miller/docs/poki

#!/usr/bin/env ruby

$us = File.basename $0

require 'getoptlong'
require 'fileutils'
require 'json'

# ----------------------------------------------------------------
def main
  input_handle = $stdin
  output_handle = $stdout

  input_handle.readlines.each do |content_line|

  if content_line =~ /POKI_INCLUDE_ESCAPED\(([^)]+)\)HERE/
    included_file_name = $1
    include_escaped(included_file_name, output_handle)

  elsif content_line =~ /POKI_INCLUDE_AND_RUN_ESCAPED\(([^)]+)\)HERE/
    included_file_name = $1
    cmd = File.readlines(included_file_name).join('')
    run_command(cmd, output_handle)

#    # Page-content directive: run a script which generates HTML and print its output
#    elsif content_line =~ /POKI_RUN_UNESCAPED\(([^)]+)\)HERE/
#      included_file_name = $1
#      cmd = File.readlines(included_file_name).join('')
#      run_command(cmd, output_handle, false)
#
#    # Page-content directive: include other file (do HTML escapes) and print its output
#    elsif content_line =~ /POKI_RUN_CONTENT_GENERATOR\(([^)]+)\)HERE/
#      cmd = $1
#      run_content_generator(cmd, output_handle)
#
#    # Page-content directive: format as if included from a file.
#    elsif content_line =~ /POKI_CARDIFY\(([^)]+)\)HERE/
#      content_line = $1
#      cardify(content_line, output_handle, true)
#    elsif content_line =~ /POKI_CARDIFY{{([^)]+)}}HERE/
#      content_line = $1
#      cardify(content_line, output_handle, true)
#
#    elsif content_line =~ /POKI_CARDIFY{{(.+)}}HERE/
#      content_line = $1
#      cardify(content_line, output_handle, true)
#
  elsif content_line =~ /POKI_RUN_COMMAND{{(.+)}}HERE/
     cmd = $1
     run_command(cmd, output_handle)

    # Page-content directive: include other file (do HTML escapes)
#    elsif content_line =~ /POKI_RUN_COMMAND_TOLERATING_ERROR{{(.+)}}HERE/
#      cmd = $1
#      run_command_tolerating_error(cmd, output_handle)

    else
      output_handle.write(content_line)
    end
  end
end

# ----------------------------------------------------------------
def include_escaped(included_file_name, output_handle)
  write_card(File.readlines(included_file_name), output_handle, true)
end

# ----------------------------------------------------------------
def run_command(cmd, output_handle)
  cmd_output = `#{cmd} 2>&1`
  status = $?.to_i
  if status != 0
    raise "\"#{cmd}\" exited with non-zero code #{status}."
  end
  write_card(['$ '+cmd] + cmd_output.split(/\n/), output_handle)
end

## ----------------------------------------------------------------
#def run_command_tolerating_error(cmd, output_handle)
#  cmd_output = `#{cmd} 2>&1`
#  write_card(['$ '+cmd] + cmd_output.split(/\n/), output_handle, true)
#end
#
## ----------------------------------------------------------------
#def run_content_generator(cmd, output_handle)
#  cmd_output = `#{cmd} 2>&1`
#  status = $?.to_i
#  if status != 0
#    raise "\"#{cmd}\" exited with non-zero code #{status}."
#  end
#  output_handle.puts(cmd_output)
#end
#
## ----------------------------------------------------------------
#def cardify(content_line, output_handle)
#  write_card([content_line], output_handle)
#end

# ----------------------------------------------------------------
def write_card(content_lines, output_handle)
  content_lines.each do |content_line|
    output_handle.write('    ')
    output_handle.puts(content_line)
  end
end

## ----------------------------------------------------------------
#def html_escape_line(line)
#  line.gsub("&", "&amp;").gsub("<", "&lt;").gsub(">", "&gt;").rstrip
#end

# ================================================================
main()