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Joined 1 year ago
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Cake day: July 9th, 2023

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  • Regarding Cargo.lock, the recommendation always was to include it in version control for application/binary crates, but not library ones. But tendencies changed over time to include it even for libraries. If a rust-toolchain file is tracked by version control, and is pinned to a specific stable release, then Cargo.lock should definitely be tracked too [1][2].

    It’s strictly more information tracked, so there is no logical reason not to include it. There was this concern about people not being aware of --locked not being the default behaviour of cargo install, giving a false sense of security/reliability/reproducibility. But “false sense” is never a good technical argument in my book.

    Anyway, your crate is an application/binary one. And if you were to not change the "*" dependency version requirement, then it is almost guaranteed that building your crate will break in the future without tracking Cargo.lock ;)



  • Here is an originally random list (using cargo tree --prefix=depth) with some very loose logical grouping. Wide-scoped and well-known crates removed (some remaining are probably still known by most).

    mime data-encoding percent-encoding textwrap unescape unicode-width scraper
    arrayvec bimap bstr enum-iterator os_str_bytes pretty_assertions paste
    clap_complete console indicatif shlex
    lz4_flex mpeg2ts roxmltree speedy
    aes base64 hex cbc sha1 sha2 rsa
    reverse_geocoder trust-dns-resolver
    signal-hook signal-hook-tokio
    blocking
    fs2
    semver
    snmalloc-rs
    

  • My quick notes which are tailored to beginners:

    Use Option::ok_or_else() and Result::map_err() instead of let .. else.

    • let .. else didn’t always exist. And you might find that some old timers are slightly triggered by it.
    • Functional style is generally preferred, as long as it doesn’t effectively become a code obfuscater, like over-using Options as iterators (yes Options are iterators).
    • Familiarize yourself with the ? operator and the Try trait

    Type inference and generic params

    let headers: HashMap = header_pairs
            .iter()
            .map(|line| line.split_once(":").unwrap())
            .map(|(k, v)| (k.trim().to_string(), v.trim().to_string()))
            .collect();
    

    (Borken sanitization will probably butcher this code, good thing the problem will be gone in Lemmy 0.19)

    Three tips here:

    1. You don’t need to annotate the type here because it can be inferred since headers will be returned as a struct field, the type of which is already known.
    2. In this pattern, you should know that you can provide the collected type as a generic param to collect() itself. That may prove useful in other scenarios.
    3. You should know that you can collect to a Result/Option if the iterator items are Results/Options. So that .unwrap() is not an ergonomic necessity 😉

    Minor point

    • Use .into() or .to_owned() for &str => String conversions.
      • Again, some pre-specialization old timers may get slightly triggered by it.

    make good use of the crate echo system

    • It’s important to make good use of the crate echo system, and talking to people is important in doing that correctly and efficiently.
      • This post is a good start.
      • More specifically, the http crate is the compatibility layer used HTTP rust implementations. Check it out and maybe incorporate it into your experimental/educational code.

    Alright, I will stop myself here.






  • Next Day Edit: Sorry. Forgot to use my Canadian Aboriginal syllabics again. Because apparently it’s too hard to admit HTML-sanitizing source markdown was wrong!

    One thing that irks me in these articles is gauging the opinion of the “Rust community” through Reddit/HN/Lemmy😉/blogs… etc. I don’t think I’d be way off the mark when I say that these platforms mostly collectively reflect the thoughts of junior Rustaceans, or non-Rustaceans experimenting with Rust, with the latter being the loudest, especially if they are struggling with it!

    And I disagree with the argument that poor standard library support is the major issue, although I myself had that thought before. It’s definitely current lack of language features that do introduce some annoyances. I do agree however that implicit coloring is not the answer (or an answer I want to ever see).

    Take this simple code I was writing today. Ideally, I would have liked to write it in functional style:

        async fn some_fn(&self) -> OptionᐸMyResᐸVecu8ᐳᐳᐳ {
            (bool_cond).then(|| async {
                // ...
                // res_op1().await?;
                // res_op2().await?;
                // ...
                Ok(bytes)
            })
        }
    

    But this of course doesn’t work because of the opaque type of the async block. Is that a serious hurdle? Obviously, it’s not:

        async fn some_fn(&self) -> OptionᐸMyResᐸVecu8ᐳᐳᐳ {
            if !bool_cond {
                return None;
            }
    
            let res = || async {
                // ...
                // res_op1()?;
                // res_op2()?;
                // ...
                Ok(bytes)
            };
    
            Some(res().await)
        }
    

    And done. A productive Rustacean is hardly wasting time on this.

    Okay, bool::then() is not the best example. I’m just show-casing that it’s current language limitations, not stdlib ones, that are behind the odd async annoyance encountered. And the solution, I would argue, does not have to come in the form of implicit coloring.



  • I would bad mouth Axum and Actix just because of the overhype. But then, the latter is powering this very platform, and the former is used in the federation crate examples 😉

    So let me just say that I tried poem and it got the job done for me. Rusty API. Decent documentation. And everything is in one crate. No books, extension crates, and towers of abstractions needed.

    I try to avoid tokio stuff in general for the same reason, although a compatible executor is unfortunately often required.


  • From your list, I use bat, exa and rg.

    delta (sometimes packaged as git-delta) deserves a mention. I use it with this git configuration:

    [core]
      # --inspect-raw-lines=false fixes issue where some added lines appear in bold blue without green background
      # default minus-style is 'normal auto'
      pager = "delta --inspect-raw-lines=false --minus-style='syntax #400000' --plus-style='syntax #004000' --minus-emph-style='normal #a00000' --plus-emph-style='normal #00a000' --line-buffer-size=48 --max-line-distance=0.8"
    
    [interactive]
      diffFilter = "delta --inspect-raw-lines=false --color-only --minus-style='syntax #400000' --plus-style='syntax #004000' --minus-emph-style='normal #a00000' --plus-emph-style='normal #00a000' --line-buffer-size=48 --max-line-distance=0.8"
    
    [delta]
      navigate = true  # use n and N to move between diff sections
      light = false    # set to true if you're in a terminal w/ a light background color (e.g. the default macOS terminal)
    
    [merge]
      conflictstyle = diff3