revset: raise RepoLookupError to make present() predicate continue the query Before this patch, "bookmark()", "named()" and "tag()" predicates raise "Abort", when the specified pattern doesn't match against existing ones. This prevents "present()" predicate from continuing the query, because it only catches "RepoLookupError". This patch raises "RepoLookupError" instead of "Abort", to make "present()" predicate continue the query, even if "bookmark()", "named()" or "tag()" in the sub-query of it are aborted. This patch doesn't contain raising "RepoLookupError" for "re:" pattern in "tag()", because "tag()" treats it differently from others. Actions of each predicates at failure of pattern matching can be summarized as below: predicate "literal:" "re:" ---------- ----------- ------------ bookmark abort abort named abort abort tag abort continue (*1) branch abort continue (*2) ---------- ----------- ------------ "tag()" may have to abort in the (*1) case for similarity, but this change may break backward compatibility of existing revset queries. It seems to have to be changed on "default" branch (with "BC" ?). On the other hand, (*2) seems to be reasonable, even though it breaks similarity, because "branch()" in this case doesn't check exact existence of branches, but does pick up revisions of which branch matches against the pattern. This patch also adds tests for "branch()" to clarify behavior around "present()" of similar predicates, even though this patch doesn't change "branch()".