.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.1.0/internal/imports/mkstdlib.go

   1 // Copyright 2019 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 // +build ignore
   6
   7 // mkstdlib generates the zstdlib.go file, containing the Go standard
   8 // library API symbols. It's baked into the binary to avoid scanning
   9 // GOPATH in the common case.
  10 package main
  11
  12 import (
  13         "bufio"
  14         "bytes"
  15         "fmt"
  16         "go/format"
  17         exec "golang.org/x/sys/execabs"
  18         "io"
  19         "io/ioutil"
  20         "log"
  21         "os"
  22         "path/filepath"
  23         "regexp"
  24         "runtime"
  25         "sort"
  26 )
  27
  28 func mustOpen(name string) io.Reader {
  29         f, err := os.Open(name)
  30         if err != nil {
  31                 log.Fatal(err)
  32         }
  33         return f
  34 }
  35
  36 func api(base string) string {
  37         return filepath.Join(runtime.GOROOT(), "api", base)
  38 }
  39
  40 var sym = regexp.MustCompile(`^pkg (\S+).*?, (?:var|func|type|const) ([A-Z]\w*)`)
  41
  42 var unsafeSyms = map[string]bool{"Alignof": true, "ArbitraryType": true, "Offsetof": true, "Pointer": true, "Sizeof": true}
  43
  44 func main() {
  45         var buf bytes.Buffer
  46         outf := func(format string, args ...interface{}) {
  47                 fmt.Fprintf(&buf, format, args...)
  48         }
  49         outf("// Code generated by mkstdlib.go. DO NOT EDIT.\n\n")
  50         outf("package imports\n")
  51         outf("var stdlib = map[string][]string{\n")
  52         f := io.MultiReader(
  53                 mustOpen(api("go1.txt")),
  54                 mustOpen(api("go1.1.txt")),
  55                 mustOpen(api("go1.2.txt")),
  56                 mustOpen(api("go1.3.txt")),
  57                 mustOpen(api("go1.4.txt")),
  58                 mustOpen(api("go1.5.txt")),
  59                 mustOpen(api("go1.6.txt")),
  60                 mustOpen(api("go1.7.txt")),
  61                 mustOpen(api("go1.8.txt")),
  62                 mustOpen(api("go1.9.txt")),
  63                 mustOpen(api("go1.10.txt")),
  64                 mustOpen(api("go1.11.txt")),
  65                 mustOpen(api("go1.12.txt")),
  66                 mustOpen(api("go1.13.txt")),
  67                 mustOpen(api("go1.14.txt")),
  68                 mustOpen(api("go1.15.txt")),
  69
  70                 // The API of the syscall/js package needs to be computed explicitly,
  71                 // because it's not included in the GOROOT/api/go1.*.txt files at this time.
  72                 syscallJSAPI(),
  73         )
  74         sc := bufio.NewScanner(f)
  75
  76         pkgs := map[string]map[string]bool{
  77                 "unsafe": unsafeSyms,
  78         }
  79         paths := []string{"unsafe"}
  80
  81         for sc.Scan() {
  82                 l := sc.Text()
  83                 if m := sym.FindStringSubmatch(l); m != nil {
  84                         path, sym := m[1], m[2]
  85
  86                         if _, ok := pkgs[path]; !ok {
  87                                 pkgs[path] = map[string]bool{}
  88                                 paths = append(paths, path)
  89                         }
  90                         pkgs[path][sym] = true
  91                 }
  92         }
  93         if err := sc.Err(); err != nil {
  94                 log.Fatal(err)
  95         }
  96         sort.Strings(paths)
  97         for _, path := range paths {
  98                 outf("\t%q: []string{\n", path)
  99                 pkg := pkgs[path]
 100                 var syms []string
 101                 for sym := range pkg {
 102                         syms = append(syms, sym)
 103                 }
 104                 sort.Strings(syms)
 105                 for _, sym := range syms {
 106                         outf("\t\t%q,\n", sym)
 107                 }
 108                 outf("},\n")
 109         }
 110         outf("}\n")
 111         fmtbuf, err := format.Source(buf.Bytes())
 112         if err != nil {
 113                 log.Fatal(err)
 114         }
 115         err = ioutil.WriteFile("zstdlib.go", fmtbuf, 0666)
 116         if err != nil {
 117                 log.Fatal(err)
 118         }
 119 }
 120
 121 // syscallJSAPI returns the API of the syscall/js package.
 122 // It's computed from the contents of $(go env GOROOT)/src/syscall/js.
 123 func syscallJSAPI() io.Reader {
 124         var exeSuffix string
 125         if runtime.GOOS == "windows" {
 126                 exeSuffix = ".exe"
 127         }
 128         cmd := exec.Command("go"+exeSuffix, "run", "cmd/api", "-contexts", "js-wasm", "syscall/js")
 129         out, err := cmd.Output()
 130         if err != nil {
 131                 log.Fatalln(err)
 132         }
 133         return bytes.NewReader(out)
 134 }