"Text Processing" - r/scripting/drfu1w

#!/bin/bash
# Takes data to be processed as an input file, outputting data to stdout (the terminal)

input_data="$1"
lookup_file="materials.txt"

while IFS= read -r input_line; do
  materialdimension1="$(echo ${input_line} | awk '{print $1}')"
  material="${materialdimension1%%[0-9]*}"        # Strips all characters from the line starting from the first digit
  #material="${input_line:0:3}"                     We can use this line instead if every material has a length of 3 characters, and is always the first entry in the line
  dimension1="${materialdimension1##*[a-zA-Z]}"   # Strips all characters ahead of the last letter
  # dimension1="${materialdimension1:3}"            We can use this line instead if, as above, every material has length 3

  dimensions2x3="$(echo ${input_line} | awk '{print $2}')"
  dimension2="${dimensions2x3%%x*}"              # Strips all characters trailing an 'x'
  dimension3="${dimensions2x3##*x}"              # Strips all characters preceeding an 'x'

  amount="$(echo ${input_line} | awk '{print $3}' | sed 's/x//')"   # Strips trailing 'x' from amount value

  volumecost="$(grep "${material}" "${lookup_file}" | awk '{print $2}')"   # Pulls cost/volume value from the lookup file for the current material

  total=$(( (dimension1 * dimension2 * dimension3 * amount * volumecost ) / 1000000 ))   # Multiply everything together, divide by 1,000,000

  echo "${total} - ${input_line}"   # Output the value, along with the input line (for demonstration purposes)
done < "${input_data}"