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feat(tvix/nix-compat/narinfo): roundtrip special compression algorithms

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Roundtrip `Compression: none` and the default compression algorithm (`Compression:` missing).
We aim to produce bit-identical output when roundtripping.

Change-Id: I9db00db4b15b71f33f34ff3308a8e12d7deec5f4
Reviewed-on: https://cl.tvl.fyi/c/depot/+/13004
Autosubmit: Lukas Zirpel <luflosi@luflosi.de>
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
This commit is contained in:
Luflosi 2025-01-16 14:15:39 +02:00 • committed by clbot
parent 7824f8a91f
commit 860b374a54
1 changed files with 30 additions and 4 deletions
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34
tvix/nix-compat/src/narinfo/mod.rs
View file

@ -344,9 +344,10 @@ impl Display for NarInfo<'_> {
writeln!(w, "StorePath: /nix/store/{}", self.store_path)?;
writeln!(w, "URL: {}", self.url)?;
if let Some(compression) = self.compression {
if !self.flags.contains(Flags::COMPRESSION_DEFAULT) {
let compression = self.compression.unwrap_or("none");
writeln!(w, "Compression: {compression}")?;
}
};
if let Some(file_hash) = self.file_hash {
writeln!(w, "FileHash: sha256:{}", nixbase32::encode(&file_hash),)?;
@ -534,7 +535,7 @@ CA: fixed:r:sha1:1ak1ymbmsfx7z8kh09jzkr3a4dvkrfjw
fn compression_default() {
// This doesn't exist as such in cache.nixos.org.
// We explicitly removed the compression field for the sake of this test.
let parsed = NarInfo::parse(r#"StorePath: /nix/store/a1jjalr4csx9hcga7fnm122aqabrjnch-digikam-2.6.0
let input = r#"StorePath: /nix/store/a1jjalr4csx9hcga7fnm122aqabrjnch-digikam-2.6.0
URL: nar/1fzimfnvq2k8b40n4g54abmncpx2ddckh6qlb77pgq6xiysyil69.nar.bz2
FileHash: sha256:1fzimfnvq2k8b40n4g54abmncpx2ddckh6qlb77pgq6xiysyil69
FileSize: 43503778
@ -544,10 +545,35 @@ References: 0izkyk7bq2ag9393nvnhgm87p75cq09w-liblqr-1-0.4.1 1cslpgyb7vb30inj3210
Deriver: la77dr44phk5m5jnl4dvk01cwpykyw9s-digikam-2.6.0.drv
System: i686-linux
Sig: cache.nixos.org-1:92fl0i5q7EyegCj5Yf4L0bENkWuVAtgveiRcTEEUH0P6HvCE1xFcPbz/0Pf6Np+K1LPzHK+s5RHOmVoxRsvsDg==
"#).expect("should parse");
"#;
let parsed = NarInfo::parse(input).expect("should parse");
assert!(parsed.flags.contains(Flags::COMPRESSION_DEFAULT));
assert_eq!(parsed.compression, Some("bzip2"));
assert_eq!(parsed.to_string(), input);
}
#[test]
fn compression_none() {
// This doesn't exist as such in cache.nixos.org.
// We explicitly changed the Compression, FileHash and FileSize fields for the sake of this test.
let input = r#"StorePath: /nix/store/a1jjalr4csx9hcga7fnm122aqabrjnch-digikam-2.6.0
URL: nar/1fzimfnvq2k8b40n4g54abmncpx2ddckh6qlb77pgq6xiysyil69.nar.bz2
Compression: none
FileHash: sha256:0zpbbwipqzr5p8mlpag9wrsp5hlaxkq7gax5jj0hg3vvdziypcw5
FileSize: 100658640
NarHash: sha256:0zpbbwipqzr5p8mlpag9wrsp5hlaxkq7gax5jj0hg3vvdziypcw5
NarSize: 100658640
References: 0izkyk7bq2ag9393nvnhgm87p75cq09w-liblqr-1-0.4.1 1cslpgyb7vb30inj3210jv6agqv42jxz-qca-2.0.3 1sya3bwjxkzpkmwn67gfzp4gz4g62l36-libXrandr-1.3.1 26yxdaa9z0ma5sgw02i670rsqnl57crs-glib-2.30.3 27lnjh99236kmhbpc5747599zcymfzmg-qt-4.8.2 2v6x378vcfvyxilkvihs60zha54z2x2y-qjson-0.7.1 45hgr3fbnr45n795hn2x7hsymp0h2j2m-libjpeg-8c 4kw1b212s80ap2iyibxrimcqb5imhfj7-libkexiv2-4.7.4 7dvylm5crlc0sfafcc0n46mb5ch67q0j-glibc-2.13 a05cbh1awjbl1rbyb2ynyf4k42v5a9a7-boost-1.47.0 a1jjalr4csx9hcga7fnm122aqabrjnch-digikam-2.6.0 aav5ffg8wlnilgnvdb2jnrv2aam4zmmz-perl-5.14.2 ab0m9h30nsr13w48qriv0k350kmwx567-kdelibs-4.7.4 avffkd49cqvpwdkzry8bn69dkbw4cy29-lensfun-0.2.5 cy8rl8h4yp2j3h8987vkklg328q3wmjz-gcc-4.6.3 dmmh5ihyg1r2dm4azgsfj2kprj92czlg-libSM-1.2.0 fl56j5n4shfw9c0r6vs2i4f1h9zx5kac-soprano-2.7.6 g15cmvh15ggdjcwapskngv20q4yhix40-jasper-1.900.1 i04maxd0din6v92rnqcwl9yra0kl2vk5-marble-4.7.4 kqjjb3m26rdddwwwkk8v45821aps877k-libICE-1.0.7 lxz9r135wkndvi642z4bjgmvyypsgirb-libtiff-3.9.4 m9c8i0a6cl30lcqp654dqkbag3wjmd00-libX11-1.4.1 mpnj4k2ijrgyfkh48fg96nzcmklfh5pl-coreutils-8.15 nppljblap477s0893c151lyq7r7n5v1q-zlib-1.2.7 nw9mdbyp8kyn3v4vkdzq0gsnqbc4mnx3-expat-2.0.1 p1a0dn931mzdkvj6h5yzshbmgxba5r0z-libgphoto2-2.4.11 pvjj07xa1cfkad3gwk376nzdrgknbcqm-mesa-7.11.2 pzcxag98jqccp9ycbxknyh0w95pgnsk4-lcms-1.19 qfi5pgds33kg6vlnxsmj0hyl74vcmyiz-libpng-1.5.10 scm6bj86s3qh3s3x0b9ayjp6755p4q86-mysql-5.1.54 sd23qspcyg385va0lr35xgz3hvlqphg6-libkipi-4.7.4 svmbrhc6kzfzakv20a7zrfl6kbr5mfpq-kdepimlibs-4.7.4 v7kh3h7xfwjz4hgffg3gwrfzjff9bw9d-bash-4.2-p24 vi17f22064djgpk0w248da348q8gxkww-libkdcraw-4.7.4 wkjdzmj3z4dcbsc9f833zs6krdgg2krk-phonon-4.6.0 xf3i3awqi0035ixy2qyb6hk4c92r3vrn-opencv-2.4.2 y1vr0nz8i59x59501020nh2k1dw3bhwq-libusb-0.1.12 yf3hin2hb6i08n7zrk8g3acy54rhg9bp-libXext-1.2.0
Deriver: la77dr44phk5m5jnl4dvk01cwpykyw9s-digikam-2.6.0.drv
System: i686-linux
Sig: cache.nixos.org-1:92fl0i5q7EyegCj5Yf4L0bENkWuVAtgveiRcTEEUH0P6HvCE1xFcPbz/0Pf6Np+K1LPzHK+s5RHOmVoxRsvsDg==
"#;
let parsed = NarInfo::parse(input).expect("should parse");
assert!(!parsed.flags.contains(Flags::COMPRESSION_DEFAULT));
assert_eq!(parsed.compression, None);
assert_eq!(parsed.to_string(), input);
}
#[test]