mirror of
https://github.com/golang/go
synced 2024-11-18 19:44:46 -07:00
d0542c01b0
In api/*.txt, interface declarations are represented with lines like:
pkg container/heap, type Interface interface { Len, Less, Pop, Push, Swap }
or, when they have no exported methods:
pkg go/ast, type Expr interface, unexported methods
The latter form confuses mkstdlib into thinking that it's a method
because of the extra comma, and then it skips the interface entirely.
Running this program is a matter of seconds once per release, so rather
than trying to fix the optimization, just remove it. The parsing logic
doesn't care about the extra lines.
And the corresponding change to the copy in lsp/testdata/unimported.
Updates golang/go#34199
Change-Id: Ic34b8a47537608401e4ef6683617d797f9f50f8a
Reviewed-on: https://go-review.googlesource.com/c/tools/+/194568
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
129 lines
2.9 KiB
Go
129 lines
2.9 KiB
Go
// +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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"os/exec"
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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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)
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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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mustOpen(api("go1.13.txt")),
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// The API of the syscall/js package needs to be computed explicitly,
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// because it's not included in the GOROOT/api/go1.*.txt files at this time.
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syscallJSAPI(),
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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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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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// syscallJSAPI returns the API of the syscall/js package.
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// It's computed from the contents of $(go env GOROOT)/src/syscall/js.
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func syscallJSAPI() io.Reader {
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var exeSuffix string
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if runtime.GOOS == "windows" {
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exeSuffix = ".exe"
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}
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cmd := exec.Command("go"+exeSuffix, "run", "cmd/api", "-contexts", "js-wasm", "syscall/js")
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out, err := cmd.Output()
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if err != nil {
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log.Fatalln(err)
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}
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return bytes.NewReader(out)
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}
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