Refactor matchpats and walk Move core match function code to util Add some comments and whitespace Simplify options Use lambdas instead of always and never

Fix some line wrapping manifest hash: 43af5dafa55e01f89727096f4d6784317f3eb0d6

Merge from BOS manifest hash: 2276dbd96bb4221e579c871a1de2403c92c85659

Split make_file back out into make_filename and make_file. It turns out that make_filename is useful by itself.

If the argument to make_file can act like a file, return it. This is useful for code that calls command functions, but doesn't want to send I/O through the filesystem.

Merge with Matt's tip.

Update tests to reflect walk changes.

An empty .hgignore file must cause us to ignore nothing, not everything!

Update docs for annotate and diff.

Convert annotate over to walk interface. Add emptyok parameter to walk and matchpats, for commands that require at least one name.