# HG changeset patch
# User Antoine Cezar <antoine.cezar@octobus.net>
# Date 2020-06-22 09:49:35
# Node ID bacf6c7ef01bcddb3e918377b47a824e904fbeab
# Parent  cf04f62d1579bed3781f2ee14673360ebc477199

rhg: add Command trait for subcommands implemented by rhg

Normalizes the interface of the cli's commands

Differential Revision: https://phab.mercurial-scm.org/D8611

Differential Revision: https://phab.mercurial-scm.org/D8648

diff --git a/rust/rhg/src/commands.rs b/rust/rhg/src/commands.rs
new file mode 100644
--- /dev/null
+++ b/rust/rhg/src/commands.rs
@@ -0,0 +1,8 @@
+use crate::error::CommandError;
+
+/// The common trait for rhg commands
+///
+/// Normalize the interface of the commands provided by rhg
+pub trait Command {
+    fn run(&self) -> Result<(), CommandError>;
+}
diff --git a/rust/rhg/src/error.rs b/rust/rhg/src/error.rs
new file mode 100644
--- /dev/null
+++ b/rust/rhg/src/error.rs
@@ -0,0 +1,3 @@
+/// The error type for the Command trait
+#[derive(Debug, PartialEq)]
+pub struct CommandError {}
diff --git a/rust/rhg/src/main.rs b/rust/rhg/src/main.rs
--- a/rust/rhg/src/main.rs
+++ b/rust/rhg/src/main.rs
@@ -1,3 +1,5 @@
+mod commands;
+mod error;
 mod exitcode;
 
 fn main() {