feat: generate treemending patch

scripts/install-vscode

@@ -3,9 +3,11 @@ set -e
 
 vscodeRef=$(cat './node_modules/monaco-editor/package.json' | jq -r '.["vscodeRef"]')
 
+monaco_esm_directory="`pwd`/node_modules/monaco-editor/esm"
 output_directory="`pwd`/vscode"
 extension_output_directory="`pwd`/vscode-default-extensions"
 patch_file="`pwd`/scripts/vscode.patch"
+editor_patch_file="`pwd`/monaco-editor-treemending.patch"
 version_info=$output_directory/version.info
 
 if [[ -e $version_info && $(cat $version_info) == $vscodeRef ]]; then
@@ -32,6 +34,26 @@ yarn install --ignore-scripts
 echo "Patching vscode..."
 patch -p1 < $patch_file
 
+# build editor without treeshaking to generate the treemending patch
+echo "Installing build dependencies"
+which node
+cd build
+yarn install --ignore-engines
+cd ..
+
+mkdir -p editor-patch
+cp -R $monaco_esm_directory editor-patch/a
+cp -R $monaco_esm_directory editor-patch/b
+## Change shake level from ClassMembers to Files
+sed -i 's/shakeLevel: 2/shakeLevel: 0/g' build/gulpfile.editor.js
+npx gulp editor-distro
+cd out-monaco-editor-core/esm/
+cp --parents $(find -name \*.js) ../../editor-patch/b
+cd ../../editor-patch
+diff -urN -x '*.map' a b > "$editor_patch_file" || true 
+cd ..
+# end treemending patch
+
 # copy default extensions
 rm -rf $extension_output_directory
 cp -R extensions "$extension_output_directory"