go toolexec 源码
golang toolexec 代码
文件路径：/src/cmd/cover/testdata/toolexec.go
// Copyright 2018 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.
// The toolexec program is a helper program for cmd/cover tests.
// It is used so that the go tool will call the newly built version
// of the cover program, rather than the installed one.
//
// The tests arrange to run the go tool with the argument
// -toolexec="/path/to/toolexec /path/to/testcover"
// The go tool will invoke this program (compiled into /path/to/toolexec)
// with the arguments shown above followed by the command to run.
// This program will check whether it is expected to run the cover
// program, and if so replace it with /path/to/testcover.
package main
import (
"os"
"os/exec"
"strings"
)
func main() {
if strings.HasSuffix(strings.TrimSuffix(os.Args[2], ".exe"), "cover") {
os.Args[2] = os.Args[1]
}
cmd := exec.Command(os.Args[2], os.Args[3:]...)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
if err := cmd.Run(); err != nil {
os.Exit(1)
}
}
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