add pre commit hook

Author: himanshu-satija

.add-pre-commit-hook

@@ -0,0 +1,4 @@
+#!/bin/sh
+
+cp ./.pre-commit ./.git/hooks/pre-commit
+exit 0

.pre-commit

@@ -0,0 +1,48 @@
+#!/bin/zsh
+
+# function lintit () {
+#   OUTPUT=$(git diff --name-only | grep -E '(.js|.jsx)$')
+#   a=("${(f)OUTPUT}")
+#   e=$(npm run eslint $a)
+#   echo $e
+#   if [[ "$e" != *"0 errors"* ] || [ "$e" != *"0 errors"* ]]; then
+#     echo "ERROR: Check eslint hints."
+#     exit 1 # reject
+#   fi
+# }
+# lintit
+# exit 0
+
+STAGED_FILES=$(git diff --cached --name-only --diff-filter=ACM | grep ".jsx\{0,1\}$")
+
+if [[ "$STAGED_FILES" = "" ]]; then
+  exit 0
+fi
+
+PASS=true
+
+echo "\nValidating Javascript:\n"
+
+
+for FILE in $STAGED_FILES
+do
+  npm run eslint "$FILE"
+
+  if [[ "$?" == 0 ]]; then
+    echo "\t\033[32mESLint Passed: $FILE\033[0m"
+  else
+    echo "\t\033[41mESLint Failed: $FILE\033[0m"
+    PASS=false
+  fi
+done
+
+echo "\nJavascript validation completed!\n"
+
+if ! $PASS; then
+  echo "\033[41mCOMMIT FAILED:\033[0m Your commit contains files that should pass ESLint but do not. Please fix the ESLint errors and try again.\n"
+  exit 1
+else
+  echo "\033[42mCOMMIT SUCCEEDED\033[0m\n"
+fi
+
+exit $?

package.json

@@ -3,7 +3,7 @@
   "version": "5.2.0",
   "private": true,
   "scripts": {
-    "postinstall": "remotedev-debugger",
+    "postinstall": "remotedev-debugger && sh .add-pre-commit-hook",
     "start": "node_modules/react-native/packager/packager.sh",
     "eslint": "eslint"
   },