In preparation for the deprecation of `stdenv.isX`.
These shorthands are not conducive to cross-compilation because they
hide the platforms.
Darwin might get cross-compilation for which the continued usage of `stdenv.isDarwin` will get in the way
One example of why this is bad and especially affects compiler packages
https://www.github.com/NixOS/nixpkgs/pull/343059
There are too many files to go through manually but a treewide should
get users thinking when they see a `hostPlatform.isX` in a place where it
doesn't make sense.
```
fd --type f "\.nix" | xargs sd --fixed-strings "stdenv.is" "stdenv.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "stdenv'.is" "stdenv'.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "clangStdenv.is" "clangStdenv.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "gccStdenv.is" "gccStdenv.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "stdenvNoCC.is" "stdenvNoCC.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "inherit (stdenv) is" "inherit (stdenv.hostPlatform) is"
fd --type f "\.nix" | xargs sd --fixed-strings "buildStdenv.is" "buildStdenv.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "effectiveStdenv.is" "effectiveStdenv.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "originalStdenv.is" "originalStdenv.hostPlatform.is"
```
Found using https://github.com/serokell/xrefcheck, which unfortunately
can't trivially be enforced in CI because we also have the manual markdown
files that need post-processing to be valid
This is done with the following bash script:
```
#!/usr/bin/env bash
process_line() {
local filename=${1%:}
if [[ $4 =~ \"(.*)\"\; ]]; then
local sha256="${BASH_REMATCH[1]}"
fi
[[ -z $sha256 ]] && return 0
local hash=$(nix hash to-sri --type sha256 $sha256)
echo "Processing: $filename"
echo " $sha256 => $hash"
sed -i "s|cargoSha256 = \"$sha256\"|cargoHash = \"$hash\"|"
$filename
}
# split output by line
grep -r 'cargoSha256 = ' . | while IFS= read -r line; do
# split them further by space
read -r -a parts <<< "$line"
process_line "${parts[@]}"
done
```
The nixpkgs-unstable channel's programs.sqlite was used to identify
packages producing exactly one binary, and these automatically added
to their package definitions wherever possible.
Our Haskell package set for 8.10.7 violates the following bounds of
aeson 1.5:
hashable-time >=0.2.1 && <0.3,
primitive >=0.7.0.1 && <0.8,
vector >=0.12.0.1 && <0.13
Seems like it still compiles in spite of that…
