OBS: better download of source egg

Unfortunately, pip download is no good at downloading only. It always want to instal the egg which is not feasible (see this issue https://github.com/pypa/pip/issues/1884).

Fixup for 6e5b4d76

obs/slapos/prepare_download_cache.sh

@@ -52,8 +52,9 @@ do
   package=${f%%-*}
   version=${f#*-}
   version=${version%%-*}
-  echo "Fetching $package at version $version"
-  pip download --no-binary :all: $package==$version
+  url=$(python3 $CURRENT_DIRECTORY/pypi_download.py $package $version)
+  echo "Fetching $package at version $version (at $url)"
+  wget $url
   rm $f
 done
 cd -

obs/slapos/pypi_download.py

+#!/usr/bin/python3
+
+from pypi_simple import PyPISimple
+import argparse
+parser = argparse.ArgumentParser()
+parser.add_argument("egg")
+parser.add_argument("version")
+args = parser.parse_args()
+
+
+
+with PyPISimple() as client:
+  page = client.get_project_page(args.egg)
+  for pkg in page.packages:
+    #print(pkg.version)
+    #print(pkg)
+    if pkg.version == args.version and pkg.package_type == 'sdist':
+      print(pkg.url)
+      exit()
+
+