github.com/go-asm/go@v1.21.1-0.20240213172139-40c5ead50c48/cmd/go/cfg/lookpath.go (about)

     1  // Copyright 2023 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package cfg
     6  
     7  import (
     8  	"os/exec"
     9  
    10  	"github.com/go-asm/go/cmd/go/par"
    11  )
    12  
    13  var lookPathCache par.ErrCache[string, string]
    14  
    15  // LookPath wraps exec.LookPath and caches the result
    16  // which can be called by multiple Goroutines at the same time.
    17  func LookPath(file string) (path string, err error) {
    18  	return lookPathCache.Do(file,
    19  		func() (string, error) {
    20  			return exec.LookPath(file)
    21  		})
    22  }