feat(systemd): support configurable service environment variables

ts/smartdaemon.classes.service.ts

@@ -10,6 +10,7 @@ export interface ISmartDaemonServiceConstructorOptions {
   version: string;
   user?: string;
   group?: string;
+  environment?: Record<string, string>;
 }
 
 /**
@@ -36,6 +37,7 @@ export class SmartDaemonService implements ISmartDaemonServiceConstructorOptions
   public description!: string;
   public user?: string;
   public group?: string;
+  public environment?: Record<string, string>;
 
   public smartdaemonRef: SmartDaemon;
 

ts/smartdaemon.classes.templatemanager.ts

@@ -8,7 +8,21 @@ export class SmartDaemonTemplateManager {
     this.smartdaemonRef = smartdaemonRefArg;
   }
 
+  private generateEnvironmentLines(serviceArg: SmartDaemonService): string {
+    const environment = serviceArg.environment || {};
+    return Object.entries(environment)
+      .map(([key, value]) => {
+        if (!/^[A-Za-z_][A-Za-z0-9_]*$/.test(key)) {
+          throw new Error(`Invalid systemd environment key: ${key}`);
+        }
+        const escapedValue = value.replace(/\\/g, '\\\\').replace(/"/g, '\\"');
+        return `Environment="${key}=${escapedValue}"`;
+      })
+      .join('\n');
+  }
+
   public generateUnitFileForService = (serviceArg: SmartDaemonService) => {
+    const environmentLines = this.generateEnvironmentLines(serviceArg);
     return `# ---
 # name: ${serviceArg.name}
 # version: ${serviceArg.version}
@@ -26,8 +40,8 @@ After=network.target
 [Service]
 Type=simple${serviceArg.user ? `
 User=${serviceArg.user}` : ''}${serviceArg.group ? `
-Group=${serviceArg.group}` : ''}
-Environment=NODE_OPTIONS="--max_old_space_size=100"
+Group=${serviceArg.group}` : ''}${environmentLines ? `
+${environmentLines}` : ''}
 ExecStart=/bin/bash -c "cd ${serviceArg.workingDir} && ${serviceArg.command}"
 WorkingDirectory=${serviceArg.workingDir}
 Restart=on-failure