From 7796cb7e5c23b06aac9ce84245e11dd82730fbcf Mon Sep 17 00:00:00 2001
From: Mike Toews <mwtoews@gmail.com>
Date: Thu, 14 Jun 2018 15:54:39 +1200
Subject: Start a `customstyle` for bibliographic references

Modifies label to use BibTeX key name, and format names with lastfirst
---
 docs/source/bibstyle.py | 64 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 docs/source/bibstyle.py

(limited to 'docs/source/bibstyle.py')

diff --git a/docs/source/bibstyle.py b/docs/source/bibstyle.py
new file mode 100644
index 00000000..8e2cc02a
--- /dev/null
+++ b/docs/source/bibstyle.py
@@ -0,0 +1,64 @@
+###############################################################################
+#
+#  Purpose: Configure custom bibliography style for sphinxcontrib-bibtex
+#  Author:  Mike Toews <mwtoews at gmail.com>
+#
+###############################################################################
+#  Copyright (c) 2018, Mike Toews <mwtoews at gmail.com>
+#
+#  Permission is hereby granted, free of charge, to any person obtaining a
+#  copy of this software and associated documentation files (the "Software"),
+#  to deal in the Software without restriction, including without limitation
+#  the rights to use, copy, modify, merge, publish, distribute, sublicense,
+#  and/or sell copies of the Software, and to permit persons to whom the
+#  Software is furnished to do so, subject to the following conditions:
+#
+#  The above copyright notice and this permission notice shall be included
+#  in all copies or substantial portions of the Software.
+#
+#  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+#  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+#  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+#  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+#  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+#  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+#  DEALINGS IN THE SOFTWARE.
+###############################################################################
+
+import re
+from pybtex.style.formatting.unsrt import Style as UnsrtStyle
+from pybtex.style.labels.alpha import LabelStyle
+from pybtex.plugin import register_plugin
+
+
+class LinkLabelStyle(LabelStyle):
+    """Citation label used in text, and before each item in the
+    References section"""
+
+    re_char_nums = re.compile(r'^[\d\w]+$')
+
+    def format_label(self, entry):
+        """Returns BibTeX key for label
+
+        Raises KeyError if BibTeX key has other characters other than letters
+        and numbers.
+        """
+        label = entry.key
+        if not self.re_char_nums.match(label):
+            raise KeyError(
+                'BibTeX key must contain only letters and numbers '
+                '(found {0!r})'.format(label))
+        return label
+
+
+class CustomStyle(UnsrtStyle):
+    """Citation style in the References section"""
+
+    default_label_style = 'linklabel'
+    default_name_style = 'lastfirst'
+    default_sorting_style = 'author_year_title'
+    # TODO: Make more Harvard-like, i.e. year after name(s)
+
+
+register_plugin('pybtex.style.labels', 'linklabel', LinkLabelStyle)
+register_plugin('pybtex.style.formatting', 'customstyle', CustomStyle)
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