refactor(diff): use VSCode Git extension

This takes a different approach to resolving
#94

Use the Git integration for Visual Studio Code (an extension that is
bundled with VSCode and neither be disabled or uninstalled, thus can be
effectively considered part of VSCode) to read files directly off of
Git.

Signed-off-by: Lorenz Leutgeb <[email protected]>

.eslintrc.js

@@ -25,6 +25,10 @@ module.exports = {
     '!.*rc.*',
     '!*.config.js',
     '!*.d.ts',
+
+    // Ignore, since this file is vendored from VSCode and should not be changed.
+    // See `CONTRIBUTING.md`.
+    'src/types/git.ts',
   ],
   rules: {
     /*

CONTRIBUTING.md

@@ -89,3 +89,16 @@ If necessary, specific code shared between extension and webviews should be extr
 ### Getting user input
 
 Use custom wrapper `askUser()` instead of the native [InputBox API](https://code.visualstudio.com/api/references/vscode-api#InputBox) which would result in procedural, verbose and brittle client code.
+
+## Vendored Dependencies
+
+Types for the [Git integration for VSCode](https://github.com/microsoft/vscode/tree/main/extensions/git) are vendored at [`src/types/git.ts`](src/types/git.ts).
+
+To update those, proceed as follows:
+
+```sh
+$ export VSCODE_TAG="1.88.1" # Adjust this to match desired version of VSCode.
+$ git remote add vscode "https://github.com/microsoft/vscode.git"
+$ git fetch --depth 1 vscode "$VSCODE_TAG"
+$ git show $(git ls-remote --refs --tags vscode "$VSCODE_TAG" | cut -d$'\t' -f1):extensions/git/src/api/git.ts > src/types/git.ts
+```

package.json

@@ -506,6 +506,9 @@
     "ts-xor": "^1.3.0",
     "typescript": "^5.3.3"
   },
+  "extensionDependencies": [
+    "vscode.git"
+  ],
   "simple-git-hooks": {
     "pre-commit": "npm run lint"
   },

src/helpers/command.ts

@@ -1,4 +1,4 @@
-import { type TextDocumentShowOptions, Uri, commands, window } from 'vscode'
+import { type TextDocumentShowOptions, type Uri, commands, window } from 'vscode'
 import { getExtensionContext, usePatchStore } from '../stores'
 import { exec, log, showLog } from '../utils'
 import {
@@ -116,8 +116,8 @@ export function registerAllCommands(): void {
   registerVsCodeCmd(
     'radicle.openOriginalVersionOfPatchedFile',
     async (node: FilechangeNode | undefined) => {
-      if (node?.oldVersionUrl) {
-        await commands.executeCommand('vscode.open', Uri.file(node.oldVersionUrl))
+      if (node?.oldVersionUri) {
+        await commands.executeCommand('vscode.open', node.oldVersionUri)
         commands.executeCommand('workbench.action.files.setActiveEditorReadonlyInSession')
       } else {
         log(
@@ -131,8 +131,8 @@ export function registerAllCommands(): void {
   registerVsCodeCmd(
     'radicle.openChangedVersionOfPatchedFile',
     async (node: FilechangeNode | undefined) => {
-      if (node?.newVersionUrl) {
-        await commands.executeCommand('vscode.open', Uri.file(node.newVersionUrl))
+      if (node?.newVersionUri) {
+        await commands.executeCommand('vscode.open', node.newVersionUri)
         commands.executeCommand('workbench.action.files.setActiveEditorReadonlyInSession')
       } else {
         log(