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feat: car file to blocks #35

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feat: car file to blocks #35

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10 changes: 10 additions & 0 deletions src/cli.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -149,6 +149,9 @@ pub enum Command {
/// Construct a CAR file bytes from a list of blocks
#[cfg(feature = "ipld")]
CarFromBlocks(CarFromBlocksArgs),
/// Deconstruct a CAR into its constituent blocks
#[cfg(feature = "ipld")]
CarToBlocks(CarToBlocksArgs),

// ---------------- Libp2p Tools ----------------------------//
/// Ping a peer
Expand Down Expand Up @@ -285,6 +288,13 @@ pub struct CarFromBlocksArgs {
pub blocks: Vec<CarBlockValue>,
}

#[derive(Args, Debug, Clone)]
pub struct CarToBlocksArgs {
/// Path to save the extracted blocks (default to current directory)
#[arg(default_value = ".")]
pub blocks_dir: String,
}

#[derive(Debug, Clone)]
pub struct CarBlockValue {
pub root: bool,
Expand Down
13 changes: 11 additions & 2 deletions src/ipld.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -13,8 +13,8 @@ use tokio::io::{AsyncRead, AsyncReadExt, AsyncWrite, AsyncWriteExt};

use crate::{
cli::{
CarExtractArgs, CarFromBlocksArgs, CarInspectArgs, CidFromDataArgs, CidInspectArgs,
Command, DagCborIndexArgs,
CarExtractArgs, CarFromBlocksArgs, CarInspectArgs, CarToBlocksArgs, CidFromDataArgs,
CidInspectArgs, Command, DagCborIndexArgs,
},
random_cid,
};
Expand All @@ -33,6 +33,7 @@ pub enum Operation {
CarInspect(CarInspectArgs),
CarExtract(CarExtractArgs),
CarFromBlocks(CarFromBlocksArgs),
CarToBlocks(CarToBlocksArgs),
}

impl TryFrom<Command> for Operation {
Expand All @@ -53,6 +54,7 @@ impl TryFrom<Command> for Operation {
Command::CarInspect(args) => Ok(Operation::CarInspect(args)),
Command::CarExtract(args) => Ok(Operation::CarExtract(args)),
Command::CarFromBlocks(args) => Ok(Operation::CarFromBlocks(args)),
Command::CarToBlocks(args) => Ok(Operation::CarToBlocks(args)),
_ => Err(value),
}
}
Expand Down Expand Up @@ -231,6 +233,13 @@ pub async fn run(

stdout.write_all(&car).await?;
}
Operation::CarToBlocks(args) => {
let mut reader = CarReader::new(stdin).await?;
while let Some((cid, data)) = reader.next_block().await? {
let path = format!("{}/{}", args.blocks_dir, cid);
tokio::fs::write(path, data).await?;
}
}
};
Ok(())
}
Expand Down