tweak error handling

package.json

@@ -49,7 +49,7 @@
     "typescript"
   ],
   "dependencies": {
-    "@ryanatkn/belt": "^0.24.9",
+    "@ryanatkn/belt": "^0.24.10",
     "chokidar": "^3.6.0",
     "dotenv": "^16.4.5",
     "es-module-lexer": "^1.5.4",
@@ -69,7 +69,7 @@
     "@changesets/changelog-git": "^0.2.0",
     "@changesets/types": "^6.0.0",
     "@ryanatkn/eslint-config": "^0.4.2",
-    "@ryanatkn/fuz": "^0.115.0",
+    "@ryanatkn/fuz": "^0.115.1",
     "@ryanatkn/moss": "^0.8.0",
     "@sveltejs/adapter-static": "^3.0.2",
     "@sveltejs/kit": "^2.5.18",

src/lib/invoke.ts

@@ -17,8 +17,9 @@ and the rest of the args are forwarded to the task's `run` function.
 */
 
 // handle uncaught errors
-attach_process_error_handlers((err) =>
-	err?.constructor?.name === 'Task_Error' ? 'Task_Error' : null,
+attach_process_error_handlers(
+	(err) => (err.constructor.name === 'Task_Error' ? 'Task_Error' : null),
+	(err) => (err.constructor.name === 'Silent_Error' ? '' : null),
 );
 
 await sveltekit_sync_if_obviously_needed();

src/lib/invoke_task.ts

@@ -6,7 +6,7 @@ import {print_ms, print_timings} from '@ryanatkn/belt/print.js';
 import {to_forwarded_args, type Args} from './args.js';
 import {run_task} from './run_task.js';
 import {to_input_path, Raw_Input_Path} from './input_path.js';
-import {find_tasks, load_tasks} from './task.js';
+import {find_tasks, load_tasks, Silent_Error} from './task.js';
 import {load_gro_package_json} from './package_json.js';
 import {log_tasks, log_error_reasons} from './task_logging.js';
 import type {Gro_Config} from './gro_config.js';
@@ -69,7 +69,7 @@ export const invoke_task = async (
 	const found = find_tasks([input_path], task_root_dirs, config);
 	if (!found.ok) {
 		log_error_reasons(log, found.reasons);
-		process.exit(1);
+		throw new Silent_Error();
 	}
 
 	// Found a match either in the current working directory or Gro's directory.
@@ -80,7 +80,7 @@ export const invoke_task = async (
 	const loaded = await load_tasks(found_tasks);
 	if (!loaded.ok) {
 		log_error_reasons(log, loaded.reasons);
-		process.exit(1);
+		throw new Silent_Error();
 	}
 	const loaded_tasks = loaded.value;
 

src/lib/package.ts

@@ -44,7 +44,7 @@ export const package_json = {
 		'typescript',
 	],
 	dependencies: {
-		'@ryanatkn/belt': '^0.24.9',
+		'@ryanatkn/belt': '^0.24.10',
 		chokidar: '^3.6.0',
 		dotenv: '^16.4.5',
 		'es-module-lexer': '^1.5.4',
@@ -61,7 +61,7 @@ export const package_json = {
 		'@changesets/changelog-git': '^0.2.0',
 		'@changesets/types': '^6.0.0',
 		'@ryanatkn/eslint-config': '^0.4.2',
-		'@ryanatkn/fuz': '^0.115.0',
+		'@ryanatkn/fuz': '^0.115.1',
 		'@ryanatkn/moss': '^0.8.0',
 		'@sveltejs/adapter-static': '^3.0.2',
 		'@sveltejs/kit': '^2.5.18',
@@ -964,6 +964,7 @@ export const src_json = {
 				{name: 'is_task_path', kind: 'function'},
 				{name: 'to_task_name', kind: 'function'},
 				{name: 'Task_Error', kind: 'class'},
+				{name: 'Silent_Error', kind: 'class'},
 				{name: 'Found_Task', kind: 'type'},
 				{name: 'Found_Tasks', kind: 'type'},
 				{name: 'Find_Tasks_Result', kind: 'type'},

src/lib/task.ts

@@ -80,6 +80,12 @@ export const to_task_name = (
  */
 export class Task_Error extends Error {}
 
+/**
+ * This is used to tell Gro to exit silently, usually still with with a non-zero exit code.
+ * Using it means error logging is handled by the code that threw it.
+ */
+export class Silent_Error extends Error {}
+
 export interface Found_Task {
 	input_path: Input_Path;
 	id: Path_Id;