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https://github.com/plandes/bibstract

BibTex Composition Based on (La)Tex References
https://github.com/plandes/bibstract

bibtex latex tex

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BibTex Composition Based on (La)Tex References

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# BibTeX Extract and Populate

[![PyPI][pypi-badge]][pypi-link]
[![Python 3.13][python313-badge]][python313-link]
[![Build Status][build-badge]][build-link]

This utility extracts [BibTeX] references (a.k.a *markers*) from a [(La)TeX]
file and copies entries from a source, which the *master BibTeX file*. It also
provides easy customization to massage the entries of the BibTeX files (see
[features](#features)). The use case is exporting all [BetterBibtex] entries
to a file on your file system, usually one that is updated as you add, remove
and modify papers in [Zotero]. While the use case was intended for use with
Zoter and BetterBibtex, it will work on any BibTeX system.

The program does the following:
1. Parses some large master source BibTeX file.
1. Parses a file or recursively all `.tex`, `.sty`, and `.cls` files
recursively in a directory.
1. Copies the matching entries from the master source BibTeX to standard out.

The program makes the assumption that the BibTeX entry IDs are unique as the
matches are very loose when parsing the (La)TeX file.

## Features

Many features relate to modifying older entries to accommodate newer systems
(i.e. [BibLATEX]) or modifying newer entries to accommodate older systems
(i.e. [BibTex]).

Features:
* Replace or edit Unicode characters, which is useful when
`\usepackage[utf8]{inputenc}` has no effect.
* Massage date strings.
* Remove certain entries that cause bibliography systems issues (useful for
[BibLATEX]).
* Modify entries to normalize [arXiv] entries.

## Obtaining

The easiest way to install the command line program is via the `pip` installer:
```bash
pip3 install zensols.bibstract
```

Binaries are also available on [pypi].

## Usage

This is a command line program written that has the following usage (also use
`--help`):

* Print IDs in a master source file BibTeX file: `bibstract showbib`.
* Print cite references in a (La)TeX file: `bibstract showtex `
* Print IDs that will be exported from the BibTeX file: `bibstract showexport `
* Export the matching entries to standard out: `bibstract export `

## Converters

A set of *converters* can be specified in the [configuration file], which
modify each parsed BibTeX entry in succession. Currently there the following:
* **date_year**: Converts the year part of a date field to a year. This is
useful when using Zotero's Better Biblatex extension that produces BibLatex
formats, but you need BibTeX entries.
* **copy**: Copy or move one or more fields in the entry. This is useful when
your bibliography style expects one key, but the output (i.e.BibLatex)
outputs a different named field). When `destructive` is set to ``True``, this
copy operation becomes a move.

Converters can be set be set and configured in the [configuration file]. See
the [test cases](tests) for more examples.

## Configuration

A [configuration file] must be given, whose location is either given with a
`-c` command line argument, or set in the environment variable `BIBSTRACTRC`.

An example [configuration file] is available, which has only one INI section
`default` with option `master_bib` with the master BibTeX file.

### Example Configuration File

The following example configuration file points to the a home directory file
where you tell where [BetterBibtex] to export. It then specifies to convert
dates with years (deleting the `date` field after)when creating the output.

In addition, it copies the `journaltitle` (exported by [BetterBibtex]) to
`journal`, which is used by BibTeX. This converter, called *replace* is
configured the `replace_converter` entry.

```ini
[default]
master_bib = ${env:home}/.zotero-betterbib.bib
converters = date_year_destructive, replace

[replace_converter]
class_name = zensols.bibstract.CopyOrMoveConverter
fields = dict: {'journaltitle': 'journal'}
destructive = False
```

## Documentation

See the [full documentation](https://plandes.github.io/bibstract/index.html).
The [API reference](https://plandes.github.io/bibstract/api.html) is also
available.

## Changelog

An extensive changelog is available [here](CHANGELOG.md).

## Community

Please star this repository and let me know how and where you use this API.
[Contributions](CONTRIBUTING.md) as pull requests, feedback, and any input is
welcome.

## License

[MIT License](LICENSE.md)

Copyright (c) 2020 - 2026 Paul Landes

[pypi]: https://pypi.org/project/zensols.bibstract/
[pypi-link]: https://pypi.python.org/pypi/zensols.bibstract
[pypi-badge]: https://img.shields.io/pypi/v/zensols.bibstract.svg
[python313-badge]: https://img.shields.io/badge/python-3.13-blue.svg
[python313-link]: https://www.python.org/downloads/release/python-3130
[build-badge]: https://github.com/plandes/bibstract/workflows/CI/badge.svg
[build-link]: https://github.com/plandes/bibstract/actions

[configuration file]: #example-configuration-file
[BetterBibtex]: https://github.com/retorquere/zotero-better-bibtex
[Zotero]: https://www.zotero.org
[BibTeX]: http://www.bibtex.org
[BibLATEX]: https://ctan.org/pkg/biblatex?lang=en
[(La)TeX]: http://www.bibtex.org
[arXiv]: https://arxiv.org