ENH: Timestamp development versions.

This adds a timestamp to development versions of NumPy. We used to do
this for NumPy nightly builds so that pip would pickup the latest
version, but pip 20.3 breaks with that as there is disagreement between
the wheel name and the internal version.

Closes #17885.

1 files changed, 4 insertions, 1 deletions

diff --git a/setup.py b/setup.py
index 4d0ded925..326d34e7a 100755
--- a/setup.py
+++ b/setup.py
@@ -130,7 +130,10 @@ def get_version_info():
         GIT_REVISION = "Unknown"
 
     if not ISRELEASED:
-        FULLVERSION += '.dev0+' + GIT_REVISION[:7]
+        import time
+
+        time_stamp = time.strftime("%Y%m%d%H%M%S", time.localtime())
+        FULLVERSION += f'.dev0+{time_stamp}_{GIT_REVISION[:7]}'
 
     return FULLVERSION, GIT_REVISION