1 files changed, 54 insertions, 0 deletions
diff --git a/src/cmd/go/internal/modcmd/initwork.go b/src/cmd/go/internal/modcmd/initwork.go
new file mode 100644
index 00000000000..4182aa071d7
--- /dev/null
+++ b/src/cmd/go/internal/modcmd/initwork.go
@@ -0,0 +1,54 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// go mod initwork
+
+package modcmd
+
+import (
+	"cmd/go/internal/base"
+	"cmd/go/internal/modload"
+	"context"
+	"path/filepath"
+)
+
+var _ = modload.TODOWorkspaces("Add more documentation below. Though this is" +
+	"enough for those trying workspaces out, there should be more through" +
+	"documentation if the proposal is accepted and released.")
+
+var cmdInitwork = &base.Command{
+	UsageLine: "go mod initwork [moddirs]",
+	Short:     "initialize workspace file",
+	Long: `go mod initwork initializes and writes a new go.work file in the current
+directory, in effect creating a new workspace at the current directory.
+
+go mod initwork optionally accepts paths to the workspace modules as arguments.
+If the argument is omitted, an empty workspace with no modules will be created.
+
+See the workspaces design proposal at
+https://go.googlesource.com/proposal/+/master/design/45713-workspace.md for
+more information.
+`,
+	Run: runInitwork,
+}
+
+func init() {
+	base.AddModCommonFlags(&cmdInitwork.Flag)
+	base.AddWorkfileFlag(&cmdInitwork.Flag)
+}
+
+func runInitwork(ctx context.Context, cmd *base.Command, args []string) {
+	modload.InitWorkfile()
+
+	modload.ForceUseModules = true
+
+	// TODO(matloob): support using the -workfile path
+	// To do that properly, we'll have to make the module directories
+	// make dirs relative to workFile path before adding the paths to
+	// the directory entries
+
+	workFile := filepath.Join(base.Cwd(), "go.work")
+
+	modload.CreateWorkFile(ctx, workFile, args)
+}