more functionality to md2latex

.gitignore

@@ -26,6 +26,6 @@
 *.aux
 testresult
 *_bin
-
+_data.tex
 # IDE
 .vscode

cmd/md2latex/main.go

@@ -10,6 +10,7 @@ import (
 	"os"
 	"path/filepath"
 	"strings"
+	"time"
 
 	latex "github.com/soypat/goldmark-latex"
 	"github.com/yuin/goldmark"
@@ -19,6 +20,7 @@ import (
 
 var (
 	usehtml          bool
+	verbose          bool
 	print            bool
 	unhead           bool
 	unsafe           bool
@@ -28,10 +30,11 @@ var (
 )
 
 func main() {
+	flag.BoolVar(&verbose, "v", false, "Verbose output.")
 	flag.BoolVar(&usehtml, "html", false, "Output html")
 	flag.BoolVar(&print, "p", false, "Output to stdout")
 	flag.BoolVar(&unsafe, "unsafe", false, "Render unsafe segments of document such as links or verbatim.")
-	flag.BoolVar(&unhead, "unhead", false, "No heading numbering")
+	flag.BoolVar(&unhead, "unhead", false, "No section numbering")
 	flag.StringVar(&outputFilename, "o", "", "Output filename. By default just adds .tex to input filename.")
 	flag.StringVar(&preambleFilename, "preamble", "", "Preamble filename. If not set uses a default preamble.")
 	flag.IntVar(&headingOffset, "headingoffset", 0, "Section heading offset. Can be negative. Results are clipped between 1 and 6.")
@@ -47,6 +50,7 @@ func run(args []string) error {
 	if len(args) == 0 {
 		return errors.New("missing filename argument")
 	}
+	verb("beginning verbose run")
 	filename := args[0]
 	input, err := readFile(filename)
 	if err != nil {
@@ -86,10 +90,12 @@ func renderGoldmark(input []byte) ([]byte, error) {
 		if err != nil {
 			return nil, err
 		}
+		verb("replacing default preamble with", preambleFilename, "of length", len(b))
 		preamble = b
 	}
 	var rd renderer.Renderer
 	if usehtml {
+		verb("using html renderer")
 		rd = goldmark.DefaultRenderer()
 	} else {
 		rd = renderer.NewRenderer(renderer.WithNodeRenderers(util.Prioritized(latex.NewRenderer(latex.Config{
@@ -101,12 +107,16 @@ func renderGoldmark(input []byte) ([]byte, error) {
 	}
 	md := goldmark.New(goldmark.WithRenderer(rd))
 	var b bytes.Buffer
+	verb("start rendering using goldmark")
+	start := time.Now()
 	err := md.Convert(input, &b)
+	verb("finished rendering in", time.Since(start))
 	return b.Bytes(), err
 }
 
 // Opens, reads and closes file and returns contents.
 func readFile(filename string) ([]byte, error) {
+	verb("opening ", filename)
 	fp, err := os.Open(filename)
 	if err != nil {
 		return nil, err
@@ -117,3 +127,9 @@ func readFile(filename string) ([]byte, error) {
 	}
 	return input, fp.Close()
 }
+
+func verb(a ...any) {
+	if verbose {
+		log.Println(a...)
+	}
+}