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caa95bb40b
Unimported packages may be suggested as completion items. Since these are not yet imported, they should be ranked lower than other candidates. They also require an additional import statement to be valid, which is provided as an AdditionalTextEdit. Adding this import does not use astutil.AddNamedImport, to avoid editing the current ast and work even if there are errors. Additionally, it can be hard to determine what changes need to be made to the source document from the ast, as astutil.AddNamedImport includes a merging pass. Instead, the completion item simply adds another import declaration. Change-Id: Icbde226d843bd49ee3713cafcbd5299d51530695 Reviewed-on: https://go-review.googlesource.com/c/tools/+/190338 Run-TryBot: Suzy Mueller <suzmue@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Rebecca Stambler <rstambler@golang.org>
116 lines
2.6 KiB
Go
116 lines
2.6 KiB
Go
// +build ignore
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// mkunimported generates the unimported.go file, containing the Go standard
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// library packages.
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// The completion items from the std library are computed in the same way as in the
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// golang.org/x/tools/internal/imports.
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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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pkgpath "path"
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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 unimported\n")
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outf("func _() {\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]bool{
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"unsafe": true,
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"syscall/js": true,
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}
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paths := []string{"unsafe", "syscall/js"}
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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, _ := m[1], m[2]
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if _, ok := pkgs[path]; !ok {
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pkgs[path] = true
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paths = append(paths, path)
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}
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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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var markers []string
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for _, path := range paths {
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marker := strings.ReplaceAll(path, "/", "slash")
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markers = append(markers, marker)
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}
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outf(" //@complete(\"\", %s)\n", strings.Join(markers, ", "))
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outf("}\n")
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outf("// Create markers for unimported std lib packages. Only for use by this test.\n")
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for i, path := range paths {
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name := pkgpath.Base(path)
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marker := markers[i]
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outf("/* %s *///@item(%s, \"%s\", \"\\\"%s\\\"\", \"package\")\n", name, marker, name, path)
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}
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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("unimported.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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