Merge b1ab446 into f5b7ff6

docs/install.rst

@@ -6,7 +6,7 @@ Requirements
 ============
 
 The installation of PyScaffold only requires a recent version of `setuptools`_,
-i.e. at least version 31, as well as a working installation of `Git`_.
+i.e. at least version 38.3, as well as a working installation of `Git`_.
 Especially Windows users should make sure that the command ``git`` is available on
 the command line. Otherwise, check and update your ``PATH`` environment
 variable or run PyScaffold from the *Git Bash*.

setup.cfg

@@ -32,7 +32,7 @@ python_requires = >=3.4
 include_package_data = True
 package_dir =
     =src
-install_requires = setuptools>=31
+install_requires = setuptools>=38.3
 
 [options.packages.find]
 where = src

setup.py

@@ -27,8 +27,10 @@ def bootstrap_cfg():
     src_dir = os.path.join(__location__, 'src')
     egg_info_dir = os.path.join(__location__, 'PyScaffold.egg-info')
     has_entrypoints = os.path.isdir(egg_info_dir)
+    import pkg_resources
 
     sys.path.insert(0, src_dir)
+    pkg_resources.working_set.add_entry(src_dir)
     from pyscaffold.utils import check_setuptools_version
     from pyscaffold.contrib.setuptools_scm import get_version
     from pyscaffold.contrib.setuptools_scm.hacks import parse_pkginfo

src/pyscaffold/exceptions.py

@@ -56,7 +56,7 @@ class OldSetuptools(RuntimeError):
     """PyScaffold requires a recent version of setuptools."""
 
     DEFAULT_MESSAGE = (
-        "Your setuptools version is too old (<31). "
+        "Your setuptools version is too old (<38.3). "
         "Use `pip install -U setuptools` to upgrade.\n"
         "If you have the deprecated `distribute` package installed "
         "remove it or update to version 0.7.3.")

src/pyscaffold/templates/setup_py.template

@@ -8,8 +8,17 @@
     PyScaffold helps you to put up the scaffold of your new Python project.
     Learn more under: https://pyscaffold.org/
 """
+import sys
+
+from pkg_resources import require, VersionConflict
 from setuptools import setup
 
+try:
+    require('setuptools>=38.3')
+except VersionConflict:
+    print("Error: version of setuptools is too old (<38.3)!")
+    sys.exit(1)
+
 
 if __name__ == "__main__":
     setup(use_pyscaffold=True)

src/pyscaffold/utils.py

@@ -211,7 +211,7 @@ def check_setuptools_version():
     except ImportError:
         raise OldSetuptools
 
-    setuptools_too_old = parse_version(setuptools_ver) < parse_version('31')
+    setuptools_too_old = parse_version(setuptools_ver) < parse_version('38.3')
     setuptools_scm_check_failed = VERSION_CLASS is None
     if setuptools_too_old or setuptools_scm_check_failed:
         raise OldSetuptools