Merge pull request #2396 from alexevladgabriel/feat/self-env-refs

feat: Self reference env variables

apps/dokploy/__test__/env/shared.test.ts

@@ -177,3 +177,77 @@ COMPLEX_VAR="'Prefix \"DoubleQuoted\" and \${{project.APP_NAME}}'"
 		]);
 	});
 });
+
+describe("prepareEnvironmentVariables (self references)", () => {
+	it("resolves self references correctly", () => {
+		const serviceEnv = `
+ENVIRONMENT=staging
+DATABASE_URL=postgres://postgres:postgres@localhost:5432/project_db
+SELF_REF=\${{ENVIRONMENT}}
+`;
+
+		const resolved = prepareEnvironmentVariables(serviceEnv, "");
+
+		expect(resolved).toEqual([
+			"ENVIRONMENT=staging",
+			"DATABASE_URL=postgres://postgres:postgres@localhost:5432/project_db",
+			"SELF_REF=staging",
+		]);
+	});
+
+	it("throws on undefined self references", () => {
+		const serviceEnv = `
+MISSING_VAR=\${{UNDEFINED_VAR}}
+`;
+
+		expect(() => prepareEnvironmentVariables(serviceEnv, "")).toThrow(
+			"Invalid service environment variable: UNDEFINED_VAR",
+		);
+	});
+
+	it("allows overriding and still resolving from self", () => {
+		const serviceEnv = `
+ENVIRONMENT=production
+OVERRIDE_ENV=\${{ENVIRONMENT}}
+`;
+
+		const resolved = prepareEnvironmentVariables(serviceEnv, "");
+
+		expect(resolved).toEqual([
+			"ENVIRONMENT=production",
+			"OVERRIDE_ENV=production",
+		]);
+	});
+
+	it("resolves multiple self references inside one value", () => {
+		const serviceEnv = `
+ENVIRONMENT=staging
+APP_NAME=MyApp
+COMPLEX=\${{APP_NAME}}-\${{ENVIRONMENT}}-\${{APP_NAME}}
+`;
+
+		const resolved = prepareEnvironmentVariables(serviceEnv, "");
+
+		expect(resolved).toEqual([
+			"ENVIRONMENT=staging",
+			"APP_NAME=MyApp",
+			"COMPLEX=MyApp-staging-MyApp",
+		]);
+	});
+
+	it("handles quotes with self references", () => {
+		const serviceEnv = `
+ENVIRONMENT=production
+QUOTED="'\${{ENVIRONMENT}}'"
+MIXED="\"Double \${{ENVIRONMENT}}\""
+`;
+
+		const resolved = prepareEnvironmentVariables(serviceEnv, "");
+
+		expect(resolved).toEqual([
+			"ENVIRONMENT=production",
+			"QUOTED='production'",
+			'MIXED="Double production"',
+		]);
+	});
+});

packages/server/src/utils/docker/utils.ts

@@ -273,6 +273,14 @@ export const prepareEnvironmentVariables = (
 				throw new Error(`Invalid project environment variable: project.${ref}`);
 			});
 		}
+
+		resolvedValue = resolvedValue.replace(/\$\{\{(.*?)\}\}/g, (_, ref) => {
+			if (serviceVars[ref] !== undefined) {
+				return serviceVars[ref];
+			}
+			throw new Error(`Invalid service environment variable: ${ref}`);
+		});
+
 		return `${key}=${resolvedValue}`;
 	});