/
main.go
186 lines (168 loc) · 4.59 KB
/
main.go
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package main
import (
"strings"
"unicode"
"github.com/gogo/protobuf/gogoproto"
"github.com/gogo/protobuf/proto"
gogo "github.com/gogo/protobuf/protoc-gen-gogo/descriptor"
"github.com/gogo/protobuf/vanity"
"github.com/gogo/protobuf/vanity/command"
"github.com/serenize/snaker"
)
func main() {
req := command.Read()
files := req.GetProtoFile()
// Forced (to prevent mistake)
vanity.ForEachFile(files, vanity.TurnOffGogoImport)
// Default stuffs.
vanity.ForEachFile(files, vanity.TurnOnSizerAll) // 'Marshal' needs this.
vanity.ForEachFile(files, vanity.TurnOnUnmarshalerAll)
vanity.ForEachFile(files, vanity.TurnOnMarshalerAll)
// Apply custom fixes.
vanity.ForEachFieldInFilesExcludingExtensions(files, fixFieldName)
// vanity.ForEachFieldInFilesExcludingExtensions(files, fixNumericJSONTag)
resp := command.Generate(req)
command.Write(resp)
}
// fixFieldName changes field names like
// 'id' -> 'ID'
func fixFieldName(field *gogo.FieldDescriptorProto) {
if gogoproto.IsCustomName(field) {
return // Skip if a custom name is specified.
}
if field.Options == nil {
field.Options = new(gogo.FieldOptions)
}
name := field.GetName()
name = snaker.SnakeToCamel(name)
name = lintName(name)
// Use gogoproto.customname
proto.SetExtension(field.Options, gogoproto.E_Customname, &name)
}
//TODO(jerrodrurik):
// func fixNumericJSONTag(field *gogo.FieldDescriptorProto) {
// if gogoproto.GetJsonTag(field) != nil {
// return // Skip if a custom jsontag is specified.
// }
//
// switch field.GetType() {
// // https://godoc.org/github.com/golang/protobuf/jsonpb says
// // jsonpb "encodes int64, uint64 as strings"
// case gogo.FieldDescriptorProto_TYPE_INT64, gogo.FieldDescriptorProto_TYPE_UINT64:
//
// default: // Not applicable.
// return
// }
//
// if field.Options == nil {
// field.Options = new(gogo.FieldOptions)
// }
//
// jsonTag := *field.Name + ",string" + ",omitempty"
// proto.SetExtension(field.Options, gogoproto.E_Jsontag, &jsonTag)
// }
// See: https://github.com/golang/lint/blob/master/lint.go
// commonInitialisms is a set of common initialisms.
// Only add entries that are highly unlikely to be non-initialisms.
// For instance, "ID" is fine (Freudian code is rare), but "AND" is not.
var commonInitialisms = map[string]bool{
"API": true,
"ASCII": true,
"CPU": true,
"CSS": true,
"DNS": true,
"EOF": true,
"GUID": true,
"HTML": true,
"HTTP": true,
"HTTPS": true,
"ID": true,
"IP": true,
"JSON": true,
"LHS": true,
"QPS": true,
"RAM": true,
"RHS": true,
"RPC": true,
"SLA": true,
"SMTP": true,
"SQL": true,
"SSH": true,
"TCP": true,
"TLS": true,
"TTL": true,
"UDP": true,
"UI": true,
"UID": true,
"UUID": true,
"URI": true,
"URL": true,
"UTF8": true,
"VM": true,
"XML": true,
"XSRF": true,
"XSS": true,
}
// lintName returns a different name if it should be different.
func lintName(name string) (should string) {
// Fast path for simple cases: "_" and all lowercase.
if name == "_" {
return name
}
allLower := true
for _, r := range name {
if !unicode.IsLower(r) {
allLower = false
break
}
}
if allLower {
return name
}
// Split camelCase at any lower->upper transition, and split on underscores.
// Check each word for common initialisms.
runes := []rune(name)
w, i := 0, 0 // index of start of word, scan
for i+1 <= len(runes) {
eow := false // whether we hit the end of a word
if i+1 == len(runes) {
eow = true
} else if runes[i+1] == '_' {
// underscore; shift the remainder forward over any run of underscores
eow = true
n := 1
for i+n+1 < len(runes) && runes[i+n+1] == '_' {
n++
}
// Leave at most one underscore if the underscore is between two digits
if i+n+1 < len(runes) && unicode.IsDigit(runes[i]) && unicode.IsDigit(runes[i+n+1]) {
n--
}
copy(runes[i+1:], runes[i+n+1:])
runes = runes[:len(runes)-n]
} else if unicode.IsLower(runes[i]) && !unicode.IsLower(runes[i+1]) {
// lower->non-lower
eow = true
}
i++
if !eow {
continue
}
// [w,i) is a word.
word := string(runes[w:i])
if u := strings.ToUpper(word); commonInitialisms[u] {
// Keep consistent case, which is lowercase only at the start.
if w == 0 && unicode.IsLower(runes[w]) {
u = strings.ToLower(u)
}
// All the common initialisms are ASCII,
// so we can replace the bytes exactly.
copy(runes[w:], []rune(u))
} else if w > 0 && strings.ToLower(word) == word {
// already all lowercase, and not the first word, so uppercase the first character.
runes[w] = unicode.ToUpper(runes[w])
}
w = i
}
return string(runes)
}