Bundle the build dependencies to re-enable source builds. Fixes #980.

Author: jaraco

.gitignore

@@ -13,4 +13,4 @@ setuptools.egg-info
 *.swp
 *~
 .hg*
-requirements.txt
+build-deps.txt

MANIFEST.in

@@ -12,3 +12,4 @@ include launcher.c
 include msvc-build-launcher.cmd
 include pytest.ini
 include tox.ini
+include build-deps.zip

bootstrap.py

@@ -89,16 +89,20 @@ def install_deps():
         shutil.rmtree(tmpdir)
 
 
+def bundle_deps():
+    """
+    Generate 'build-deps.zip'
+    """
+    gen_deps()
+    with install_deps() as dir:
+        shutil.make_archive('build-deps', 'zip', dir)
+    os.remove('requirements.txt')
+
+
 def main():
+    bundle_deps()
     ensure_egg_info()
-    gen_deps()
-    try:
-        # first assume dependencies are present
-        run_egg_info()
-    except Exception:
-        # but if that fails, try again with dependencies just in time
-        with install_deps():
-            run_egg_info()
+    run_egg_info()
 
 
 __name__ == '__main__' and main()

setup.py

@@ -12,6 +12,8 @@
 
 here = os.path.dirname(__file__)
 
+sys.path.append('build-deps.zip')
+
 
 def require_metadata():
     "Prevent improper installs without necessary metadata. See #659"