Implement "glob:" directive for declarative "data_files" option.

3 files changed, 68 insertions, 2 deletions

diff --git a/docs/userguide/declarative_config.rst b/docs/userguide/declarative_config.rst
index 128d9f97..dcab0b3a 100644
--- a/docs/userguide/declarative_config.rst
+++ b/docs/userguide/declarative_config.rst
@@ -68,6 +68,7 @@ boilerplate code in some cases.
         site.d/00_default.conf
         host.d/00_default.conf
     data = data/img/logo.png, data/svg/icon.svg
+    fonts = glob: data/fonts/*.ttf, glob: data/fonts/*.otf
 
 Metadata and options are set in the config sections of the same name.
 
@@ -156,6 +157,8 @@ Special directives:
       The ``file:`` directive is sandboxed and won't reach anything outside
       the directory containing ``setup.py``.
 
+* ``glob:`` - Value will be treated as a glob() pattern and expanded accordingly.
+
 
 Metadata
 --------
@@ -225,7 +228,7 @@ package_data             section                                              [#
 exclude_package_data     section
 namespace_packages       list-comma
 py_modules               list-comma
-data_files               dict                                 40.6.0
+data_files               glob:, dict                          40.6.0
 =======================  ===================================  =============== =========
 
 **Notes**:
diff --git a/setuptools/config.py b/setuptools/config.py
index 44de7cf5..47109dad 100644
--- a/setuptools/config.py
+++ b/setuptools/config.py
@@ -9,6 +9,7 @@ import importlib
 from collections import defaultdict
 from functools import partial
 from functools import wraps
+from glob import iglob
 import contextlib
 
 from distutils.errors import DistutilsOptionError, DistutilsFileError
@@ -256,6 +257,33 @@ class ConfigHandler:
         return [chunk.strip() for chunk in value if chunk.strip()]
 
     @classmethod
+    def _parse_list_glob(cls, value, separator=','):
+        """Equivalent to _parse_list() but expands 'glob:' directives using glob().
+
+        However, unlike glob(), the resolved results stay relative paths.
+
+        :param value:
+        :param separator: List items separator character.
+        :rtype: list
+        """
+        directive = 'glob:'
+        values = cls._parse_list(value, separator=separator)
+        expanded_values = []
+        for value in values:
+            trimmed_value = value.strip()
+            if trimmed_value.startswith(directive):
+                # take what is after "glob:"
+                value = trimmed_value.split(directive, 1)[-1].strip()
+                value = os.path.abspath(value)
+                # and expand it while keeping as a relative path:
+                value = sorted(os.path.relpath(path, os.getcwd()) for path in iglob(value))
+                expanded_values.extend(value)
+            else:
+                expanded_values.append(value)
+
+        return expanded_values
+
+    @classmethod
     def _parse_dict(cls, value):
         """Represents value as a dict.
 
@@ -711,5 +739,5 @@ class ConfigOptionsHandler(ConfigHandler):
 
         :param dict section_options:
         """
-        parsed = self._parse_section_to_dict(section_options, self._parse_list)
+        parsed = self._parse_section_to_dict(section_options, self._parse_list_glob)
         self['data_files'] = [(k, v) for k, v in parsed.items()]
diff --git a/setuptools/tests/test_config.py b/setuptools/tests/test_config.py
index 21f1becd..c86c8573 100644
--- a/setuptools/tests/test_config.py
+++ b/setuptools/tests/test_config.py
@@ -893,6 +893,41 @@ class TestOptions:
             ]
             assert sorted(dist.data_files) == sorted(expected)
 
+    def test_data_files_globby(self, tmpdir):
+        fake_env(
+            tmpdir,
+            '[options.data_files]\n'
+            'cfg =\n'
+            '      a/b.conf\n'
+            '      c/d.conf\n'
+            'data = glob: *.dat\n'
+            'icons = \n'
+            '      glob: *.ico\n'
+            'audio = \n'
+            '      glob:*.wav\n'
+            '      sounds.db\n'
+        )
+
+        # Create dummy files for glob()'s sake:
+        tmpdir.join('a.dat').write('')
+        tmpdir.join('b.dat').write('')
+        tmpdir.join('c.dat').write('')
+        tmpdir.join('a.ico').write('')
+        tmpdir.join('b.ico').write('')
+        tmpdir.join('c.ico').write('')
+        tmpdir.join('beep.wav').write('')
+        tmpdir.join('boop.wav').write('')
+        tmpdir.join('sounds.db').write('')
+
+        with get_dist(tmpdir) as dist:
+            expected = [
+                ('cfg', ['a/b.conf', 'c/d.conf']),
+                ('data', ['a.dat', 'b.dat', 'c.dat']),
+                ('icons', ['a.ico', 'b.ico', 'c.ico']),
+                ('audio', ['beep.wav', 'boop.wav', 'sounds.db']),
+            ]
+            assert sorted(dist.data_files) == sorted(expected)
+
     def test_python_requires_simple(self, tmpdir):
         fake_env(
             tmpdir,