Method new

fendermint/testing/materializer/src/docker/mod.rs:182–208

Create a materializer with a directory where all the testnets can live next to each other.

(dir: &Path, seed: u64)

    /// Create a materializer with a directory where all the
    /// testnets can live next to each other.
    pub fn new(dir: &Path, seed: u64) -> anyhow::Result<Self> {
        let docker =
            Docker::connect_with_local_defaults().context("failed to connect to Docker")?;

        // Create a runtime for the execution of drop tasks.
        let (drop_handle, drop_chute) = dropper::start(docker.clone());

        // Read in the state if it exists, otherwise create a default one.
        let state = import_json(dir.join(STATE_JSON_FILE_NAME))
            .context("failed to read state")?
            .unwrap_or_default();

        let m = Self {
            dir: dir.into(),
            rng: StdRng::seed_from_u64(seed),
            docker,
            drop_handle,
            drop_chute,
            state,
            drop_policy: DropPolicy::default(),
        };

        m.save_state().context("failed to save state")?;
        m.export_scripts().context("failed to export scripts")?;

        Ok(m)
    }

    pub fn with_policy(mut self, policy: DropPolicy) -> Self {
        self.drop_policy = policy;