OXYGENHUB

feat(web): the Diffusion mark as the diffusion account's picture (closes #154) 08e221b77658

Ripples from the Oxygen ring out to three consumers, in the mark's
gradient on the deep blue of the band; served for the account the hub runs
until someone uploads another picture for it.
Author
Andy McCall @andymccall <[email protected]>
When
· 2026-10-13 13:50 UTC
Signature
✔ signed by Andy McCall
Hash
08e221b776581dd09db3b37c9d3360be6bf420dc197b878a3581dde4d661b63d
Depends on
101740454617 a160b98fb922 b5668108487f c9aacc0e7dc1 d23464c0ac60 eb2a3502601d
Depended on by
ac689cd21adf 4fa0da126b70
In bookmarks
api-unknown-fields cancel-landed-runs diffusion-pin-bookmark draft-ready main oh-comment-body-file proposal-list-fast
In tags
v0.5.0 v0.5.1 v0.5.2 v0.6.0 v0.6.1 v0.7.0 v0.8.0 v0.9.0 v0.9.1 v0.9.11 v0.9.15 v0.9.16 v0.9.19 v0.9.2 v0.9.20 v0.9.21 v0.9.22 v0.9.23 v0.9.24 v0.9.3 v0.9.4 v0.9.5 v0.9.6 v0.9.7 v0.9.8 v0.9.9
Edits
7 atoms, 1 tree operation, 3 files

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added assets/icons/diffusion.svg +17 −0
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64" width="64" height="64">
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  <title>Diffusion</title>
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  <defs>
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    <linearGradient id="dfGrad" x1="0%" y1="0%" x2="100%" y2="100%">
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      <stop offset="0%" stop-color="#00F0FF"/>
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      <stop offset="100%" stop-color="#0072FF"/>
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    </linearGradient>
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  </defs>
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  <rect width="64" height="64" fill="#0b1a3a"/>
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  <circle cx="17" cy="32" r="7.5" fill="none" stroke="url(#dfGrad)" stroke-width="3"/>
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  <circle cx="17" cy="32" r="3" fill="#00F0FF"/>
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  <path d="M25 18.14 A16 16 0 0 1 25 45.86" fill="none" stroke="url(#dfGrad)" stroke-width="3" stroke-linecap="round" opacity=".9"/>
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  <path d="M30.5 8.62 A27 27 0 0 1 30.5 55.38" fill="none" stroke="url(#dfGrad)" stroke-width="3" stroke-linecap="round" opacity=".6"/>
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  <circle cx="45.7" cy="11.9" r="4" fill="#00F0FF"/>
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  <circle cx="52" cy="32" r="4" fill="#FFFFFF"/>
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  <circle cx="45.7" cy="52.1" r="4" fill="#0072FF"/>
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</svg>
modified CHANGELOG.md +1 −0
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## Unreleased
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- **Diffusion (#148, docs/diffusion.md).** When a repository that others pin as a subrepo moves on, each consumer that follows it gets a proposal moving the pin, signed by the hub, tested by the consumer's own pipeline, with the upstream's changes listed. One proposal per consumer and subrepo, kept up to date; never landed by itself. Turned on per repository (Settings › Diffusion, `PUT /repos/{owner}/{name}/diffusion`, or `follow` in `.oxymodules`), off by default; `green` waits for the upstream's run to pass. A repository's page shows who uses it and how far behind each is (Diffusion › Diffuses to, `GET /repos/{owner}/{name}/consumers`). Consumers are bumped on the bookmark their work lands on, learned from where their proposals land.

    

  
    

      
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- **Diffusion has a face (#154):** the `diffusion` account's picture is the Diffusion mark (`assets/icons/diffusion.svg`), ripples from a source out to its consumers, until someone uploads another.

    

  
    

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- **Diffusion in the API (#153):** `GET /repos/{owner}/{name}/diffusion` gives what a repository takes from and what it diffuses to, each with its pill, for the VS Code extension.

    

  
    

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- **Tidier pages (#152).** The repository sidebar is a column of cards with shaded headings: Diffusion in one card (Takes from and Diffuses to, each with its pill), the ten most recently moved bookmarks with a link to the rest, and the hub's delegate key shown with the OxygenHub mark. The code tree has a shaded head with the latest change and the history, and folder and file icons; the site bar has icons; the Diffusion tables share one column grid; Help › Coming from GitHub covers submodules and Renovate.

    

  
    

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- **Admin › Runners › Images (#146):** every runner image, where it is and what uses it.

    

  
    

      
      
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    modified
    crates/hub/src/web/avatar.rs
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                .into_response();

    

  
    

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        }

    

  
    

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    }

    

  
    

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    ([(header::CONTENT_TYPE, "image/svg+xml"), (header::CACHE_CONTROL, "public, max-age=300")], identicon(name)).into_response()

    

  
    

      
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    // The hub's own accounts have their marks until someone uploads another.

    

  
    

      
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    let svg = system_mark(name).map(String::from).unwrap_or_else(|| identicon(name));

    

  
    

      
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    ([(header::CONTENT_TYPE, "image/svg+xml"), (header::CACHE_CONTROL, "public, max-age=300")], svg).into_response()

    

  
    

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}

    

  
    

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/// The mark of an account the hub runs itself: Diffusion's ripples from a

    

  
    

      
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/// source out to its consumers.

    

  
    

      
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pub fn system_mark(name: &str) -> Option<&'static str> {

    

  
    

      
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    (name == crate::diffusion::ACCOUNT).then_some(include_str!("../../../../assets/icons/diffusion.svg"))

    

  
    

      
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}

    

  
    

      
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#[cfg(test)]

    

  
    

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mod tests {

    

  
    

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    use super::{identicon, process, SIZE};

    

  
    

      
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    use super::{identicon, process, system_mark, SIZE};

    

  
    

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    fn encoded(img: image::DynamicImage, format: image::ImageFormat) -> Vec<u8> {

    

  
    

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        let mut out = Vec::new();

    

  
    

      
      
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        // Larger than the side limit: refused before allocating it.

    

  
    

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        let big = encoded(image::DynamicImage::ImageLuma8(image::GrayImage::new(8001, 1)), image::ImageFormat::Png);

    

  
    

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        assert!(process(&big).is_err(), "8001 pixels wide");

    

  
    

      
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    }

    

  
    

      
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    #[test]

    

  
    

      
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    fn the_diffusion_account_has_its_mark() {

    

  
    

      
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        let m = system_mark("diffusion").expect("a mark");

    

  
    

      
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        assert!(m.starts_with("<svg") && m.contains("<title>Diffusion</title>"));

    

  
    

      
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        assert!(system_mark("andy").is_none() && system_mark("Diffusion").is_none(), "only the hub's own account, by its exact name");

    

  
    

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    }

    

  
    

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    #[test]

    

  
    

      
      
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