hg-core: add Operation interface for high-level hg operations
A distinction is made between operations and commands.
An operation is a high-level function of mercurial whereas a command is what is exposed by the cli.
A single command can use several operations to achieve its goal.
Differential Revision: https://phab.mercurial-scm.org/D8608
--- a/rust/hg-core/src/lib.rs Mon Jun 15 18:26:40 2020 +0200
+++ b/rust/hg-core/src/lib.rs Fri Jun 05 08:46:35 2020 +0200
@@ -23,6 +23,7 @@
pub mod matchers;
pub mod revlog;
pub use revlog::*;
+pub mod operations;
pub mod utils;
// Remove this to see (potential) non-artificial compile failures. MacOS
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/rust/hg-core/src/operations/mod.rs Fri Jun 05 08:46:35 2020 +0200
@@ -0,0 +1,9 @@
+/// An interface for high-level hg operations.
+///
+/// A distinction is made between operation and commands.
+/// An operation is what can be done whereas a command is what is exposed by
+/// the cli. A single command can use several operations to achieve its goal.
+pub trait Operation<T> {
+ type Error;
+ fn run(&self) -> Result<T, Self::Error>;
+}