cmd/cue: add refactor imports command

This will make it easier to migrate between module
locations and major versions.

It's experimental for now.

Signed-off-by: Roger Peppe <[email protected]>
Change-Id: Icc86a3cc852d20ddecf19df143d2614ecd065dc0
Dispatch-Trailer: {"type":"trybot","CL":1207988,"patchset":9,"ref":"refs/changes/88/1207988/9","targetBranch":"master"}

cmd/cue/cmd/flags.go

@@ -24,15 +24,18 @@ import (
 const (
 	flagAll             flagName = "all"
 	flagAllErrors       flagName = "all-errors"
+	flagAllMajor        flagName = "all-major"
 	flagCheck           flagName = "check"
 	flagDiff            flagName = "diff"
 	flagDryRun          flagName = "dry-run"
 	flagEscape          flagName = "escape"
+	flagExact           flagName = "exact"
 	flagExpression      flagName = "expression"
 	flagExt             flagName = "ext"
 	flagFiles           flagName = "files"
 	flagForce           flagName = "force"
 	flagGlob            flagName = "name"
+	flagIdent           flagName = "ident"
 	flagIgnore          flagName = "ignore"
 	flagInject          flagName = "inject"
 	flagInjectVars      flagName = "inject-vars"
@@ -53,6 +56,7 @@ const (
 	flagSource          flagName = "source"
 	flagStrict          flagName = "strict"
 	flagTrace           flagName = "trace"
+	flagUpdateIdent     flagName = "update-ident"
 	flagVerbose         flagName = "verbose"
 	flagWithContext     flagName = "with-context"
 

cmd/cue/cmd/refactor.go

@@ -0,0 +1,48 @@
+// Copyright 2025 CUE Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+func newRefactorCmd(c *Command) *cobra.Command {
+	cmd := &cobra.Command{
+		// Experimental so far.
+		Hidden: true,
+
+		Use:   "refactor <cmd> [arguments]",
+		Short: "refactor and rewrite CUE code",
+		Long: `
+This command groups together commands relating
+to altering code within the current CUE module.
+`[1:],
+		RunE: mkRunE(c, func(cmd *Command, args []string) error {
+			stderr := cmd.Stderr()
+			if len(args) == 0 {
+				fmt.Fprintln(stderr, "refactor must be run as one of its subcommands")
+			} else {
+				fmt.Fprintf(stderr, "refactor must be run as one of its subcommands: unknown subcommand %q\n", args[0])
+			}
+			fmt.Fprintln(stderr, "Run 'cue help refactor' for known subcommands.")
+			return ErrPrintedError
+		}),
+	}
+
+	cmd.AddCommand(newRefactorImportsCmd(c))
+	return cmd
+}