feat: detect package manager

Author: piotr-layerzero

README.md

@@ -60,6 +60,3 @@ Moreover, deployment statuses are reported as successful even when builds are sk
 Then, it proceeds to check whether the given package or any of its dependencies were modified since the last commit with the use of `git diff "HEAD^" "HEAD" --quiet`.
 
 Currently, only `pnpm` and `yarn` workspaces are supported but more is on the roadmap.
-
-### Yarn workspaces
-If you are using `yarn` workspaces pass `--yarn` flag

src/detectPackageManager.ts

@@ -0,0 +1,16 @@
+import Path from "node:path";
+import { PackageManager } from "./types.js";
+import { isRootDir as isPnpmRootDir } from "./pnpmWorkspace.js";
+import { isRootDir as isYarnRootDir } from "./yarnWorkspace.js";
+
+export function detectPackageManager(cwd: string): PackageManager {
+	const paths = cwd
+		.split(Path.sep)
+		.map((_, idx) => Path.join(cwd, "../".repeat(idx)));
+
+	for (const path of paths) {
+		if (isPnpmRootDir(path)) return "pnpm";
+		if (isYarnRootDir(path)) return "yarn";
+	}
+	throw new Error("Package manager could not be detected");
+}

src/index.ts

@@ -8,6 +8,8 @@ import * as yarn from "./yarnWorkspace.js";
 import { compare } from "./git.js";
 import { debug } from "./debug.js";
 import { parseArgs } from "./parseArgs.js";
+import { PackageManager } from "./types.js";
+import { detectPackageManager } from "./detectPackageManager.js";
 
 const cwd = process.cwd();
 
@@ -21,21 +23,21 @@ const configuration = parseArgs({
 			type: "boolean",
 			default: false,
 		},
-		yarn: {
-			type: "boolean",
-			default: false,
-		},
 	},
 });
 
+const log = debug(configuration.values.verbose);
+
+const packageManager: PackageManager = detectPackageManager(cwd);
+
+log({ packageManager });
+
 const {
 	readWorkspaceDirs,
 	readWorkspaceSettings,
 	resolveWorkspaceDeps,
 	isRootDir,
-} = configuration.values.yarn ? yarn : pnpm;
-
-const log = debug(configuration.values.verbose);
+} = packageManager === "pnpm" ? pnpm : yarn;
 
 const [gitFromPointer = "HEAD^", gitToPointer = "HEAD"] =
 	configuration.positionals;

src/pnpmWorkspace.ts

@@ -2,12 +2,12 @@ import { readFile, readdir } from "node:fs/promises";
 import Path from "node:path";
 import { existsSync } from "node:fs";
 import { fileExist, readJson } from "./utils.js";
-import { Ctx, Workspace, PackageJson } from "./types.js";
+import { Ctx, Workspace, PackageJson, WorkspaceSettings } from "./types.js";
 
-export async function readWorkspaceSettings({ rootDir, cwd }: Ctx): Promise<{
-	workspaces: Record<string, Workspace>;
-	currentWorkspace: Workspace;
-}> {
+export async function readWorkspaceSettings({
+	rootDir,
+	cwd,
+}: Ctx): Promise<WorkspaceSettings> {
 	const workspaceDirs = await readWorkspaceDirs({ rootDir, cwd });
 
 	const workspaces = (await Promise.all(workspaceDirs.map(findPackagesInDir)))

src/types.ts

@@ -19,3 +19,5 @@ export type WorkspaceSettings = {
 	workspaces: Record<string, Workspace>;
 	currentWorkspace: Workspace;
 };
+
+export type PackageManager = "yarn" | "npm" | "pnpm";