gen-syntax-highlight-as-rtf-via-pygmentize

#!/usr/bin/env bash
# Author: Goldie Lin
# Description: Convert source code to RTF with syntax highlighting.
# Requirements:
#   * pygmentize (python script)
#   * python-pygments (python library)
#   * libreoffice (optional)
#   * abiword (optional)
# Usage:
#   $ gen-syntax-highlight-as-rtf-via-pygmentize <file>
#     It'll generated a new <file.rtf> with syntax highlighting of the input
#     source code.  Then, you can use LibreOffice or AbiWord to open this
#     <file.rtf>, and copy contain to other program. (e.g., LibreOffice
#     Impress, LibreOffice Writter, or another AbiWord.)
#   $ pygmentize -L styles
#     Show more avaiable styles supported by pygments.

# References:
#   * https://blog.gslin.org/archives/2016/10/22/6930/%E5%B0%8D%E6%8A%95%E5%BD%B1%E7%89%87%E7%9A%84%E7%A8%8B%E5%BC%8F%E7%A2%BC%E5%8A%A0%E4%B8%8A%E8%89%B2%E5%BD%A9/
#   * https://evertpot.com/syntax-highlighting-in-presentations/
#   * http://pygments.org/docs/cmdline/

set -euo pipefail

# Variable definitions
# ====================

# Light themes:
#   default, paraiso-light, xcode, vs, autumn, colorful, emacs, tango,
#   friendly, manni, pastie, perldoc.
# Dark themes:
#   native, paraiso-dark, vim, monokai, fruity, igor, rrt.
pygments_opt="style=default"  # styles I preferred are: default, native, vim, xcode, emacs.

# Function definitions
# ====================

main() {
  local -r input="$(readlink -f "$1")"
  local -r rtf="${input}.rtf"

  if [[ ! -f "${input}" ]]; then
    echo "Usage: $0 <file>"
  else
    # pass the rest of arguments to pygmentize.
    shift
    if (( $# )); then
      pygmentize "$@" -O "${pygments_opt}" -f "rtf" -o "${rtf}" "${input}"
    else
      pygmentize -O "${pygments_opt}" -f "rtf" -o "${rtf}" "${input}"
    fi
  fi
}

main "$@"