Add processor Docker tests

Adds tests/docker for code common to Docker-based tests.

tests/docker/src/lib.rs

@@ -0,0 +1,45 @@
+use std::{
+  sync::{Mutex, OnceLock},
+  collections::HashMap,
+  env,
+};
+
+static BUILT: OnceLock<Mutex<HashMap<String, bool>>> = OnceLock::new();
+pub fn build(name: String) {
+  let built = BUILT.get_or_init(|| Mutex::new(HashMap::new()));
+  // Only one call to build will acquire this lock
+  let mut built_lock = built.lock().unwrap();
+  if built_lock.contains_key(&name) {
+    // If it was built, return
+    return;
+  }
+
+  // Else, hold the lock while we build
+  let mut path = env::current_exe().unwrap();
+  path.pop();
+  assert!(path.as_path().ends_with("deps"));
+  path.pop();
+  assert!(path.as_path().ends_with("debug"));
+  path.pop();
+  assert!(path.as_path().ends_with("target"));
+  path.pop();
+  path.push("deploy");
+
+  println!("Building {}...", &name);
+
+  assert!(std::process::Command::new("docker")
+    .current_dir(path)
+    .arg("compose")
+    .arg("build")
+    .arg(&name)
+    .spawn()
+    .unwrap()
+    .wait()
+    .unwrap()
+    .success());
+
+  println!("Built!");
+
+  // Set built
+  built_lock.insert(name, true);
+}