tartrazine/cmd/enry/main.go

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package main
import (
"bufio"
"bytes"
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"encoding/json"
"flag"
"fmt"
"io/ioutil"
"log"
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"os"
"path/filepath"
"sort"
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"strings"
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"gopkg.in/src-d/enry.v1"
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"gopkg.in/src-d/enry.v1/data"
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)
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var (
version = "undefined"
build = "undefined"
commit = "undefined"
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)
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func main() {
flag.Usage = usage
breakdownFlag := flag.Bool("breakdown", false, "")
jsonFlag := flag.Bool("json", false, "")
showVersion := flag.Bool("version", false, "Show the enry version information")
onlyProg := flag.Bool("prog", false, "Only show programming file types in output")
countMode := flag.String("mode", "file", "the method used to count file size. Available options are: file, line and byte")
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flag.Parse()
if *showVersion {
fmt.Println(version)
return
}
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root, err := filepath.Abs(flag.Arg(0))
if err != nil {
log.Fatal(err)
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}
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fileInfo, err := os.Stat(root)
if err != nil {
log.Fatal(err)
}
if fileInfo.Mode().IsRegular() {
err = printFileAnalysis(root)
if err != nil {
fmt.Println(err)
}
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return
}
out := make(map[string][]string, 0)
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err = filepath.Walk(root, func(path string, f os.FileInfo, err error) error {
if err != nil {
log.Println(err)
return filepath.SkipDir
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}
if !f.Mode().IsDir() && !f.Mode().IsRegular() {
return nil
}
relativePath, err := filepath.Rel(root, path)
if err != nil {
log.Println(err)
return nil
}
if relativePath == "." {
return nil
}
if f.IsDir() {
relativePath = relativePath + "/"
}
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if enry.IsVendor(relativePath) || enry.IsDotFile(relativePath) ||
enry.IsDocumentation(relativePath) || enry.IsConfiguration(relativePath) {
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if f.IsDir() {
return filepath.SkipDir
}
return nil
}
if f.IsDir() {
return nil
}
language, ok := enry.GetLanguageByExtension(path)
if !ok {
if language, ok = enry.GetLanguageByFilename(path); !ok {
content, err := ioutil.ReadFile(path)
if err != nil {
log.Println(err)
return nil
}
language = enry.GetLanguage(filepath.Base(path), content)
if language == enry.OtherLanguage {
return nil
}
}
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}
// If we are displaying only prog. and language is not prog. skip it.
if *onlyProg && enry.GetLanguageType(language) != enry.Programming {
return nil
}
out[language] = append(out[language], relativePath)
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return nil
})
if err != nil {
log.Fatal(err)
}
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var buff bytes.Buffer
switch {
case *jsonFlag && !*breakdownFlag:
printJson(out, &buff)
case *jsonFlag && *breakdownFlag:
printBreakDown(out, &buff)
case *breakdownFlag:
printPercents(out, &buff, *countMode)
buff.WriteByte('\n')
printBreakDown(out, &buff)
default:
printPercents(out, &buff, *countMode)
}
fmt.Print(buff.String())
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}
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func usage() {
fmt.Fprintf(
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os.Stderr,
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` %[1]s %[2]s build: %[3]s commit: %[4]s, based on linguist commit: %[5]s
%[1]s, A simple (and faster) implementation of github/linguist
usage: %[1]s [-mode=(file|line|byte)] [-prog] <path>
%[1]s [-mode=(file|line|byte)] [-prog] [-json] [-breakdown] <path>
%[1]s [-mode=(file|line|byte)] [-prog] [-json] [-breakdown]
%[1]s [-version]
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`,
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os.Args[0], version, build, commit, data.LinguistCommit[:7],
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)
}
func printBreakDown(out map[string][]string, buff *bytes.Buffer) {
for name, language := range out {
writeStringLn(name, buff)
for _, file := range language {
writeStringLn(file, buff)
}
writeStringLn("", buff)
}
}
func printJson(out map[string][]string, buff *bytes.Buffer) {
data, _ := json.Marshal(out)
buff.Write(data)
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buff.WriteByte('\n')
}
// filelistError represents a failed operation that took place across multiple files.
type filelistError []string
func (e filelistError) Error() string {
return fmt.Sprintf("Could not process the following files:\n%s", strings.Join(e, "\n"))
}
func printPercents(fSummary map[string][]string, buff *bytes.Buffer, mode string) {
// Select the way we quantify 'amount' of code.
var reducer func([]string) (float64, filelistError)
switch mode {
case "file":
reducer = fileCountValues
case "line":
reducer = lineCountValues
case "byte":
reducer = byteCountValues
default:
reducer = fileCountValues
}
// Reduce the list of files to a quantity of file type.
var total float64
fileValues := make(map[string]float64)
keys := []string{}
var unreadableFiles filelistError
for fType, files := range fSummary {
val, err := reducer(files)
if err != nil {
unreadableFiles = append(unreadableFiles, err...)
}
fileValues[fType] = val
keys = append(keys, fType)
total += val
}
// Slice the keys by their quantity (file count, line count, byte size, etc.).
sort.Slice(keys, func(i, j int) bool {
return fileValues[keys[i]] > fileValues[keys[j]]
})
// Calculate and write percentages of each file type.
for _, fType := range keys {
val := fileValues[fType]
percent := val / total * 100.0
buff.WriteString(fmt.Sprintf("%.2f%%\t%s\n", percent, fType))
if unreadableFiles != nil {
buff.WriteString(fmt.Sprintf("\n%s", unreadableFiles.Error()))
}
}
}
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func fileCountValues(files []string) (float64, filelistError) {
return float64(len(files)), nil
}
func lineCountValues(files []string) (float64, filelistError) {
var filesErr filelistError
var t float64
for _, fName := range files {
content, err := ioutil.ReadFile(fName)
if err != nil {
filesErr = append(filesErr, fName)
continue
}
l, _ := getLines(content)
t += float64(l)
}
return t, filesErr
}
func byteCountValues(files []string) (float64, filelistError) {
var filesErr filelistError
var t float64
for _, fName := range files {
f, err := os.Open(fName)
if err != nil {
filesErr = append(filesErr, fName)
continue
}
fi, err := f.Stat()
f.Close()
if err != nil {
filesErr = append(filesErr, fName)
continue
}
t += float64(fi.Size())
}
return t, filesErr
}
func printFileAnalysis(fName string) error {
content, err := ioutil.ReadFile(fName)
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if err != nil {
return err
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}
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totalLines, nonBlank := getLines(content)
fileType := getFileType(fName, content)
language := enry.GetLanguage(fName, content)
mimeType := enry.GetMimeType(fName, language)
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fmt.Printf(
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`%s: %d lines (%d sloc)
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type: %s
mime_type: %s
language: %s
`,
filepath.Base(fName), totalLines, nonBlank, fileType, mimeType, language,
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)
return nil
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}
func getLines(b []byte) (total int, nonBlank int) {
scanner := bufio.NewScanner(bytes.NewReader(b))
lineCt := 0
blankCt := 0
for scanner.Scan() {
lineCt++
line := bytes.TrimSpace(scanner.Bytes())
if len(line) == 0 {
blankCt++
}
}
// Scanner doesn't catch the case of last byte newline.
if len(b) > 0 && b[len(b)-1] == '\n' {
lineCt++
blankCt++
}
return lineCt, lineCt - blankCt
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}
func getFileType(file string, content []byte) string {
switch {
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case enry.IsImage(file):
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return "Image"
case enry.IsBinary(content):
return "Binary"
default:
return "Text"
}
}
func writeStringLn(s string, buff *bytes.Buffer) {
buff.WriteString(s)
buff.WriteByte('\n')
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}