small go program for stripping header/footer

gutcontent.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+)
+
+/*
+Given a project gutenberg plaintext book filename, open it and print just the content.
+*/
+
+func main() {
+	if len(os.Args) < 2 {
+		fmt.Fprintln(os.Stderr, "need a filename argument")
+		os.Exit(1)
+	}
+	filename := os.Args[1]
+	f, err := os.Open(filename)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "could not open '%s' for reading\n", filename)
+		os.Exit(2)
+	}
+
+	s := bufio.NewScanner(f)
+	inHeader := true
+	inFooter := false
+	skippedAll := true
+	for s.Scan() {
+		text := strings.TrimSpace(s.Text())
+		if inFooter {
+			break
+		}
+		if strings.HasPrefix(text, "*** START") {
+			inHeader = false
+			continue
+		}
+		if inHeader {
+			continue
+		}
+		if strings.HasPrefix(text, "*** END") {
+			inFooter = true
+			continue
+		}
+		fmt.Println(text)
+		if skippedAll {
+			skippedAll = false
+		}
+	}
+	if skippedAll {
+		fmt.Fprintln(os.Stderr, "warning: found no text to print")
+	}
+}