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So here is what has been keeping me up at night: At some point I
realized that nix actually made a somewhat passable language for CGI
programming:
* That `builtins.getEnv` exists as one of the impurities of Nix is
perfect as environment variables are the main way of communication
from the web server to the CGI application.
* We can actually read from the filesystem via builtins.readDir and
builtins.readFile with bearable overhead if we avoid importing the
used paths into the nix store.
* Templating and routing are convenient to implement via indented strings
and attribute sets respectively.
Of course there are obvious limitation:
* The overhead of derivations is probably much to great for them to be
useful via IfD.
* Even without derivations, nix evaluation is very slow to the point
were a trivial application takes between 100ms and 400ms to produce a
response.
* We can't really cause effects other than producing a response which
makes it not viable for a lot of applications. There are some ways
around this:
* With a custom interpreter we could have streaming and multiplexed
I/O (using lazy lists emulated via attrsets) to cause such effects,
but it would probably perform terribly.
* We can use builtins.fetchurl to call other HTTP-based microservices,
but only in very limited constraints, i. e. only GET, no headers,
and only if the tarball ttl is set to 0 in the global nix.conf.
* Terrible error handling capabilities because builtins.tryEval actually
doesn't catch a lot of errors.
To prove that it actually works, there are some demo applications,
which I invite you to run and potentially break horribly:
nix-build -A web.bubblegum.examples && ./result
# navigate to http://localhost:9000
The setup uses thttpd and executes the nix CGI scripts using
users.sterni.nint which automatically passed `depot`, so they can
import the cgi library.
Change-Id: I3a22a749612211627e5f8301c31ec2e7a872812c
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2746
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
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nint (short for nix interpreter) is a tiny wrapper around nix-instantiate
which allows to run nix scripts, i. e. nix expressions that conform to
a certain calling convention. A nix script runnable using nint must
conform to the following constraints:
* It must evaluate to a function which has a set pattern with an
ellipsis as the single argument.
* It must produce a string as a return value or fail.
When invoked, a the expression receives the following arguments:
* `currentDir`: the current working directory as a nix path
* `argv`: a list of strings containing `argv` including `argv[0]`
* extra arguments which are manually specified which allows for
passing along dependencies or libraries, for example:
nint --arg depot '(import /depot {})' my-prog.nix [ argv[1] … ]
would pass along depot to be used in `my-prog.nix`.
Such nix scripts are purely functional in a sense: The way inputs can be
taken is very limited and causing effects is also only possible in a
very limited sense (using builtins.fetchurl if TARBALL_TTL is 0,
adding files and directories to the nix store, realising derivations).
As an approximation, a program executed using nint can be thought of
as a function with the following signature:
λ :: environment → working directory → argv → stdout
where environment includes:
* the time at the start of the program (`builtins.currentTime`)
* other information about the machine (`builtins.currentSystem` …)
* environment variables (`builtins.getEnv`)
* the file system (`builtins.readDir`, `builtins.readFile`, …) which
is the biggest input impurity as it may change during evaluation
Additionally import from derivation and builtin fetchers are available
which introduce further impurities to be utilized.
Future work:
* Streaming I/O via lazy lists. This would allow usage of
stdin and output before the program terminates. However this would
require using libexpr directly or writing a custom nix interpreter.
A description of how this would work can be found on the website of the
esoteric programming language Lazy K: https://tromp.github.io/cl/lazy-k.html
* An effect system beyond stdin / stdout.
* Better error handling, support setting exit codes etc.
These features would require either using an alternative or custom
interpreter for nix (tvix or hnix) or to link against libexpr directly
to have more control over evaluation.
Change-Id: I61528516eb418740df355852f23425acc4d0656a
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2745
Reviewed-by: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
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Change-Id: I8baf2404f0f6e9c4fad767911646cdc55051dd2e
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2753
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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Change-Id: I41d71f9aae7e64bdfef8f2b7142d13009b216eaa
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2752
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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Getting `lib` from `stdenv.lib` is deprecated, and throws warnings.
Change-Id: Ic925818c1b5a67d15d6d40ad784554328cd603e0
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2751
Reviewed-by: lukegb <lukegb@tvl.fyi>
Reviewed-by: glittershark <grfn@gws.fyi>
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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This also looks much cleaner than before.
Change-Id: I767b881c73699151afc03746c04e413e74f30387
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2750
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
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This modifies the capture regex executed by `jq` to capture the TODO
text itself as a separate capture group, which is then used for the
content of the TODO listing.
The web listing looks much cleaner this way.
Change-Id: I00a14da57b315a353f700c112ba33f38e16f1f85
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2749
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
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Change-Id: Iba48c8ac8c45075ecb9741572bca9cea4f8b0f9d
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2748
Reviewed-by: glittershark <grfn@gws.fyi>
Tested-by: BuildkiteCI
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The way this loads the api key is a hack, but also... I don't care!
Change-Id: I4d417b1a824007620661188b60b21a1f73867dca
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2747
Reviewed-by: glittershark <grfn@gws.fyi>
Tested-by: BuildkiteCI
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We use builtins.split directly as it should be a bit more efficient as
lib.splitStrings. Also its returning of a list for every regex match is
useful to update the state while parsing the tokens:
* The tokens are obtained by splitting the string at every '%'
* Everytime we see a boundary (that is a list in the returned
list of builtins.split), we know that the first two chars of
the next string are a percent encoded character.
One implementation flaw is that it will currently crash if it encounters
mal-formed URLs (since int.fromHex chrashes if it encounters any non
hex digit characters) and accepts some malformed urlencoding like
"foo %A".
Change-Id: I90d08d7a71b16b4f4a4879214abd7aeff46c20c8
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2744
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
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`hii` is a derived rewrite of suckless’s `ii`.
It is not backwards compatible.
Change-Id: Ife2a43863b5b6ba38333d7ae5f2cb9bd4787b5fc
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2706
Tested-by: BuildkiteCI
Reviewed-by: lukegb <lukegb@tvl.fyi>
Reviewed-by: sterni <sternenseemann@systemli.org>
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About to do some dhalllll! \o/
Change-Id: Ie58c335d80f4a5abeb8296ece5a24377f07e6369
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2585
Tested-by: BuildkiteCI
Reviewed-by: lukegb <lukegb@tvl.fyi>
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In order to arbitrarily split netencode over multiple reads, we need
to make the parser completely streaming, so that it recognizes all
cases where it needs more input.
Luckily, this is fairly trivial, after working around a bunch of
overeager parsing.
The tricky part was the giant `alt`, where inner parsers would start
consuming input and thus become incomplete when they fail afterwards.
Sinc the format *always* starts the different types with one
discriminator char, we can use that to instantly return the parser and
try the next one instead.
The other tricky part was that lists and records would parse all inner
elements and then choke on the empty string after the last element,
because the inner parser would consume at least the descriminator, and
an empty string is always `Incomplete`. We wrap these into a small
combinator which plays nice with `many0` in that regard.
Change-Id: Ib8d15d9a7cab19d432c6b24a35fcad6a5a72b246
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2704
Tested-by: BuildkiteCI
Reviewed-by: Profpatsch <mail@profpatsch.de>
Reviewed-by: sterni <sternenseemann@systemli.org>
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This is a quick hack to make it possible to view the rendered SVG on
https://code.tvl.fyi/about/tvix/docs/components.md
We want to be able to do this sort of thing dynamically in the future,
but we can't yet, so ... well. Deal with it.
Change-Id: Id2b819679d748b6f517018a9c6e72d5c1d806c4c
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2743
Reviewed-by: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
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Very simple builder which builds (optionally) gzipped man pages from a
list of attrsets and links them into a common man directory with the
correct layout, so it should be installable immediately.
Additionally runs mandoc -T lint, but by default only for informational
purposes as it is very strict and some things are almost never true (for
example all Xrs being present in the respective directory).
buildManPages.single exposes the internal builder for a single,
optionally gzipped man page from a nix attrset.
Change-Id: I43fce011716f4a7cc80521f222800ca99ba54060
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2654
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
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We also want to access the produced SVGs separately.
Change-Id: I5bdfd95b8a56323ed8bf5f4585b703f6e728c677
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2742
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
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Most other docs folders in the repo are called `doc` too, let's make
this consistent.
Change-Id: Icd712429b51763076548c977321e370f2a77877e
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2741
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
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* general editing
* reflowed text to fit on my screen :p
Change-Id: I1ae41ef5524d3174d063c66a7bcb990808424bdb
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2716
Tested-by: BuildkiteCI
Reviewed-by: adisbladis <adisbladis@gmail.com>
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Change-Id: I11d3f473142a9b15c5fed6b213c825ccf1c70491
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2714
Reviewed-by: adisbladis <adisbladis@gmail.com>
Tested-by: BuildkiteCI
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This chops off "front matter", which we have - for example - in Tvix
documentation that is rendered through Pandoc.
Change-Id: I65c7a4ad8171423a50aaf47c046dab8c774346d8
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2717
Reviewed-by: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
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This required some minor Comrak-related refactoring.
Change-Id: I5c5898eb895bd5d8743949458ee9406087fcff22
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2690
Tested-by: BuildkiteCI
Reviewed-by: glittershark <grfn@gws.fyi>
Reviewed-by: lukegb <lukegb@tvl.fyi>
Reviewed-by: flokli <flokli@flokli.de>
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Covers some of the odd things we do, specifically callouts and code
rendering.
Change-Id: Ib8542373b434b53d277b0d8c9ddb78ac7c5176a5
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2689
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
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Change-Id: I2cf67df085d0c008b5ff5efff2235a670207024a
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2711
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
Reviewed-by: tazjin <mail@tazj.in>
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Change-Id: I53856bf98c5c2057f95e9c9af5f07c16ced55e0f
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2712
Reviewed-by: tazjin <mail@tazj.in>
Reviewed-by: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
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This reverts commit 3b05be2fd0c0035977dbac731c26651b9ff3e373.
Reason for revert: Sourcegraph still does not support fetching arbitrary refs, so we'll have to wait until its Gerrit integration lands before this will work correctly.
Change-Id: Icee82c50f92c34ba1741b608449aed16538ccbaa
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2721
Tested-by: BuildkiteCI
Reviewed-by: lukegb <lukegb@tvl.fyi>
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These were actually just copy&pasted from the layout of my
blog (//users/tazjin/blog), even including a dead link.
This commit adds more relevant links instead.
Change-Id: Ib55aac492f1f9bff650edfa43b52d3d5d611410c
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2713
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
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Change-Id: I7d0e81d6a88f351c7451454f5d506d708e7ed9ca
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2710
Tested-by: BuildkiteCI
Reviewed-by: adisbladis <adisbladis@gmail.com>
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This was originally done when "the purge" happened, and I don't think
it's quite accurate anymore.
This reverts commit 94846503c59b4155cc98280ef1c5cbcf69696ff9.
Change-Id: I4be2bccfa68505a2f663ab1695e547321d2dd0b8
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2709
Reviewed-by: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
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Change-Id: I9266ed310024a2a9437ea983dfdf27b8a395c924
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2707
Reviewed-by: glittershark <grfn@gws.fyi>
Tested-by: BuildkiteCI
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I'm only connected to my own tethering nets anyways and I can't be
bothered to figure out all the things I need to open for Chromecasts,
maybe later.
Change-Id: Id1715b205191d4494a5a7001e1fb0f41a89d3de6
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2705
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
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Don't apply the left-margin if the viewport is too narrow too handle it
Change-Id: Ia15641a6f0c94f9b0582f4a48af00b935f3e66bc
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2703
Reviewed-by: glittershark <grfn@gws.fyi>
Tested-by: BuildkiteCI
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Add blackbox prometheus exporters to Mugwump with config for scraping
gws.fyi, windtunnel.ci, and app.windtunnel.ci
Change-Id: Ied9e329d44b506763b600e4978f65a5a3abcf5df
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2702
Reviewed-by: glittershark <grfn@gws.fyi>
Tested-by: BuildkiteCI
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Change-Id: I0a416ef919859b7516861de7fb575616f5479d26
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2701
Reviewed-by: glittershark <grfn@gws.fyi>
Tested-by: BuildkiteCI
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Expose website as a top-level attribute, and ignore index.html, both to
make test-deving the site easier
Change-Id: Ic056446e322ec5f69583d316998103883fc8d55b
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2700
Reviewed-by: glittershark <grfn@gws.fyi>
Tested-by: BuildkiteCI
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Explicitly pass --profile personal to AWS commands, to avoid deploying
this to the wrong aws account on accident
Change-Id: Iff8236967adcfdedfbace8930031db9adf60e3d1
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2699
Reviewed-by: glittershark <grfn@gws.fyi>
Tested-by: BuildkiteCI
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Also start to put things under headings, since we have CSS to make that
look decent now
Change-Id: I9ad8c5f5bf32360bcae48fb28e390391fcec0a88
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2698
Reviewed-by: glittershark <grfn@gws.fyi>
Tested-by: BuildkiteCI
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web-brutalism is so 3 years ago, bro
but seriously, I'd like to start putting some actual stuff here, so
let's make it look halfway-decent.
Change-Id: Ic78d725b3755c2307c7ea155af8d0f90e287830c
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2697
Reviewed-by: glittershark <grfn@gws.fyi>
Tested-by: BuildkiteCI
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Chupacabra doesn't even exist anymore, plus I want this installed on all
home systems
Change-Id: Id0e5c89797b1ad52b2a24d60ad3ab5e125f60266
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2696
Reviewed-by: glittershark <grfn@gws.fyi>
Tested-by: BuildkiteCI
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Add support for a zero-sized Unit type. This requires some special at
the codegen level because LLVM (unsurprisingly) only allows Void types
in function return position - to make that a little easier to handle
there's a new pass that strips any unit-only expressions and pulls
unit-only function arguments up to new `let` bindings, so we never have
to actually pass around unit values.
Change-Id: I0fc18a516821f2d69172c42a6a5d246b23471e38
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2695
Reviewed-by: glittershark <grfn@gws.fyi>
Tested-by: BuildkiteCI
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When sending irc notifications, insert a zero-width space after the
first character of the username of the author of issues, to prevent that
user from receiving a ping.
Fixes: b/95
Change-Id: Ibcacb45129b2cb99b587744eb61f4f1dbc0060d6
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2693
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
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Sterni has been doing a lot of good mainenance work, and I'd like to
enable that in as unblocked a fashion as possible.
Change-Id: I5bbd2459864c3d4b7e6b9927fc5d4824efc854e6
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2692
Tested-by: BuildkiteCI
Reviewed-by: glittershark <grfn@gws.fyi>
Reviewed-by: sterni <sternenseemann@systemli.org>
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Change-Id: I3fbdbdc177471429d80ed50b4424e5f0b96e6272
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2694
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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Instead of only "nopinging" the username in the templated message,
replace all instances of the CL owner's name with one that does
not (tries to not) highlight them.
This way, CLs sent to another user's folder will still highlight them.
Change-Id: I9a3d8563ab32befc1a1b1412851026343c170dd3
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2688
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: glittershark <grfn@gws.fyi>
Reviewed-by: lukegb <lukegb@tvl.fyi>
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Something changed in the upstream we fetch this source from that's
causing the fetch to fail - I can only assume it's a yanked rev, but
I'm not really sure. fetchgit from nixpkgs appears to be a little bit
more robust than builtins.fetchGit, so let's switch to that, and also
upgrade to a rev that we know is present.
Fixes: b/96
Change-Id: I8983c2df11ab4fa20f60915f950c6a7378efd2fd
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2691
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
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Change-Id: Ib18b5bef23a198e7ca031f48290cf0ff0655d8dd
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2687
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
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This fixes https://b.tvl.fyi/issues/81
Change-Id: I5071b3edd81947b43f755e452a62b0129c6d07b6
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2686
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
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Change-Id: Ib4d4736c48a31510660b2861aabb9b7ef1320209
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2684
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
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Change-Id: Ibdb5b498f8bbc837fffdb38cdf95499b279773aa
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2683
Reviewed-by: lukegb <lukegb@tvl.fyi>
Tested-by: BuildkiteCI
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Change-Id: Id19eafb3f2cc7dfa1ec8c47cbe9c5766ac491516
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2682
Reviewed-by: lukegb <lukegb@tvl.fyi>
Reviewed-by: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
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Change-Id: Iab2d2d6b7096ef302ea2fd8b051041426c6c8ca6
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2670
Tested-by: BuildkiteCI
Reviewed-by: glittershark <grfn@gws.fyi>
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