config: Get repository directory from config file.

One less thing users have to fiddle with to get set up.

conservancy_beancount/config.py

@@ -27,6 +27,7 @@ import rt
 
 from pathlib import Path
 from typing import (
+    Mapping,
     NamedTuple,
     Optional,
     Tuple,
@@ -81,6 +82,7 @@ class Config:
 
     def __init__(self) -> None:
         self.file_config = configparser.ConfigParser()
+        self.file_config.read_string("[Beancount]\n")
 
     def load_file(self, config_path: Optional[Path]=None) -> None:
         if config_path is None:
@@ -91,6 +93,17 @@ class Config:
     def load_string(self, config_str: str) -> None:
         self.file_config.read_string(config_str)
 
+    def _abspath(self, source: Mapping[str, str], key: str) -> Optional[Path]:
+        try:
+            retval = Path(source[key])
+        except (KeyError, ValueError):
+            ok = False
+        else:
+            if source is not os.environ:
+                retval = retval.expanduser()
+            ok = retval.is_absolute()
+        return retval if ok else None
+
     def _dir_or_none(self, path: Path) -> Optional[Path]:
         try:
             path.mkdir(exist_ok=True)
@@ -100,14 +113,8 @@ class Config:
             return path
 
     def _path_from_environ(self, key: str, default: Optional[Path]=None) -> Path:
-        try:
-            retval = Path(os.environ[key])
-        except (KeyError, ValueError):
-            ok = False
-        else:
-            # Per the spec, non-absolute paths should be ignored.
-            ok = retval.is_absolute()
-        if not ok:
+        retval = self._abspath(os.environ, key)
+        if retval is None:
             retval = default or (Path.home() / self._ENVIRON_DEFAULT_PATHS[key])
         return retval
 
@@ -119,13 +126,7 @@ class Config:
             return books.Loader(books_path, self.fiscal_year_begin())
 
     def books_path(self) -> Optional[Path]:
-        try:
-            retval = Path(self.file_config['Beancount']['books dir']).expanduser()
-        except (KeyError, ValueError):
-            ok = False
-        else:
-            ok = retval.is_absolute()
-        return retval if ok else None
+        return self._abspath(self.file_config['Beancount'], 'books dir')
 
     def cache_dir_path(self, name: str='conservancy_beancount') -> Optional[Path]:
         cache_root = self._path_from_environ('XDG_CACHE_HOME')
@@ -163,10 +164,10 @@ class Config:
             return decimal.Decimal(10)
 
     def repository_path(self) -> Optional[Path]:
-        try:
-            return Path(os.environ['CONSERVANCY_REPOSITORY'])
-        except (KeyError, ValueError):
-            return None
+        retval = self._abspath(self.file_config['Beancount'], 'repository dir')
+        if retval is None:
+            retval = self._abspath(os.environ, 'CONSERVANCY_REPOSITORY')
+        return retval
 
     def rt_credentials(self) -> RTCredentials:
         all_creds = zip(

setup.py

@@ -5,7 +5,7 @@ from setuptools import setup
 setup(
     name='conservancy_beancount',
     description="Plugin, library, and reports for reading Conservancy's books",
-    version='1.2.1',
+    version='1.2.2',
     author='Software Freedom Conservancy',
     author_email='info@sfconservancy.org',
     license='GNU AGPLv3+',

tests/test_config.py

@@ -86,6 +86,19 @@ def update_umask(mask):
     finally:
         os.umask(old_mask)
 
+def test_repository_from_file():
+    path_s = '/home/good'
+    with update_environ(CONSERVANCY_REPOSITORY='bad'):
+        config = config_mod.Config()
+        config.load_string(f"[Beancount]\nrepository dir = {path_s}\n")
+        assert config.repository_path() == Path(path_s)
+
+def test_repository_expands_user():
+    path_s = 'tilderepo'
+    config = config_mod.Config()
+    config.load_string(f"[Beancount]\nrepository dir = ~/{path_s}\n")
+    assert config.repository_path() == Path.home() / path_s
+
 def test_repository_from_environment():
     config = config_mod.Config()
     assert config.repository_path() == testutil.test_path('repository')