Re: Passing multiple options to lua-filter from CLI

[William Lupton <wlupton-QSt+ys/nuMyEUIsrzH9SikB+6BGkLq7r@public.gmane.org>]

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You can't use my utils because I didn't supply it! I suggested using
inspect (https://github.com/kikito/inspect.lua) to get something similar.
Sorry... I was just using my utils to illustrate the AST.

Anyway, please can you run this in your local environment and report what
you see? If you don't see the same as me then I don't know what to suggest!

Filter (this has changed a little bit but not substantively):

*% *cat default-code-class.lua

local use_utils = false

local utils = nil


if use_utils then

    utils = require 'utils'

end


local default_code_classes = {}


local function get_default_code_class(meta)

  if utils then

      utils.temp('meta', meta)

  end

  if meta['default-code-class'] then

      default_code_classes =

          {pandoc.utils.stringify(meta['default-code-class'])}

  end

end


local function add_default_code_class(el)

    if utils then

        utils.temp(el)

    end

    if #(el.classes) == 0 then

        el.classes = default_code_classes

        return el

    end

end


return {{Meta=get_default_code_class},

        {Code=add_default_code_class, CodeBlock=add_default_code_class}}

Markdown:

*% *cat code.md

This is `inline code`.


```

This is a code block.

```

Invocation:

*% *pandoc -L default-code-class.lua code.md -M default-code-class="c
numberLines"

<p>This is <code class="c numberLines">inline code</code>.</p>

<pre class="c numberLines"><code>This is a code block.</code></pre>

On Fri, 20 Aug 2021 at 18:03, Clément Aubert <aubert.clement-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:

> Thanks!
>
> pandoc -v
> pandoc 2.14.1
> Compiled with pandoc-types 1.22, texmath 0.12.3, skylighting 0.11,
> citeproc 0.4.1, ipynb 0.1.0.1
> User data directory: /home/caubert/.local/share/pandoc
>
> with the first line (about utils), I now get
>
> Error running filter templates/filters/default-code-class.lua:
> templates/filters/default-code-class.lua:1: module 'utils' not found:
>         utilsis not one of pandoc's default packages
>         no field package.preload['utils']
>         no file '/usr/local/share/lua/5.3/utils.lua'
>         no file '/usr/local/share/lua/5.3/utils/init.lua'
>         no file '/usr/local/lib/lua/5.3/utils.lua'
>         no file '/usr/local/lib/lua/5.3/utils/init.lua'
>         no file './utils.lua'
>         no file './utils/init.lua'
>         no file '/usr/local/lib/lua/5.3/utils.so'
>         no file '/usr/local/lib/lua/5.3/loadall.so'
>         no file './utils.so'
> stack traceback:
>         [C]: in function 'require'
>         templates/filters/default-code-class.lua:1: in main chunk
> make: *** [Makefile:281: build/labs/If/index.html] Error 83
>
> without it, I get
>
> Error running filter templates/filters/default-code-class.lua:
> templates/filters/default-code-class.lua:7: attempt to index a nil value
> (global 'utils')
> stack traceback:
>         templates/filters/default-code-class.lua:7: in function
> 'get_default_code_class'
> make: *** [Makefile:281: build/labs/If/index.html] Error 83
>
>
>
>
>
> Le ven. 20 août 2021 à 12:26, William Lupton <wlupton@broadband-forum.org>
> a écrit :
>
>> Inline...
>>
>> On Fri, 20 Aug 2021 at 17:06, Clément Aubert <aubert.clement@gmail.com>
>> wrote:
>>
>>> Thanks a lot for looking into it!
>>> It does not seem to produce the desired effect on my end.
>>>
>>> Could you explain how changing
>>> return {{Meta = get_default_code_class},
>>>         {Code = add_default_code_class},
>>>         {CodeBlock = add_default_code_class}}
>>> into
>>> return {{Meta=get_default_code_class},
>>> {CodeBlock=add_default_code_class}}
>>> (as far as I can tell, this is the only modification) is supposed to
>>> achieve the desired effect?
>>>
>>
>> Ah, well I don't think that you included this in your original message,
>> so I thought that was the problem :).
>>
>> return {{Meta = get_default_code_class},
>>         {Code = add_default_code_class},
>>         {CodeBlock = add_default_code_class}}
>>
>> You are correct: the only difference is that you have Code. You could
>> combine Code and CodeBlock into a single pass, as in:
>>
>> return {{Meta=get_default_code_class},
>>         {Code=add_default_code_class, CodeBlock=add_default_code_class}}
>>
>> But it _does_ work for me! Maybe add some debug output? Here I'm using my
>> own inspect-like function but the standard inspect would probably be
>> similar.
>>
>> Pandoc version? I'm using 2.14.1.
>>
>> *% *cat default-code-class.lua
>>
>> utils = require 'utils'
>>
>>
>> local default_code_classes = {}
>>
>>
>> function get_default_code_class(meta)
>>
>>   utils.temp('meta', meta)
>>
>>   if meta['default-code-class'] then
>>
>>     default_code_classes =
>> {pandoc.utils.stringify(meta['default-code-class'])}
>>
>>   end
>>
>> end
>>
>>
>> function add_default_code_class(el)
>>
>>   utils.temp(el.tag, el)
>>
>>   if #(el.classes) == 0 then
>>
>>     el.classes = default_code_classes
>>
>>     return el
>>
>>   end
>>
>> end
>>
>>
>> return {{Meta=get_default_code_class},
>>
>>         {Code=add_default_code_class, CodeBlock=add_default_code_class}}
>>
>>
>> *% *LUA_PATH=../?.lua pandoc -L default-code-class.lua code.md -M
>> default-code-class="c numberLines"
>>
>> (#) meta {default-code-class: "c numberLines"}
>>
>> (#) Code Code {
>>
>>   attr: Attr {
>>
>>     attributes: {}
>>
>>     classes: {}
>>
>>     identifier: ""
>>
>>   }
>>
>>   text: "inline code"
>>
>> }
>>
>> (#) CodeBlock CodeBlock {
>>
>>   attr: Attr {
>>
>>     attributes: {}
>>
>>     classes: {}
>>
>>     identifier: ""
>>
>>   }
>>
>>   text: "This is a code block."
>>
>> }
>>
>> <p>This is <code class="c numberLines">inline code</code>.</p>
>>
>> <pre class="c numberLines"><code>This is a code block.</code></pre>
>>
>> Thanks!
>>>
>>> Le ven. 20 août 2021 à 11:57, William Lupton <
>>> wlupton-QSt+ys/nuMyEUIsrzH9SikB+6BGkLq7r@public.gmane.org> a écrit :
>>>
>>>> I think you need a two-pass filter, one to pick up the metadata and the
>>>> other to use it (this is because Meta is called nearly last).
>>>>
>>>> This works (I've re-ordered your functions and declared a local
>>>> variable, but this probably wasn't necessary).
>>>>
>>>> *% *cat default-code-class.lua
>>>>
>>>> local default_code_classes = {}
>>>>
>>>>
>>>> function get_default_code_class(meta)
>>>>
>>>>   if meta['default-code-class'] then
>>>>
>>>>     default_code_classes =
>>>> {pandoc.utils.stringify(meta['default-code-class'])}
>>>>
>>>>   end
>>>>
>>>> end
>>>>
>>>>
>>>> function add_default_code_class(el)
>>>>
>>>>   if #(el.classes) == 0 then
>>>>
>>>>     el.classes = default_code_classes
>>>>
>>>>     return el
>>>>
>>>>   end
>>>>
>>>> end
>>>>
>>>>
>>>> return {{Meta=get_default_code_class},
>>>> {CodeBlock=add_default_code_class}}
>>>>
>>>>
>>>> *% *pandoc -L default-code-class.lua code.md -M default-code-class="c
>>>> numberLines"
>>>>
>>>> <pre class="c numberLines"><code></code></pre>
>>>>
>>>> On Fri, 20 Aug 2021 at 16:29, Clément Aubert <aubert.clement@gmail.com>
>>>> wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> This question relates to
>>>>> https://github.com/jgm/pandoc/issues/2104#issuecomment-595983954
>>>>> There is a lua filter containing
>>>>>
>>>>> ``` lua
>>>>> function add_default_code_class(el)
>>>>>   if #(el.classes) == 0 then
>>>>>     el.classes = default_code_classes
>>>>>     return el
>>>>>   end
>>>>> end
>>>>>
>>>>> function get_default_code_class(meta)
>>>>>   if meta['default-code-class'] then
>>>>>     default_code_classes =
>>>>> {pandoc.utils.stringify(meta['default-code-class'])}
>>>>>   end
>>>>> end
>>>>> ```
>>>>>
>>>>> and I'm trying to tweak it so that two classes can be passed from the
>>>>> command-line, eg. using
>>>>>
>>>>> --lua-filter default-code-class.lua -M default-code-class=c,
>>>>> numberLines
>>>>>
>>>>> but can't find a way.
>>>>>
>>>>> Thanks!
>>>>> Clément.
>>>>>
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>>>>> .
>>>>>
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