STreaming ARchives: stricter, verifiable, deterministic, highly compressible alternatives to CAR files for atproto repositories.
atproto
car
handle empty MSTs
+23
-6
+21
-4
src/examples/car-to-star.rs
+21
-4
src/examples/car-to-star.rs
···
49
49
50
50
let repo_commit: RepoCommit = serde_ipld_dagcbor::from_slice(commit_bytes)?;
51
51
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+
let root_bytes = blocks
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+
.get(&repo_commit.data)
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+
.context("repo data cannot be null")?;
55
+
let root_node: RepoMstNode =
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+
serde_ipld_dagcbor::from_slice(root_bytes).context("root must be an mst node")?;
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+
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+
let star_data = if root_node.l.is_none() && root_node.e.is_empty() {
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+
None
60
+
} else {
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+
Some(repo_commit.data)
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+
};
63
+
52
64
let star_commit = StarCommit {
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65
did: repo_commit.did,
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66
version: repo_commit.version,
55
-
data: Some(repo_commit.data),
67
+
data: star_data,
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68
rev: repo_commit.rev,
57
69
prev: repo_commit.prev,
58
70
sig: repo_commit.sig,
···
62
74
63
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serializer.write_header(&star_commit)?;
64
76
println!("wrote header. Root: {}", repo_commit.data);
65
-
println!("writing tree...");
66
-
let (nodes, records) = write_tree(repo_commit.data, &blocks, &mut serializer)?;
67
-
println!("wrote {nodes} nodes and {records} records.");
77
+
78
+
if let Some(root_cid) = star_commit.data {
79
+
println!("writing tree...");
80
+
let (nodes, records) = write_tree(root_cid, &blocks, &mut serializer)?;
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+
println!("wrote {nodes} nodes and {records} records.");
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+
} else {
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+
println!("empty MST, no tree written.");
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+
}
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serializer.finish()?;
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println!("Done!");
+2
-2
src/examples/star-debug.rs
+2
-2
src/examples/star-debug.rs
···
24
24
println!(" Root: {:?}", c.data);
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25
}
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26
StarItem::Node(n) => {
27
-
// print_node(&n);
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+
print_node(&n);
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28
}
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StarItem::Record { key, cid, .. } => {
30
-
// println!(" Record: key={}, cid={}", to_hex(&key), cid);
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+
println!(" Record: key={}, cid={}", to_hex(&key), cid);
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31
}
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}
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33
}
star-samples/empty.star
star-samples/empty.star
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