1 files changed, 59 insertions, 0 deletions

diff --git a/cli/internal/packagemanager/npm.go b/cli/internal/packagemanager/npm.go
new file mode 100644
index 0000000..ce2eb8c
--- /dev/null
+++ b/cli/internal/packagemanager/npm.go
@@ -0,0 +1,59 @@
+package packagemanager
+
+import (
+	"fmt"
+
+	"github.com/vercel/turbo/cli/internal/fs"
+	"github.com/vercel/turbo/cli/internal/lockfile"
+	"github.com/vercel/turbo/cli/internal/turbopath"
+)
+
+var nodejsNpm = PackageManager{
+	Name:         "nodejs-npm",
+	Slug:         "npm",
+	Command:      "npm",
+	Specfile:     "package.json",
+	Lockfile:     "package-lock.json",
+	PackageDir:   "node_modules",
+	ArgSeparator: []string{"--"},
+
+	getWorkspaceGlobs: func(rootpath turbopath.AbsoluteSystemPath) ([]string, error) {
+		pkg, err := fs.ReadPackageJSON(rootpath.UntypedJoin("package.json"))
+		if err != nil {
+			return nil, fmt.Errorf("package.json: %w", err)
+		}
+		if len(pkg.Workspaces) == 0 {
+			return nil, fmt.Errorf("package.json: no workspaces found. Turborepo requires npm workspaces to be defined in the root package.json")
+		}
+		return pkg.Workspaces, nil
+	},
+
+	getWorkspaceIgnores: func(pm PackageManager, rootpath turbopath.AbsoluteSystemPath) ([]string, error) {
+		// Matches upstream values:
+		// function: https://github.com/npm/map-workspaces/blob/a46503543982cb35f51cc2d6253d4dcc6bca9b32/lib/index.js#L73
+		// key code: https://github.com/npm/map-workspaces/blob/a46503543982cb35f51cc2d6253d4dcc6bca9b32/lib/index.js#L90-L96
+		// call site: https://github.com/npm/cli/blob/7a858277171813b37d46a032e49db44c8624f78f/lib/workspaces/get-workspaces.js#L14
+		return []string{
+			"**/node_modules/**",
+		}, nil
+	},
+
+	Matches: func(manager string, version string) (bool, error) {
+		return manager == "npm", nil
+	},
+
+	detect: func(projectDirectory turbopath.AbsoluteSystemPath, packageManager *PackageManager) (bool, error) {
+		specfileExists := projectDirectory.UntypedJoin(packageManager.Specfile).FileExists()
+		lockfileExists := projectDirectory.UntypedJoin(packageManager.Lockfile).FileExists()
+
+		return (specfileExists && lockfileExists), nil
+	},
+
+	canPrune: func(cwd turbopath.AbsoluteSystemPath) (bool, error) {
+		return true, nil
+	},
+
+	UnmarshalLockfile: func(_rootPackageJSON *fs.PackageJSON, contents []byte) (lockfile.Lockfile, error) {
+		return lockfile.DecodeNpmLockfile(contents)
+	},
+}