ytop: Add "ytop" to ytop's error message #101098
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Right now, running `nixos-rebuild` gives an obscure error: ``` $ nixos-rebuild switch building Nix... building the system configuration... error: Abandoned by upstream. Consider switching to bottom instead (use '--show-trace' to show detailed location information) ``` (And `--show-trace` adds no useful information.) The error message doesn't indicate that `ytop` is what's causing the problem. By adding `ytop` to the error message, configurations that still reference `ytop` will be easier to debug and fix.
cole-h
approved these changes
Oct 20, 2020
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Actually in that file there are some other occurrences like this, maybe we can fix them all? |
10 tasks
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Sorry, this is a mistake on my end. I had assumed that aliasing a package to throw an error would also give the attribute that failed to evaluate. |
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Still as this seems a common and easy enough mistake to make, we should probably think about some form of automation. |
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Linking the RFC mentioned on IRC: NixOS/rfcs#33 |
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Oct 20, 2020
aliases.nix: errors should include package names In `pkgs/top-level/aliases.nix`, `throw` was used to make packages that were removed error with a more useful message than "attribute 'foobar' missing, at <location>". However, if the error message doesn't include the package's attribute name, it can be difficult to determine what caused it. For example, here's what building a configuration that referenced `ytop` looked like recently (see NixOS#101098): ``` $ nixos-rebuild switch building Nix... building the system configuration... error: Abandoned by upstream. Consider switching to bottom instead (use '--show-trace' to show detailed location information) ``` Therefore, we modify string values in `aliases.nix` to prefix `Attribute foobar in <nixpkgs> has been removed` to the reason message. This makes the removed reasons a bit shorter and provides a place to unilaterally improve these error messages in the future, rather than with one-off changes or large sets of manual fixes.
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Opened #101210 to automatically add attr names, so this mistake can't be made manually any more. |
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Right now, running
nixos-rebuildgives an obscure error:(And
--show-traceadds no useful information.)The error message doesn't indicate that
ytopis what's causing the problem.By adding
ytopto the error message, configurations that still referenceytopwill be easier to debug and fix.