fix(core): preserve package.json indent (#211)

Co-authored-by: lihbr <lihbr@users.noreply.github.com>
Co-authored-by: Daniel Roe <daniel@roe.dev>

package.json

@@ -51,6 +51,7 @@
  "chalk": "^4.1.1",
  "consola": "^2.15.3",
  "defu": "^5.0.0",
+ "detect-indent": "^6.0.0",
  "esbuild": "^0.12.5",
  "execa": "^5.0.1",
  "fs-extra": "^10.0.0",

src/core/package/index.ts

@@ -2,11 +2,12 @@ import { dirname, relative, resolve } from 'upath'
 
 import { bold } from 'chalk'
 import consola, { Consola } from 'consola'
+import detectIndent from 'detect-indent'
 import execa, { Options } from 'execa'
 import {
  copy,
  existsSync,
- readJSONSync,
+ readFileSync,
  writeFile,
  mkdirp,
  chmod,
@@ -83,6 +84,11 @@ export interface DefaultPackageOptions {
  * Whether to sort your `package.json` on build
  */
  sortDependencies?: boolean
+ /**
+ * The indent to use when writing `package.json`
+ * @default ` `
+ */
+ pkgIndent?: string
 }
 
 export type SirocOptions = Partial<DefaultPackageOptions>
@@ -128,17 +134,24 @@ export class Package {
  // Basic logger
  this.logger = consola
 
- this.pkg = this.loadPackageJSON()
+ // Get `package.json` as an object and its indentation type
+ const blob = this.loadPackageJSON(false)
+ this.pkg = JSON.parse(blob)
+ this.options.pkgIndent = this.options.pkgIndent || detectIndent(blob).indent
 
  // Use tagged logger
  this.logger = consola.withTag(this.pkg.name)
 
  this.loadConfig()
  }
 
- loadPackageJSON(): this['pkg'] {
+ loadPackageJSON(): this['pkg']
+ loadPackageJSON(parse: false): string
+ loadPackageJSON(parse = true) {
  try {
- return readJSONSync(this.resolvePath('package.json'))
+ const blob = readFileSync(this.resolvePath('package.json'), 'utf8')
+ if (parse) return JSON.parse(blob)
+ return blob
  } catch {
  if (this.options.rootDir === '/') {
  this.logger.error(
@@ -216,7 +229,10 @@ export class Package {
  async writePackage() {
  const pkgPath = this.resolvePath('package.json')
  this.logger.debug('Writing', pkgPath)
- await writeFile(pkgPath, JSON.stringify(this.pkg, null, 2) + '\n')
+ await writeFile(
+ pkgPath,
+ JSON.stringify(this.pkg, null, this.options.pkgIndent) + '\n'
+ )
  }
 
  /**

yarn.lock

@@ -8208,6 +8208,7 @@ __metadata:
  consola: ^2.15.3
  conventional-changelog-conventionalcommits: ^4.6.0
  defu: ^5.0.0
+ detect-indent: ^6.0.0
  esbuild: ^0.12.5
  eslint: ^7.27.0
  eslint-config-prettier: ^8.3.0