fix script for linting changed files (#17028)

development/get-changed-file-names.sh

@@ -0,0 +1,7 @@
+#! /bin/bash
+# This file exists because yarn 2+ seems to not be able to use the yarn 1
+# syntax in "scripts" to concatenate two commands output together using { }.
+# This script simply outputs both and then normal pipe operator syntax can be
+# used in the "scripts" key can be used to operate on the output.
+
+git ls-files --others --exclude-standard ; git diff-index --name-only --diff-filter=d HEAD ;

package.json

@@ -47,8 +47,8 @@
     "lint:fix": "yarn lint:prettier:fix && yarn lint:eslint:fix && yarn lint:styles:fix",
     "lint:prettier": "prettier --check -- **/*.json",
     "lint:prettier:fix": "prettier --write -- **/*.json",
-    "lint:changed": "{ git ls-files --others --exclude-standard ; git diff-index --name-only --diff-filter=d HEAD ; } | grep --regexp='[.]js$' | tr '\\n' '\\0' | xargs -0 eslint",
-    "lint:changed:fix": "{ git ls-files --others --exclude-standard ; git diff-index --name-only --diff-filter=d HEAD ; } | grep --regexp='[.]js$' | tr '\\n' '\\0' | xargs -0 eslint --fix",
+    "lint:changed": "./development/get-changed-file-names.sh | grep --regexp='[.]js$' | tr '\\n' '\\0' | xargs -0 eslint",
+    "lint:changed:fix": "./development/get-changed-file-names.sh | grep --regexp='[.]js$' | tr '\\n' '\\0' | xargs -0 eslint --fix",
     "lint:changelog": "auto-changelog validate",
     "lint:changelog:rc": "auto-changelog validate --rc",
     "lint:eslint": "eslint . --ext js,ts,tsx,snap --cache",