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"No such file or directory" error after Cargo cache is deleted #26

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laniakea64 opened this issue Apr 5, 2024 · 2 comments · May be fixed by #27
Open

"No such file or directory" error after Cargo cache is deleted #26

laniakea64 opened this issue Apr 5, 2024 · 2 comments · May be fixed by #27

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@laniakea64
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When the cache at $CARGO_HOME/registry has been deleted, using cargo-dl for any crate gives this error -

$ cargo dl cargo-dl
Error: could not acquire cargo-dl

Caused by:
    No such file or directory (os error 2)

Workaround: I have cargo-information installed, and after running cargo info on any crate, e.g. cargo info serde (does not need to be related to the crate to download), cargo-dl works again.

I'm using cargo-dl version 0.1.4 installed from crates.io.

Is it possible for cargo-dl to work with deleted cache?

Thanks 🙂
@Nemo157
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Nemo157 commented Apr 6, 2024

Testing with debug logs:

> CARGO_DL_LOG=debug CARGO_HOME=$(mktemp -d) cargo dl cargo-dl
                                cargo-dl ⠉ querying index for cargo-dl                                                                                                                                                                                                            2024-04-06T16:20:47.334252Z DEBUG ureq::stream: connecting to index.crates.io:443 at [2600:9000:225a:d600:1f:a9f5:69c0:93a1]:443
    at crates.io/ureq-2.7.1/src/stream.rs:384

  2024-04-06T16:20:47.345774Z DEBUG rustls::client::hs: No cached session for DnsName("index.crates.io")
    at crates.io/rustls-0.21.6/src/client/hs.rs:73

  2024-04-06T16:20:47.345868Z DEBUG rustls::client::hs: Not resuming any session
    at crates.io/rustls-0.21.6/src/client/hs.rs:132

  2024-04-06T16:20:47.355191Z DEBUG rustls::client::hs: Using ciphersuite TLS13_AES_128_GCM_SHA256
    at crates.io/rustls-0.21.6/src/client/hs.rs:615

  2024-04-06T16:20:47.355224Z DEBUG rustls::client::tls13: Not resuming
    at crates.io/rustls-0.21.6/src/client/tls13.rs:142

  2024-04-06T16:20:47.355359Z DEBUG rustls::client::tls13: TLS1.3 encrypted extensions: [ServerNameAck]
    at crates.io/rustls-0.21.6/src/client/tls13.rs:381

  2024-04-06T16:20:47.355382Z DEBUG rustls::client::hs: ALPN protocol is None
    at crates.io/rustls-0.21.6/src/client/hs.rs:472

  2024-04-06T16:20:47.357054Z DEBUG ureq::stream: created stream: Stream(RustlsStream)
    at crates.io/ureq-2.7.1/src/stream.rs:199

  2024-04-06T16:20:47.357080Z DEBUG ureq::unit: sending request GET https://index.crates.io/ca/rg/cargo-dl
    at crates.io/ureq-2.7.1/src/unit.rs:261

  2024-04-06T16:20:47.357128Z DEBUG ureq::unit: writing prelude: GET /ca/rg/cargo-dl HTTP/1.1
Host: index.crates.io
cargo-protocol: version=1
accept: text/plain
accept-encoding: gzip,identity
User-Agent: cargo-dl/0.1.4
    at crates.io/ureq-2.7.1/src/unit.rs:480

  2024-04-06T16:20:47.368554Z DEBUG ureq::response: Chunked body in response
    at crates.io/ureq-2.7.1/src/response.rs:375

  2024-04-06T16:20:47.368657Z DEBUG ureq::unit: response 200 to GET https://index.crates.io/ca/rg/cargo-dl
    at crates.io/ureq-2.7.1/src/unit.rs:314

  2024-04-06T16:20:47.369000Z DEBUG ureq::stream: dropping stream: Stream(RustlsStream)
    at crates.io/ureq-2.7.1/src/stream.rs:319

                                cargo-dl ⠉ selecting version                                                                                                                                                                                                                      2024-04-06T16:20:47.371374Z DEBUG cargo_dl: all available versions: ["0.1.0", "0.1.1", "0.1.2", "0.1.3", "0.1.4"]
    at src/main.rs:177

  2024-04-06T16:20:47.371428Z DEBUG cargo_dl: matching versions: ["0.1.4", "0.1.3", "0.1.2", "0.1.1", "0.1.0"]
    at src/main.rs:204

                                cargo-dl ⠙ checking cache for cargo-dl 0.1.4                                                                                                                                                                                                      2024-04-06T16:20:47.371620Z DEBUG cargo_dl::cache: failed finding cached file for cargo-dl@0.1.4 in registry sparse+https://index.crates.io/

Caused by:
    0: finding cache dir for registry sparse+https://index.crates.io/
    1: cache dir /tmp/tmp.AUkiNeCyMp/registry/cache/index.crates.io-6f17d22bba15001f does not exist
    at src/cache.rs:88

  2024-04-06T16:20:47.371680Z DEBUG cargo_dl::cache: failed finding cached file for cargo-dl@0.1.4 in registry https://github.com/rust-lang/crates.io-index

Caused by:
    0: finding cache dir for registry https://github.com/rust-lang/crates.io-index
    1: cache dir /tmp/tmp.AUkiNeCyMp/registry/cache/github.com-1ecc6299db9ec823 does not exist
    at src/cache.rs:88

  2024-04-06T16:20:47.371710Z DEBUG cargo_dl: failed finding cached file for cargo-dl@0.1.4 in registries ["sparse+https://index.crates.io/", "https://github.com/rust-lang/crates.io-index"]
    at src/main.rs:283

Error: could not acquire cargo-dl

Caused by:
    No such file or directory (os error 2)

So it successfully does a query direct to the sparse index to detect which version, sees it's not available in the cache, but then fails.

With some extra local debugging the failure comes from index.index_config() when trying to lookup the download url, the file that must exist is $CARGO_HOME/registry/index/index.crates.io-6f17d22bba15001f/config.json:

cargo-dl/src/main.rs

Line 283 in ff0fc92

let url = version.download_url(&index.index_config()?).context("missing download url")?;

There doesn't appear to be any way to do a query of the config from the remote with crates-index if it doesn't exist, I'll open an upstream issue about it and probably try to prepare a PR adding it.

This was referenced Apr 6, 2024
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@laniakea64
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Thanks for investigating!

Since your PR to crates-index has been merged and released, I have been testing #27 patch to src/main.rs with using latest crates.io version of crates-index. Can confirm it fixes this issue 🎉

Any update on including this in cargo-dl?

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wip: Download index config Nemo157/cargo-dl
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@Nemo157 @laniakea64