# mkdoc(3tcl) 0.7.0 mkdoc "Source code documentation using Markdown"

## Name

mkdoc - Extracts and optionally converts Markdown comments in source code to HTML

## Synopsis

- package require Tcl 8.6
- package require Markdown ?1.2.1?
- package require yaml ?0.4.1?
- package require mkdoc ?0.7.0?
- package require hook

- ::mkdoc::mkdoc infile outfile ?-css cssfile?
- ::mkdoc::run infile

## Description

The package mkdoc provides a command to extract documentation embedded in code and optionally convert these comments into HTML. The latter uses Tcllib's Markdown package. Each line of the embedded documentation begins with the special comment marker #'.

::mkdoc::mkdoc infile outfile ?-css cssfile?

  The command reads the specified infile and extracts the code comments introduced by the #' marker. If the outfile is either a ".html" or ".htm" file the Markdown is converted into HTML using either a default style or the specified style sheet cssfile.

  All arguments are paths to the files to read from or write to.

  The result of the command is the empty string.

  See section Formatting for the supported Markdown syntax and extensions to it.

::mkdoc::run infile

  The command reads the specified infile, extracts the embedded documentation, and then executes the contents of the first example, i.e. ```-quoted block, found in the Example section.

  Here is such an example which will be executed by the Tcl interpreter

          #' ## <a name="example">Example</a>
          #'
          #' ```
          #' puts "Hello mkdoc package"
          #' puts "I am in the example section"
          #' ```

  DANGER, BEWARE. Failing to open the infile causes the command to exit the entire process.

  Use of this command in a general context is not recommended.

## Examples

The example below demonstrates the conversion of the documentation embedded into the file "mkdoc.tcl" itself:

        package require mkdoc
        # extracting the Markdown
        mkdoc::mkdoc mkdoc.tcl mkdoc.md
        # converting Markdown to HTML
        mkdoc::mkdoc mkdoc.md mkdoc.html
        # direct conversion without intermediate file
        mkdoc::mkdoc mkdoc.tcl mkdoc.html

## Formatting

The package supports the syntax supported by Tcllib's Markdown package.

It further supports a set of simple YAML headers whose information is inserted into appropriate HTML meta-tags. The supported keys are

author

  Set the document author. Defaults to NN.

title

  Set the document title. Defaults to Documentation filename].

date

  Sets the document date. Defaults to the current day.

css

  Sets a custom CSS stylesheet. Defaults to the internal mkdoc sheet.

Note that in Markdown output mode these headers are simply passed through into the result. This is proper, as processors like pandoc are able to use them as well.

See the example below for the syntax:

        #' ---
        #' title: mkdoc::mkdoc 0.7.0
        #' author: Detlef Groth, Schwielowsee, Germany
        #' date: 2022-04-17
        #' css: mini.css
        #' ---
        #'

Another extension over standard Markdown is the support of a single level of includes.

See the example below for the syntax:

        #' #include "path/to/include/file"

Note, the double-quotes around the path are part of the syntax.

Beware further that relative paths are resolved relative to the current working directory, and not relative to the location of the including file.

## Bugs, Ideas, Feedback

This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such to the author of this package. Please also report any ideas for enhancements you may have for either package and/or documentation.

## Code Copyright

BSD License type:

The following terms apply to all files a ssociated with the software unless explicitly disclaimed in individual files.

The authors hereby grant permission to use, copy, modify, distribute, and license this software and its documentation for any purpose, provided that existing copyright notices are retained in all copies and that this notice is included verbatim in any distributions. No written agreement, license, or royalty fee is required for any of the authorized uses. Modifications to this software may be copyrighted by their authors and need not follow the licensing terms described here, provided that the new terms are clearly indicated on the first page of each file where they apply.

In no event shall the authors or distributors be liable to any party for direct, indirect, special, incidental, or consequential damages arising out of the use of this software, its documentation, or any derivatives thereof, even if the authors have been advised of the possibility of such damage.

The authors and distributors specifically disclaim any warranties, including, but not limited to, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement. This software is provided on an "as is" basis, and the authors and distributors have no obligation to provide maintenance, support, updates, enhancements, or modifications.

RESTRICTED RIGHTS: Use, duplication or disclosure by the government is subject to the restrictions as set forth in subparagraph (c) (1) (ii) of the Rights in Technical Data and Computer Software Clause as DFARS 252.227-7013 and FAR 52.227-19.

## Category

Text processing

## Copyright

Copyright © 2019-2022, Detlef Groth <detlef(at)dgroth(dot)de>