refactor: give every command we run a type of its own

src/cmd/compose.rs

@@ -0,0 +1,92 @@
+use super::{Argv, Cmd};
+
+fn compose() -> Argv {
+    Argv::new("docker").arg("compose")
+}
+
+// docker compose run --rm, which runs the image's entrypoint and so fixes up the
+// container user before handing over
+pub struct Run {
+    service: String,
+    inner: Argv,
+}
+
+impl Run {
+    pub fn wrapping(service: &str, inner: Argv) -> Self {
+        Self {
+            service: service.to_string(),
+            inner,
+        }
+    }
+}
+
+impl Cmd for Run {
+    fn argv(&self) -> Argv {
+        compose()
+            .arg("run")
+            .arg("--rm")
+            .arg(&self.service)
+            .args(self.inner.words())
+    }
+}
+
+// the merged project file, with every extends and env_file resolved
+pub struct Config;
+
+impl Cmd for Config {
+    fn argv(&self) -> Argv {
+        compose().arg("config").flag("--format", "json")
+    }
+}
+
+// the container id a service is running as, empty when it is not running
+pub struct Ps {
+    service: String,
+}
+
+impl Ps {
+    pub fn id_of(service: &str) -> Self {
+        Self {
+            service: service.to_string(),
+        }
+    }
+}
+
+impl Cmd for Ps {
+    fn argv(&self) -> Argv {
+        compose().arg("ps").arg("--quiet").arg(&self.service)
+    }
+}
+
+pub struct Up;
+
+impl Cmd for Up {
+    fn argv(&self) -> Argv {
+        compose().arg("up").arg("--detach")
+    }
+}
+
+pub struct Start {
+    service: String,
+}
+
+impl Start {
+    pub fn service(service: &str) -> Self {
+        Self {
+            service: service.to_string(),
+        }
+    }
+}
+
+impl Cmd for Start {
+    fn argv(&self) -> Argv {
+        compose().arg("start").arg(&self.service)
+    }
+}
+pub struct Stop;
+
+impl Cmd for Stop {
+    fn argv(&self) -> Argv {
+        compose().arg("stop")
+    }
+}