fix: error messages only when defaultImage is explicitly set

package.json

@@ -65,7 +65,7 @@
     "depcheck": "1.x.x",
     "esbuild": "^0.24.0",
     "eslint": "8.x.x",
-    "jest": "29.x.x",
+    "jest": "^29.x.x",
     "jest-when": "3.x.x",
     "nodemon": "^3.1.1",
     "ts-jest": "29.x.x",
@@ -187,4 +187,4 @@
     "src/**/*.js",
     "src/**/*.json"
   ]
-}
+}

src/argv.ts

@@ -49,11 +49,11 @@ export class Argv {
             writeStreams?.stderr(chalk`{black.bgYellowBright  WARN } --shell-isolation does not work with --no-shell-executor-no-image\n`);
         }
 
-        if (argv.defaultImage && argv.shellIsolation) {
+        if (argv.defaultImageExplicitlySet && argv.shellIsolation) {
             writeStreams?.stderr(chalk`{black.bgYellowBright  WARN } --default-image does not work with --shell-isolation=true\n`);
         }
 
-        if (argv.defaultImage && argv.shellExecutorNoImage) {
+        if (argv.defaultImageExplicitlySet && argv.shellExecutorNoImage) {
             writeStreams?.stderr(chalk`{black.bgYellowBright  WARN } --default-image does not work with --shell-executor-no-image=true\n`);
         }
 
@@ -286,6 +286,10 @@ export class Argv {
         return this.map.get("defaultImage") ?? "docker.io/ruby:3.1";
     }
 
+    get defaultImageExplicitlySet (): boolean {
+        return this.map.get("defaultImage") ?? false;
+    }
+
     get maximumIncludes (): number {
         return this.map.get("maximumIncludes") ?? 150; // https://docs.gitlab.com/ee/administration/settings/continuous_integration.html#maximum-includes
     }