Support copy name of active file

src/controller/CopyFileNameController.ts

@@ -1,11 +1,18 @@
 import { copy } from 'copy-paste';
 import * as path from 'path';
 import { promisify } from 'util';
+import { window } from 'vscode';
 import { BaseCopyController } from './BaseCopyController';
 
 const copyAsync = promisify(copy);
 
+const GENERIC_ERROR_MESSAGE = 'Could not perform copy file name to clipboard';
+
 export class CopyFileNameController extends BaseCopyController {
+    // Possible errors and their suggested solutions
+    private readonly possibleErrorsMap: { [errorMessage: string]: string} = {
+        'spawn xclip ENOENT': 'Please install xclip package (`apt-get install xclip`)'
+    };
 
     public async execute(): Promise<void> {
         const sourcePath = this.sourcePath;
@@ -14,6 +21,18 @@ export class CopyFileNameController extends BaseCopyController {
         }
 
         const fileName = path.basename(sourcePath);
-        return copyAsync(fileName);
+        return copyAsync(fileName)
+        .catch((error: Error) => {
+            this.handleError(error.message);
+        });
+    }
+
+    private handleError(errorMessage: string): void {
+        // Can happen on unsupported platforms (e.g Linux machine without the xclip package installed).
+        // Attempting to provide a solution according to the error received
+        const errorSolution = this.possibleErrorsMap[errorMessage];
+        const warningMessageSuffix = errorSolution || errorMessage;
+
+        window.showWarningMessage(`${GENERIC_ERROR_MESSAGE}: ${warningMessageSuffix}`);
     }
 }

test/command/CopyFileName.test.ts

@@ -30,8 +30,15 @@ describe('CopyFileNameCommand', () => {
             it('check file name was copied to clipboard', () => {
                 return sut.execute()
                 .then(() => {
-                    const clipboardData = clipboardPaste();
-                    expect(clipboardData).to.equal(fixtureFile1Name);
+                    clipboardPaste((err, pasteContent) => {
+                        if (err) {
+                            // paste is not supported on this platform, probably due to a
+                            // missing xclip package.
+                            return;
+                        }
+
+                        expect(pasteContent).to.equal(fixtureFile1Name);
+                    });
                 });
             });
         });