1 // Copyright 2018 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 //go:build wasm 6 7 package exec 8 9 import ( 10 "errors" 11 ) 12 13 // ErrNotFound is the error resulting if a path search failed to find an executable file. 14 var ErrNotFound = errors.New("executable file not found in $PATH") 15 16 // LookPath searches for an executable named file in the 17 // directories named by the PATH environment variable. 18 // If file contains a slash, it is tried directly and the PATH is not consulted. 19 // The result may be an absolute path or a path relative to the current directory. 20 func LookPath(file string) (string, error) { 21 // Wasm can not execute processes, so act as if there are no executables at all. 22 return "", &Error{file, ErrNotFound} 23 } 24 25 // lookExtensions is a no-op on non-Windows platforms, since 26 // they do not restrict executables to specific extensions. 27 func lookExtensions(path, dir string) (string, error) { 28 return path, nil 29 } 30