ds_intro_lab1_solution.sh

ds_intro_lab1_solution.sh

#!/usr/bin/env bash
filename="$1"

# solution using bash

count=0
while read -r line
do
   if echo "$line" | grep "CHAPTER" > /dev/null; then
      ((count++))
      echo "Processing chapter $count"
      echo > "chapter_$count.txt"
   fi

   if [ $count -gt 0 ]; then
      echo "$line" >> "chapter_$count.txt"
   fi
done < "$filename"

# solution using awk

awk -F' ' 'BEGIN {
  count=0
} {
   if ($1 == "CHAPTER") {
      count++
      file=sprintf("chapter_%d.txt", count)
      print > file
   } else if (count > 0) {
      print >> file
}

}' < "$filename"

# solution using csplit, just

csplit --quiet \
   --prefix "chapter_" \
   --suffix "%02d.txt" "$filename" '/CHAPTER/' '{*}' && \
   rm -rf "chapter_00.txt"