forest/cli/subcommands/
config_cmd.rs

1// Copyright 2019-2026 ChainSafe Systems
2// SPDX-License-Identifier: Apache-2.0, MIT
3
4use std::io::Write;
5
6use anyhow::Context as _;
7use clap::Subcommand;
8
9use crate::{cli::subcommands::Config, rpc};
10
11#[derive(Debug, Subcommand)]
12pub enum ConfigCommands {
13    /// Dump default configuration to standard output
14    Dump,
15}
16
17impl ConfigCommands {
18    pub async fn run(self, _: rpc::Client) -> anyhow::Result<()> {
19        self.run_internal(&mut std::io::stdout())
20    }
21
22    fn run_internal<W: Write + Unpin>(self, sink: &mut W) -> anyhow::Result<()> {
23        match self {
24            Self::Dump => writeln!(
25                sink,
26                "{}",
27                toml::to_string(&Config::default())
28                    .context("Could not convert configuration to TOML format")?
29            )
30            .context("Failed to write the configuration"),
31        }
32    }
33}
34
35#[cfg(test)]
36mod tests {
37    use super::*;
38
39    #[tokio::test]
40    async fn given_default_configuration_should_print_valid_toml() {
41        let expected_config = Config::default();
42        let mut sink = std::io::BufWriter::new(Vec::new());
43
44        ConfigCommands::Dump.run_internal(&mut sink).unwrap();
45
46        let actual_config: Config = toml::from_str(std::str::from_utf8(sink.buffer()).unwrap())
47            .expect("Invalid configuration!");
48
49        assert_eq!(expected_config, actual_config);
50    }
51}
forest/cli/subcommands/config_cmd.rs

forest/cli/subcommands/
config_cmd.rs
