75 lines
2.5 KiB
Go
75 lines
2.5 KiB
Go
/*
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* Copyright 2016, Google Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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package main
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import (
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"log"
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"os"
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"path/filepath"
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)
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// abs returns the absolute path the given relative file or directory path,
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// relative to the google.golang.org/grpc directory in the user's GOPATH.
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// If rel is already absolute, it is returned unmodified.
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func abs(rel string) string {
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if filepath.IsAbs(rel) {
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return rel
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}
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v, err := goPackagePath("google.golang.org/grpc")
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if err != nil {
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log.Fatalf("Error finding google.golang.org/grpc/testdata directory: %v", err)
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}
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return filepath.Join(v, rel)
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}
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func goPackagePath(pkg string) (path string, err error) {
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gp := os.Getenv("GOPATH")
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if gp == "" {
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return path, os.ErrNotExist
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}
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for _, p := range filepath.SplitList(gp) {
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dir := filepath.Join(p, "src", filepath.FromSlash(pkg))
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fi, err := os.Stat(dir)
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if os.IsNotExist(err) {
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continue
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}
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if err != nil {
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return "", err
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}
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if !fi.IsDir() {
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continue
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}
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return dir, nil
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}
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return path, os.ErrNotExist
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}
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