CHANGES

Version 0.18
------------
(released on July 6, 2014)

- Pybtex is now fully case-insensitive (like BibTeX). As a consequence, IEEEtran styles now work corretly.

- Added ``--preserve-case`` optoin to ``pybtex-convert`` (by default all identifiers are converted to lower case).

- An erorr is reported if two citations have the same key but different case, like in BibTeX. (Example: ddt1999 and DDT1999).

- Fixed parsing unused bibliography entries with strings containing @ characters.

- ``entry.max$`` constant is now set to 250, ``global.max$`` is set to 20000, like in BibTeX.

- Added ``--strict`` option to ``pybtex-convert`` and ``pybtex-format`` (turns
  warning to errors).

- Strict mode is now enabled by default when using pybtex as a library
  (exceptions are raised on all errors instead of just printing warnings to
  stderr).

  Non-strict error handling is still enabled when using pybtex from the command
  line, for compatibility with BibTeX. Use ``--strict`` option if you don't
  like this.

- Added missing pybtex-format manpage.


Version 0.17
------------
(released on March 10, 2014)

- Added ``pybtex-format`` utility for formatting bibliography files as HTML,
  LaTeX, and other supported human-readable formats.

- Added ``--strict`` command line option to ``pybtex`` (all warnings become errors).

- Added ``alpha`` label style, and alpha and unsrtalpha formatting styles.

- Added support for ``url``, ``eprint``, ``doi``, and ``pubmed`` fields in ``unsrt`` style.

- Names with hyphens are now abbreviated correctly ("Jean-Baptiste" becomes "J.-B.").

- ``width$`` now uses cmr10 font metrics, like in BibTeX. Non-latin characters are also supported.

- Pythonic style engine now supports ``@preamble`` commands.

- Warning on missing fields are now more human-readable.

- When writing BibTeX files, put entry key on the same line with entry type. Fixes warnings in Jabref.

- When using multiple ``.bib`` files, macros defined in earlier files are available in subsequent ones (like in BibTeX).

- Fixed parsing ``.bst`` files with lines consisting of a single % character.

- Fixed sorting entries without author in ``author_year_title`` sorting style.

- Fixed broken ``CaseInsensitiveDict.get()``.

- ``CaseInsensitiveDict`` is now pickleable.

- Added support for registering plugins at runtime with
  ``pybtex.plugin.register_plugin()`` - useful for using pybtex as a library.

Many thanks to Matthias C. M. Troffaes for his numerous fixes and improvements!


Version 0.16
------------
(released on March 17, 2012)

- BibTeX ``.bib`` and ``.bst`` parsers were completely rewritten. They are now
  much faster and more BibTeX-compatible.

- Syntax errors and undefined strings in ``.bib`` files now result in warnings
  instead of errors, like in BibTeX.

- Unused entries in ``.bib`` files are now skipped, like in BibTeX.

- The case of entry keys is now preserved (in previous versions they were
  converted to lowercase).

- Pythonic style engine now supports sorting.

- Pythonic style engine: fixed nested optional() blocks.

- Fixed parsing of some names with a Last part but no von part.

- Fixed processing of brace-level-one "special characters" in ``purify$`` BibTeX
  built-in function.

- Added proper error messages on encoding errors in .bib files.

- The default encoding is now UTF-8 on all platforms.

- ``pybtex-convert`` now preserves the order of entries in BibTeX and BibTeXML
  files.


The following changes were contributed by Matthias C. M. Troffaes:

- Fixed first_of behavior when non-empty child is followed by a child that has a
  missing field.

- Fixed crossref lookups when key is not lower case.

- Completed unsrt and plain python styles: they now contain all entry types.

- Added doctree backend for rendering into a tree of docutils nodes.

- Added support for non-string backends.



Version 0.15
------------
(released on February 1, 2011)

- Changed license from GPL-3 to MIT.

- Added support for `setuptools plugins <plugins.txt>`_.

- BibTeX parser: fixed whitespace normalization in concatenated strings.

- BibTeX parser: when parsing multiple BibTeX files, macros defined in
  earlier files are now available to all subsequent files, like in BibTeX.

- BibTeX ``.bst`` interpreter now prints warnings on missing entries, like
  BibTeX, instead of raising a ``KeyError``.

- ``call.type$`` BibTeX built-in function now uses ``default.entry`` for
  unknown entry types, like in BibTeX.

- ``substring$`` now accepts start=0 and returns an empty string.

- ``change.case$``: fixed incorrect formatting of strings starting with special
  characters with "t" format.

- Fixed abbreviation of names starting with special characters or
  non-alphabetic characters.

- Fixed incorrect entry order and duplicated entries with ``\nocite{*}``.

- Added more detailed error messages for already defined variables in ``.bst``
  files.


Version 0.14.1
--------------
(released on September 30, 2010)

- Added missing custom_fixers directory to the tarball - needed only for
  converting the sources to Python 3.


Version 0.14
------------
(released on September 20, 2010)

- BibTeX writer: fixed quoting ``"`` (double quote) characters.

- BibTeX parser now produces human-readable error messages on unread macros.

- Added error messages on missing data in .aux files.

- Improved performance on very long name lists.

- Added support for Python 3.


Version 0.13.2
--------------
(released on February 26, 2010)

- BibTeX parser: fixed a bug with parsing strings containing braces, like "Error in {DNA}".


Version 0.13.1
--------------
(released on February 18, 2010)

- Fixed ``ImportError: No module named kpathsea`` errors. One of the source files
  was missing from ``pybtex-0.13.tar.bz2`` for some strange reason. Sorry about that. ;)


Version 0.13
------------
(released on February 14, 2010)

- Implemented `--min-crossrefs` option.

- All command line options of the original BibTeX are not supported.

- Pybtex now respects `BSTINPUTS`, `BIBINPUTS` and `TEXMFOUTPUT` environment
  variables.

- BibTeX bibliography parser now strips excessive whitespace from fields, like
  BibTeX does.


Version 0.12
------------
(released on November 21, 2009)

- Pybtex now works correctly with ``\input{filename}`` in LaTeX files.

- Added a proper ``change.case$`` BibTeX function instead of a stub.

- Added ``-e``/``--encoding`` command line option.

- Fixed non-working ``--bibtex-encoding`` option.

- Added proper error messages on missing plugins, file IO errors, some BibTeX
  interpreter errors, etc.

- Fallback to backslash-encoding when printing messages to the console - to
  make them printable regardless of the locale.


Version 0.11
------------
(released on September 7, 2009)

- Made ``text.lentgh$`` and ``text.prefix$`` BibTeX built-in functions treat
  braces and TeX special characters properly (like the original BibTeX
  functions do).

- Changed ``purify$`` to replace ties and hyphens by spaces.

- Fixed a bug in ``substring$`` with negative start values.

- Fixed .bst file grammar to allow underscores in identifiers.

- BibTeX name parser: ties are now treated as whitespace when splitting name
  parts.

- Implemented BibTeX-like text wrapping - the resulting .bbl output should now
  be byte-for-byte identical to that of BibTeX in most cases.


Version 0.10
------------
(released on August 24, 2009)

- Added support for multiple bibliography databases.

- Pythonic bibliography formatter: added helper functions to simplify writing
  BibTeX-like name formatting styles in Python. Added a tool for automatic
  conversion of BibTeX ``{ll}{, ff}``-like patterns into Python.

- BibTeX parser: added missing characters to the caracter set of the valid
  identifiers.

- BibTeX parser: a comma is now allowed between the last field and the closing
  brace.

- BibTeX name parser: when splitting name parts into words, whitespace at brace
  level > 0 is now ignored.

- BibTeX name parser: fixed parsing of single-word lowercase names and complex
  von names, like in "Andrea de Leeuw van Weenen".

- Fixed broken ``--label-style`` and ``--name-style`` options.

- Added (autogenerated) manpages.

- Added this changelog.


Version 0.9
-----------
(released on August 17, 2009)

- Implemented ``\citation{*}``.  

- Implemented crossrefs.

- BibTeX .bib parser now supports newlines inside strings.

- Fixed: .bib filename from .aux file was ignored.

- Fixed incorrect argument passing to codecs.open().

- Fixed incorrect whitespace handling in the name parsing code.


Version 20090402
----------------
(released on February 04, 2009)

- Fixed yet more encoding-related bugs.

- Cleaned up some old nasty code, updated the documentation, added more tests.


Version 20080918
----------------
(released on September 18, 2008)

- Added HTML backend. The pythonic bibliography formatter can now produce LaTeX,
  HTML, and plaintext.

- BibTeXML writer now indents the resulting XML.

- Removed the dependency on external elementtree.

- Improved the interface of the ``pybtex-convert`` script. It is just
  ``convert foo.bib foo.yaml`` now.

- Fixed several bugs in the BibTeX interpreter.

- Fixed several encoding-related bugs.


Version 20070513
----------------
(released on May 13, 2007)

- Added an interpreter for the BibTeX stack language. Pybtex now supports
  BibTeX style files.

- Added a YAML bibliography format (both input and output).

- Improved processing of names with {braces}.

- Added support for ``@preamble`` to both BibTeX parser and writer.

- Introduced an experimental pythonic template language to make bibliography
  formatting easier with a more functional-oriented approach.

- Added support for incollection entries to the experimentl pythonic bibliography
  style.

- cElementTree is now used for BibTeXML parsing, if present.

- Added some documentation files (finally).


Version 20060416
----------------
(released on April 16, 2006)

- Added BibTeX and BibTeXML formatters for bibliography databases. Added a
  database conversion tool.

- Improved name splitting in the BibTeX parser.

- Locale encoding is now used by default.

- Added ``richtext.Check`` class to simplify formatting of optional bibliography
  fields.

- Added support for booklet and inbook entry types to the experimentl pythonic
  bibliography style.


Version 20060402
----------------
(released on April 2, 2006)

- Added initial Unicode support and input/output encodings.

- Introduced output backends to make bibliography styles markup-independent.
  Added LaTeX and Plaintext backends.

- Improved BibTeXML parser, add support for pre-parsed names (``<bibtex:first>``,
  ``<bibtex:middle>`` and so on).

- Added default macros for month names to the BibTeX parser.

- Added an experimental ``richtext.Phrase`` (former ``Pack`` class (former
  ``Packer`` class)) class to make creating sentences and delimited lists
  easier.

- Added experimental support for pluggable name and label styles to the
  pythonic bibliogrphy formatter.

- Made Pybtex work on Windows by renaming aux.py to auxfile.py. Duh.


Version 0.1
-----------
(released on March 4, 2006)

Initial release. This version already has a basic BibTeX .bib parser, BibTeXML
parser and a proof-of-concept pythonic bibliography formatter.