refactor: move Git code to gitExtension.ts

Author: MichaelCurrin

src/extension.ts

@@ -1,22 +1,13 @@
 /**
  * Extension module.
  *
- * This sets up the extension's command entry point and applies the
- * prepare commit message module to a target branch.
+ * This sets up the extension's command entry point and applies the prepare commit message module to
+ * a target branch.
  */
 import * as vscode from "vscode";
-import { API, GitExtension } from "./api/git";
+import { API } from "./api/git";
 import { makeAndFillCommitMsg } from "./autofill";
-
-/**
- * Return VS Code's builtin Git extension.
- */
-function getGitExtension() {
-  const vscodeGit = vscode.extensions.getExtension<GitExtension>("vscode.git");
-  const gitExtension = vscodeGit && vscodeGit.exports;
-
-  return gitExtension && gitExtension.getAPI(1);
-}
+import { getGitExtension } from "./gitExtension";
 
 /**
  * Flow for multiple repos in workspace and selecting just one. This is a rare flow.

src/gitExtension.ts

@@ -1,15 +1,16 @@
 /**
  * Git extension module.
  *
- * Perform tasks related to the builtin Git extension.
+ * Perform tasks related to the built-in Git extension.
  *
  * This module takes care of the high-level flow of the extension, after a repo is selected in
  * extension.ts module.
  *
  * This module handles reading git output, processes it with the logic in the generate module and
  * then finally sets it in the UI message box.
  */
-import { Repository } from "./api/git";
+import * as vscode from "vscode";
+import { GitExtension, Repository } from "./api/git";
 
 /**
  * Fetch the commit message in the Git Extension.
@@ -28,3 +29,13 @@ export function getCommitMsg(repository: Repository): string {
 export function setCommitMsg(repository: Repository, msg: string) {
   repository.inputBox.value = msg;
 }
+
+/**
+ * Return VS Code's built-in Git extension.
+ */
+export function getGitExtension() {
+  const vscodeGit = vscode.extensions.getExtension<GitExtension>("vscode.git");
+  const gitExtension = vscodeGit && vscodeGit.exports;
+
+  return gitExtension && gitExtension.getAPI(1);
+}