impl: sort option

cmd/gocloc/main.go

@@ -5,7 +5,6 @@ import (
 	"fmt"
 	"os"
 	"regexp"
-	"sort"
 	"strings"
 
 	"github.com/hhatto/gocloc"
@@ -43,7 +42,7 @@ var rowLen = 79
 // It is necessary to use notation that follows go-flags.
 type CmdOptions struct {
 	Byfile         bool   `long:"by-file" description:"report results for every encountered source file"`
-	SortTag        string `long:"sort" default:"code" description:"sort based on a certain column"`
+	SortTag        string `long:"sort" default:"code" description:"sort based on a certain column" choice:"name" choice:"files" choice:"blank" choice:"comment" choice:"code"`
 	OutputType     string `long:"output-type" default:"default" description:"output type [values: default,cloc-xml,sloccount,json]"`
 	ExcludeExt     string `long:"exclude-ext" description:"exclude file name extensions (separated commas)"`
 	IncludeLang    string `long:"include-lang" description:"include language name (separated commas)"`
@@ -103,7 +102,7 @@ func (o *outputBuilder) WriteFooter() {
 	}
 }
 
-func writeResultWithByFile(outputType string, result *gocloc.Result) {
+func writeResultWithByFile(opts *CmdOptions, result *gocloc.Result) {
 	clocFiles := result.Files
 	total := result.Total
 	maxPathLen := result.MaxPathLength
@@ -112,9 +111,18 @@ func writeResultWithByFile(outputType string, result *gocloc.Result) {
 	for _, file := range clocFiles {
 		sortedFiles = append(sortedFiles, *file)
 	}
-	sort.Sort(sortedFiles)
+	switch opts.SortTag {
+	case "name":
+		sortedFiles.SortByName()
+	case "comment":
+		sortedFiles.SortByComments()
+	case "blank":
+		sortedFiles.SortByBlanks()
+	default:
+		sortedFiles.SortByCode()
+	}
 
-	switch outputType {
+	switch opts.OutputType {
 	case OutputTypeClocXML:
 		t := gocloc.XMLTotalFiles{
 			Code:    total.Code,
@@ -166,15 +174,26 @@ func (o *outputBuilder) WriteResult() {
 	total := o.result.Total
 
 	if o.opts.Byfile {
-		writeResultWithByFile(o.opts.OutputType, o.result)
+		writeResultWithByFile(o.opts, o.result)
 	} else {
 		var sortedLanguages gocloc.Languages
 		for _, language := range clocLangs {
 			if len(language.Files) != 0 {
 				sortedLanguages = append(sortedLanguages, *language)
 			}
 		}
-		sort.Sort(sortedLanguages)
+		switch o.opts.SortTag {
+		case "name":
+			sortedLanguages.SortByName()
+		case "files":
+			sortedLanguages.SortByFiles()
+		case "comment":
+			sortedLanguages.SortByComments()
+		case "blank":
+			sortedLanguages.SortByBlanks()
+		default:
+			sortedLanguages.SortByCode()
+		}
 
 		switch o.opts.OutputType {
 		case OutputTypeClocXML:
@@ -231,6 +250,12 @@ func main() {
 		return
 	}
 
+	// check sort tag option with other options
+	if opts.Byfile && opts.SortTag == "files" {
+		fmt.Println("`--sort files` option cannot be used in conjunction with the `--by-file` option")
+		os.Exit(1)
+	}
+
 	// setup option for exclude extensions
 	for _, ext := range strings.Split(opts.ExcludeExt, ",") {
 		e, ok := gocloc.Exts[ext]

file.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"io"
 	"os"
+	"sort"
 	"strings"
 	"unicode"
 )
@@ -21,17 +22,38 @@ type ClocFile struct {
 // ClocFiles is gocloc result set.
 type ClocFiles []ClocFile
 
-func (cf ClocFiles) Len() int {
-	return len(cf)
+func (cf ClocFiles) SortByName() {
+	sortFunc := func(i, j int) bool {
+		return cf[i].Name < cf[j].Name
+	}
+	sort.Slice(cf, sortFunc)
 }
-func (cf ClocFiles) Swap(i, j int) {
-	cf[i], cf[j] = cf[j], cf[i]
+
+func (cf ClocFiles) SortByComments() {
+	sortFunc := func(i, j int) bool {
+		if cf[i].Comments == cf[j].Comments {
+			return cf[i].Code > cf[j].Code
+		}
+		return cf[i].Comments > cf[j].Comments
+	}
+	sort.Slice(cf, sortFunc)
 }
-func (cf ClocFiles) Less(i, j int) bool {
-	if cf[i].Code == cf[j].Code {
-		return cf[i].Name < cf[j].Name
+
+func (cf ClocFiles) SortByBlanks() {
+	sortFunc := func(i, j int) bool {
+		if cf[i].Blanks == cf[j].Blanks {
+			return cf[i].Code > cf[j].Code
+		}
+		return cf[i].Blanks > cf[j].Blanks
+	}
+	sort.Slice(cf, sortFunc)
+}
+
+func (cf ClocFiles) SortByCode() {
+	sortFunc := func(i, j int) bool {
+		return cf[i].Code > cf[j].Code
 	}
-	return cf[i].Code > cf[j].Code
+	sort.Slice(cf, sortFunc)
 }
 
 // AnalyzeFile is analyzing file, this function calls AnalyzeReader() inside.

language.go

@@ -38,17 +38,48 @@ type Language struct {
 // Languages is an array representation of Language.
 type Languages []Language
 
-func (ls Languages) Len() int {
-	return len(ls)
+func (ls Languages) SortByName() {
+	sortFunc := func(i, j int) bool {
+		return ls[i].Name < ls[j].Name
+	}
+	sort.Slice(ls, sortFunc)
 }
-func (ls Languages) Swap(i, j int) {
-	ls[i], ls[j] = ls[j], ls[i]
+
+func (ls Languages) SortByFiles() {
+	sortFunc := func(i, j int) bool {
+		if len(ls[i].Files) == len(ls[j].Files) {
+			return ls[i].Code > ls[j].Code
+		}
+		return len(ls[i].Files) > len(ls[j].Files)
+	}
+	sort.Slice(ls, sortFunc)
 }
-func (ls Languages) Less(i, j int) bool {
-	if ls[i].Code == ls[j].Code {
-		return ls[i].Name < ls[j].Name
+
+func (ls Languages) SortByComments() {
+	sortFunc := func(i, j int) bool {
+		if ls[i].Comments == ls[j].Comments {
+			return ls[i].Code > ls[j].Code
+		}
+		return ls[i].Comments > ls[j].Comments
+	}
+	sort.Slice(ls, sortFunc)
+}
+
+func (ls Languages) SortByBlanks() {
+	sortFunc := func(i, j int) bool {
+		if ls[i].Blanks == ls[j].Blanks {
+			return ls[i].Code > ls[j].Code
+		}
+		return ls[i].Blanks > ls[j].Blanks
+	}
+	sort.Slice(ls, sortFunc)
+}
+
+func (ls Languages) SortByCode() {
+	sortFunc := func(i, j int) bool {
+		return ls[i].Code > ls[j].Code
 	}
-	return ls[i].Code > ls[j].Code
+	sort.Slice(ls, sortFunc)
 }
 
 var reShebangEnv = regexp.MustCompile(`^#! *(\S+/env) ([a-zA-Z]+)`)