test

go.mod

@@ -2,7 +2,10 @@ module go-linux-tools/go-grep
 
 go 1.20
 
-require github.com/fatih/color v1.15.0
+require (
+	github.com/fatih/color v1.15.0
+	golang.org/x/exp v0.0.0-20230728194245-b0cb94b80691
+)
 
 require (
 	github.com/mattn/go-colorable v0.1.13 // indirect

go.sum

@@ -5,6 +5,8 @@ github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovk
 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/exp v0.0.0-20230728194245-b0cb94b80691 h1:/yRP+0AN7mf5DkD3BAI6TOFnd51gEoDEb8o35jIFtgw=
+golang.org/x/exp v0.0.0-20230728194245-b0cb94b80691/go.mod h1:FXUEEKJgO7OQYeo8N01OfiKP8RXMtf6e8aTskBGqWdc=
 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

@@ -1,10 +1,10 @@
 package main
 
 import (
-	"flag"
 	"fmt"
 	"io/ioutil"
 	"os"
+	"strings"
 
 	"github.com/fatih/color"
 )
@@ -21,16 +21,8 @@ func usage() {
 }
 
 func main() {
-	var flagNoColor = flag.Bool("no-colour", false, "Disable color output")
-	flag.Parse()
-	if *flagNoColor {
-		color.NoColor = true
-	}
-
-	//set up colourful output
 	found := color.New(color.FgRed).PrintfFunc()
 
-	//check no args passed (min. two args need to be passed) and no more than 3
 	if len(os.Args) <= 2 || len(os.Args) > 3 {
 		usage() //print usage and then exit
 		os.Exit(1)
@@ -38,22 +30,23 @@ func main() {
 
 	search := os.Args[1]
 	filename := os.Args[2]
-	fmt.Printf("search: %s\nfilename: %s\n\n", search, filename)
 
 	bytes, err := ioutil.ReadFile(filename)
 	check(err)
 
 	word := ""
-	//split []bytes into words by spaces
+	line := ""
 	for i := 0; i < len(bytes); i++ {
 		word += string(bytes[i])
-		if string(bytes[i]) == " " {
+
-			fmt.Print(word)
+		if string(bytes[i]) == "\n" {
-			word = ""
+			line = word
-		}
+			if strings.Contains(line, search) {
-		if word == search {
+				found("%s", word)
-			found("%s", word)
+			}
-			word = ""
+
+			line = ""
+			word = "" //reset line and word
 		}
 	}
 }