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And remove unnecessary mention of `nix-env`
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lib.meta.availableOn: add example in documentation
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Benchmarks (`nix-instantiate ./. -A python3`)
- Before
``` json
{
"cpuTime": 0.30625399947166443,
"envs": {
"bytes": 4484216,
"elements": 221443,
"number": 169542
},
"gc": {
"heapSize": 402915328,
"totalBytes": 53091024
},
"list": {
"bytes": 749424,
"concats": 4242,
"elements": 93678
},
"nrAvoided": 253991,
"nrFunctionCalls": 149848,
"nrLookups": 49614,
"nrOpUpdateValuesCopied": 1588326,
"nrOpUpdates": 10106,
"nrPrimOpCalls": 130356,
"nrThunks": 359013,
"sets": {
"bytes": 30432320,
"elements": 1860540,
"number": 41480
},
"sizes": {
"Attr": 16,
"Bindings": 16,
"Env": 16,
"Value": 24
},
"symbols": {
"bytes": 236218,
"number": 24459
},
"values": {
"bytes": 10504632,
"number": 437693
}
}
```
- After
```
{
"cpuTime": 0.29695799946784973,
"envs": {
"bytes": 3296712,
"elements": 169055,
"number": 121517
},
"gc": {
"heapSize": 402915328,
"totalBytes": 49044992
},
"list": {
"bytes": 504928,
"concats": 4242,
"elements": 63116
},
"nrAvoided": 175403,
"nrFunctionCalls": 110554,
"nrLookups": 44907,
"nrOpUpdateValuesCopied": 1588326,
"nrOpUpdates": 10106,
"nrPrimOpCalls": 82330,
"nrThunks": 306625,
"sets": {
"bytes": 29943328,
"elements": 1843076,
"number": 28382
},
"sizes": {
"Attr": 16,
"Bindings": 16,
"Env": 16,
"Value": 24
},
"symbols": {
"bytes": 236218,
"number": 24459
},
"values": {
"bytes": 9037752,
"number": 376573
}
}
```
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Signed-off-by: Sefa Eyeoglu <contact@scrumplex.net>
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getExe' can be used to get a binary other than the mainProgram from a
derivation.
Signed-off-by: Sefa Eyeoglu <contact@scrumplex.net>
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Before this commit, getExe assumes that if `meta.mainProgram` is unset,
it has a main program that's named after the package name.
While this is probable, it leads to a bad error when the assumption does
not hold. If the user called `getExe` themselves, they might narrow down
the location of the assumption quite easily, but if that's not the case,
they'll have to go down the rabbit hole to figure out what went wrong.
For example, a NixOS module may use `lib.getExe` on a package-typed option
which is then used in the system configuration. This then typically leads
to a failure *after* deployment, which is bad, and it's quite likely that
the user will debug the package output contents before digging through the
NixOS module, which is bad.
Furthermore the `getExe` call is rather inconspicuous as it does not
contain something like "/bin/foo", which is bad.
Also modules can be hard to read for a newbie, which is bad.
All of this can be avoided by requiring `meta.mainProgram`.
Many packages already have the attribute, and I would expect 80% of
`getExe` usages to be covered by 20% of packages, because plenty of
packages aren't used with `getExe` anyway.
Finally we could make an effort to set `mainProgram` semi-automatically
using `nix-index`.
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Co-authored-by: Naïm Favier <n@monade.li>
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Co-authored-by: Naïm Favier <n@monade.li>
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This reverts commit b7d097438b9b0f782a707f3295d320d824810864.
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`hasUnsupportedPlatform` was not updated with #37395, so it does not
understand attrsets in `meta.[bad]platforms`. In particular,
attrsets in `meta.badPlatforms` will "fail open" and be ignored.
Let's use `lib.meta.availableOn` instead of duplicating its logic.
Thanks to @alyssais for [noticing][1].
[1][https://github.com/NixOS/nixpkgs/pull/194148#discussion_r990817610]
Co-authored-by: sternenseemann <sternenseemann@systemli.org>
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caused problems for automated rich text generation such as
https://teu5us.github.io/nix-lib.html#customisation-functions
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Move function spdxLicense, internally used in yarn2nix
to lib/meta.nix, and
rename to getLicenseFromSpdxId
A similar function is implemented in poetry2nix,
but the one originally in yarn2nix seems beter.
since it falls back to an license-like attrset
for mismatched case
instead of a plain string
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For when `hiPrio` and `lowPrio` are not enough.
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The isKexecable flag treated Linux without kexec as just a normal
variant, when it really should be treated as a special case incurring
complexity debt to support.
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I need it in stdenv and release-lib, so that seems motivation enough.
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This does break the API of being able to import any lib file and get
its libs, however I'm not sure people did this.
I made this while exploring being able to swap out docFn with a stub
in #2305, to avoid functor performance problems. I don't know if that
is going to move forward (or if it is a problem or not,) but after
doing all this work figured I'd put it up anyway :)
Two notable advantages to this approach:
1. when a lib inherits another lib's functions, it doesn't
automatically get put in to the scope of lib
2. when a lib implements a new obscure functions, it doesn't
automatically get put in to the scope of lib
Using the test script (later in this commit) I got the following diff
on the API:
+ diff master fixed-lib
11764a11765,11766
> .types.defaultFunctor
> .types.defaultTypeMerge
11774a11777,11778
> .types.isOptionType
> .types.isType
11781a11786
> .types.mkOptionType
11788a11794
> .types.setType
11795a11802
> .types.types
This means that this commit _adds_ to the API, however I can't find a
way to fix these last remaining discrepancies. At least none are
_removed_.
Test script (run with nix-repl in the PATH):
#!/bin/sh
set -eux
repl() {
suff=${1:-}
echo "(import ./lib)$suff" \
| nix-repl 2>&1
}
attrs_to_check() {
repl "${1:-}" \
| tr ';' $'\n' \
| grep "\.\.\." \
| cut -d' ' -f2 \
| sed -e "s/^/${1:-}./" \
| sort
}
summ() {
repl "${1:-}" \
| tr ' ' $'\n' \
| sort \
| uniq
}
deep_summ() {
suff="${1:-}"
depth="${2:-4}"
depth=$((depth - 1))
summ "$suff"
for attr in $(attrs_to_check "$suff" | grep -v "types.types"); do
if [ $depth -eq 0 ]; then
summ "$attr" | sed -e "s/^/$attr./"
else
deep_summ "$attr" "$depth" | sed -e "s/^/$attr./"
fi
done
}
(
cd nixpkgs
#git add .
#git commit -m "Auto-commit, sorry" || true
git checkout fixed-lib
deep_summ > ../fixed-lib
git checkout master
deep_summ > ../master
)
if diff master fixed-lib; then
echo "SHALLOW MATCH!"
fi
(
cd nixpkgs
git checkout fixed-lib
repl .types
)
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Meta attributes types are now enforce as of commit
90b9719f4fc95e54400a66bffcc8044c568cfa4b,
so ensure meta.priority is always set to an integer.
This fixes evaluation of `linuxPackages_latest.virtualbox`
(the impetus for this commit)
and other packages that use lowPrio or hiPrio.
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I.e. append a suffix *before* the version, rather than after. So we
get "sqlite-interactive-3.8.0.2" instead of
"sqlite-3.8.0.2-interactive". The latter is broken since nix-env just
sees it the suffix as part of the version, so "nix-env -u" will
happily upgrade "sqlite-3.8.0.2-interactive" to "sqlite-3.9".
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Nix-env always wants to install all outputs of a derivation, but this
failed for openjdk/openjre because openjdk has some symlinks (such as
bin/java) to openjre. Also, it prevents installing the openjre
without the openjdk. So as a workaround, mess with the "outputs"
attribute to fool nix-env.
Also, give openjre a separate name and description.
Fixes #1535.
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attrsets with packages such as kde.
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