Add support for Bun (#104)

* Support `bun` package manager

* Remove changes caused by local formatter (oops)

README.md

@@ -2,7 +2,7 @@
 
 A GitHub action that reports changes in compressed file sizes on your PRs.
 
-- Automatically uses `yarn`, `pnpm` or `npm ci` when lockfiles are present
+- Automatically uses `yarn`, `pnpm`, `bun`, or `npm ci` when lockfiles are present
 - Builds your PR, then builds the target and compares between the two
 - Doesn't upload anything or rely on centralized storage
 - Supports [custom build scripts](#customizing-the-build) and [file patterns](#customizing-the-list-of-files)

src/index.js

@@ -52,6 +52,7 @@ async function run(octokit, context, token) {
 
 	let yarnLock = await fileExists(path.resolve(cwd, 'yarn.lock'));
 	let pnpmLock = await fileExists(path.resolve(cwd, 'pnpm-lock.yaml'));
+	let bunLock = await fileExists(path.resolve(cwd, 'bun.lockb'));
 	let packageLock = await fileExists(path.resolve(cwd, 'package-lock.json'));
 
 	let packageManager = 'npm';
@@ -62,6 +63,9 @@ async function run(octokit, context, token) {
 	} else if (pnpmLock) {
 		installScript = 'pnpm install --frozen-lockfile';
 		packageManager = 'pnpm';
+	} else if (bunLock) {
+		installScript = 'bun install --frozen-lockfile';
+		packageManager = 'bun';
 	} else if (packageLock) {
 		installScript = 'npm ci';
 	}
@@ -121,6 +125,7 @@ async function run(octokit, context, token) {
 
 	yarnLock = await fileExists(path.resolve(cwd, 'yarn.lock'));
 	pnpmLock = await fileExists(path.resolve(cwd, 'pnpm-lock.yaml'));
+	bunLock = await fileExists(path.resolve(cwd, 'bun.lockb'));
 	packageLock = await fileExists(path.resolve(cwd, 'package-lock.json'));
 
 	packageManager = 'npm';
@@ -131,6 +136,9 @@ async function run(octokit, context, token) {
 	} else if (pnpmLock) {
 		installScript = `pnpm install --frozen-lockfile`;
 		packageManager = `pnpm`;
+	} else if (bunLock) {
+		installScript = `bun install --frozen-lockfile`;
+		packageManager = `bun`;
 	} else if (packageLock) {
 		installScript = `npm ci`;
 	}