core/services/cacache/src/config.rs

// Licensed to the Apache Software Foundation (ASF) under one
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// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
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// specific language governing permissions and limitations
// under the License.

use serde::Deserialize;
use serde::Serialize;

use super::backend::CacacheBuilder;

/// cacache service support.
#[derive(Default, Debug, Serialize, Deserialize, Clone, PartialEq, Eq)]
pub struct CacacheConfig {
    /// That path to the cacache data directory.
    pub datadir: Option<String>,
}

impl opendal_core::Configurator for CacacheConfig {
    type Builder = CacacheBuilder;
    fn from_uri(uri: &opendal_core::OperatorUri) -> opendal_core::Result<Self> {
        let mut map = uri.options().clone();

        if let Some(root) = uri.root() {
            if !root.is_empty() {
                map.entry("datadir".to_string())
                    .or_insert_with(|| format!("/{root}"));
            }
        }

        Self::from_iter(map)
    }

    fn into_builder(self) -> Self::Builder {
        CacacheBuilder { config: self }
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use opendal_core::Configurator;
    use opendal_core::OperatorUri;

    #[test]
    fn from_uri_sets_datadir_from_authority() {
        let uri = OperatorUri::new(
            "cacache:///var/cache/opendal",
            Vec::<(String, String)>::new(),
        )
        .unwrap();

        let cfg = CacacheConfig::from_uri(&uri).unwrap();
        assert_eq!(cfg.datadir.as_deref(), Some("/var/cache/opendal"));
    }

    #[test]
    fn from_uri_falls_back_to_path() {
        let uri = OperatorUri::new("cacache:///tmp/cache", Vec::<(String, String)>::new()).unwrap();

        let cfg = CacacheConfig::from_uri(&uri).unwrap();
        assert_eq!(cfg.datadir.as_deref(), Some("/tmp/cache"));
    }
}