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author | Michael Muré <batolettre@gmail.com> | 2018-08-14 14:48:41 +0200 |
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committer | Michael Muré <batolettre@gmail.com> | 2018-08-14 14:48:41 +0200 |
commit | 5c568a362b73cf163b06bc7371982f9a7ceaaf29 (patch) | |
tree | 755b61f969913b5290f3d56f4cfba4070b8155bc /vendor/golang.org/x/tools/imports/mkstdlib.go | |
parent | ef0d8fa108fbdef24997a84a3c6ecbf21cbc0a9e (diff) | |
download | git-bug-5c568a362b73cf163b06bc7371982f9a7ceaaf29.tar.gz |
gqlgen: add a small program to go:generate the code
Diffstat (limited to 'vendor/golang.org/x/tools/imports/mkstdlib.go')
-rw-r--r-- | vendor/golang.org/x/tools/imports/mkstdlib.go | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/vendor/golang.org/x/tools/imports/mkstdlib.go b/vendor/golang.org/x/tools/imports/mkstdlib.go new file mode 100644 index 00000000..02e4727e --- /dev/null +++ b/vendor/golang.org/x/tools/imports/mkstdlib.go @@ -0,0 +1,107 @@ +// +build ignore + +// mkstdlib generates the zstdlib.go file, containing the Go standard +// library API symbols. It's baked into the binary to avoid scanning +// GOPATH in the common case. +package main + +import ( + "bufio" + "bytes" + "fmt" + "go/format" + "io" + "io/ioutil" + "log" + "os" + "path" + "path/filepath" + "regexp" + "runtime" + "sort" + "strings" +) + +func mustOpen(name string) io.Reader { + f, err := os.Open(name) + if err != nil { + log.Fatal(err) + } + return f +} + +func api(base string) string { + return filepath.Join(runtime.GOROOT(), "api", base) +} + +var sym = regexp.MustCompile(`^pkg (\S+).*?, (?:var|func|type|const) ([A-Z]\w*)`) + +func main() { + var buf bytes.Buffer + outf := func(format string, args ...interface{}) { + fmt.Fprintf(&buf, format, args...) + } + outf("// Code generated by mkstdlib.go. DO NOT EDIT.\n\n") + outf("package imports\n") + outf("var stdlib = map[string]string{\n") + f := io.MultiReader( + mustOpen(api("go1.txt")), + mustOpen(api("go1.1.txt")), + mustOpen(api("go1.2.txt")), + mustOpen(api("go1.3.txt")), + mustOpen(api("go1.4.txt")), + mustOpen(api("go1.5.txt")), + mustOpen(api("go1.6.txt")), + mustOpen(api("go1.7.txt")), + mustOpen(api("go1.8.txt")), + mustOpen(api("go1.9.txt")), + mustOpen(api("go1.10.txt")), + ) + sc := bufio.NewScanner(f) + fullImport := map[string]string{} // "zip.NewReader" => "archive/zip" + ambiguous := map[string]bool{} + var keys []string + for sc.Scan() { + l := sc.Text() + has := func(v string) bool { return strings.Contains(l, v) } + if has("struct, ") || has("interface, ") || has(", method (") { + continue + } + if m := sym.FindStringSubmatch(l); m != nil { + full := m[1] + key := path.Base(full) + "." + m[2] + if exist, ok := fullImport[key]; ok { + if exist != full { + ambiguous[key] = true + } + } else { + fullImport[key] = full + keys = append(keys, key) + } + } + } + if err := sc.Err(); err != nil { + log.Fatal(err) + } + sort.Strings(keys) + for _, key := range keys { + if ambiguous[key] { + outf("\t// %q is ambiguous\n", key) + } else { + outf("\t%q: %q,\n", key, fullImport[key]) + } + } + outf("\n") + for _, sym := range [...]string{"Alignof", "ArbitraryType", "Offsetof", "Pointer", "Sizeof"} { + outf("\t%q: %q,\n", "unsafe."+sym, "unsafe") + } + outf("}\n") + fmtbuf, err := format.Source(buf.Bytes()) + if err != nil { + log.Fatal(err) + } + err = ioutil.WriteFile("zstdlib.go", fmtbuf, 0666) + if err != nil { + log.Fatal(err) + } +} |