Along the lines of `assertOneOf`, but expects a list of values to be
compared. This gives a good error message and is useful for lists of
values, like `supportedGhcVersions` in the arguments of
`haskell-language-server`.
Just minor changes like:
- Always using "X is a Y, but it should be Z"
- "X is a path that does not exist" rather than "X does not exist"
- Always using multi-line strings for errors
- Always quoting string-like values and not quoting path-like values
- But do quote filesystem roots. Even though they're paths, they might
be very small, good to have quotes to know the start/end
- Capitalise the first word
- Distinguish root vs filesystem root more
We have several cross-compilation bugs that show up if
hostPlatform!=buildPlatform yet
hostPlatform.config==buildPlatform.config.
These bugs have appeared and disappeared as we've fiddled with the
definition of equality for platform objects. This commit adds a
clear-cut case where they are *not* equal and never will be, so we
can test it.
This does decrease performance unfortunately
Benchmarking expression toSource { root = ./.; fileset = ./.; }
Mean CPU time 0.103747 (σ = 0.012415) for 10 runs is 97.32181384964636% (σ = 16.34179537413021%) of the old value 0.106602 (σ = 0.0125571)
Statistic .envs.elements (205920) is 105.5842% (+10891) of the old value 195029
Statistic .gc.totalBytes (20247696) is 101.7495% (+348160) of the old value 19899536
Statistic .nrThunks (134824) is 108.7878% (+10891) of the old value 123933
Statistic .symbols.number (996) is 100.1005% (+1) of the old value 995
Statistic .values.number (275238) is 104.1199% (+10891) of the old value 264347
Currently just throws the Nix error because unknown file types are not
supported by the Nix store, but nothing catches this error earlier (yet,
see next commit)
gnu-config will ignore the portion of a triple matching the regex
`e?abi.*$` when determining the validity of a triple. In other
words, `i386-linuxabichickenlips` is a valid triple.
This commit updates our parsing routines to match gnu-config.
I was recently surprised to discover that it is in fact possible to
shoehorn ABI flavors into nix doubles in a way which preserves their
property of being a (non-canonical) subset of the valid gnu-config
triples. This commit is required in order to exploit that discovery
to add automatic detection of ILP32 platforms (64-bit void*, 32-bit
int, like the Apple Watch and MIPS n32) to Nix.
