cmd/go: add Context parameter to base.command.Run

One small step to start propagating the context in
cmd/go for tracing purposes.

Updates #38714

Change-Id: Ibb6debeb9233f84d55f0e81244487355cbe7b82c
Reviewed-on: https://go-review.googlesource.com/c/go/+/237684
Run-TryBot: Michael Matloob <[email protected]>
TryBot-Result: Gobot Gobot <[email protected]>
Reviewed-by: Jay Conrod <[email protected]>
Reviewed-by: Bryan C. Mills <[email protected]>

Author: matloob

src/cmd/go/internal/base/base.go

@@ -7,6 +7,7 @@
 package base
 
 import (
+	"context"
 	"flag"
 	"fmt"
 	"log"
@@ -24,7 +25,7 @@ import (
 type Command struct {
 	// Run runs the command.
 	// The args are the arguments after the command name.
-	Run func(cmd *Command, args []string)
+	Run func(ctx context.Context, cmd *Command, args []string)
 
 	// UsageLine is the one-line usage message.
 	// The words between "go" and the first flag or argument in the line are taken to be the command name.

src/cmd/go/internal/bug/bug.go

@@ -7,6 +7,7 @@ package bug
 
 import (
 	"bytes"
+	"context"
 	"fmt"
 	"io"
 	"io/ioutil"
@@ -37,7 +38,7 @@ func init() {
 	CmdBug.Flag.BoolVar(&cfg.BuildV, "v", false, "")
 }
 
-func runBug(cmd *base.Command, args []string) {
+func runBug(ctx context.Context, cmd *base.Command, args []string) {
 	if len(args) > 0 {
 		base.Fatalf("go bug: bug takes no arguments")
 	}

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

@@ -6,6 +6,7 @@
 package clean
 
 import (
+	"context"
 	"fmt"
 	"io/ioutil"
 	"os"
@@ -105,7 +106,7 @@ func init() {
 	work.AddBuildFlags(CmdClean, work.DefaultBuildFlags)
 }
 
-func runClean(cmd *base.Command, args []string) {
+func runClean(ctx context.Context, cmd *base.Command, args []string) {
 	// golang.org/issue/29925: only load packages before cleaning if
 	// either the flags and arguments explicitly imply a package,
 	// or no other target (such as a cache) was requested to be cleaned.

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

@@ -8,6 +8,7 @@ package doc
 import (
 	"cmd/go/internal/base"
 	"cmd/go/internal/cfg"
+	"context"
 )
 
 var CmdDoc = &base.Command{
@@ -129,6 +130,6 @@ Flags:
 `,
 }
 
-func runDoc(cmd *base.Command, args []string) {
+func runDoc(ctx context.Context, cmd *base.Command, args []string) {
 	base.Run(cfg.BuildToolexec, base.Tool("doc"), args)
 }

src/cmd/go/internal/envcmd/env.go

@@ -6,6 +6,7 @@
 package envcmd
 
 import (
+	"context"
 	"encoding/json"
 	"fmt"
 	"go/build"
@@ -186,7 +187,7 @@ func argKey(arg string) string {
 	return arg[:i]
 }
 
-func runEnv(cmd *base.Command, args []string) {
+func runEnv(ctx context.Context, cmd *base.Command, args []string) {
 	if *envJson && *envU {
 		base.Fatalf("go env: cannot use -json with -u")
 	}

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

@@ -11,6 +11,7 @@ import (
 	"cmd/go/internal/load"
 	"cmd/go/internal/modload"
 	"cmd/go/internal/str"
+	"context"
 	"fmt"
 	"os"
 )
@@ -31,7 +32,7 @@ See also: go fmt, go vet.
 	`,
 }
 
-func runFix(cmd *base.Command, args []string) {
+func runFix(ctx context.Context, cmd *base.Command, args []string) {
 	printed := false
 	for _, pkg := range load.Packages(args) {
 		if modload.Enabled() && pkg.Module != nil && !pkg.Module.Main {

src/cmd/go/internal/fmtcmd/fmt.go

@@ -6,6 +6,7 @@
 package fmtcmd
 
 import (
+	"context"
 	"errors"
 	"fmt"
 	"os"
@@ -48,7 +49,7 @@ See also: go fix, go vet.
 	`,
 }
 
-func runFmt(cmd *base.Command, args []string) {
+func runFmt(ctx context.Context, cmd *base.Command, args []string) {
 	printed := false
 	gofmt := gofmtPath()
 	procs := runtime.GOMAXPROCS(0)

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

@@ -8,6 +8,7 @@ package generate
 import (
 	"bufio"
 	"bytes"
+	"context"
 	"fmt"
 	"go/parser"
 	"go/token"
@@ -160,7 +161,7 @@ func init() {
 	CmdGenerate.Flag.StringVar(&generateRunFlag, "run", "", "")
 }
 
-func runGenerate(cmd *base.Command, args []string) {
+func runGenerate(ctx context.Context, cmd *base.Command, args []string) {
 	load.IgnoreImports = true
 
 	if generateRunFlag != "" {

src/cmd/go/internal/get/get.go

@@ -6,6 +6,7 @@
 package get
 
 import (
+	"context"
 	"fmt"
 	"os"
 	"path/filepath"
@@ -112,7 +113,7 @@ func init() {
 	CmdGet.Flag.BoolVar(&Insecure, "insecure", Insecure, "")
 }
 
-func runGet(cmd *base.Command, args []string) {
+func runGet(ctx context.Context, cmd *base.Command, args []string) {
 	if cfg.ModulesEnabled {
 		// Should not happen: main.go should install the separate module-enabled get code.
 		base.Fatalf("go get: modules not implemented")

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

@@ -8,6 +8,7 @@ package list
 import (
 	"bufio"
 	"bytes"
+	"context"
 	"encoding/json"
 	"io"
 	"os"
@@ -309,7 +310,7 @@ var (
 
 var nl = []byte{'\n'}
 
-func runList(cmd *base.Command, args []string) {
+func runList(ctx context.Context, cmd *base.Command, args []string) {
 	modload.LoadTests = *listTest
 	work.BuildInit()
 	out := newTrackingWriter(os.Stdout)

src/cmd/go/internal/modcmd/download.go

@@ -5,6 +5,7 @@
 package modcmd
 
 import (
+	"context"
 	"encoding/json"
 	"os"
 
@@ -78,7 +79,7 @@ type moduleJSON struct {
 	GoModSum string `json:",omitempty"`
 }
 
-func runDownload(cmd *base.Command, args []string) {
+func runDownload(ctx context.Context, cmd *base.Command, args []string) {
 	// Check whether modules are enabled and whether we're in a module.
 	if cfg.Getenv("GO111MODULE") == "off" {
 		base.Fatalf("go: modules disabled by GO111MODULE=off; see 'go help modules'")

src/cmd/go/internal/modcmd/edit.go

@@ -8,6 +8,7 @@ package modcmd
 
 import (
 	"bytes"
+	"context"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -141,7 +142,7 @@ func init() {
 	base.AddBuildFlagsNX(&cmdEdit.Flag)
 }
 
-func runEdit(cmd *base.Command, args []string) {
+func runEdit(ctx context.Context, cmd *base.Command, args []string) {
 	anyFlags :=
 		*editModule != "" ||
 			*editGo != "" ||

src/cmd/go/internal/modcmd/graph.go

@@ -8,6 +8,7 @@ package modcmd
 
 import (
 	"bufio"
+	"context"
 	"os"
 	"sort"
 
@@ -36,7 +37,7 @@ func init() {
 	work.AddModCommonFlags(cmdGraph)
 }
 
-func runGraph(cmd *base.Command, args []string) {
+func runGraph(ctx context.Context, cmd *base.Command, args []string) {
 	if len(args) > 0 {
 		base.Fatalf("go mod graph: graph takes no arguments")
 	}

src/cmd/go/internal/modcmd/init.go

@@ -10,6 +10,7 @@ import (
 	"cmd/go/internal/base"
 	"cmd/go/internal/modload"
 	"cmd/go/internal/work"
+	"context"
 	"os"
 	"strings"
 )
@@ -32,7 +33,7 @@ func init() {
 	work.AddModCommonFlags(cmdInit)
 }
 
-func runInit(cmd *base.Command, args []string) {
+func runInit(ctx context.Context, cmd *base.Command, args []string) {
 	modload.CmdModInit = true
 	if len(args) > 1 {
 		base.Fatalf("go mod init: too many arguments")

src/cmd/go/internal/modcmd/tidy.go

@@ -12,6 +12,7 @@ import (
 	"cmd/go/internal/modfetch"
 	"cmd/go/internal/modload"
 	"cmd/go/internal/work"
+	"context"
 
 	"golang.org/x/mod/module"
 )
@@ -37,7 +38,7 @@ func init() {
 	work.AddModCommonFlags(cmdTidy)
 }
 
-func runTidy(cmd *base.Command, args []string) {
+func runTidy(ctx context.Context, cmd *base.Command, args []string) {
 	if len(args) > 0 {
 		base.Fatalf("go mod tidy: no arguments allowed")
 	}

src/cmd/go/internal/modcmd/vendor.go

@@ -6,6 +6,7 @@ package modcmd
 
 import (
 	"bytes"
+	"context"
 	"fmt"
 	"io"
 	"io/ioutil"
@@ -43,7 +44,7 @@ func init() {
 	work.AddModCommonFlags(cmdVendor)
 }
 
-func runVendor(cmd *base.Command, args []string) {
+func runVendor(ctx context.Context, cmd *base.Command, args []string) {
 	if len(args) != 0 {
 		base.Fatalf("go mod vendor: vendor takes no arguments")
 	}

src/cmd/go/internal/modcmd/verify.go

@@ -6,6 +6,7 @@ package modcmd
 
 import (
 	"bytes"
+	"context"
 	"errors"
 	"fmt"
 	"io/ioutil"
@@ -40,7 +41,7 @@ func init() {
 	work.AddModCommonFlags(cmdVerify)
 }
 
-func runVerify(cmd *base.Command, args []string) {
+func runVerify(ctx context.Context, cmd *base.Command, args []string) {
 	if len(args) != 0 {
 		// NOTE(rsc): Could take a module pattern.
 		base.Fatalf("go mod verify: verify takes no arguments")

src/cmd/go/internal/modcmd/why.go

@@ -5,6 +5,7 @@
 package modcmd
 
 import (
+	"context"
 	"fmt"
 	"strings"
 
@@ -60,7 +61,7 @@ func init() {
 	work.AddModCommonFlags(cmdWhy)
 }
 
-func runWhy(cmd *base.Command, args []string) {
+func runWhy(ctx context.Context, cmd *base.Command, args []string) {
 	loadALL := modload.LoadALL
 	if *whyVendor {
 		loadALL = modload.LoadVendor

src/cmd/go/internal/modget/get.go

@@ -6,6 +6,7 @@
 package modget
 
 import (
+	"context"
 	"errors"
 	"fmt"
 	"os"
@@ -259,7 +260,7 @@ type query struct {
 	m module.Version
 }
 
-func runGet(cmd *base.Command, args []string) {
+func runGet(ctx context.Context, cmd *base.Command, args []string) {
 	switch getU {
 	case "", "upgrade", "patch":
 		// ok

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

@@ -6,6 +6,7 @@
 package run
 
 import (
+	"context"
 	"fmt"
 	"os"
 	"path"
@@ -57,7 +58,7 @@ func printStderr(args ...interface{}) (int, error) {
 	return fmt.Fprint(os.Stderr, args...)
 }
 
-func runRun(cmd *base.Command, args []string) {
+func runRun(ctx context.Context, cmd *base.Command, args []string) {
 	work.BuildInit()
 	var b work.Builder
 	b.Init()

src/cmd/go/internal/test/test.go

@@ -6,6 +6,7 @@ package test
 
 import (
 	"bytes"
+	"context"
 	"crypto/sha256"
 	"errors"
 	"fmt"
@@ -565,7 +566,7 @@ var defaultVetFlags = []string{
 	// "-unusedresult",
 }
 
-func runTest(cmd *base.Command, args []string) {
+func runTest(ctx context.Context, cmd *base.Command, args []string) {
 	modload.LoadTests = true
 
 	pkgArgs, testArgs = testFlags(args)

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

@@ -6,6 +6,7 @@
 package tool
 
 import (
+	"context"
 	"fmt"
 	"os"
 	"os/exec"
@@ -48,7 +49,7 @@ func init() {
 	CmdTool.Flag.BoolVar(&toolN, "n", false, "")
 }
 
-func runTool(cmd *base.Command, args []string) {
+func runTool(ctx context.Context, cmd *base.Command, args []string) {
 	if len(args) == 0 {
 		listTools()
 		return

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

@@ -7,6 +7,7 @@ package version
 
 import (
 	"bytes"
+	"context"
 	"encoding/binary"
 	"fmt"
 	"os"
@@ -51,7 +52,7 @@ var (
 	versionV = CmdVersion.Flag.Bool("v", false, "")
 )
 
-func runVersion(cmd *base.Command, args []string) {
+func runVersion(ctx context.Context, cmd *base.Command, args []string) {
 	if len(args) == 0 {
 		if *versionM || *versionV {
 			fmt.Fprintf(os.Stderr, "go version: flags can only be used with arguments\n")