| 3 Feb 2025 |
 alexfmpe | this gives an attrset that will attempt to build with tests all packages for which we don't build the tests | 12:00:33 |
| alexfmpe | the output of nix-build --keep-going will spit out all the ones who need the tests to stay disabled | 12:01:05 |
| alexfmpe | a bit of sed and grep gives us the complement of that with respect to the original attrset: the ones whose tests can now be enabled | 12:01:57 |
| alexfmpe | removal itself is still O ( n ), but n here is the number of cleanups, not total packages | 12:02:37 |
| alexfmpe | the same mechanism can be used for jailbreak = false, doHaddock = false | 12:03:19 |
| alexfmpe | and, what I realized today, is that we can also use as predicate the comparison with super.${pkg.pname}.version | 12:04:19 |
| alexfmpe | so we should soon (TM) have a mechanism to sweep over and detect obsolete trivial overrides | 12:05:18 |
| alexfmpe | TL;DR: intentional version warnings are nice to have, but if we can't always guarantee them, then we want the full sweep safety net anyway, in which case no need to clutter hydra logs? | 12:07:38 |
| alexfmpe | * taking dontCheck as an example:
I have a .nix file that filters haskellPackages and filters for all derivations with doCheck = false, then does doCheck = true for all of them | 12:08:00 |
| alexfmpe | * nix-build --keep-going will spit out all the ones that failed - i.e. the ones who need the tests to stay disabled | 12:08:35 |
| alexfmpe | * taking
dontCheck as an example:
I have a .nix file that filters haskellPackages and filters for all derivations with doCheck == false, then does doCheck = true for all of them | 13:51:44 |
| alexfmpe | * taking
`dontCheck` as an example:
I have a .nix file that filters haskellPackages and filters for all derivations with `doCheck == false`, then does `doCheck = true` for all of them | 13:52:03 |
| alexfmpe | * taking
dontCheck as an example:
I have a .nix file that filters haskellPackages for all derivations with doCheck == false, then does doCheck = true for all of them | 13:52:40 |
| alexfmpe | * taking
dontCheck as an example:
I have a .nix file that filters haskellPackages for derivations with doCheck == false, then does doCheck = true for all of them | 13:52:53 |
| alexfmpe | if that step turns out to be wonky, can always inject an easily grepable "I built" on the checked packages
overrideCabal (old: {
postFixup = ''
${old.postFixup or ""}
echo "Override no longer needed for ${old.pname}"
'';
})
| 14:08:36 |
| alexfmpe | $ nix-build -A haskell.packages.ghc98.hello --check 2>&1 | tail -n 3
patching script interpreter paths in /nix/store/6da7xi7dd6wjpgl3bn09xp4p4qjw1ckf-hello-1.0.0.2-doc
Override no longer needed for hello
/nix/store/ais54949224v9ndhgqgj5fz47ah95pij-hello-1.0.0.2
| 14:10:54 |
| alexfmpe | at the cost of extra builds due to --check | 14:11:25 |
| alexfmpe | ah huh actually that won't work because --check errors if the input hasn't been built, would need some force rebuild option | 14:13:03 |
| alexfmpe | annoying that nix doesn't output the built store paths when there were also failures | 14:13:31 |
 Alex | In reply to @alexfmpe:matrix.org
annoying that nix doesn't output the built store paths when there were also failures You could achieve this by splitting your nix-build command into a nix-instantiate (gives drv), a nix-build (realises drv into outputs), and a nix-store --query (can list outputs for drv). | 21:49:16 |
| 4 Feb 2025 |
| alexfmpe | Thanks, I'll try that | 07:19:39 |
|  Axman6 joined the room. | 07:56:52 |
|  unebnf joined the room. | 07:58:14 |
 magic_rb | @axman6:matrix.org youll have to go through pkgsCross.something-something.hostPackages.ghc | 08:06:36 |
| magic_rb | Thats the general way to get a cross compiler with nixpkgs. The javascript one works, havent tested the wasm one | 08:07:06 |
| Axman6 | so pkgsCross.wasi32.hostPackages.ghc121 or something? | 08:07:59 |
| magic_rb | Something along those lines, open up a nix repl and see whats available | 08:08:20 |
| Axman6 | s/Packages/Platform | 08:08:57 |
| Axman6 | yeah doing that now | 08:09:02 |
| magic_rb | In reply to @axman6:matrix.org
s/Packages/Platform Good catch | 08:09:12 |
