inital push after work

.gitignore

@@ -0,0 +1 @@
+*.java

go.mod

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+module go-linux-tools/go-ls
+
+go 1.20
+
+require github.com/fatih/color v1.15.0
+
+require (
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.17 // indirect
+	golang.org/x/sys v0.6.0 // indirect
+)

go.sum

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+github.com/fatih/color v1.15.0 h1:kOqh6YHBtK8aywxGerMG2Eq3H6Qgoqeo13Bk2Mv/nBs=
+github.com/fatih/color v1.15.0/go.mod h1:0h5ZqXfHYED7Bhv2ZJamyIOUej9KtShiJESRwBDUSsw=
+github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
+github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
+github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
+github.com/mattn/go-isatty v0.0.17 h1:BTarxUcIeDqL27Mc+vyvdWYSL28zpIhv3RoTdsLMPng=
+github.com/mattn/go-isatty v0.0.17/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
+golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.6.0 h1:MVltZSvRTcU2ljQOhs94SXPftV6DCNnZViHeQps87pQ=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=

main.go

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+package main
+
+import (
+	"flag"
+	"fmt"
+	"io/fs"
+	"os"
+	"strconv"
+
+	"github.com/fatih/color"
+)
+
+func usage() {
+	fmt.Fprintf(os.Stderr, "Usage:\n")
+	os.Exit(1)
+}
+
+func formatFileSize(fi fs.FileInfo) (size string) {
+	switch fileSizeFloat := float64(fi.Size()); {
+
+	case fileSizeFloat > (1024 * 1024 * 1024): //GB
+		fileSizeFloat /= (1024 * 1024 * 1024)
+		size = strconv.FormatFloat(fileSizeFloat, 'f', 1, 64)
+		return size + "G"
+
+	case fileSizeFloat > (1024 * 1024): //MB
+		fileSizeFloat /= (1024 * 1024)
+		size = strconv.FormatFloat(fileSizeFloat, 'f', 1, 64)
+		return size + "M"
+
+	case fileSizeFloat > 1024: //KB
+		fileSizeFloat /= 1024
+		size = strconv.FormatFloat(fileSizeFloat, 'f', 1, 64)
+		return size + "K"
+
+	case fileSizeFloat > 0: //B
+		size = strconv.FormatFloat(fileSizeFloat, 'f', 0, 64)
+		return size
+
+	default:
+		return "0"
+	}
+}
+
+func getFileMod(fi fs.FileInfo) (mod string) {
+	//day month short time HH:MM
+	day := strconv.Itoa(fi.ModTime().Day())
+	month := fi.ModTime().Month().String()
+	timeH := strconv.Itoa(fi.ModTime().Hour())
+	timeM := strconv.Itoa(fi.ModTime().Minute())
+	if len(timeH) <= 1 {
+		timeH = "0" + timeH
+	}
+	if len(timeM) <= 1 {
+		timeM = "0" + timeM
+	}
+
+	mod = day + " " + month[0:3] + " " + timeH + ":" + timeM
+	return mod
+}
+
+func PrintHeaders() {
+	headersOutput := color.New(color.FgHiBlack).Add(color.Underline)
+	//headersOutput.Printf("%-10s %7s %5s %11s\n", "Type", "Size", "Time", "Name") //leave this
+	headersOutput.Printf("%-10s ", "Type")
+	headersOutput.Printf("%7s ", "Size")
+	headersOutput.Printf("%5s ", "Time")
+	headersOutput.Printf("%11s\n", "Name")
+}
+
+func main() {
+	var flagNoColor = flag.Bool("no-colour", false, "Disable color output")
+	var flagNoList = flag.Bool("no-l", false, "Disable ls -l output")
+	var dir string
+
+	flag.Parse()
+
+	if *flagNoColor {
+		color.NoColor = true
+	}
+
+	dirOutput := color.New(color.FgCyan, color.Bold)
+	fileOutput := color.New(color.FgWhite, color.Bold)
+
+	if len(os.Args) == 1 {
+		dir = "."
+	} else {
+		dir = os.Args[1]
+	}
+
+	files, err := os.ReadDir(dir)
+
+	if err != nil {
+		usage()
+	}
+	if !*flagNoList {
+		PrintHeaders()
+	}
+
+	for _, file := range files {
+		fileName := file.Name()
+		fileType := file.Type()
+		dirSize := "-"
+		fileSize := ""
+		fileModTime := ""
+
+		fi, err := os.Stat(fileName)
+		if err != nil {
+			usage()
+		}
+		fileSize = formatFileSize(fi)
+		fileModTime = getFileMod(fi)
+
+		if !*flagNoList {
+			if file.IsDir() {
+				dirOutput.Printf("%s %7s %7s\t%s\n", fileType, dirSize, fileModTime, fileName) //leave this
+			} else {
+				fmt.Printf("%7s %7s %4s", fileType, fileSize, fileModTime)
+				fileOutput.Printf("\t%s\n", fileName)
+			}
+		} else {
+			if file.IsDir() {
+				dirOutput.Printf("%s\n", fileName)
+			} else {
+				fileOutput.Printf("%s\n", fileName)
+			}
+		}
+
+	}
+}