#! /bin/bash


usage="$0 TEXFILE"

# Runs bibtex ${TEXFILE:r} and latex ${TEXFILE} repeatedly until 
# the ".aux" and ".bbl" files are stable.

if [[ $# -ne 1 ]]; then 
  echo "usage: ${usage}" 1>&2; exit 1
fi

name="$1"; shift;

source "${STOLFIHOME}/lib/latex-parse-name.sh"
echo "run-latex: name = ${name} ext = ${ext}" 1>&2

auxiliaries=( aux bbl toc lof lot ) 

# Make sure that the auxiliary targets exist:
echo "run-latex: making sure that auxiliary files exist" 1>&2
for ext in ${auxiliaries[@]} ; do
  target="${name}.${ext}"
  if [[ ! -r ${target} ]]; then touch ${target}; fi
done

# Loop until convergence:
while [[ 1 ]]; do
  # Save current version of files:
  for ext in ${auxiliaries[@]} ; do
    target="${name}.${ext}"
    /bin/cp -v ${target} ${target}~~
  done
  
  # Run bibtex and latex
  bibtex ${name}
  bibfailed=$?
  echo "run-latex: status = $bibfailed" 1>&2
  which latex
  latex ${name} > ${name}.errs
  texfailed=$?
  echo "run-latex: status = $texfailed" 1>&2
  if [[ ${texfailed} ]]; then break; fi
  
  # Check if any of the result files changed:
  changed=0
  for ext in ${auxiliaries[@]} ; do
    target="${name}.${ext}"
    if ! { cmp -s ${target} ${target}~~; } ; then
      echo "run-latex: ${target} changed" 1>&2
      changed=1
      ( ls -l ${target}~~ ${target} ; \
          diff ${target}~~ ${target} \
          | prettify-diff-output z \
          | head -10 z \
      ) \
      | sed -e 's/^/  | /'
    fi
  done
  if [[ ! ${changed} ]]; then break; fi
done

# Either bibtex/latex failed or the process converged.
# Print the error messages

cat ${name}.errs | tex-error-filter
# cat ${name}.errs
echo "run-latex: done" 1>&2

exit ${texfailed}