mirror of
https://github.com/golang/go
synced 2024-11-18 15:34:53 -07:00
c02c21e5e9
We intend to use the GOPATH resolver's results during LSP autocompletion. That means we have to be able to cache its data, same as we do for modules. Convert it to use a dirInfoCache. Cache exports in the dirInfoCache. Along the way, store exports as slices rather than maps. We don't need the extra structure the vast majority of the time, and the memory overhead is nontrivial. Change-Id: If267d6b00da2163a960b93b2cf2088ec2538f73d Reviewed-on: https://go-review.googlesource.com/c/tools/+/205162 Run-TryBot: Heschi Kreinick <heschi@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Rebecca Stambler <rstambler@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][]string{\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: []string{\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,\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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