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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"fmt"
"os"
"os/exec"
"strings"
)
var cmdRun = &Command{
UsageLine: "run [build flags] gofiles... [arguments...]",
Short: "compile and run Go program",
Long: `
Run compiles and runs the main package comprising the named Go source files.
For more about build flags, see 'go help build'.
See also: go build.
`,
}
func init() {
cmdRun.Run = runRun // break init loop
addBuildFlags(cmdRun)
}
func printStderr(args ...interface{}) (int, error) {
return fmt.Fprint(os.Stderr, args...)
}
func runRun(cmd *Command, args []string) {
var b builder
b.init()
b.print = printStderr
i := 0
for i < len(args) && strings.HasSuffix(args[i], ".go") {
i++
}
files, cmdArgs := args[:i], args[i:]
if len(files) == 0 {
fatalf("go run: no go files listed")
}
p := goFilesPackage(files)
if p.Error != nil {
fatalf("%s", p.Error)
}
if p.Name != "main" {
fatalf("go run: cannot run non-main package")
}
p.target = "" // must build - not up to date
a1 := b.action(modeBuild, modeBuild, p)
a := &action{f: (*builder).runProgram, args: cmdArgs, deps: []*action{a1}}
b.do(a)
}
// runProgram is the action for running a binary that has already
// been compiled. We ignore exit status.
func (b *builder) runProgram(a *action) error {
if buildN || buildX {
b.showcmd("", "%s %s", a.deps[0].target, strings.Join(a.args, " "))
if buildN {
return nil
}
}
runStdin(a.deps[0].target, a.args)
return nil
}
// runStdin is like run, but connects Stdin.
func runStdin(cmdargs ...interface{}) {
cmdline := stringList(cmdargs...)
cmd := exec.Command(cmdline[0], cmdline[1:]...)
cmd.Stdin = os.Stdin
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
if err := cmd.Run(); err != nil {
errorf("%v", err)
}
}
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