Add More Internal Variables

[iwelch]

• Please add the current filename into a variable that the template can use (default templates loading accompanying style files #9974). Effort should be minimal --- on file opening, just populate the global variable. (It could be more elegant if it were a list that was pushed and popped, but I don't know Haskell.). Ideally, have the basename as a global, too. Having these variables makes for much more elegant templates that use the filename to include related files. <link rel="stylesheet" href="$basename.css">.

• Please add yaml fields into usable variables.

---
title: "my title"
---

# $title$

I want to discuss the $title$.

The relative effort of offering this feature (if it doesn't already exist and I missed it) inside pandoc itself vs. writing a preprocessor that rescans the YAML is probably low.

[badumont]

- Please add yaml fields into usable variables. --- title: "my title" --- # $title$ I want to discuss the $title$.

For the moment, this can be done using a filter like the following one: ``` local placeholders = {} local function get_placeholder_data(meta) for placeholder, value in pairs(meta.placeholders) do placeholders[placeholder] = value end end local function replace_placeholders(str) local value local before, placeholder, after = string.match(str.text, '(.*){{([^}]+)}}(.*)') if placeholder then value = placeholders[placeholder] if value then if before then table.insert(value, 1, pandoc.Str(before)) end if after then table.insert(value, pandoc.Str(after)) end else value = pandoc.Strong(pandoc.Str('??')) warn('Definition not found for the placeholder "' .. placeholder .. '".') end end return value end return { { Meta = get_placeholder_data }, { Str = replace_placeholders } } ``` Here is a sample: ``` --- title: "my title" placeholders: title: "my title" myname: "John [Doe]{.smallcaps}" --- # {{title}} I, {{myname}}, want to discuss the {{title}}. ``` Note that the dollars syntax is to be avoided here for it is already used by the tex_math_dollars extension.

[iwelch]

this would be a very nice feature for everyone to have. most importantly, the implementation and maintenance cost for this feature on the pandoc end would probably be modest.

[iandol]

Most users [probably] don't need this feature[1], and this is the great benefit of filters. Quarto does something similar, where they have {{shortcode}} extensions (lua filters), that people add as needed...

---

[1] I assume it would need to be part of the AST, and therefore would require a significant change...

[jgm]

Please add the current filename into a variable that the template can use

See https://pandoc.org/MANUAL.html#variables-set-automatically -- specifically sourcefile.

[iwelch]

add $basename$ ?