man2pdf

#!/usr/bin/env bash

#man -t ledger | ps2pdf - /tmp/man-ledger.pdf && open /tmp/man-ledger.pdf
MAN_ARGS=("$@")
IDENTIFIER="$(echo "${MAN_ARGS[@]}" | sed -e 's/ //g')"

PDF_FILENAME="man-${IDENTIFIER}.pdf"
PDF_TARGET="${TMPDIR}${PDF_FILENAME}"

if [[ -f "${PDF_TARGET}" ]]; then
  open "${PDF_TARGET}"
  exit 0
fi

MAN_PATH="$(command -v man)"
if [[ -z "${MAN_PATH}" ]]; then
  >&2 echo "No man found, are manpages actually installed?"
  exit 1
fi

PS2PDF_PATH="$(command -v ps2pdf)"
if [[ -z "${PS2PDF_PATH}" ]]; then
  >&2 echo "No ps2pdf found, ensure that it is installed."
  exit 2
fi

# ensure it exists first
MANPAGE_PATH="$("${MAN_PATH}" --path ${MAN_ARGS})"
manpath_path_exit=$?
if [[ $manpath_path_exit -ne 0 ]]; then
  #>&2 echo "No manpage available for '${MAN_ARGS}'."
  exit $manpath_path_exit
fi

# -t outputs postscript using groff, see `man man` for details.
# ps2pdf - - means convert stdin to pdf and output on stdout
"${MAN_PATH}" -t "${MAN_ARGS[@]}" | "${PS2PDF_PATH}" - - > "${PDF_TARGET}"

if [[ -f "${PDF_TARGET}" ]]; then
  open "${PDF_TARGET}"
  exit 0
else
  >&2 echo "${PDF_TARGET} does not exist, something went wrong."
  exit 4
fi