Fix source distribution so it does not depend on eccodeslib (#141)

Author: iainrussell

.github/workflows/cd.yml

@@ -24,5 +24,12 @@ jobs:
   pypi:
     needs: [wheel-windows]
     uses: ecmwf/reusable-workflows/.github/workflows/cd-pypi.yml@v2
+    with:
+      env_vars: |
+        {
+          "DEPEND_ON_ECCODESLIB": "1"
+        }
+      buildargs: --no-isolation
     secrets: inherit
+    
 

setup.py

@@ -17,6 +17,8 @@
 
 import setuptools
 
+binary = os.getenv("DEPEND_ON_ECCODESLIB", "") == "1"
+
 
 def read(path):
     file_path = os.path.join(os.path.dirname(__file__), *path.split("/"))
@@ -90,9 +92,14 @@ def shared(directory):
     "attrs",
     "cffi",
     "findlibs",
-    "eccodeslib;platform_system!='Windows'",
 ]
 
+# only add eccodeslib as dependency if building a distribution that should depend on it
+if binary:
+    install_requires += [
+        "eccodeslib;platform_system!='Windows'",
+    ]
+
 setuptools.setup(
     name="eccodes",
     version=parse_version_from("gribapi/bindings.py"),