rust-matchers: improve `Matcher` trait ergonomics
`VisitChildrenSet` has no need to own the set, this will save allocations.
The `file_set` return type change is motivated by both ergonomics and... being
able to compile code.
The `AlwaysMatcher` does not store a `file_set`, which requires it to return an
owned `HashSet`, which in turn would change our return type to `Cow<&HgPath>`
(lifetimes omitted). This is both un-ergonomic and troublesome for more
complex lifetime issues (especially with the upcoming `FileMatcher` in the
following patch).
Differential Revision: https://phab.mercurial-scm.org/D7525
[package]
name = "chg"
version = "0.1.0"
authors = ["Yuya Nishihara <yuya@tcha.org>"]
description = "Client for Mercurial command server with cHg extension"
license = "GPL-2.0+"
[dependencies]
bytes = "0.4"
futures = "0.1"
libc = "0.2"
log = { version = "0.4", features = ["std"] }
tokio = "0.1"
tokio-hglib = "0.2"
# TODO: "^0.2.3" once released. we need AsRawFd support.
tokio-process = { git = "https://github.com/alexcrichton/tokio-process" }
tokio-timer = "0.2"
[build-dependencies]
cc = "1.0"