Consolidates setContext into commands

Adds context for toggling CodeLens

src/commands.ts

@@ -1,4 +1,7 @@
 'use strict';
+import { commands } from 'vscode';
+import { BuiltInCommands } from './constants';
+
 export { Keyboard } from './commands/keyboard';
 
 export { ActiveEditorCommand, Command, Commands, EditorCommand, openEditor } from './commands/commands';
@@ -20,4 +23,17 @@ export { ShowQuickFileHistoryCommand } from './commands/showQuickFileHistory';
 export { ShowQuickRepoHistoryCommand } from './commands/showQuickRepoHistory';
 export { ShowQuickRepoStatusCommand } from './commands/showQuickRepoStatus';
 export { ToggleBlameCommand } from './commands/toggleBlame';
-export { ToggleCodeLensCommand } from './commands/toggleCodeLens';
+export { ToggleCodeLensCommand } from './commands/toggleCodeLens';
+
+export type CommandContext = 'gitlens:canToggleCodeLens' | 'gitlens:enabled' | 'gitlens:isBlameable' | 'gitlens:key';
+export const CommandContext = {
+    CanToggleCodeLens: 'gitlens:canToggleCodeLens' as CommandContext,
+    Enabled: 'gitlens:enabled' as CommandContext,
+    IsBlameable: 'gitlens:isBlameable' as CommandContext,
+    Key: 'gitlens:key' as CommandContext
+};
+
+
+export function setCommandContext(key: CommandContext, value: any) {
+    return commands.executeCommand(BuiltInCommands.SetContext, key, value);
+}