cmd/go: split out cmd/go/internal/clean,doc,fix,generate,list,run,tool,version,vet

This is one CL in a long sequence of changes to break up the
go command from one package into a plausible group of packages.

This sequence is concerned only with moving code, not changing
or cleaning up code. There will still be more cleanup after this sequence.

The entire sequence will be submitted together: it is not a goal
for the tree to build at every step.

For #18653.

Change-Id: Ib22fc435827d4a05a77a5200ac437ce00e2a4da3
Reviewed-on: https://go-review.googlesource.com/36204Reviewed-by: David Crawshaw <crawshaw@golang.org>

src/cmd/go/clean.go → src/cmd/go/internal/clean/clean.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package main
+package clean
 
 import (
 	"fmt"
@@ -17,7 +17,7 @@ import (
 	"cmd/go/internal/work"
 )
 
-var cmdClean = &base.Command{
+var CmdClean = &base.Command{
 	UsageLine: "clean [-i] [-r] [-n] [-x] [build flags] [packages]",
 	Short:     "remove object files",
 	Long: `
@@ -68,15 +68,15 @@ var cleanR bool // clean -r flag
 
 func init() {
 	// break init cycle
-	cmdClean.Run = runClean
+	CmdClean.Run = runClean
 
-	cmdClean.Flag.BoolVar(&cleanI, "i", false, "")
-	cmdClean.Flag.BoolVar(&cleanR, "r", false, "")
+	CmdClean.Flag.BoolVar(&cleanI, "i", false, "")
+	CmdClean.Flag.BoolVar(&cleanR, "r", false, "")
 	// -n and -x are important enough to be
 	// mentioned explicitly in the docs but they
 	// are part of the build flags.
 
-	work.AddBuildFlags(cmdClean)
+	work.AddBuildFlags(CmdClean)
 }
 
 func runClean(cmd *base.Command, args []string) {

src/cmd/go/doc.go → src/cmd/go/internal/doc/doc.go

@@ -2,16 +2,14 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:generate ./mkalldocs.sh
-
-package main
+package doc
 
 import (
 	"cmd/go/internal/base"
 	"cmd/go/internal/cfg"
 )
 
-var cmdDoc = &base.Command{
+var CmdDoc = &base.Command{
 	Run:         runDoc,
 	UsageLine:   "doc [-u] [-c] [package|[package.]symbol[.method]]",
 	CustomFlags: true,

src/cmd/go/fix.go → src/cmd/go/internal/fix/fix.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package main
+package fix
 
 import (
 	"cmd/go/internal/base"
@@ -11,7 +11,7 @@ import (
 	"cmd/go/internal/str"
 )
 
-var cmdFix = &base.Command{
+var CmdFix = &base.Command{
 	Run:       runFix,
 	UsageLine: "fix [packages]",
 	Short:     "run go tool fix on packages",

src/cmd/go/generate.go → src/cmd/go/internal/generate/generate.go

@@ -2,15 +2,11 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package main
+package generate
 
 import (
 	"bufio"
 	"bytes"
-	"cmd/go/internal/base"
-	"cmd/go/internal/cfg"
-	"cmd/go/internal/load"
-	"cmd/go/internal/work"
 	"fmt"
 	"io"
 	"log"
@@ -20,9 +16,14 @@ import (
 	"regexp"
 	"strconv"
 	"strings"
+
+	"cmd/go/internal/base"
+	"cmd/go/internal/cfg"
+	"cmd/go/internal/load"
+	"cmd/go/internal/work"
 )
 
-var cmdGenerate = &base.Command{
+var CmdGenerate = &base.Command{
 	Run:       runGenerate,
 	UsageLine: "generate [-run regexp] [-n] [-v] [-x] [build flags] [file.go... | packages]",
 	Short:     "generate Go files by processing source",
@@ -135,8 +136,8 @@ var (
 )
 
 func init() {
-	work.AddBuildFlags(cmdGenerate)
-	cmdGenerate.Flag.StringVar(&generateRunFlag, "run", "", "")
+	work.AddBuildFlags(CmdGenerate)
+	CmdGenerate.Flag.StringVar(&generateRunFlag, "run", "", "")
 }
 
 func runGenerate(cmd *base.Command, args []string) {

src/cmd/go/generate_test.go → src/cmd/go/internal/generate/generate_test.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package main
+package generate
 
 import (
 	"reflect"

src/cmd/go/pkg_test.go → src/cmd/go/internal/get/pkg_test.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package main
+package get
 
 import (
 	"cmd/go/internal/load"

src/cmd/go/tag_test.go → src/cmd/go/internal/get/tag_test.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package main
+package get
 
 import "testing"
 

src/cmd/go/vcs_test.go → src/cmd/go/internal/get/vcs_test.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package main
+package get
 
 import (
 	"errors"

src/cmd/go/context.go → src/cmd/go/internal/list/context.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package main
+package list
 
 import (
 	"go/build"

src/cmd/go/list.go → src/cmd/go/internal/list/list.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package main
+package list
 
 import (
 	"bufio"
@@ -17,7 +17,7 @@ import (
 	"text/template"
 )
 
-var cmdList = &base.Command{
+var CmdList = &base.Command{
 	UsageLine: "list [-e] [-f format] [-json] [build flags] [packages]",
 	Short:     "list packages",
 	Long: `
@@ -140,13 +140,13 @@ For more about specifying packages, see 'go help packages'.
 }
 
 func init() {
-	cmdList.Run = runList // break init cycle
-	work.AddBuildFlags(cmdList)
+	CmdList.Run = runList // break init cycle
+	work.AddBuildFlags(CmdList)
 }
 
-var listE = cmdList.Flag.Bool("e", false, "")
-var listFmt = cmdList.Flag.String("f", "{{.ImportPath}}", "")
-var listJson = cmdList.Flag.Bool("json", false, "")
+var listE = CmdList.Flag.Bool("e", false, "")
+var listFmt = CmdList.Flag.String("f", "{{.ImportPath}}", "")
+var listJson = CmdList.Flag.Bool("json", false, "")
 var nl = []byte{'\n'}
 
 func runList(cmd *base.Command, args []string) {

src/cmd/go/run.go → src/cmd/go/internal/run/run.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package main
+package run
 
 import (
 	"fmt"
@@ -16,7 +16,7 @@ import (
 	"cmd/go/internal/work"
 )
 
-var cmdRun = &base.Command{
+var CmdRun = &base.Command{
 	UsageLine: "run [build flags] [-exec xprog] gofiles... [arguments...]",
 	Short:     "compile and run Go program",
 	Long: `
@@ -40,10 +40,10 @@ See also: go build.
 }
 
 func init() {
-	cmdRun.Run = runRun // break init loop
+	CmdRun.Run = runRun // break init loop
 
-	work.AddBuildFlags(cmdRun)
-	cmdRun.Flag.Var((*base.StringsFlag)(&work.ExecCmd), "exec", "")
+	work.AddBuildFlags(CmdRun)
+	CmdRun.Flag.Var((*base.StringsFlag)(&work.ExecCmd), "exec", "")
 }
 
 func printStderr(args ...interface{}) (int, error) {

src/cmd/go/tool.go → src/cmd/go/internal/tool/tool.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package main
+package tool
 
 import (
 	"fmt"
@@ -15,7 +15,7 @@ import (
 	"cmd/go/internal/cfg"
 )
 
-var cmdTool = &base.Command{
+var CmdTool = &base.Command{
 	Run:       runTool,
 	UsageLine: "tool [-n] command [args...]",
 	Short:     "run specified go tool",
@@ -33,7 +33,7 @@ For more about each tool command, see 'go tool command -h'.
 var toolN bool
 
 func init() {
-	cmdTool.Flag.BoolVar(&toolN, "n", false, "")
+	CmdTool.Flag.BoolVar(&toolN, "n", false, "")
 }
 
 func runTool(cmd *base.Command, args []string) {

src/cmd/go/version.go → src/cmd/go/internal/version/version.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package main
+package version
 
 import (
 	"cmd/go/internal/base"
@@ -10,7 +10,7 @@ import (
 	"runtime"
 )
 
-var cmdVersion = &base.Command{
+var CmdVersion = &base.Command{
 	Run:       runVersion,
 	UsageLine: "version",
 	Short:     "print Go version",

src/cmd/go/vet.go → src/cmd/go/internal/vet/vet.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package main
+package vet
 
 import (
 	"path/filepath"
@@ -15,10 +15,10 @@ import (
 )
 
 func init() {
-	work.AddBuildFlags(cmdVet)
+	work.AddBuildFlags(CmdVet)
 }
 
-var cmdVet = &base.Command{
+var CmdVet = &base.Command{
 	Run:       runVet,
 	UsageLine: "vet [-n] [-x] [build flags] [packages]",
 	Short:     "run go tool vet on packages",

src/cmd/go/main.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:generate ./mkalldocs.sh
+
 package main
 
 import (
@@ -16,32 +18,41 @@ import (
 	"cmd/go/internal/base"
 	"cmd/go/internal/bug"
 	"cmd/go/internal/cfg"
+	"cmd/go/internal/clean"
+	"cmd/go/internal/doc"
 	"cmd/go/internal/env"
+	"cmd/go/internal/fix"
 	fmtcmd "cmd/go/internal/fmt"
+	"cmd/go/internal/generate"
 	"cmd/go/internal/get"
 	"cmd/go/internal/help"
+	"cmd/go/internal/list"
+	"cmd/go/internal/run"
 	"cmd/go/internal/test"
+	"cmd/go/internal/tool"
+	"cmd/go/internal/version"
+	"cmd/go/internal/vet"
 	"cmd/go/internal/work"
 )
 
 func init() {
 	base.Commands = []*base.Command{
 		work.CmdBuild,
-		cmdClean,
-		cmdDoc,
+		clean.CmdClean,
+		doc.CmdDoc,
 		env.CmdEnv,
 		bug.CmdBug,
-		cmdFix,
+		fix.CmdFix,
 		fmtcmd.CmdFmt,
-		cmdGenerate,
+		generate.CmdGenerate,
 		get.CmdGet,
 		work.CmdInstall,
-		cmdList,
-		cmdRun,
+		list.CmdList,
+		run.CmdRun,
 		test.CmdTest,
-		cmdTool,
-		cmdVersion,
-		cmdVet,
+		tool.CmdTool,
+		version.CmdVersion,
+		vet.CmdVet,
 
 		help.HelpC,
 		help.HelpBuildmode,
@@ -130,8 +141,6 @@ func main() {
 	base.Exit()
 }
 
-var usage func()
-
 func init() {
 	base.Usage = mainUsage
 }