Build a universal Python wheel instead of per-python-version ones. Fixes #2210

pkg/pip/build.sh

@@ -93,7 +93,7 @@ echo recursive-include pgadmin4 \* > pip-build/MANIFEST.in
 # Run the build
 echo Building wheel...
 cd pip-build
-python ../pkg/pip/setup_pip.py bdist_wheel
+python ../pkg/pip/setup_pip.py bdist_wheel --universal
 cd ../
 
 # Get the build

pkg/pip/setup_pip.py

@@ -24,6 +24,12 @@ with open(req_file) as reqf:
     else:
         required = reqf.read().decode("utf-8").splitlines()
 
+# Remove any requirements with environment specifiers. These
+# must be explicitly listed in extras_require below.
+for req in required:
+    if ";" in req:
+        required.remove(req)
+
 # Get the app version
 modl = imp.load_source('APP_VERSION', '../web/config.py')
 
@@ -70,7 +76,11 @@ setup(
 
     install_requires=required,
 
-    ##extras_require=,
+    extras_require={
+        # ...
+        ":python_version<'2.7'": ["ordereddict"],
+        ":python_version<='2.7'": ["importlib"],
+    },
 
     # Specify date files to be included. For Python 2.6 need to include them in MANIFEST.in
     ##package_data="",

requirements.txt

@@ -1,3 +1,6 @@
+# NOTE: Any requirements with environment specifiers must be explicitly added
+#       to pkg/pip/setup_pip.py (in extras_require), otherwise they will be
+#       ignored when building a PIP Wheel.
 Babel==1.3
 beautifulsoup4==4.4.1
 blinker==1.3