mirror of
https://github.com/restic/restic.git
synced 2024-08-21 11:53:22 +02:00
Among others, this updates minio-go, so that the new "eu-west-3" zone for AWS is supported.
334 lines
10 KiB
Go
334 lines
10 KiB
Go
// Copyright 2015 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.
|
|
|
|
// Package gen contains common code for the various code generation tools in the
|
|
// text repository. Its usage ensures consistency between tools.
|
|
//
|
|
// This package defines command line flags that are common to most generation
|
|
// tools. The flags allow for specifying specific Unicode and CLDR versions
|
|
// in the public Unicode data repository (http://www.unicode.org/Public).
|
|
//
|
|
// A local Unicode data mirror can be set through the flag -local or the
|
|
// environment variable UNICODE_DIR. The former takes precedence. The local
|
|
// directory should follow the same structure as the public repository.
|
|
//
|
|
// IANA data can also optionally be mirrored by putting it in the iana directory
|
|
// rooted at the top of the local mirror. Beware, though, that IANA data is not
|
|
// versioned. So it is up to the developer to use the right version.
|
|
package gen // import "golang.org/x/text/internal/gen"
|
|
|
|
import (
|
|
"bytes"
|
|
"flag"
|
|
"fmt"
|
|
"go/build"
|
|
"go/format"
|
|
"io"
|
|
"io/ioutil"
|
|
"log"
|
|
"net/http"
|
|
"os"
|
|
"path"
|
|
"path/filepath"
|
|
"strings"
|
|
"sync"
|
|
"unicode"
|
|
|
|
"golang.org/x/text/unicode/cldr"
|
|
)
|
|
|
|
var (
|
|
url = flag.String("url",
|
|
"http://www.unicode.org/Public",
|
|
"URL of Unicode database directory")
|
|
iana = flag.String("iana",
|
|
"http://www.iana.org",
|
|
"URL of the IANA repository")
|
|
unicodeVersion = flag.String("unicode",
|
|
getEnv("UNICODE_VERSION", unicode.Version),
|
|
"unicode version to use")
|
|
cldrVersion = flag.String("cldr",
|
|
getEnv("CLDR_VERSION", cldr.Version),
|
|
"cldr version to use")
|
|
)
|
|
|
|
func getEnv(name, def string) string {
|
|
if v := os.Getenv(name); v != "" {
|
|
return v
|
|
}
|
|
return def
|
|
}
|
|
|
|
// Init performs common initialization for a gen command. It parses the flags
|
|
// and sets up the standard logging parameters.
|
|
func Init() {
|
|
log.SetPrefix("")
|
|
log.SetFlags(log.Lshortfile)
|
|
flag.Parse()
|
|
}
|
|
|
|
const header = `// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
|
|
|
|
`
|
|
|
|
// UnicodeVersion reports the requested Unicode version.
|
|
func UnicodeVersion() string {
|
|
return *unicodeVersion
|
|
}
|
|
|
|
// CLDRVersion reports the requested CLDR version.
|
|
func CLDRVersion() string {
|
|
return *cldrVersion
|
|
}
|
|
|
|
var tags = []struct{ version, buildTags string }{
|
|
{"10.0.0", "go1.10"},
|
|
{"", "!go1.10"},
|
|
}
|
|
|
|
// buildTags reports the build tags used for the current Unicode version.
|
|
func buildTags() string {
|
|
v := UnicodeVersion()
|
|
for _, x := range tags {
|
|
// We should do a numeric comparison, but including the collate package
|
|
// would create an import cycle. We approximate it by assuming that
|
|
// longer version strings are later.
|
|
if len(x.version) <= len(v) {
|
|
return x.buildTags
|
|
}
|
|
if len(x.version) == len(v) && x.version <= v {
|
|
return x.buildTags
|
|
}
|
|
}
|
|
return tags[0].buildTags
|
|
}
|
|
|
|
// IsLocal reports whether data files are available locally.
|
|
func IsLocal() bool {
|
|
dir, err := localReadmeFile()
|
|
if err != nil {
|
|
return false
|
|
}
|
|
if _, err = os.Stat(dir); err != nil {
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
|
|
// OpenUCDFile opens the requested UCD file. The file is specified relative to
|
|
// the public Unicode root directory. It will call log.Fatal if there are any
|
|
// errors.
|
|
func OpenUCDFile(file string) io.ReadCloser {
|
|
return openUnicode(path.Join(*unicodeVersion, "ucd", file))
|
|
}
|
|
|
|
// OpenCLDRCoreZip opens the CLDR core zip file. It will call log.Fatal if there
|
|
// are any errors.
|
|
func OpenCLDRCoreZip() io.ReadCloser {
|
|
return OpenUnicodeFile("cldr", *cldrVersion, "core.zip")
|
|
}
|
|
|
|
// OpenUnicodeFile opens the requested file of the requested category from the
|
|
// root of the Unicode data archive. The file is specified relative to the
|
|
// public Unicode root directory. If version is "", it will use the default
|
|
// Unicode version. It will call log.Fatal if there are any errors.
|
|
func OpenUnicodeFile(category, version, file string) io.ReadCloser {
|
|
if version == "" {
|
|
version = UnicodeVersion()
|
|
}
|
|
return openUnicode(path.Join(category, version, file))
|
|
}
|
|
|
|
// OpenIANAFile opens the requested IANA file. The file is specified relative
|
|
// to the IANA root, which is typically either http://www.iana.org or the
|
|
// iana directory in the local mirror. It will call log.Fatal if there are any
|
|
// errors.
|
|
func OpenIANAFile(path string) io.ReadCloser {
|
|
return Open(*iana, "iana", path)
|
|
}
|
|
|
|
var (
|
|
dirMutex sync.Mutex
|
|
localDir string
|
|
)
|
|
|
|
const permissions = 0755
|
|
|
|
func localReadmeFile() (string, error) {
|
|
p, err := build.Import("golang.org/x/text", "", build.FindOnly)
|
|
if err != nil {
|
|
return "", fmt.Errorf("Could not locate package: %v", err)
|
|
}
|
|
return filepath.Join(p.Dir, "DATA", "README"), nil
|
|
}
|
|
|
|
func getLocalDir() string {
|
|
dirMutex.Lock()
|
|
defer dirMutex.Unlock()
|
|
|
|
readme, err := localReadmeFile()
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
dir := filepath.Dir(readme)
|
|
if _, err := os.Stat(readme); err != nil {
|
|
if err := os.MkdirAll(dir, permissions); err != nil {
|
|
log.Fatalf("Could not create directory: %v", err)
|
|
}
|
|
ioutil.WriteFile(readme, []byte(readmeTxt), permissions)
|
|
}
|
|
return dir
|
|
}
|
|
|
|
const readmeTxt = `Generated by golang.org/x/text/internal/gen. DO NOT EDIT.
|
|
|
|
This directory contains downloaded files used to generate the various tables
|
|
in the golang.org/x/text subrepo.
|
|
|
|
Note that the language subtag repo (iana/assignments/language-subtag-registry)
|
|
and all other times in the iana subdirectory are not versioned and will need
|
|
to be periodically manually updated. The easiest way to do this is to remove
|
|
the entire iana directory. This is mostly of concern when updating the language
|
|
package.
|
|
`
|
|
|
|
// Open opens subdir/path if a local directory is specified and the file exists,
|
|
// where subdir is a directory relative to the local root, or fetches it from
|
|
// urlRoot/path otherwise. It will call log.Fatal if there are any errors.
|
|
func Open(urlRoot, subdir, path string) io.ReadCloser {
|
|
file := filepath.Join(getLocalDir(), subdir, filepath.FromSlash(path))
|
|
return open(file, urlRoot, path)
|
|
}
|
|
|
|
func openUnicode(path string) io.ReadCloser {
|
|
file := filepath.Join(getLocalDir(), filepath.FromSlash(path))
|
|
return open(file, *url, path)
|
|
}
|
|
|
|
// TODO: automatically periodically update non-versioned files.
|
|
|
|
func open(file, urlRoot, path string) io.ReadCloser {
|
|
if f, err := os.Open(file); err == nil {
|
|
return f
|
|
}
|
|
r := get(urlRoot, path)
|
|
defer r.Close()
|
|
b, err := ioutil.ReadAll(r)
|
|
if err != nil {
|
|
log.Fatalf("Could not download file: %v", err)
|
|
}
|
|
os.MkdirAll(filepath.Dir(file), permissions)
|
|
if err := ioutil.WriteFile(file, b, permissions); err != nil {
|
|
log.Fatalf("Could not create file: %v", err)
|
|
}
|
|
return ioutil.NopCloser(bytes.NewReader(b))
|
|
}
|
|
|
|
func get(root, path string) io.ReadCloser {
|
|
url := root + "/" + path
|
|
fmt.Printf("Fetching %s...", url)
|
|
defer fmt.Println(" done.")
|
|
resp, err := http.Get(url)
|
|
if err != nil {
|
|
log.Fatalf("HTTP GET: %v", err)
|
|
}
|
|
if resp.StatusCode != 200 {
|
|
log.Fatalf("Bad GET status for %q: %q", url, resp.Status)
|
|
}
|
|
return resp.Body
|
|
}
|
|
|
|
// TODO: use Write*Version in all applicable packages.
|
|
|
|
// WriteUnicodeVersion writes a constant for the Unicode version from which the
|
|
// tables are generated.
|
|
func WriteUnicodeVersion(w io.Writer) {
|
|
fmt.Fprintf(w, "// UnicodeVersion is the Unicode version from which the tables in this package are derived.\n")
|
|
fmt.Fprintf(w, "const UnicodeVersion = %q\n\n", UnicodeVersion())
|
|
}
|
|
|
|
// WriteCLDRVersion writes a constant for the CLDR version from which the
|
|
// tables are generated.
|
|
func WriteCLDRVersion(w io.Writer) {
|
|
fmt.Fprintf(w, "// CLDRVersion is the CLDR version from which the tables in this package are derived.\n")
|
|
fmt.Fprintf(w, "const CLDRVersion = %q\n\n", CLDRVersion())
|
|
}
|
|
|
|
// WriteGoFile prepends a standard file comment and package statement to the
|
|
// given bytes, applies gofmt, and writes them to a file with the given name.
|
|
// It will call log.Fatal if there are any errors.
|
|
func WriteGoFile(filename, pkg string, b []byte) {
|
|
w, err := os.Create(filename)
|
|
if err != nil {
|
|
log.Fatalf("Could not create file %s: %v", filename, err)
|
|
}
|
|
defer w.Close()
|
|
if _, err = WriteGo(w, pkg, "", b); err != nil {
|
|
log.Fatalf("Error writing file %s: %v", filename, err)
|
|
}
|
|
}
|
|
|
|
func insertVersion(filename, version string) string {
|
|
suffix := ".go"
|
|
if strings.HasSuffix(filename, "_test.go") {
|
|
suffix = "_test.go"
|
|
}
|
|
return fmt.Sprint(filename[:len(filename)-len(suffix)], version, suffix)
|
|
}
|
|
|
|
// WriteVersionedGoFile prepends a standard file comment, adds build tags to
|
|
// version the file for the current Unicode version, and package statement to
|
|
// the given bytes, applies gofmt, and writes them to a file with the given
|
|
// name. It will call log.Fatal if there are any errors.
|
|
func WriteVersionedGoFile(filename, pkg string, b []byte) {
|
|
tags := buildTags()
|
|
if tags != "" {
|
|
filename = insertVersion(filename, UnicodeVersion())
|
|
}
|
|
w, err := os.Create(filename)
|
|
if err != nil {
|
|
log.Fatalf("Could not create file %s: %v", filename, err)
|
|
}
|
|
defer w.Close()
|
|
if _, err = WriteGo(w, pkg, tags, b); err != nil {
|
|
log.Fatalf("Error writing file %s: %v", filename, err)
|
|
}
|
|
}
|
|
|
|
// WriteGo prepends a standard file comment and package statement to the given
|
|
// bytes, applies gofmt, and writes them to w.
|
|
func WriteGo(w io.Writer, pkg, tags string, b []byte) (n int, err error) {
|
|
src := []byte(header)
|
|
if tags != "" {
|
|
src = append(src, fmt.Sprintf("// +build %s\n\n", tags)...)
|
|
}
|
|
src = append(src, fmt.Sprintf("package %s\n\n", pkg)...)
|
|
src = append(src, b...)
|
|
formatted, err := format.Source(src)
|
|
if err != nil {
|
|
// Print the generated code even in case of an error so that the
|
|
// returned error can be meaningfully interpreted.
|
|
n, _ = w.Write(src)
|
|
return n, err
|
|
}
|
|
return w.Write(formatted)
|
|
}
|
|
|
|
// Repackage rewrites a Go file from belonging to package main to belonging to
|
|
// the given package.
|
|
func Repackage(inFile, outFile, pkg string) {
|
|
src, err := ioutil.ReadFile(inFile)
|
|
if err != nil {
|
|
log.Fatalf("reading %s: %v", inFile, err)
|
|
}
|
|
const toDelete = "package main\n\n"
|
|
i := bytes.Index(src, []byte(toDelete))
|
|
if i < 0 {
|
|
log.Fatalf("Could not find %q in %s.", toDelete, inFile)
|
|
}
|
|
w := &bytes.Buffer{}
|
|
w.Write(src[i+len(toDelete):])
|
|
WriteGoFile(outFile, pkg, w.Bytes())
|
|
}
|