Compiles the 'lpeg' library (Parsing Expression Grammars For Lua) into
the program.
Package maintainers may choose to rely on package dependencies to make
lpeg available, in which case they can compile the with the constraint
`lpeg +rely-on-shared-lpeg-library`.
This fixes issues with
- misleading error messages when a required function parameter is
omitted;
- absent properties still being listed in the output of `pairs`; and
- alias accessing leading to errors instead of returning `nil`, e.g.
with `(pandoc.Str '').identifier`.
Fixes: #7661
See also: #7657
- Specify local scope for highlight_styles; prevents global namespace pollution when sourcing completion from a file rather than adding `eval "$(pandoc --bash-completion)"` to .bashrc
- Add argument completion for --print-highlight-style, --eol, and --markdown-headings
This is just a small improvement in terms of performance,
but it's simpler and more direct code.
Also, we avoid parsing interparagraph spaces in balanced
brackets, as the original did.
This ensures that when `SOURCE_DATE_EPOCH` is set, the
modification times of files taken from the reference.docx will
be set deterministically, allowing for reproducible builds.
Closes#7654.
Comparisons of Citation values are performed in Haskell; values are
equal if they represent the same Haskell value. Converting a Citation
value to a string now yields its native Haskell string representation.
E.g. "Y", "yes", which are now (with yaml library) considered
boolean values, as well as "null".
This fixes a bug with roundtripping markdown -> markdown:
```
---
foo: "true"
...
```
- For LineEnding use lowercase constructors, e.g. `crlf`, `native`.
This was the original intent, but there was a bug in the
implementation.
- For HTMLSlideVariant use lowercase constructors.
- For ReaderOptions use e.g. `default-image-extension`
instead of `readerDefaultImageExtension` for field names.
- For Extension, use e.g. `tex_math_dollars` instead of
`Ext_tex_math_dollars` as constructor.
- For Extensions, use an array of Extensions, instead of
an object wrapping the tag `Extensions` and an integer.
(The representation is not supposed to be part of the
public API.)
- For Opt, use field names like `tab-stop` instead of `optTabStop`.
Reasons:
- Performance: HsYAML is around 20 times slower in parsing
large YAML bibliographies (#6084).
- An issue was submitted to HsYAML, but it hasn't gotten
any attention. HsYAML seems borderline unmaintained; it hasn't
had a commit in over a year.
- Unfortunately this goes back on our attempts to free ourselves
from C dependencies (#4535). But I don't see a better alternative
until a better pure Haskell parser is available.
Closes#6084.
Notes:
- We've removed the FromYAML instances for all types that had
them, since this is a HsYAML-specific typeclass [API change].
(The yaml package just uses From/ToJSON.)
- Unlike HsYAML (in the configuration we were using), yaml
parses 'Y', 'N', 'Yes', 'No', 'On', 'Off' as boolean values.
Users may need to quote these when they are meant to be
interpreted as strings. Similarly, 'null' is parsed as
a YAML null value (and will be treated as an empty string
by pandoc rather than the string 'null'). Quoting it will
force it to be interpreted as a string.
- Some tests had to be adjusted accordingly.
- Pandoc now behaves better when the YAML metadata contains
escaping errors: instead of just falling back on treating
the section as a table, it raises a YAML parsing error.
