Illustrate how reading the config from a file might operate.feature/declarative-config

3 files changed, 14 insertions, 2 deletions

diff --git a/setup.py b/setup.py
index f5fe244..84747da 100644
--- a/setup.py
+++ b/setup.py
@@ -113,6 +113,7 @@ arguments = dict(
         "Topic :: System :: Software Distribution",
         "Topic :: Utilities",
     ],
+    install_requires=["toml"],
     python_requires=">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*",
 )
 
diff --git a/src/setuptools_scm/config.py b/src/setuptools_scm/config.py
index e69d8fe..20e97b3 100644
--- a/src/setuptools_scm/config.py
+++ b/src/setuptools_scm/config.py
@@ -107,8 +107,12 @@ class Configuration(object):
         self._tag_regex = _check_tag_regex(value)
 
     @classmethod
-    def from_file(cls):
+    def from_file(cls, name='pyproject.toml'):
         """
         Read Configuration from pyproject.toml (or similar)
         """
-        # stubbed
+        with open(name) as strm:
+            defn = __import__('toml').load(strm)
+        config = cls()
+        vars(config).update(defn.get('setuptools_scm', {}))
+        return config
diff --git a/testing/test_config.py b/testing/test_config.py
index eadbaf3..742605e 100644
--- a/testing/test_config.py
+++ b/testing/test_config.py
@@ -18,3 +18,10 @@ def test_tag_regex(tag, expected_version):
     match = config.tag_regex.match(tag)
     version = match.group("version")
     assert version == expected_version
+
+
+def test_config_from_pyproject(tmpdir):
+    fn = tmpdir / 'pyproject.toml'
+    fn.write_text('[setuptools_scm]\nenabled = true\n', encoding='utf-8')
+    config = Configuration.from_file(str(fn))
+    assert config.enabled