implement simple tex formatter

PyTeX/format/formatterif.py

@@ -1,10 +1,11 @@
 from pathlib import Path
 from typing import List, Optional, Dict, Tuple
+from abc import ABC, abstractmethod
 
 from .config import Config
 
 
-class FormatterIF:
+class FormatterIF(ABC):
     """
     A formatter is bound to a specific input file with some
     building configuration.
@@ -18,6 +19,7 @@ class FormatterIF:
         self._input_file: Optional[Path] = input_file
         self._config: Optional[Config] = config
 
+    @abstractmethod
     def format(self, build_dir: Path, overwrite: bool = False) -> Optional[List[Tuple[str, Dict]]]:
         """
         :param build_dir: Directory where output files are written to
@@ -26,15 +28,21 @@ class FormatterIF:
         build of the output files, a list of the file names and their
         needed configurations. Else None.
         """
-        raise NotImplementedError
 
+    @abstractmethod
     @property
     def output_files(self) -> List[str]:
         """
 
         :return: List of files that will be built when the formatter is invoked
         """
-        raise NotImplementedError
+
+    @abstractmethod
+    @property
+    def dependencies(self) -> List[str]:
+        """
+        :return: List of dependencies (as str filenames)
+        """
 
     @property
     def input_file(self) -> Path:
@@ -55,7 +63,3 @@ class FormatterIF:
     @config.setter
     def config(self, config: Config):
         self._config = config
-
-    @property
-    def dependencies(self) -> List[str]:
-        raise NotImplementedError

PyTeX/format/pytex_formatter.py

@@ -8,9 +8,10 @@ from .formatterif import FormatterIF
 from .formatting_config import FormattingConfig
 from .generic_text import GenericText
 from ..logger import logger
+from abc import ABC, abstractmethod
 
 
-class PyTeXFormatter(FormatterIF):
+class PyTeXFormatter(FormatterIF, ABC):
     def __init__(
             self,
             input_file: Optional[Path] = None,

PyTeX/format/simple_tex_formatter.py

@@ -1,5 +1,24 @@
 from .tex_formatter import TexFormatter
+from pathlib import Path
+from typing import Optional, List, Tuple, Dict
 
 
 class SimpleTeXFormatter(TexFormatter):
+    def open_output_stream(self, build_dir: Path):
+        out_file = build_dir / self.input_file.with_suffix('').name
+        if out_file.exists():
+            raise NotImplementedError
+        else:
+            self._output_file = out_file.open()
+
+    def close_output_stream(self):
+        self._output_file.close()
+
+    def future_config(self) -> Optional[List[Tuple[str, Dict]]]:
         pass
+
+    def dependencies(self) -> List[str]:
+        return []
+
+    def output_files(self) -> List[str]:
+        return []

PyTeX/format/tex_formatter.py

@@ -1,5 +1,6 @@
 from pathlib import Path
 from typing import List, TextIO, Optional, Tuple, Dict
+from abc import ABC, abstractmethod
 
 from .macros import Macro
 from .pytex_formatter import PyTeXFormatter
@@ -52,13 +53,35 @@ class LineStream:
         return self._file_exhausted & len(self._cached_lines) == 0
 
 
-class TexFormatter(PyTeXFormatter):
+class TexFormatter(PyTeXFormatter, ABC):
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self._macros: List[Macro] = []
         self._line_stream: Optional[LineStream] = None
         self._output_file: Optional[TextIO] = None
 
+    @abstractmethod
+    def open_output_stream(self, build_dir: Path) -> None:
+        """
+
+        :param build_dir: Where to open output stream
+        """
+
+    @abstractmethod
+    def close_output_stream(self) -> None:
+        """
+
+        :return:
+        """
+
+    @abstractmethod
+    @property
+    def future_config(self) -> Optional[List[Tuple[str, Dict]]]:
+        """
+        # TODO
+        :return:
+        """
+
     @property
     def line_stream(self) -> LineStream:
         if self._line_stream is None:
@@ -89,16 +112,6 @@ class TexFormatter(PyTeXFormatter):
             raise NotImplementedError
         self._output_file.write(line)
 
-    def open_output_stream(self):
-        raise NotImplementedError
-
-    def close_output_stream(self):
-        raise NotImplementedError
-
-    @property
-    def future_config(self) -> Optional[List[Tuple[str, Dict]]]:
-        raise NotImplementedError
-
     def format_pre_header(self) -> None:
         pass
 
@@ -123,7 +136,7 @@ class TexFormatter(PyTeXFormatter):
             self._shipout_line()
 
     def format(self, build_dir: Path, overwrite: bool = False) -> Optional[List[Tuple[str, Dict]]]:
-        self.open_output_stream()
+        self.open_output_stream(build_dir)
         self.format_pre_header()
         self.format_header()
         self.format_post_header()