Merge pull request #28 from magopian/27-prettier-with-useful-output

Better output when running lint:prettier

lint_problems.sh

@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+set -eo pipefail
+
+prelude() {
+  echo "
+You have prettier linting errors!
+----------------------------------
+The following files would turn out different if you process them with prettier.
+
+"
+}
+
+any=false
+first=true
+while read line
+do
+  $first && prelude
+  echo "To fix:"
+  echo "    prettier --write ${line}"
+  echo "To see:"
+  echo "    prettier ${line} | diff ${line} -"
+  echo ""
+  # echo "$line"
+  any=true
+  first=false
+done < "${1:-/dev/stdin}"
+
+
+$any && echo "
+If you're not interested in how they're different, consider running:
+
+  yarn run lint:prettierfix
+"
+
+$any && exit 1 || exit 0

package.json

@@ -29,7 +29,7 @@
     "eject": "react-scripts eject",
     "lint:flow": "flow",
     "lint:less": "stylelint 'src/**/*.less' --config .stylelintrc",
-    "lint:prettier": "prettier src/**/*.js",
+    "lint:prettier": "prettier --list-different src/**/*.js | ./lint_problems.sh",
     "lint:prettierfix": "prettier src/**/*.js --write",
     "lint": "yarn run lint:flow && yarn run lint:prettier && yarn run lint:less"
   },