fix(init): update package.json postinstall

Author: typicode

src/commands/init.ts

@@ -3,16 +3,22 @@ import { PackageJson } from 'type-fest'
 import { add } from './add'
 import { install } from './install'
 
+const regex = /^[ ]+|\t+/m
+
 export function init(): void {
   // Read package.json
-  const pkg = JSON.parse(
-    fs.readFileSync('package.json', 'utf-8')
-  ) as PackageJson
+  const str = fs.readFileSync('package.json', 'utf-8')
+  const pkg = JSON.parse(str) as PackageJson
 
   // Add postinstall script
-  if (pkg.scripts !== undefined) {
-    pkg.scripts.postinstall = 'husky install'
-  }
+  pkg.scripts ||= {}
+  pkg.scripts.postinstall = 'husky install'
+
+  // Write package.json
+  const indent = regex.exec(str)?.[0]
+  fs.writeFileSync('package.json', JSON.stringify(pkg, null, indent))
+
+  // Install husky
   install()
 
   // Add pre-commit sample

test/init.sh

@@ -13,9 +13,13 @@ init_git
 npx --no husky init
 npm set-script test "echo \"msg from pre-commit hook\" && exit 1"
 
+
 # Debug
 # cat .husky/*
 
+# Test package.json scripts
+grep '"postinstall": "husky install"' package.json || echo -e "\e[0;32mOK\e[m"
+
 # Test core.hooksPath
 test_hooksPath ".husky"