add: message only from this file

main.go

@@ -18,9 +18,13 @@
 //	  protodoc [flags]
 //
 //	Flags:
+//	      --directories value                    comma separated map of target directory to parse options (e.g. 'dirA=message,dirB=message_service')
+//	  -d, --directory string                     target directory where Protocol Buffer files are.
 //	  -h, --help                                 help for protodoc
-//	-o, --languages value      language options in field descriptions (default [Go,C++,Java,Python])
-//	-p, --target-path string   file path to save the documentation
+//	  -l, --languages value                      language options in field descriptions (Go, C++, Java, Python, Ruby, C#) (default [])
+//	      --message-only-from-this-file string   if specified, it parses only the messages in this file within the directory
+//	  -o, --output string                        output file path to save documentation
+//	  -p, --parse value                          Protocol Buffer types to parse (message, service) (default [service,message])
 //	  -t, --title string                         title of documentation
 //
 package main
@@ -49,6 +53,7 @@ var (
 	outputPath      string
 
 	targetDirectories       mapString
+	messageOnlyFromThisFile string
 )
 
 type mapString map[string][]parse.ParseOption
@@ -94,13 +99,14 @@ func init() {
 	rootCommand.PersistentFlags().StringVarP(&outputPath, "output", "o", "", "output file path to save documentation")
 
 	rootCommand.PersistentFlags().Var(&targetDirectories, "directories", "comma separated map of target directory to parse options (e.g. 'dirA=message,dirB=message_service')")
+	rootCommand.PersistentFlags().StringVar(&messageOnlyFromThisFile, "message-only-from-this-file", "", "if specified, it parses only the messages in this file within the directory")
 }
 
 func CommandFunc(cmd *cobra.Command, args []string) error {
 	var rs string
 	if len(targetDirectories) == 0 {
 		log.Println("opening", targetDirectory)
-		proto, err := parse.ReadDir(targetDirectory)
+		proto, err := parse.ReadDir(targetDirectory, "")
 		if err != nil {
 			return err
 		}
@@ -121,7 +127,7 @@ func CommandFunc(cmd *cobra.Command, args []string) error {
 	} else {
 		for k, opts := range targetDirectories {
 			log.Println("opening", k)
-			proto, err := parse.ReadDir(k)
+			proto, err := parse.ReadDir(k, messageOnlyFromThisFile)
 			if err != nil {
 				return err
 			}

parse/markdown_test.go

@@ -17,7 +17,7 @@ package parse
 import "testing"
 
 func TestMarkdown(t *testing.T) {
-	proto, err := ReadDir("testdata")
+	proto, err := ReadDir("testdata", "")
 	if err != nil {
 		t.Fatal(err)
 	}

parse/parse.go

@@ -62,33 +62,47 @@ const (
 	parsingRPC
 )
 
-func ReadDir(targetDir string) (*Proto, error) {
+func ReadDir(targetDir, messageOnlyFromThisFile string) (*Proto, error) {
 	rm, err := walkDirExt(targetDir, ".proto")
 	if err != nil {
 		return nil, err
 	}
 
-	var lines []string
+	pr := &Proto{
+		Services: []ProtoService{},
+		Messages: []ProtoMessage{},
+	}
 	for _, fpath := range rm {
+		p, err := ReadFile(fpath)
+		if err != nil {
+			return nil, err
+		}
+		pr.Services = append(pr.Services, p.Services...)
+		if messageOnlyFromThisFile == "" ||
+			(messageOnlyFromThisFile != "" && strings.HasSuffix(fpath, messageOnlyFromThisFile)) {
+			pr.Messages = append(pr.Messages, p.Messages...)
+		}
+	}
+	return pr, nil
+}
+
+func ReadFile(fpath string) (*Proto, error) {
 	f, err := os.OpenFile(fpath, os.O_RDONLY, 0444)
 	if err != nil {
 		return nil, err
 	}
 
-		ls, err := readLines(f)
+	lines, err := readLines(f)
 	if err != nil {
 		f.Close()
 		return nil, err
 	}
-		lines = append(lines, ls...)
-
 	f.Close()
-	}
 
 	var (
 		rp = Proto{
-			Messages: []ProtoMessage{},
 			Services: []ProtoService{},
+			Messages: []ProtoMessage{},
 		}
 		mode = reading
 

parse/parse_test.go

@@ -17,7 +17,7 @@ package parse
 import "testing"
 
 func TestReadDir(t *testing.T) {
-	proto, err := ReadDir("testdata")
+	proto, err := ReadDir("testdata", "")
 	if err != nil {
 		t.Fatal(err)
 	}

parse/proto.go

@@ -18,25 +18,41 @@ import "sort"
 
 // Proto represents sets of 'ProtoMessage' and 'ProtoService'.
 type Proto struct {
-	Messages []ProtoMessage
 	Services []ProtoService
+	Messages []ProtoMessage
 }
 
-type messages []ProtoMessage
-
-func (s messages) Len() int           { return len(s) }
-func (s messages) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
-func (s messages) Less(i, j int) bool { return s[i].Name < s[j].Name }
-
 type services []ProtoService
 
 func (s services) Len() int           { return len(s) }
 func (s services) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
 func (s services) Less(i, j int) bool { return s[i].Name < s[j].Name }
 
+type messages []ProtoMessage
+
+func (s messages) Len() int           { return len(s) }
+func (s messages) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
+func (s messages) Less(i, j int) bool { return s[i].Name < s[j].Name }
+
 func (p *Proto) Sort() {
-	sort.Sort(messages(p.Messages))
 	sort.Sort(services(p.Services))
+	sort.Sort(messages(p.Messages))
+}
+
+// ProtoService represents the 'service' type in Protocol Buffer.
+// (https://developers.google.com/protocol-buffers/docs/proto3#services)
+type ProtoService struct {
+	Name        string
+	Description string
+	Methods     []ProtoMethod
+}
+
+// ProtoMethod represents methods in ProtoService.
+type ProtoMethod struct {
+	Name         string
+	Description  string
+	RequestType  string
+	ResponseType string
 }
 
 // ProtoMessage represents the 'message' type in Protocol Buffer.
@@ -55,19 +71,3 @@ type ProtoField struct {
 	ProtoType            ProtoType
 	UserDefinedProtoType string
 }
-
-// ProtoService represents the 'service' type in Protocol Buffer.
-// (https://developers.google.com/protocol-buffers/docs/proto3#services)
-type ProtoService struct {
-	Name        string
-	Description string
-	Methods     []ProtoMethod
-}
-
-// ProtoMethod represents methods in ProtoService.
-type ProtoMethod struct {
-	Name         string
-	Description  string
-	RequestType  string
-	ResponseType string
-}