ensure libre2-{{ soversion }} is not co-installable for different s…

…oversions

because any new soversion (which is validated also by the pkg-config check)
will then have a non-overlapping constraint for the allowed re2-version

recipe/meta.yaml

@@ -4,6 +4,8 @@
 # see https://github.com/google/re2/blob/2023-06-01/CMakeLists.txt#L32-L34
 # changes more rarely than version
 {% set soversion = "11" %}
+# if you change the soversion, you MUST update the below to avoid broken metadata
+{% set soversion_last_updated = "2023.06.02" %}
 
 package:
   name: re2-split
@@ -91,8 +93,12 @@ outputs:
         - {{ compiler('cxx') }}
       host:
         - libabseil
-      run_constrained:
-        - re2 {{ version }} *_{{ PKG_BUILDNUM }}
+      run:
+        # keep expanding the valid range until the soversion gets bumped;
+        # this is a run-dep (not just a constraint) to avoid that different
+        # libre2-{X,Y} builds can be co-installed (because any new soversion
+        # will then have a non-overlapping range for the allowed re2-version)
+        - re2 >={{ soversion_last_updated }},<={{ dotversion }}
     test:
       commands:
         # presence of versioned shared lib (unix) & plain dll (win)