feat: add ability to specify custom command

crates/gitnow/src/custom_command.rs

@@ -0,0 +1,49 @@
+use std::path::Path;
+
+use crate::{app::App, config::Config};
+
+pub struct CustomCommand {
+    config: Config,
+}
+
+impl CustomCommand {
+    pub fn new(config: Config) -> Self {
+        Self { config }
+    }
+
+    pub async fn execute_post_update_command(&self, path: &Path) -> anyhow::Result<()> {
+        if let Some(post_update_command) = &self.config.settings.post_update_command {
+            let command_parts = post_update_command.split(' ').collect::<Vec<_>>();
+            let Some((first, rest)) = command_parts.split_first() else {
+                return Ok(());
+            };
+
+            let mut cmd = tokio::process::Command::new(first);
+            cmd.args(rest).current_dir(path);
+
+            tracing::info!(
+                path = path.display().to_string(),
+                cmd = post_update_command,
+                "running custom post update command"
+            );
+            let output = cmd.output().await?;
+            let stdout = std::str::from_utf8(&output.stdout)?;
+            tracing::info!(
+                stdout = stdout,
+                "finished running custom post update command"
+            );
+        }
+
+        Ok(())
+    }
+}
+
+pub trait CustomCommandApp {
+    fn custom_command(&self) -> CustomCommand;
+}
+
+impl CustomCommandApp for App {
+    fn custom_command(&self) -> CustomCommand {
+        CustomCommand::new(self.config.clone())
+    }
+}