feat: uphold the prev package.json indents

lib/createInlinePluginCreator.js

@@ -3,7 +3,7 @@ const { once } = require("lodash");
 const { identity } = require("lodash");
 const EventEmitter = require("promise-events");
 const getCommitsFiltered = require("./getCommitsFiltered");
-const getManifest = require("./getManifest");
+const { getManifest, getIndent } = require("./getManifest");
 const hasChangedDeep = require("./hasChangedDeep");
 
 /**
@@ -57,6 +57,7 @@ function createInlinePluginCreator(packages, multiContext) {
 	const updateManifestDeps = (pkg, path) => {
 		// Get and parse manifest file contents.
 		const manifest = getManifest(path);
+		const indent = getIndent(path);
 
 		// Loop through localDeps to update dependencies/devDependencies/peerDependencies in manifest.
 		pkg._localDeps.forEach((d) => {
@@ -74,7 +75,7 @@ function createInlinePluginCreator(packages, multiContext) {
 		});
 
 		// Write package.json back out.
-		writeFileSync(path, JSON.stringify(manifest));
+		writeFileSync(path, JSON.stringify(manifest, null, indent));
 	};
 
 	/**

lib/getManifest.js

@@ -1,14 +1,14 @@
 const { existsSync, lstatSync, readFileSync } = require("fs");
 
 /**
- * Get the parsed contents of a package.json manifest file.
+ * Read the content of target package.json if exists.
  *
- * @param {string} path The path to the package.json manifest file.
- * @returns {object} The manifest file's contents.
+ * @param {string} path file path
+ * @returns {string} file content
  *
  * @internal
  */
-function getManifest(path) {
+function readManifest(path) {
 	// Check it exists.
 	if (!existsSync(path)) throw new ReferenceError(`package.json file not found: "${path}"`);
 
@@ -25,13 +25,41 @@ function getManifest(path) {
 	if (!stat.isFile()) throw new ReferenceError(`package.json is not a file: "${path}"`);
 
 	// Read the file.
-	let contents;
 	try {
-		contents = readFileSync(path, "utf8");
+		return readFileSync(path, "utf8");
 	} catch (_) {
 		// istanbul ignore next (hard to test — happens if no read access etc).
 		throw new ReferenceError(`package.json cannot be read: "${path}"`);
 	}
+}
+
+/**
+ * Extract the current indent sequence from file.
+ *
+ * @param {string} path The path to the package.json manifest file.
+ * @returns {string} indent symbols
+ *
+ * @internal
+ */
+function getIndent(path) {
+	// Read the file.
+	const contents = readManifest(path);
+	const match = /\n([^"]+)/.exec(contents);
+
+	return match ? match[1] : 2;
+}
+
+/**
+ * Get the parsed contents of a package.json manifest file.
+ *
+ * @param {string} path The path to the package.json manifest file.
+ * @returns {object} The manifest file's contents.
+ *
+ * @internal
+ */
+function getManifest(path) {
+	// Read the file.
+	const contents = readManifest(path);
 
 	// Parse the file.
 	let manifest;
@@ -65,4 +93,4 @@ function getManifest(path) {
 }
 
 // Exports.
-module.exports = getManifest;
+module.exports = { getManifest, getIndent };

lib/getWorkspacesYarn.js

@@ -1,5 +1,5 @@
 const glob = require("bash-glob");
-const getManifest = require("./getManifest");
+const { getManifest } = require("./getManifest");
 const { checker } = require("./blork");
 
 /**

lib/multiSemanticRelease.js

@@ -4,7 +4,7 @@ const { check } = require("./blork");
 const getLogger = require("./getLogger");
 const getConfig = require("./getConfig");
 const getConfigSemantic = require("./getConfigSemantic");
-const getManifest = require("./getManifest");
+const { getManifest } = require("./getManifest");
 const cleanPath = require("./cleanPath");
 const RescopedStream = require("./RescopedStream");
 const createInlinePluginCreator = require("./createInlinePluginCreator");