ptptex_template/texbuild at main · o-morikawa/ptptex_template · GitHub

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#!/bin/bash
set -u

usage() {
  printf '%s\n' "usage: texbuild FILE.tex" >&2
  exit 1
}

confirm_non_tex() {
  local reply
  printf '%s' "input does not end with .tex. continue? [y/N] " >&2
  read -r reply || true
  case "$reply" in
    y|Y|yes|YES|Yes)
      return 0
      ;;
    *)
      printf '%s\n' "aborted." >&2
      exit 1
      ;;
  esac
}

run_cmd() {
  printf '%s\n' "+ $*"
  "$@"
}

run_latex_pass() {
  local engine=$1
  run_cmd "$engine" -interaction=nonstopmode -file-line-error -synctex=1 "$texfile"
}

run_bibtex_if_needed() {
  local auxfile
  auxfile="${base}.aux"

  if [ -f "$auxfile" ]; then
    if grep -Eq '^(\\citation|\\bibdata|\\abx@aux@cite)' -- "$auxfile"; then
      printf '%s\n' "[bibtex]"
      run_cmd bibtex "$base"
      return 0
    fi
  fi

  return 1
}

need_rerun() {
  local logfile
  logfile="${base}.log"

  if [ ! -f "$logfile" ]; then
    return 1
  fi

  if grep -Eiq \
    '(Rerun to get cross-references right|LaTeX Warning: Label\(s\) may have changed|LaTeX Warning: Citation.*undefined|Package biblatex Warning: Please \(re\)run|Writing index file|Table widths have changed|rerun LaTeX|undefined references)' \
    -- "$logfile"
  then
    return 0
  fi

  return 1
}

run_until_stable() {
  local engine=$1
  local max_runs=5
  local n=1
  local bib_ran=1

  run_latex_pass "$engine"

  if run_bibtex_if_needed; then
    bib_ran=0
    run_latex_pass "$engine"
    n=2
  fi

  while [ "$n" -lt "$max_runs" ]; do
    if need_rerun; then
      n=$((n + 1))
      printf '%s\n' "[rerun $n/$max_runs]"
      run_latex_pass "$engine"
    else
      break
    fi
  done

  if need_rerun; then
    printf '%s\n' "warning: document may still need another LaTeX run." >&2
    return 2
  fi

  return 0
}

run_pdflatex_mode() {
  printf '%s\n' "[pdflatex mode]"
  run_until_stable pdflatex
}

run_platex_mode() {
  printf '%s\n' "[platex mode]"
  run_until_stable platex
  run_cmd dvipdfmx "${base}.dvi"
}

run_uplatex_mode() {
  printf '%s\n' "[uplatex mode]"
  run_until_stable uplatex
  run_cmd dvipdfmx "${base}.dvi"
}

if [ $# -lt 1 ]; then
  usage
fi

texfile=$1

if [ ! -f "$texfile" ]; then
  printf '%s\n' "file not found: $texfile" >&2
  exit 1
fi

case "$texfile" in
  *.tex) ;;
  *)
    confirm_non_tex
    ;;
esac

base=${texfile%.tex}
engine="pdflatex"

first_lines="$(head -n 20 -- "$texfile")"

if printf '%s\n' "$first_lines" | grep -Eq '^%#![[:space:]]*uplatex([[:space:]]|$)'; then
  engine="uplatex"
elif printf '%s\n' "$first_lines" | grep -Eq '^%#![[:space:]]*platex([[:space:]]|$)'; then
  engine="platex"
elif printf '%s\n' "$first_lines" | grep -Eq '^%#![[:space:]]*pdflatex([[:space:]]|$)'; then
  engine="pdflatex"
fi

case "$engine" in
  pdflatex)
    run_pdflatex_mode
    ;;
  platex)
    run_platex_mode
    ;;
  uplatex)
    run_uplatex_mode
    ;;
  *)
    printf '%s\n' "unknown engine: $engine" >&2
    exit 1
    ;;
esac