.\"     %A%
.\"
.Dd January 7, 2008
.Dt MARKDOWN 1
.Os MASTODON
.Sh NAME
.Nm markdown
.Nd text to html conversion tool
.Sh SYNOPSIS
.Nm
.Op Fl d
.Op Fl T
.Op Fl V
.Op Fl b Ar url-base
.Op Fl C Ar prefix
.Op Fl F Pa bitmap
.Op Fl f Ar flags
.Op Fl n
.Op Fl o Pa file
.Op Fl S
.Op Fl s Pa text
.Op Fl t Pa text
.Op Pa textfile
.Sh DESCRIPTION
The
.Nm
utility reads the
.Xr markdown 7 Ns -formatted
.Pa textfile
.Pq or stdin if not specified,
compiles it, and writes the html output
to stdout.
.Pp
The options are as follows:
.Bl -tag -width "-o file"
.It Fl b Ar url-base
Links in source beginning with / will be prefixed with
.Ar url-base
in the output.
.It Fl C
When processing markdown extra-style footnotes, use the
given prefix instead of the default of
.Ar fn .
.It Fl d
Instead of writing the html file, dump a parse
tree to stdout.
.It Fl f Ar flags
Set or clear various translation flags.   The flags
are in a comma-delimited list, with an optional
.Ar +
(enable),
.Ar -
(disable), or
.Ar no
(disable) lprefix on each flag.
.Bl -tag -width "definitionlist"
.It Ar links
Allow links.
.It Ar image
Allow images.
.It Ar smarty
Enable smartypants.
.It Ar pants
Enable smartypants.
.It Ar html
Allow raw html.
.It Ar strict
Disable superscript, strikethrough & relaxed emphasis.
.It Ar ext
Enable pseudo-protocols.
.It Ar cdata
Generate code for xml 
.Em ![CDATA[...]] .
.It Ar superscript
Enable superscript processing.
.It Ar emphasis
Emphasis happens 
.Em everywhere .
.It Ar tables
Don't process PHP Markdown Extra tables.
.It Ar del
Enable
.Em ~~strikethrough~~ .
.It Ar strikethrough
Enable 
.Em ~~strikethrough~~ .
.It Ar toc
Enable table-of-contents processing.
.It Ar 1.0
Compatibility with MarkdownTest_1.0
.It Ar autolink
Make
.Pa http://foo.com
a link even without
.Em <> .
.It Ar safelink
Paranoid check for link protocol.
.It Ar header
Process pandoc-style header blocks.
.It Ar tabstop
Expand tabs to 4 spaces.
.It Ar divquote
Allow
.Pa >%class%
blocks.
.It Ar alphalist
Allow alphabetic lists.
.It Ar definitionlist
Allow definition lists at all (default). Use
.Em dldiscount
and
.Em dlextra
to control which syntaxes are respected.
.It Ar dldiscount
Enable discount-style definition lists (default).
.It Ar dlextra
Enable extra-style definition lists (not default). Both styles may be enabled simultaneously.
.It Ar footnote
Allow markdown extra-style footnotes.
.It Ar style
Extract <style> blocks from the output.
.It Ar fencedcode
Allow fenced code blocks (not default).
.It Ar idanchor
Use id= anchors for table-of-contents links instead of <a name=/> (not default).
.It Ar githubtags
Allow underscore and dash in passed through element names (not default).
.It Ar urlencodedanchor
Use url-encoded chars for multibyte and nonalphanumeric chars rather than dots in toc links.
.El
.Pp
As an example, the option
.Fl f Ar nolinks,smarty
tells
.Nm
to not allow \<a tags, and to do smarty
pants processing.
.It Fl F Ar bitmap
Set translation flags.
.Ar Bitmap
is a bit map of the various configuration options
described in
.Xr markdown 3 
(the flag values are defined in
.Pa mkdio.h )
.It Fl n
Don't write generated html.
.It Fl o Pa file
Write the generated html to 
.Pa file .
.It Fl S
output <style> blocks.
.It Fl V
Show the version# and compile-time configuration data.
.Pp
If the version includes the string
.Em DEBUG ,
.Nm
was configured with memory allocation debugging.
.Pp
If the version includes the string
.Em TAB ,
.Nm
was configured to use the specified tabstop.
.It Fl VV
Show the version#, the compile-time configuration, and the
run-time configuration.
.It Fl t Ar text
Use
.Xr mkd_text 3
to format 
.Ar text
instead of processing stdin with the
.Xr markdown 3
function.
.It Fl T
If run with the table-of-content flag on, dump the
table of contents before the formatted text.
.It Fl s Ar text
Use the
.Xr markdown 3
function to format
.Ar text .
.El
.Sh RETURN VALUES
The
.Nm
utility exits 0 on success, and >0 if an error occurs.
.Sh SEE ALSO
.Xr markdown 3 ,
.Xr markdown 7 ,
.Xr mkd-extensions 7 .
.Sh AUTHOR
.An David Parsons
.Pq Li orc@pell.portland.or.us