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cmd/go: add tool -n flag

As in gdb $(go tool -n 6g).

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5689066
This commit is contained in:
Russ Cox 2012-02-22 00:06:50 -05:00
parent 6d35302704
commit d1e1367cad

View File

@ -17,12 +17,15 @@ import (
var cmdTool = &Command{
Run: runTool,
UsageLine: "tool command [args...]",
UsageLine: "tool [-n] command [args...]",
Short: "run specified go tool",
Long: `
Tool runs the go tool command identified by the arguments.
With no arguments it prints the list of known tools.
The -n flag causes tool to print the command that would be
executed but not execute it.
For more about each tool command, see 'go tool command -h'.
`,
}
@ -32,8 +35,14 @@ var (
toolGOARCH = runtime.GOARCH
toolIsWindows = toolGOOS == "windows"
toolDir = build.ToolDir
toolN bool
)
func init() {
cmdTool.Flag.BoolVar(&toolN, "n", false, "")
}
const toolWindowsExtension = ".exe"
func tool(name string) string {
@ -67,6 +76,11 @@ func runTool(cmd *Command, args []string) {
setExitStatus(3)
return
}
if toolN {
fmt.Printf("%s %s\n", toolPath, strings.Join(args[1:], " "))
return
}
toolCmd := &exec.Cmd{
Path: toolPath,
Args: args,