#!/bin/bash

set -euo pipefail

# Run the live-code bits within the markup files. See README.md for details.

if [ $# -ge 1 ]; then
  names="$@"
  names=$(echo "$names" | sed 's/\.md\.in$//g')
  names=$(echo "$names" | sed 's/\.md$//g')
else
  names=$(echo *.md.in | sed 's/\.md\.in//g')
fi

# Live code-generation needs to be using mlr from *this* tree, not from
# somewhere else in the PATH.
if [ ! -x ../../mlr ]; then
  echo "$0: Need ../../mlr to exist: please check 'make build' in ../.." 1>&2
  exit 1
fi
export PATH=../..:$PATH

for name in $names; do
  echo Generating $name.md
  if [ -f $name.md ]; then # Won't exist yet on first run
    chmod u+w $name.md
  fi
  # The filename is used for link-generation; file contents
  # are read from standard input.
  ./genmd-filter $name.md.in < $name.md.in > /tmp/$name.md.tmp
  mv /tmp/$name.md.tmp $name.md
  chmod 400 $name.md
done