORD=S3cret
-      - POSTGRES_USER=my-app
-      - POSTGRES_DB=my-app
+      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD}
+      - POSTGRES_USER=${POSTGRES_USER}
+      - POSTGRES_DB=${POSTGRES_DB}
 
 volumes:
   - postgres_data
diff --git a/pkg/config/config.go b/pkg/config/config.go
index 0dfb6d7..4490a39 100644
--- a/pkg/config/config.go
+++ b/pkg/config/config.go
@@ -77,8 +77,10 @@ type Volume struct {
 }
 
 func ParseConfig(data []byte) (*Config, error) {
+	expandedData := os.ExpandEnv(string(data))
+
 	var config Config
-	if err := yaml.Unmarshal(data, &config); err != nil {
+	if err := yaml.Unmarshal([]byte(expandedData), &config); err != nil {
 		return nil, fmt.Errorf("error parsing YAML: %v", err)
 	}