Build with make

.gitignore

@@ -1 +1,2 @@
 book.pdf
+book.tex

Makefile

@@ -0,0 +1,11 @@
+chapters := 01 02 03 04 05 06 07 08 09 10 11 12 appendix
+edited_chapters := $(foreach chapter,$(chapters),edited/$(chapter).markdown)
+
+book.pdf: $(edited_chapters) title.txt Makefile
+	pandoc -o book.pdf title.txt $(edited_chapters) --table-of-contents --number-sections -V documentclass=book
+
+edited/%.markdown: original/%.markdown edit-chapter.go Makefile
+	go run edit-chapter.go $< $@
+
+book.tex: $(edited_chapters) title.txt Makefile
+	pandoc -o book.tex title.txt $(edited_chapters) --table-of-contents --number-sections -V documentclass=book

edit-chapter.go

@@ -4,9 +4,8 @@ package main
 
 import (
 	"bytes"
-	"log"
+	"fmt"
 	"os"
-	"path/filepath"
 	"regexp"
 )
 
@@ -74,34 +73,35 @@ func replaceFootnote(src []byte) []byte {
 }
 
 func run() error {
-	paths, err := filepath.Glob("original/*.markdown")
+	if len(os.Args) != 3 {
-	if err != nil {
+		fmt.Fprintf(os.Stderr, "usage: %s <infile> <outfile>\n", os.Args[0])
-		return err
+		os.Exit(64) // command line usage error
 	}
-	for _, path := range paths {
+	inpath := os.Args[1]
-		b, err := os.ReadFile(path)
+	outpath := os.Args[2]
+
+	text, err := os.ReadFile(inpath)
 	if err != nil {
 		return err
 	}
 
-		var edited = b
 	for _, r := range replacers {
-			edited = r.re.ReplaceAll(edited, []byte(r.replacement))
+		text = r.re.ReplaceAll(text, []byte(r.replacement))
 	}
-		edited = footnoteRE.ReplaceAllFunc(edited, replaceFootnote)
+	text = footnoteRE.ReplaceAllFunc(text, replaceFootnote)
 
-		outpath := filepath.Join("edited", filepath.Base(path))
+	err = os.WriteFile(outpath, text, 0666)
-		err = os.WriteFile(outpath, edited, 0666)
 	if err != nil {
 		return err
 	}
-	}
+
 	return nil
 }
 
 func main() {
 	err := run()
 	if err != nil {
-		log.Fatal(err)
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
 	}
 }

makepdf.sh

@@ -1,8 +0,0 @@
-#!/usr/bin/env bash
-
-pandoc -o book.pdf title.txt \
-	edited/{01,02,03,04,05,06,07,08,09,10,11,12}.markdown \
-	edited/appendix.markdown \
-	--table-of-contents \
-	--number-sections \
-	-V documentclass=book