Adds copyMessageToClipboard command

Adds copyMessageToClipboard to the editor content menu
Adds copyMessageToClipboard to showQuickCommitDetails quick pick

src/commands/copyMessageToClipboard.ts

@@ -0,0 +1,75 @@
+'use strict';
+import { Iterables } from '../system';
+import { TextEditor, Uri, window } from 'vscode';
+import { ActiveEditorCommand } from './commands';
+import { Commands } from '../constants';
+import GitProvider, { GitUri } from '../gitProvider';
+import { Logger } from '../logger';
+import { copy } from 'copy-paste';
+
+export default class CopyMessageToClipboardCommand extends ActiveEditorCommand {
+
+    constructor(private git: GitProvider, public repoPath: string) {
+        super(Commands.CopyMessageToClipboard);
+    }
+
+    async execute(editor: TextEditor, uri?: Uri, sha?: string, message?: string): Promise<any> {
+        if (!(uri instanceof Uri)) {
+            uri = editor && editor.document && editor.document.uri;
+        }
+
+        try {
+            // If we don't have an editor then get the message of the last commit to the repository
+            if (!uri) {
+                const log = await this.git.getLogForRepo(this.repoPath, undefined, 1);
+                if (!log) return undefined;
+
+                message = Iterables.first(log.commits.values()).message;
+                copy(message);
+                return undefined;
+            }
+
+            const line = editor.selection.active.line;
+            const gitUri = GitUri.fromUri(uri, this.git);
+
+            if (!message) {
+                if (!sha) {
+                    const blameline = line - gitUri.offset;
+                    if (blameline < 0) return undefined;
+
+                    try {
+                        const blame = await this.git.getBlameForLine(gitUri.fsPath, blameline, gitUri.sha, gitUri.repoPath);
+                        if (!blame) return undefined;
+
+                        if (blame.commit.isUncommitted) return undefined;
+
+                        sha = blame.commit.sha;
+                        if (!gitUri.repoPath) {
+                            gitUri.repoPath = blame.commit.repoPath;
+                        }
+                    }
+                    catch (ex) {
+                        Logger.error('[GitLens.CopyMessageToClipboardCommand]', `getBlameForLine(${blameline})`, ex);
+                        return window.showErrorMessage(`Unable to copy message. See output channel for more details`);
+                    }
+                }
+
+                // Get the full commit message -- since blame only returns the summary
+                const log = await this.git.getLogForFile(gitUri.fsPath, sha, gitUri.repoPath, undefined, 1);
+                if (!log) return undefined;
+
+                const commit = log.commits.get(sha);
+                if (!commit) return undefined;
+
+                message = commit.message;
+            }
+
+            copy(message);
+            return undefined;
+        }
+        catch (ex) {
+            Logger.error('GitLens.CopyMessageToClipboardCommand', ex);
+            return window.showErrorMessage(`Unable to copy message. See output channel for more details`);
+        }
+    }
+}