| 1 | // Copyright 2020 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 proxydir provides functions for writing module data to a directory |
| 6 | // in proxy format, so that it can be used as a module proxy by setting |
| 7 | // GOPROXY="file://<dir>". |
| 8 | package proxydir |
| 9 | |
| 10 | import ( |
| 11 | "archive/zip" |
| 12 | "fmt" |
| 13 | "io" |
| 14 | "io/ioutil" |
| 15 | "os" |
| 16 | "path/filepath" |
| 17 | "strings" |
| 18 | |
| 19 | "golang.org/x/tools/internal/testenv" |
| 20 | ) |
| 21 | |
| 22 | // WriteModuleVersion creates a directory in the proxy dir for a module. |
| 23 | func WriteModuleVersion(rootDir, module, ver string, files map[string][]byte) (rerr error) { |
| 24 | dir := filepath.Join(rootDir, module, "@v") |
| 25 | if err := os.MkdirAll(dir, 0755); err != nil { |
| 26 | return err |
| 27 | } |
| 28 | |
| 29 | // The go command checks for versions by looking at the "list" file. Since |
| 30 | // we are supporting multiple versions, create this file if it does not exist |
| 31 | // or append the version number to the preexisting file. |
| 32 | f, err := os.OpenFile(filepath.Join(dir, "list"), os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644) |
| 33 | if err != nil { |
| 34 | return err |
| 35 | } |
| 36 | defer checkClose("list file", f, &rerr) |
| 37 | if _, err := f.WriteString(ver + "\n"); err != nil { |
| 38 | return err |
| 39 | } |
| 40 | |
| 41 | // Serve the go.mod file on the <version>.mod url, if it exists. Otherwise, |
| 42 | // serve a stub. |
| 43 | modContents, ok := files["go.mod"] |
| 44 | if !ok { |
| 45 | modContents = []byte("module " + module) |
| 46 | } |
| 47 | if err := ioutil.WriteFile(filepath.Join(dir, ver+".mod"), modContents, 0644); err != nil { |
| 48 | return err |
| 49 | } |
| 50 | |
| 51 | // info file, just the bare bones. |
| 52 | infoContents := []byte(fmt.Sprintf(`{"Version": "%v", "Time":"2017-12-14T13:08:43Z"}`, ver)) |
| 53 | if err := ioutil.WriteFile(filepath.Join(dir, ver+".info"), infoContents, 0644); err != nil { |
| 54 | return err |
| 55 | } |
| 56 | |
| 57 | // zip of all the source files. |
| 58 | f, err = os.OpenFile(filepath.Join(dir, ver+".zip"), os.O_CREATE|os.O_WRONLY, 0644) |
| 59 | if err != nil { |
| 60 | return err |
| 61 | } |
| 62 | defer checkClose("zip file", f, &rerr) |
| 63 | z := zip.NewWriter(f) |
| 64 | defer checkClose("zip writer", z, &rerr) |
| 65 | for name, contents := range files { |
| 66 | zf, err := z.Create(module + "@" + ver + "/" + name) |
| 67 | if err != nil { |
| 68 | return err |
| 69 | } |
| 70 | if _, err := zf.Write(contents); err != nil { |
| 71 | return err |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | return nil |
| 76 | } |
| 77 | |
| 78 | func checkClose(name string, closer io.Closer, err *error) { |
| 79 | if cerr := closer.Close(); cerr != nil && *err == nil { |
| 80 | *err = fmt.Errorf("closing %s: %v", name, cerr) |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | // ToURL returns the file uri for a proxy directory. |
| 85 | func ToURL(dir string) string { |
| 86 | if testenv.Go1Point() >= 13 { |
| 87 | // file URLs on Windows must start with file:///. See golang.org/issue/6027. |
| 88 | path := filepath.ToSlash(dir) |
| 89 | if !strings.HasPrefix(path, "/") { |
| 90 | path = "/" + path |
| 91 | } |
| 92 | return "file://" + path |
| 93 | } else { |
| 94 | // Prior to go1.13, the Go command on Windows only accepted GOPROXY file URLs |
| 95 | // of the form file://C:/path/to/proxy. This was incorrect: when parsed, "C:" |
| 96 | // is interpreted as the host. See golang.org/issue/6027. This has been |
| 97 | // fixed in go1.13, but we emit the old format for old releases. |
| 98 | return "file://" + filepath.ToSlash(dir) |
| 99 | } |
| 100 | } |
| 101 |
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