Enable .env file support

src/pkg/cli/compose_test.go

@@ -334,7 +334,7 @@ func TestCreateTarballReader(t *testing.T) {
 		}
 		defer g.Close()
 
-		expected := []string{".dockerignore", "Dockerfile", "fileName.env"}
+		expected := []string{".dockerignore", ".env", "Dockerfile", "fileName.env"}
 		var actual []string
 		ar := tar.NewReader(g)
 		for {

src/pkg/cli/loader.go

@@ -89,15 +89,19 @@ func getDefaultProjectOptions(workingDir string, extraOpts ...cli.ProjectOptions
 		// First apply os.Environment, always win
 		// -- DISABLED -- cli.WithOsEnv,
 		// Load PWD/.env if present and no explicit --env-file has been set
-		// -- NO SUCH PARAM YET -- cli.WithEnvFiles(o.EnvFiles...), TODO: Do we support env files?
+		cli.WithEnvFiles(), // TODO: Support --env-file to be added as param to this call
 		// read dot env file to populate project environment
-		// -- DISABLED -- cli.WithDotEnv,
+		cli.WithDotEnv,
 		// get compose file path set by COMPOSE_FILE
 		cli.WithConfigFileEnv,
 		// if none was selected, get default compose.yaml file from current dir or parent folder
 		cli.WithDefaultConfigPath,
 		// cli.WithName(o.ProjectName)
 
+		// .. and then, a project directory != PWD maybe has been set so let's load .env file
+		cli.WithEnvFiles(), // TODO: Support --env-file to be added as param to this call
+		cli.WithDotEnv,
+
 		// DEFANG SPECIFIC OPTIONS
 		cli.WithDefaultProfiles("defang"),
 		cli.WithDiscardEnvFile,

src/tests/testproj/.env

@@ -0,0 +1 @@
+DOTENV=enabled

src/tests/testproj/compose.yaml

@@ -27,6 +27,9 @@ services:
       - dummy
     healthcheck:
       test: ["CMD", "curl", "-f", "http://localhost/"]
+    environment:
+      - DOTENV
+      - DOT_ENV_INTERPOLATION=${DOTENV}
       # disable: true
 
   # dfnx:

src/tests/testproj/compose.yaml.golden

@@ -16,6 +16,8 @@ services:
           cpus: 0.25
           memory: "268435456"
     environment:
+      DOT_ENV_INTERPOLATION: enabled
+      DOTENV: enabled
       FOO: bar
     healthcheck:
       test: