feat(tasks): adds catches transform

package.json

@@ -80,6 +80,7 @@
   },
   "dependencies": {
     "chalk": "^2.4.2",
+    "errorish": "^0.4.0",
     "execa": "^3.4.0",
     "objectpath": "^2.0.0",
     "pipettes": "^0.1.3",

src/tasks/transform/catches.ts

@@ -0,0 +1,28 @@
+import { Task, Context, LogLevel } from '../../definitions';
+import { log } from '../create/log';
+import { into } from 'pipettes';
+import { ensure } from 'errorish';
+
+export interface CatchesOptions {
+  level?: LogLevel;
+}
+
+export function catches(
+  task: Task,
+  alternate?: Task | null,
+  options?: CatchesOptions
+): Task.Async {
+  return async (ctx: Context): Promise<void> => {
+    const opts = Object.assign({ level: 'warn' }, options);
+    try {
+      await task(ctx);
+    } catch (err) {
+      if (opts.level !== 'silent') {
+        into(ctx, log(opts.level, ensure(err).message));
+      }
+      if (alternate) {
+        await alternate(ctx);
+      }
+    }
+  };
+}

src/tasks/transform/index.ts

@@ -1,3 +1,4 @@
+export * from './catches';
 export * from './context';
 export * from './parallel';
 export * from './select';