113 lines
2.4 KiB
Go
113 lines
2.4 KiB
Go
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// +build ignore
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// mkstdlib generates the zstdlib.go file, containing the Go standard
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// library API symbols. It's baked into the binary to avoid scanning
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// GOPATH in the common case.
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package main
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import (
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"bufio"
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"bytes"
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"fmt"
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"go/format"
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"io"
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"io/ioutil"
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"log"
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"os"
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"path/filepath"
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"regexp"
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"runtime"
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"sort"
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"strings"
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)
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func mustOpen(name string) io.Reader {
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f, err := os.Open(name)
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if err != nil {
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log.Fatal(err)
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}
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return f
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}
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func api(base string) string {
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return filepath.Join(runtime.GOROOT(), "api", base)
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}
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var sym = regexp.MustCompile(`^pkg (\S+).*?, (?:var|func|type|const) ([A-Z]\w*)`)
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var unsafeSyms = map[string]bool{"Alignof": true, "ArbitraryType": true, "Offsetof": true, "Pointer": true, "Sizeof": true}
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func main() {
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var buf bytes.Buffer
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outf := func(format string, args ...interface{}) {
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fmt.Fprintf(&buf, format, args...)
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}
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outf("// Code generated by mkstdlib.go. DO NOT EDIT.\n\n")
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outf("package imports\n")
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outf("var stdlib = map[string]map[string]bool{\n")
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f := io.MultiReader(
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mustOpen(api("go1.txt")),
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mustOpen(api("go1.1.txt")),
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mustOpen(api("go1.2.txt")),
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mustOpen(api("go1.3.txt")),
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mustOpen(api("go1.4.txt")),
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mustOpen(api("go1.5.txt")),
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mustOpen(api("go1.6.txt")),
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mustOpen(api("go1.7.txt")),
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mustOpen(api("go1.8.txt")),
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mustOpen(api("go1.9.txt")),
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mustOpen(api("go1.10.txt")),
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mustOpen(api("go1.11.txt")),
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mustOpen(api("go1.12.txt")),
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)
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sc := bufio.NewScanner(f)
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pkgs := map[string]map[string]bool{
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"unsafe": unsafeSyms,
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}
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paths := []string{"unsafe"}
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for sc.Scan() {
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l := sc.Text()
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has := func(v string) bool { return strings.Contains(l, v) }
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if has("struct, ") || has("interface, ") || has(", method (") {
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continue
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}
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if m := sym.FindStringSubmatch(l); m != nil {
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path, sym := m[1], m[2]
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if _, ok := pkgs[path]; !ok {
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pkgs[path] = map[string]bool{}
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paths = append(paths, path)
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}
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pkgs[path][sym] = true
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}
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}
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if err := sc.Err(); err != nil {
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log.Fatal(err)
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}
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sort.Strings(paths)
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for _, path := range paths {
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outf("\t%q: map[string]bool{\n", path)
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pkg := pkgs[path]
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var syms []string
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for sym := range pkg {
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syms = append(syms, sym)
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}
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sort.Strings(syms)
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for _, sym := range syms {
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outf("\t\t%q: true,\n", sym)
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}
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outf("},\n")
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}
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outf("}\n")
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fmtbuf, err := format.Source(buf.Bytes())
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if err != nil {
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log.Fatal(err)
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}
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err = ioutil.WriteFile("zstdlib.go", fmtbuf, 0666)
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if err != nil {
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log.Fatal(err)
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}
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}
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