Pretty Printing C++ Archives from Emails

I'm just putting this here because I nearly managed to lose it. This is a part of a pretty unvarnished BASH script for a very specific purpose, taking an email file containing a ZIP of submitted C++ code from students. This script produces pretty printed PDFs of the source files named after each author to facilitate marking and annotation. It's not a thing of beauty. I think I'll probably write a new cleaner version in future.

#!/bin/bash
# 
# A script to take C++ files in coursework and produce pretty printed PDF
# listings named with the author information.
#
# It takes a ZIP file of .cpp and .h files and produces a ZIP file of PDFs
#

# Requires
#   enscript
#   ps2pdf
#   munpack

#
# Called for each file to be encoded
#
pretty_print_file()
{
  # Extract the Author JavaDoc information
  author=1 | sed -n -e 's/^.*@[Aa]uthor (cat /\1/gp')

  # How many lines did we get back?
  lines=author_snip" | wc -l)

  # If we got no author info
  if [ author_snip" ]
    then
      author="no-author"
      author_snip="no-author"
  fi

  # if we got too many
  if [ 1, Author author_snip)"
  output=1
  output+=".pdf"
  echo "Encoding 1 | ps2pdf - parsed-output/1 ]
  then
    echo "Usage: unpack_coursework <email_file>"
    exit
fi

# Make a temporary directory and copy the email file into it.
echo "Creating temporary directory..."
dir=`mktemp -d`
echo 1 dir

# Unpack the email
echo "Unpacking email..."
munpack f *.cpp
  unzip -Cj f
done

# And the same for source files
echo "Parse .cpp files..."
for f in *.cpp
do
  pretty_print_file dir/parsed-output
zip parsed-output *.pdf
cd ..

# Back to the directory we started in.
popd

# Copy the parsed ZIP to the current directory for inspection and marking
cp dir
rm -rf $dir

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