Adding precommit hook

package-lock.json

@@ -15226,6 +15226,39 @@
         "uniqs": "2.0.0"
       }
     },
+    "pre-commit": {
+      "version": "1.2.2",
+      "resolved": "https://registry.npmjs.org/pre-commit/-/pre-commit-1.2.2.tgz",
+      "integrity": "sha1-287g7p3nI15X95xW186UZBpp7sY=",
+      "dev": true,
+      "requires": {
+        "cross-spawn": "5.1.0",
+        "spawn-sync": "1.0.15",
+        "which": "1.2.14"
+      },
+      "dependencies": {
+        "cross-spawn": {
+          "version": "5.1.0",
+          "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-5.1.0.tgz",
+          "integrity": "sha1-6L0O/uWPz/b4+UUQoKVUu/ojVEk=",
+          "dev": true,
+          "requires": {
+            "lru-cache": "4.1.1",
+            "shebang-command": "1.2.0",
+            "which": "1.2.14"
+          }
+        },
+        "which": {
+          "version": "1.2.14",
+          "resolved": "https://registry.npmjs.org/which/-/which-1.2.14.tgz",
+          "integrity": "sha1-mofEN48D6CfOyvGs31bHNsAcFOU=",
+          "dev": true,
+          "requires": {
+            "isexe": "2.0.0"
+          }
+        }
+      }
+    },
     "prelude-ls": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/prelude-ls/-/prelude-ls-1.1.2.tgz",

package.json

@@ -8,7 +8,8 @@
   "scripts": {
     "start": "node scripts/start.js",
     "build": "node scripts/build.js",
-    "test": "node scripts/test.js --env=jsdom"
+    "test": "node scripts/test.js --env=jsdom",
+    "precommit": "./precommit.sh"
   },
   "repository": {
     "type": "git",
@@ -20,6 +21,9 @@
     "url": "https://github.com/gnosis/gnosis-team-safe/issues"
   },
   "homepage": "https://github.com/gnosis/gnosis-team-safe#readme",
+  "pre-commit": [
+    "precommit"
+  ],
   "devDependencies": {
     "@babel/cli": "^7.0.0-beta.40",
     "@babel/core": "^7.0.0-beta.40",
@@ -51,6 +55,7 @@
     "json-loader": "^0.5.7",
     "postcss-loader": "^2.1.1",
     "postcss-simple-vars": "^4.1.0",
+    "pre-commit": "^1.2.2",
     "react": "^16.2.0",
     "react-dev-utils": "^5.0.0",
     "react-dom": "^16.2.0",

precommit.sh

@@ -0,0 +1,44 @@
+#!/bin/bash
+
+STAGED_FILES=$(git diff --cached --name-only --diff-filter=ACM | grep ".jsx\{0,1\}$")
+ESLINT="$(git rev-parse --show-toplevel)/node_modules/.bin/eslint"
+ADD_FILES_TO_COMMIT="git add ."
+
+if [[ "$STAGED_FILES" = "" ]]; then
+  exit 0
+fi
+
+PASS=true
+
+echo -e "\nValidating Javascript:\n"
+
+# Check for eslint
+if [[ ! -x "$ESLINT" ]]; then
+  echo -e "\t\033[41mPlease install ESlint\033[0m (npm i --save-dev eslint)"
+  exit 1
+fi
+
+for FILE in $STAGED_FILES
+do
+  "$ESLINT" "$FILE" "--fix"
+
+  if [[ "$?" == 0 ]]; then
+    echo -e "\t\033[32mESLint Passed: $FILE\033[0m"
+  else
+    echo -e "\t\033[41mESLint Failed: $FILE\033[0m"
+    PASS=false
+  fi
+done
+
+echo -e "\nJavascript validation completed!\n"
+
+if ! $PASS; then
+  echo -e "\033[0;31mCOMMIT FAILED, PLEASE FIX ESLINT ERRORS:\033[0m Your commit contains files that should pass ESLint but do not. Please fix the ESLint errors in a new commit.\n"
+  exit 1
+else
+  echo -e "\033[42mCOMMIT SUCCEEDED\033[0m\n"
+fi
+
+eval $ADD_FILES_TO_COMMIT
+
+exit $?