Add the PreCommit hook struct.

source/config/mod.rs

@@ -9,10 +9,12 @@ use {
 
 mod exit_action;
 mod general;
+mod pre_commit;
 mod task;
 
 pub use exit_action::*;
 pub use general::*;
+pub use pre_commit::*;
 pub use task::*;
 
 /// The main Hooked configuration struct.
@@ -21,6 +23,9 @@ pub use task::*;
 pub struct Config {
   /// General Hooked configuration.
   pub general: General,
+
+  /// Pre-commit hooks.
+  pub pre_commit: Vec<PreCommit>,
 }
 
 impl Config {

source/config/pre_commit.rs

@@ -0,0 +1,20 @@
+//! Pre-commit hook definitions.
+
+use serde::{Deserialize, Serialize};
+
+use crate::{ExitAction, Task};
+
+/// A pre-commit hook.
+#[derive(Debug, Deserialize, Serialize)]
+#[serde(deny_unknown_fields)]
+pub struct PreCommit {
+  /// Display name for this hook.
+  pub name: Option<String>,
+
+  /// What to do when the hook exits with a non-zero status code.
+  pub on_failure: ExitAction,
+
+  /// Task to perform when this hook is called.
+  #[serde(flatten)]
+  pub task: Task,
+}