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 7package exec 8 9import ( 10 "errors" 11) 12 13// ErrNotFound is the error resulting if a path search failed to find an executable file. 14var 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. 20func 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. 27func lookExtensions(path, dir string) (string, error) { 28 return path, nil 29} 30