release pygments lexers (#29)

Dockerfile

@@ -47,6 +47,11 @@ RUN apt-get update &&\
 && \
     rm -rf /var/lib/apt/lists/*
 
+# install custom pygments lexers
+WORKDIR /usr/local/lib/python3.8/dist-packages/pygments/lexers
+COPY pygments-lexers/* .
+RUN python3 _mapping.py
+
 # minted expects "python" in PATH (not "python3")
 # without this, things like autogobble with \inputminted break
 # https://github.com/alexpovel/latex-extras-docker/blob/5429a82ef415c2e9eda0c20f71e7df63b51621e9/Dockerfile#L80-L87

README.md

@@ -68,5 +68,11 @@ This container can generate a `synctex.gz` file for you. Because all of the path
 
 In order to use this feature, you need to set the environment variable `HOST_PATH` to the same folder you bound `/latex` to. (the part before the colon). If you don't set this variable, a synctex file will still be generated but it won't be usable by your editor (wrong contents/paths. You can use the option specified above disable synctex generation completely.
 
+### Custom pygments lexers
+This repo supports registering additional pygments lexers (the "renderers" for the LaTeX package `minted`) at build time. These can be refered to by any one of their aliases listed below. (e.g. `\begin{minted}{custom-regex}`)
+| name           | description                                                                                                                      | aliases        |
+| -------------- | -------------------------------------------------------------------------------------------------------------------------------- | -------------- |
+| `custom-regex` | A lexer for highlighting regular expressions. (ps: don't confuse this with the `RegexLexer` base class for all pygments lexers.) | `custom-regex` |
+
 ## Contributing
 If you have any questions, feature requests or LaTeX package suggestions, feel free to open an issue here on GitHub.

pygments-lexers/custom_regex_lexer.py

@@ -0,0 +1,32 @@
+# Custom lexer for regex snippets
+# This file is based on a blog entry by Lukas Matt.
+# https://blog.matt.wf/regex-lexer-for-pygments/
+# It has been modified to be more versatile
+from pygments.lexer import RegexLexer, bygroups
+from pygments.token import *
+
+__all__ = ['CustomRegexLexer']
+
+class CustomRegexLexer(RegexLexer):
+    name = 'custom-regex'
+    aliases = ['custom-regex']
+    filenames = []
+
+    tokens = {
+        'root': [
+            (r'=', Text),
+            (r'\w+', Name),
+            (r'\d+', Number),
+            (r'[\s\,\:\-\"\']+', Text),
+            (r'[\$\^]', Token),
+            (r'[\+\*\.\?]', Operator),
+            (r'(\()([\?\<\>\!\=\:]{2,3}.+?)(\))', bygroups(Keyword.Namespace, Name.Function, Keyword.Namespace)),
+            (r'(\()(\?\#.+?)(\))', bygroups(Comment, Comment, Comment)),
+            (r'[\(\)]', Keyword.Namespace),
+            (r'[\[\]]', Name.Class),
+            (r'\\\w', Keyword),
+            (r'[\{\}]', Operator),
+            (r'\\\.', Text),
+            (r'\|', Operator),
+        ],
+    }