Adds 'Show Stashed Changes` command

Adds experimental 'Apply Stashed Changes' command
Adds experimental 'Delete Stashed Changes' to stashed changes quick pick

src/commands/stashApply.ts

@@ -0,0 +1,48 @@
+'use strict';
+import { MessageItem, window } from 'vscode';
+import { GitService, GitStashCommit } from '../gitService';
+import { Command, Commands } from './common';
+import { CommitQuickPickItem, StashListQuickPick } from '../quickPicks';
+import { Logger } from '../logger';
+
+export class StashApplyCommand extends Command {
+
+    constructor(private git: GitService) {
+        super(Commands.StashApply);
+    }
+
+    async execute(stashItem: { stashName: string, message: string }, confirm: boolean = true, deleteAfter: boolean = false) {
+        if (!this.git.config.insiders) return undefined;
+
+        if (!stashItem || !stashItem.stashName) {
+            const stash = await this.git.getStashList(this.git.repoPath);
+            if (!stash) return window.showInformationMessage(`There are no stashed changes`);
+
+            const pick = await StashListQuickPick.show(stash, 'Apply stashed changes to your working tree\u2026');
+            if (!pick || !(pick instanceof CommitQuickPickItem)) return undefined;
+
+            stashItem = pick.commit as GitStashCommit;
+        }
+
+        try {
+            if (confirm) {
+                const message = stashItem.message.length > 80 ? `${stashItem.message.substring(0, 80)}\u2026` : stashItem.message;
+                const result = await window.showWarningMessage(`Apply stashed changes '${message}' to your working tree?`, { title: 'Yes, delete after applying' } as MessageItem, { title: 'Yes' } as MessageItem, { title: 'No', isCloseAffordance: true } as MessageItem);
+                if (!result || result.title === 'No') return undefined;
+
+                deleteAfter = result.title !== 'Yes';
+            }
+
+            return await this.git.stashApply(this.git.repoPath, stashItem.stashName, deleteAfter);
+        }
+        catch (ex) {
+            Logger.error(ex, 'StashApplyCommand');
+            if (ex.message.includes('Your local changes to the following files would be overwritten by merge')) {
+                return window.showErrorMessage(`Unable to apply stash. Your working tree changes would be overwritten.`);
+            }
+            else {
+                return window.showErrorMessage(`Unable to apply stash. See output channel for more details`);
+            }
+        }
+    }
+}