feat: Add npmrc support check for Bun package manager (fixes: #93)

This commit introduces a check to determine if the Bun package manager
supports npmrc. If the version of Bun is 1.1.18 or higher, it is
considered to support npmrc. This information is used to decide whether
to create a bunfig.toml file or not. The tests have been updated
accordingly to check for either bunfig.toml or .npmrc based on the
version of Bun.

src/commands.ts

@@ -94,8 +94,10 @@ export async function install(packages: JsrPackage[], options: InstallOptions) {
   );
 
   if (packages.length > 0) {
-    if (pkgManager instanceof Bun) {
-      // Bun doesn't support reading from .npmrc yet
+    if (pkgManager instanceof Bun && !(await pkgManager.isNpmrcSupported())) {
+      // Bun v1.1.17 or lower doesn't support reading from .npmrc
+      // Bun v1.1.18+ supports npmrc
+      // https://bun.sh/blog/bun-v1.1.18#npmrc-support
       await setupBunfigToml(root);
     } else if (pkgManager instanceof YarnBerry) {
       // Yarn v2+ does not read from .npmrc intentionally

src/pkg_manager.ts

@@ -3,6 +3,7 @@ import { getLatestPackageVersion } from "./api";
 import { InstallOptions } from "./commands";
 import { exec, findProjectDir, JsrPackage, logDebug } from "./utils";
 import * as kl from "kolorist";
+import semiver from "semiver";
 
 async function execWithLog(cmd: string, args: string[], cwd: string) {
   console.log(kl.dim(`$ ${cmd} ${args.join(" ")}`));
@@ -180,6 +181,12 @@ export class Bun implements PackageManager {
   async runScript(script: string) {
     await execWithLog("bun", ["run", script], this.cwd);
   }
+
+  async isNpmrcSupported() {
+    const version = await exec("bun", ["--version"], this.cwd, undefined, true);
+    // bun v1.1.18 supports npmrc https://bun.sh/blog/bun-v1.1.18#npmrc-support
+    return version != null && semiver(version, "1.1.18") >= 0;
+  }
 }
 
 export type PkgManagerName = "npm" | "yarn" | "pnpm" | "bun";

test/commands.test.ts

@@ -4,6 +4,7 @@ import * as kl from "kolorist";
 import {
   DenoJson,
   enableYarnBerry,
+  isBunSupportNpmrc,
   isDirectory,
   isFile,
   runInTempDir,
@@ -443,8 +444,17 @@ describe("install", () => {
             "bun lockfile not created",
           );
 
-          const config = await readTextFile(path.join(dir, "bunfig.toml"));
-          assert.match(config, /"@jsr"\s+=/, "bunfig.toml not created");
+          if (await isBunSupportNpmrc(dir)) {
+            const npmrcPath = path.join(dir, ".npmrc");
+            const npmRc = await readTextFile(npmrcPath);
+            assert.ok(
+              npmRc.includes("@jsr:registry=https://npm.jsr.io"),
+              "Missing npmrc registry",
+            );
+          } else {
+            const config = await readTextFile(path.join(dir, "bunfig.toml"));
+            assert.match(config, /"@jsr"\s+=/, "bunfig.toml not created");
+          }
         },
       );
     });
@@ -453,8 +463,18 @@ describe("install", () => {
         ["i", "--bun", "@std/[email protected]"],
         async (dir) => {
           await runJsr(["i", "--bun", "@std/[email protected]"], dir);
-          const config = await readTextFile(path.join(dir, "bunfig.toml"));
-          assert.match(config, /"@jsr"\s+=/, "bunfig.toml not created");
+
+          if (await isBunSupportNpmrc(dir)) {
+            const npmrcPath = path.join(dir, ".npmrc");
+            const npmRc = await readTextFile(npmrcPath);
+            assert.ok(
+              npmRc.includes("@jsr:registry=https://npm.jsr.io"),
+              "Missing npmrc registry",
+            );
+          } else {
+            const config = await readTextFile(path.join(dir, "bunfig.toml"));
+            assert.match(config, /"@jsr"\s+=/, "bunfig.toml not created");
+          }
         },
       );
     });

test/test_utils.ts

@@ -1,6 +1,7 @@
 import * as fs from "node:fs";
 import * as path from "node:path";
 import * as os from "node:os";
+import semiver from 'semiver';
 import { exec, writeJson } from "../src/utils";
 
 export interface DenoJson {
@@ -32,6 +33,12 @@ export async function runJsr(
   }, captureOutput);
 }
 
+export async function isBunSupportNpmrc(cwd: string){
+  const version = await exec("bun", ["--version"], cwd, undefined, true);
+  // bun v1.1.18 supports npmrc https://bun.sh/blog/bun-v1.1.18#npmrc-support
+  return version != null && semiver(version, "1.1.18") >= 0;
+}
+
 export async function runInTempDir(fn: (dir: string) => Promise<void>) {
   const dir = await fs.promises.mkdtemp(path.join(os.tmpdir(), "jsr-cli"));