add docstrip formatter

PyTeX/format/docstrip_formatter.py

@@ -0,0 +1,53 @@
+import tempfile
+
+from .enums import TeXType
+from .formatting_config import FormattingConfig
+from .pytex_formatter import PyTeXFormatter
+from pathlib import Path
+import subprocess
+import shutil
+
+from typing import List, Tuple
+
+
+class DocStripFormatter(PyTeXFormatter):
+    def output_files(self) -> List[str]:
+        if self.config.tex_out_type == TeXType.TeXClass:
+            return self.name + '.cls'
+        elif self.config.tex_out_type == TeXType.TeXClass:
+            return self.name + '.sty'
+        else:
+            raise NotImplementedError
+
+    def format(self, build_dir: Path, overwrite: bool = False) -> List[Tuple[str, FormattingConfig]]:
+        tmp_dir: Path = Path(tempfile.mkdtemp())
+        shutil.copy(
+            self.input_file,
+            tmp_dir
+        )
+        if self.input_file.with_suffix('.ins').exists():
+            result = subprocess.run(
+                ['tex', self.input_file.with_suffix('.ins').name],
+                cwd=tmp_dir,
+                stderr=subprocess.STDOUT
+            )
+            if not result.returncode == 0:
+                raise NotImplementedError
+        else:
+            result = subprocess.run(
+                ['pdflatex', self.input_file.name],
+                cwd=tmp_dir,
+                stderr=subprocess.STDOUT
+            )
+            if not result.returncode == 0:
+                raise NotImplementedError
+        for file in self.output_files():
+            outfile = tmp_dir / file
+            if not outfile.exists():
+                raise NotImplementedError
+            shutil.copy(outfile, build_dir)
+        shutil.rmtree(tmp_dir)
+        return []  # No future config
+
+    def dependencies(self) -> List[str]:
+        return []  # TODO