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cmd/go: add tool -n flag

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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
1 changed files with 15 additions and 1 deletions
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16
src/cmd/go/tool.go
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@ -17,12 +17,15 @@ import (
var cmdTool = &Command{ var cmdTool = &Command{
Run: runTool, Run: runTool,
UsageLine: "tool command [args...]", UsageLine: "tool [-n] command [args...]",
Short: "run specified go tool", Short: "run specified go tool",
Long: ` Long: `
Tool runs the go tool command identified by the arguments. Tool runs the go tool command identified by the arguments.
With no arguments it prints the list of known tools. 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'. For more about each tool command, see 'go tool command -h'.
`, `,
} }
@ -32,8 +35,14 @@ var (
toolGOARCH = runtime.GOARCH toolGOARCH = runtime.GOARCH
toolIsWindows = toolGOOS == "windows" toolIsWindows = toolGOOS == "windows"
toolDir = build.ToolDir toolDir = build.ToolDir
toolN bool
) )
func init() {
cmdTool.Flag.BoolVar(&toolN, "n", false, "")
}
const toolWindowsExtension = ".exe" const toolWindowsExtension = ".exe"
func tool(name string) string { func tool(name string) string {
@ -67,6 +76,11 @@ func runTool(cmd *Command, args []string) {
setExitStatus(3) setExitStatus(3)
return return
} }
if toolN {
fmt.Printf("%s %s\n", toolPath, strings.Join(args[1:], " "))
return
}
toolCmd := &exec.Cmd{ toolCmd := &exec.Cmd{
Path: toolPath, Path: toolPath,
Args: args, Args: args,