fix bad error formating, usage of io/utils...

gm.go

@@ -52,7 +52,7 @@ func mainEnd() {
 
 // If we terminate with Ctrl/Cmd-C we call end()
 func catchCtrlC() {
-	c := make(chan os.Signal)
+	c := make(chan os.Signal, 1)
 	signal.Notify(c, os.Interrupt, syscall.SIGTERM)
 	go func() {
 		<-c

gm_build.go

@@ -2,7 +2,6 @@ package main
 
 import (
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strings"
@@ -27,7 +26,7 @@ func buildMd(infile string) {
 		dir = "."
 	}
 	// read the input
-	markdown, err := ioutil.ReadAll(input)
+	markdown, err := io.ReadAll(input)
 	check(err, "Problem reading the markdown.")
 
 	//compile the input
@@ -45,7 +44,7 @@ func buildMd(infile string) {
 		if os.MkdirAll(filepath.Dir(outfile), os.ModePerm) != nil {
 			check(err, "Problem to reach/create folder:", filepath.Dir(outfile))
 		}
-		err = ioutil.WriteFile(outfile, html, 0644)
+		err = os.WriteFile(outfile, html, 0644)
 		check(err, "Problem modifying", outfile)
 	}
 }

gm_compile.go

@@ -34,7 +34,7 @@ func compile(markdown []byte) (html []byte, err error) {
 	// convert md to html code
 	err = mdParser.Convert(markdown, &htmlBuf)
 	if err != nil {
-		return nil, fmt.Errorf("Problem parsing markdown code to html with goldmark.\n %w", err)
+		return nil, fmt.Errorf("problem parsing markdown code to html with goldmark: %w", err)
 	}
 
 	// combine the template and the resulting
@@ -49,7 +49,7 @@ func compile(markdown []byte) (html []byte, err error) {
 	htmlBuf.Reset()
 	err = mdTemplate.Execute(&htmlBuf, data)
 	if err != nil {
-		return nil, fmt.Errorf("Problem building HTML from template.\n %w", err)
+		return nil, fmt.Errorf("problem building HTML from template: %w", err)
 	}
 
 	return htmlBuf.Bytes(), nil

gm_parameters.go

@@ -4,7 +4,6 @@ import (
 	"errors"
 	"fmt"
 	"html/template"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strings"
@@ -157,7 +156,7 @@ func SetParameters() {
 		css = "https://kpym.github.io/markdown-css/" + css + ".min.css"
 	}
 	// set the template
-	t, err := ioutil.ReadFile(htmlshell)
+	t, err := os.ReadFile(htmlshell)
 	if err == nil {
 		htmlshell = string(t)
 	}
@@ -180,7 +179,7 @@ func SetParameters() {
 // if the positional parameter is like `path/folder/` then `path/folder` is served and `/` is requested
 func setServeParameters() {
 	if pflag.NArg() > 1 {
-		check(errors.New("Only one file or folder can be specified for serving."))
+		check(errors.New("only one file or folder can be specified for serving"))
 	}
 
 	filename := "."
@@ -197,7 +196,7 @@ func setServeParameters() {
 		serveDir = filepath.Dir(filename)
 		serveFile = filepath.Base(filename)
 	default:
-		check(fmt.Errorf("The specified path '%s'is not a file or folder.", filename))
+		check(fmt.Errorf("the specified path '%s'is not a file or folder", filename))
 	}
 
 	// set the default title
@@ -216,20 +215,19 @@ func setBuildParameters() {
 	// check for positional parameters
 	if len(inpatterns) == 0 {
 		pflag.Usage()
-		check(errors.New("At least one input 'file.md', 'p*ttern' or 'stdin' should be provided."))
+		check(errors.New("at least one input 'file.md', 'p*ttern' or 'stdin' should be provided"))
 	}
 
 	// check the "out dir"
 	if outdir != "" {
 		if os.MkdirAll(outdir, os.ModePerm) != nil {
-			check(fmt.Errorf("The specified output folder '%s' is not reachable.", outdir))
+			check(fmt.Errorf("the specified output folder '%s' is not reachable", outdir))
 		}
 	}
 }
 
 // setGoldMark creates a new markdown parser with configuration based on the parameter flags.
-// The code is borrowed from:
-//		https://github.com/gohugoio/hugo/blob/d90e37e0c6e812f9913bf256c9c81aa05b7a08aa/markup/goldmark/convert.go
+// The code is borrowed from: https://github.com/gohugoio/hugo/blob/d90e37e0c6e812f9913bf256c9c81aa05b7a08aa/markup/goldmark/convert.go
 func setGoldMark() {
 	var (
 		rendererOptions []renderer.Option

gm_serve.go

@@ -2,7 +2,6 @@ package main
 
 import (
 	"fmt"
-	"io/ioutil"
 	"net"
 	"net/http"
 	"os"
@@ -86,7 +85,7 @@ func serveFiles() {
 				}
 				return
 			}
-			if content, err := ioutil.ReadFile(filename); err == nil {
+			if content, err := os.ReadFile(filename); err == nil {
 				if html, err := compile(content); err == nil {
 					info(" serve converted .md file.")
 					w.Write(html)
@@ -122,7 +121,7 @@ func serveFiles() {
 				<-ticker.C
 				if exit.isYes() {
 					info("\nNo request for 2 seconds. Exit.\n\n")
-					os.Exit(0)
+					mainEnd()
 				}
 				exit.yes() // should be rest to no by the next request in less than 2 seconds
 			}