Re: [RFC] Org linting library

[Andreas Leha <andreas.leha@med.uni-goettingen.de>]

Nicolas Goaziou <mail@nicolasgoaziou.fr> writes:
> Hello,
>
> The following library implements linting for Org syntax. The sole public
> function is `org-lint', which see.
>
> Internally, the library defines a new structure: `org-lint-checker',
> with the following slots:
>
>   - NAME: Unique check identifier, as a symbol. The check is done
>     calling the function `org-lint-NAME' with one mandatory argument,
>     the parse tree describing the current Org buffer. Such function
>     calls are wrapped within a `save-excursion' and point is always at
>     `point-min'. Its return value has to be an alist (POSITION MESSAGE)
>     when POSITION refer to the buffer position of the error, as an
>     integer, and MESSAGE is a strings describing the error.
>
>   - DESCRIPTION: Summary about the check, as a string.
>
>   - CATEGORIES: Categories relative to the check, as a list of symbol.
>     They are used for filtering when calling `org-lint'. Checkers not
>     explicitly associated to a category are collected in the `default'
>     one.
>
>   - TRUST: The trust level one can have in the check. It is either `low'
>     or `high', depending on the heuristics implemented and the nature of
>     the check. This has an indicative value only and is displayed along
>     reports.
>
> All checks have to be listed in `org-lint--checkers'.
>
> Results are displayed in a special "*Org Lint*" buffer with a dedicated
> major mode, derived from `tabulated-list-mode'. In addition to the usual
> key-bindings inherited from it, "C-j" displays problematic line reported
> under point and "RET" jumps to it.
>
> Checks currently implemented are:
>
>   - duplicates CUSTOM_ID properties
>   - duplicate NAME values
>   - duplicate targets
>   - duplicate footnote definitions
>   - orphaned affiliated keywords
>   - obsolete affiliated keywords
>   - missing language in src blocks
>   - NAME values with a colon
>   - wrong header arguments in src blocks
>   - misuse of CATEGORY keyword
>   - "coderef" links with unknown destination
>   - "custom-id" links with unknown destination
>   - "fuzzy" links with unknown destination
>   - "id" links with unknown destination
>   - links to non-existent local files
>   - special properties in properties drawer
>   - obsolete syntax for PROPERTIES drawers
>   - missing definition for footnote references
>   - missing reference for footnote definitions
>   - non-footnote definitions in footnote section
>   - probable invalid keywords
>   - invalid blocks
>   - probable incomplete drawers
>   - obsolete QUOTE section
>
> Since it relies on lexical binding, `pcase' and `string-prefix-p', it
> cannot be added to Org 8.3, but can make it into Org 8.4, if deemed
> useful enough.
>
> Feedback welcome.
>
>
> Regards,

Hi Nicolas,

I have finally made some time to test this.  I get some
unexpected warnings:

   79 low   Unknown value "myfile.R" for header ":tangle"
  192 low   Unknown value "none" for header ":results"
22985 low   Unknown value "never-export" for header ":eval"

Thanks for this very useful tool!

Thanks,
Andreas