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// 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.

//go:build wasm

package exec

import (
	"errors"
)

// ErrNotFound is the error resulting if a path search failed to find an executable file.
var ErrNotFound = errors.New("executable file not found in $PATH")

// LookPath searches for an executable named file in the
// directories named by the PATH environment variable.
// If file contains a slash, it is tried directly and the PATH is not consulted.
// The result may be an absolute path or a path relative to the current directory.
func LookPath(file string) (string, error) {
	// Wasm can not execute processes, so act as if there are no executables at all.
	return "", &Error{file, ErrNotFound}
}

// lookExtensions is a no-op on non-Windows platforms, since
// they do not restrict executables to specific extensions.
func lookExtensions(path, dir string) (string, error) {
	return path, nil
}