some work on nixcon 2022
This commit is contained in:
Jade Lovelace
Jade Lovelace
parent
7547f1477e
commit
d7bab9d001
4 changed files with 30095 additions and 11 deletions
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content/pages/nixcon2022/img/nixosClosure.svg
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content/pages/nixcon2022/img/nixosClosure.svg
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content/pages/nixcon2022/img/python3Closure.svg
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content/pages/nixcon2022/img/python3Closure.svg
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</svg>
|
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|
After Width: | Height: | Size: 22 KiB |
|
|
@ -9,6 +9,7 @@
|
|||
<link rel="stylesheet" href="dist/reset.css">
|
||||
<link rel="stylesheet" href="dist/reveal.css">
|
||||
<link rel="stylesheet" href="dist/theme/black.css">
|
||||
<link rel="stylesheet" href="styles.css">
|
||||
|
||||
<!-- Theme used for syntax highlighted code -->
|
||||
<link rel="stylesheet" href="plugin/highlight/monokai.css">
|
||||
|
|
@ -16,16 +17,145 @@
|
|||
<body>
|
||||
<div class="reveal">
|
||||
<div class="slides">
|
||||
<section>Slide 1</section>
|
||||
<section>Slide 2
|
||||
<aside class="notes">
|
||||
<p>Some notes</p>
|
||||
</aside>
|
||||
<p>Some slide text</p>
|
||||
<aside class="notes">
|
||||
<p>and some more notes</p>
|
||||
</aside>
|
||||
</section>
|
||||
<section class="title-slide">
|
||||
<h1> Debugging closure sizes graphically </h1>
|
||||
<div class="meta">
|
||||
<p>
|
||||
Jade Lovelace <jadel@mercury.com>
|
||||
</p>
|
||||
<p>
|
||||
NixCon 2022<br>
|
||||
October 20, 2022<br>
|
||||
https://jade.fyi
|
||||
</p>
|
||||
</div>
|
||||
</section>
|
||||
|
||||
<section data-markdown><textarea data-template>
|
||||
# who am I?
|
||||
* Computer Engineering student at UBC in Vancouver, BC, Canada
|
||||
* Presently interning in backend dev for Mercury, a company offering banking<fnref>1</fnref> designed for the unique needs of startups
|
||||
* Haskell + TypeScript + Nix stack
|
||||
* Working on internal tools for risk management
|
||||
|
||||
<div class="footnotes">
|
||||
<ol>
|
||||
<li>Mercury is a financial technology company, not a bank. Banking services provided by Choice Financial Group and Evolve Bank & Trust, Members FDIC.</li>
|
||||
</ol>
|
||||
</div>
|
||||
</textarea></section>
|
||||
|
||||
<section data-markdown><textarea data-template>
|
||||
# what's closure size?
|
||||
|
||||
* Size of some derivation and everything it depends on
|
||||
* Accidental dependencies are the major contributor
|
||||
* Other systems don't have this problem: forgetting about runtime dependencies may silently fail (or work if you have them installed!) at runtime
|
||||
* "Closure" → like a function referencing values outside it
|
||||
</textarea></section>
|
||||
|
||||
<section data-markdown><textarea data-template>
|
||||
# how do I create a dependency?
|
||||
|
||||
* Only what goes in may go out: inputs may become runtime dependencies if they appear in the output
|
||||
* Follows from Nix's hermetic design: outputs are a strict subset of inputs
|
||||
* It's easy to cause accidental dependencies
|
||||
</textarea></section>
|
||||
|
||||
<section data-markdown><textarea data-template>
|
||||
# ok, but what does "appear" mean?
|
||||
|
||||
```
|
||||
grep -r '[0-9abcdfghijklmnpqrsvwxyz]{32}' $out
|
||||
```
|
||||
|
||||
Seriously.
|
||||
|
||||
Nix looks for 32 character strings forming the hash part of any of the store paths of the closure of the inputs to the derivation
|
||||
|
||||
See Figure 5.12 in the Nix thesis
|
||||
</textarea></section>
|
||||
|
||||
<section data-markdown><textarea data-template>
|
||||
# digression: "what went in?"
|
||||
|
||||
Nix strings are magic: they keep track of the derivations that they've referenced as "string context", and propagate that information into any derivations they land in.
|
||||
</textarea></section>
|
||||
|
||||
<section data-markdown><textarea data-template>
|
||||
# what does my stuff depend on?
|
||||
|
||||
<pre><code class="text"><script type="text/template">~ » nix path-info -rsSh nixpkgs#hello
|
||||
/nix/store/c8aj6kzv5h7c5vympiy7l1p3aw626yqy-libobjc-11.0.0 199.7K 199.7K
|
||||
/nix/store/y5cp9q9h6p80mzbsijs00zxpi7g0lc9d-apple-framework-CoreFoundation-11.0.0 667.1K 866.8K
|
||||
/nix/store/xbqj64vdr3z13nlf8cvl1lf5lxa16mha-hello-2.12.1 126.9K 993.7K
|
||||
</script></code></pre>
|
||||
</textarea></section>
|
||||
|
||||
<section data-markdown><textarea data-template>
|
||||
# that's a graph though
|
||||
|
||||
Yeah. I can't tell what the relationship is between these.
|
||||
No tree or graph mode for nix path-info unlike nix-store --query (the latter is not stellar anyway)
|
||||
</textarea></section>
|
||||
|
||||
<section data-markdown><textarea data-template>
|
||||
# what if..? haha, jk, unless?
|
||||
|
||||
There is a JSON output mode, what if we just used that? and then did some stuff to it
|
||||
|
||||
Some purely functional programming in jq later:
|
||||
|
||||
`nix-closure-graph nixpkgs#python3 > python3Closure.svg`
|
||||
</textarea></section>
|
||||
|
||||
<section data-markdown><textarea data-template>
|
||||
# cool
|
||||
|
||||
<div class="img-container">
|
||||
<img src="./img/python3Closure.svg" style="object-fit: cover; object-position: center;" width="100%" height="100%" alt="graphviz graph showing nodes for each of the packages Python depends on">
|
||||
</div>
|
||||
|
||||
</textarea></section>
|
||||
|
||||
<section data-markdown><textarea data-template>
|
||||
# what about a nixos image
|
||||
|
||||
whoops
|
||||
|
||||
<div class="img-container">
|
||||
<img src="./img/nixosClosure.svg" style="object-fit: cover; object-position: center;" width="100%" height="100%" alt="incomprehensible graphviz graph absolutely covered in lines for a nixos image">
|
||||
</div>
|
||||
|
||||
</textarea></section>
|
||||
|
||||
<section data-markdown><textarea data-template>
|
||||
# well that didn't work
|
||||
|
||||
I built this graph viewer prototype at work, I wonder if I could stick a NixOS closure into it
|
||||
|
||||
FIXME!!!
|
||||
|
||||
</textarea></section>
|
||||
|
||||
<section data-markdown><textarea data-template>
|
||||
# other projects from me
|
||||
|
||||
https://docs.jade.fyi - Single page HTML docs for GNU, postgres, and zsh
|
||||
|
||||
https://github.com/LF-/nix-doc - Interactive function documentation for Nix
|
||||
|
||||
https://github.com/LF-/nix-otel - Trace Nix builds with OpenTelemetry
|
||||
</textarea></section>
|
||||
|
||||
<section data-markdown><textarea data-template>
|
||||
# Mercury is hiring!
|
||||
|
||||
Front-end, back-end, management, design, data
|
||||
|
||||
https://mercury.com/jobs
|
||||
</textarea></section>
|
||||
|
||||
</div>
|
||||
</div>
|
||||
|
||||
|
|
@ -41,7 +171,9 @@
|
|||
hash: true,
|
||||
|
||||
// Learn about plugins: https://revealjs.com/plugins/
|
||||
plugins: [ RevealMarkdown, RevealHighlight, RevealNotes ]
|
||||
plugins: [ RevealMarkdown, RevealHighlight, RevealNotes ],
|
||||
transitionSpeed: 'fast',
|
||||
transition: 'none',
|
||||
});
|
||||
</script>
|
||||
</body>
|
||||
|
|
|
|||
47
content/pages/nixcon2022/styles.css
Normal file
47
content/pages/nixcon2022/styles.css
Normal file
|
|
@ -0,0 +1,47 @@
|
|||
:root {
|
||||
--r-heading-text-transform: none !important;
|
||||
--r-background-color: #190022 !important;
|
||||
--r-heading1-size: 1.5em;
|
||||
}
|
||||
.footnotes {
|
||||
font-size: 0.8rem;
|
||||
}
|
||||
fnref {
|
||||
font-size: 0.9rem;
|
||||
vertical-align: super;
|
||||
}
|
||||
.footnotes li {
|
||||
list-style: none;
|
||||
padding: 0;
|
||||
}
|
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.footnotes li::marker {
|
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content: "[" counter(list-item) "]\a0\a0";
|
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}
|
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|
||||
.reveal[data-transition-speed="faster"] .slides section {
|
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transition-duration: 100ms;
|
||||
}
|
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|
||||
.img-container {
|
||||
overflow-x: auto;
|
||||
overflow-y: hidden;
|
||||
max-width: 100%;
|
||||
height: 400px;
|
||||
}
|
||||
|
||||
.meta {
|
||||
padding: 0.1em 0.5em;
|
||||
background-color: #3c004d;
|
||||
}
|
||||
|
||||
.reveal pre {
|
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margin: 0;
|
||||
padding: 0.5em;
|
||||
}
|
||||
.reveal .code-wrapper code {
|
||||
white-space: pre-wrap !important;
|
||||
}
|
||||
|
||||
.reveal .slides {
|
||||
text-align: left !important;
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue