%ansible_collection_url: Don't require control macros

Reimplement %ansible_collection_url to accept the collection namespace
and name as arguments instead of requiring oblique control macros. This
also adds some basic tests to ensure that the macro behaves properly.

ansible-packaging.spec

@@ -77,6 +77,57 @@ install -Dpm0644 -t %{buildroot}%{_rpmmacrodir}  macros.ansible-srpm
 install -Dpm0755 -t %{buildroot}%{_rpmconfigdir} ansible-generator
 install -Dpm0755 -t %{buildroot}%{_rpmconfigdir} ansible_collection.py
 
+%check
+# TODO: Currently, this only tests %%{ansible_collection_url}.
+
+rpm_eval() {
+    default_macros_path="$(rpm --showrc | grep 'Macro path' | awk -F ': ' '{print $2}')"
+    rpm --macros="${default_macros_path}:%{buildroot}%{_rpmmacrodir}/macros.*" "$@"
+}
+
+errors() {
+    error="error: %%ansible_collection_url: You must pass the collection namespace as the first arg and the collection name as the second"
+    "$@" && exit 1
+    "$@" |& grep -q "${error}"
+}
+
+echo "Ensure macro fails when only collection_namespace macro is defined"
+errors rpm_eval -D 'collection_namespace cc' -E '%%ansible_collection_url'
+
+echo
+echo "Ensure macro fails when only collection_name macro is defined"
+errors rpm_eval -D 'collection_name cc' -E '%%ansible_collection_url'
+
+echo
+echo "Ensure macro fails when second argument is missing"
+errors rpm_eval -E '%%ansible_collection_url a'
+
+echo
+echo "Ensure macro fails when second argument is missing"
+errors rpm_eval -D 'collection_name b' -E '%%ansible_collection_url a'
+
+echo
+echo "Ensure macro fails when neither the control macros nor macro arguments are passed"
+errors rpm_eval -E '%%ansible_collection_url'
+
+
+echo
+echo
+echo "Ensure macro works when both arguments are passed and no control macros are set"
+[[ $(rpm_eval -E '%%ansible_collection_url community general') == \
+    "https://galaxy.ansible.com/community/general" ]]
+
+echo
+echo "Ensure macro works with the control macros"
+[[ $(rpm_eval -D 'collection_namespace ansible' -D 'collection_name posix' \
+    -E '%%ansible_collection_url') == "https://galaxy.ansible.com/ansible/posix" ]]
+
+echo
+echo "Ensure macro prefers the collection namespace and name passed as an argument over the control macros"
+[[ $(rpm_eval -D 'collection_namespace ansible' -D 'collection_name posix' \
+    -E '%%ansible_collection_url community general') == "https://galaxy.ansible.com/community/general" ]]
+
+
 
 %files
 %license COPYING

macros.ansible-srpm

@@ -1 +1,25 @@
-%ansible_collection_url() https://galaxy.ansible.com/%{collection_namespace}/%{collection_name}
+# Note(gotmax23): I'm trying to get rid of the need for control macros in favor
+# of a metadata based approach. %%ansible_collection_url is the only macro that
+# requires manually specifying the collection namespace and name, as it is used
+# at the SRPM build stage.
+#
+# Currently, this macro supports either passing this information as arguments
+# or defining the control macros. In order to reduce confusion, this is not an
+# either or approach. Both arguments must be passed OR both control macros must
+# be defined.
+
+%ansible_collection_url() %{lua:
+    local namespace_name = nil
+    if rpm.expand("%collection_namespace") ~= "%collection_namespace"
+            and rpm.expand("%collection_name") ~= "%collection_name" then
+        namespace_name = rpm.expand("%collection_namespace") .. "/" .. rpm.expand("%collection_name")
+    end
+    if rpm.expand("%1") ~= "%1" and rpm.expand("%2") ~= "%2" then
+        namespace_name = rpm.expand("%1") .. "/" .. rpm.expand("%2")
+    end
+    if not namespace_name then
+        rpm.expand("%{error:%%ansible_collection_url: You must pass the collection " ..
+            "namespace as the first arg and the collection name as the second}")
+    end
+    print("https://galaxy.ansible.com/" .. namespace_name)
+}