add header to simple tex formatter

PyTeX/format/enums.py

@@ -111,6 +111,7 @@ class FormatterProperty(MacroReplacementAtomIF, Enum):
     pytex_dirty = 'pytex_dirty'
     tex_type = 'tex_type'
     tex_flavour = 'latex_flavour'
+    description = 'description'
 
 
 class Argument(MacroReplacementAtomIF, Enum):

PyTeX/format/pytex_formatter.py

@@ -152,7 +152,8 @@ class PyTeXFormatter(FormatterIF, ABC):
             FormatterProperty.pytex_dirty.value: self.git_version_info.pytex_version.dirty,
             FormatterProperty.tex_type.value: self.config.tex_type.value,
             FormatterProperty.tex_flavour.value: self.config.tex_flavour.value,
-            FormatterProperty.file_prefix.value: self.file_prefix
+            FormatterProperty.file_prefix.value: self.file_prefix,
+            FormatterProperty.description.value: self.config.description
         }
 
     @property

PyTeX/format/simple_tex_formatter.py

@@ -2,7 +2,7 @@ from .formatting_config import FormattingConfig
 from .tex_formatter import TexFormatter
 from pathlib import Path
 from typing import Optional, List, Tuple, Dict
-from .enums import TeXFlavour, TeXType
+from .enums import TeXFlavour, TeXType, FormatterProperty
 
 
 class SimpleTeXFormatter(TexFormatter):
@@ -35,3 +35,26 @@ class SimpleTeXFormatter(TexFormatter):
             return '' if raw == '' else raw + '%'
         else:
             return line.rstrip()
+
+    def format_post_header(self) -> None:
+        if self.config.tex_flavour == TeXFlavour.LaTeX2e:
+            self._shipout_line(
+                r'\Provides%s{%s}[%s - %s]'
+                % (
+                    self.config.tex_type.value.capitalize(),
+                    self.name,
+                    self.attribute_dict[FormatterProperty.date.value],
+                    self.attribute_dict[FormatterProperty.description.value]
+                )
+            )
+        else:
+            self._shipout_line(
+                r'\ProvidesExpl%s{%s}{%s}{%s}{%s}'
+                % (
+                    self.config.tex_type.value.capitalize(),
+                    self.name,
+                    self.config.version,
+                    self.attribute_dict[FormatterProperty.date.value],
+                    self.config.description
+                )
+            )