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refactor(tvix/eval): rewrite xml emitter to be simple-stupid

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In order to be compatible with the nix XML generator, it’s easier to
generate the XML directly, instead of going through a library which we
have to bend to do what we need.

Removes dependency on `xml-rs`, which came with a full XML parser that
we didn’t use. Only takes a tiny bit of code for the XML escaping,
somewhat simplified.

I add a little escaping value, to make sure we have the same behaviour
as nix proper.

Interestingly enough, we never need to escape XML attribute names,
because the `builtins.toXML` format encodes user-defined values as
attribute keys only. So we only escape attribute values.

Fixes: https://b.tvl.fyi/issues/399
Change-Id: If4d407d324864b3bb9aa3160e2ec6889f7727127
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11697
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
Autosubmit: Profpatsch <mail@profpatsch.de>
This commit is contained in:
Profpatsch 2024-05-20 15:50:33 +02:00 • committed by clbot
parent e7be342256
commit 5b2ba0efa1
9 changed files with 205 additions and 89 deletions
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tvix/eval/Cargo.toml
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@ -30,7 +30,6 @@ smol_str = "0.2.0"
tabwriter = "1.2"
test-strategy = { version = "0.2.1", optional = true }
toml = "0.6.0"
xml-rs = "0.8.4"
sha2 = "0.10.8"
sha1 = "0.10.6"
md-5 = "0.10.6"