misc: listfiles: improve argument passing, simplify it and make it more robust

macros.fedora-misc

@@ -1,15 +1,21 @@
 # Some miscellaneous Fedora-related macros
 
 # List files matching inclusion globs, excluding files matching exclusion blogs
-# Parameters:
-#  -i "<globs>" include shell globs (also takes all other macro arguments)
-#  -x "<globs>" exclude shell globs
+# Optional parameters:
+#  – -i "<globs>" inclusion globs
+#  – -x "<globs>" exclusion globs
+# Globs are space-separated lists of shell globs. Such lists require %{quote:}
+# use for safe rpm argument passing.
+# Alternatively, set the following rpm variables before calling the macro:
+#  – “listfiles_include” inclusion globs
+#  — “listfiles_exclude” exclusion globs
+# Arguments passed to the macro without flags will be interpreted as inclusion
+# globs.
 %listfiles(i:x:) %{expand:
-while IFS= read -r -d $'\\n' finc ; do
-  printf "%s\\n" %{?-x*} \\
-    | xargs -i realpath --relative-base=. '{}' \\
-    | grep "${finc}" >/dev/null || echo "${finc}"
-done <<< $(printf "%s\\n" %{?-i*} %* | xargs -i realpath --relative-base=. '{}' | sort -u)
+while IFS= read -r finc ; do
+  realpath -qe --relative-base=. "" %{?-x*} %{?listfiles_exclude} \\
+    | sort -u | grep -q "${finc}" || echo "${finc}"
+done <<< $(realpath -e --relative-base=. %{?-i*} %{?listfiles_include} %* | sort -u)
 }
 
 # https://github.com/rpm-software-management/rpm/issues/581