The per-version `default.nix`es just fill in default arguments. It is
much more useful to have the `.override` from the inner `callPackage`,
for finer control. Converting the outer `callPackage` to a plain import
makes the inner one the only one, revealing its `.override`.
Using a simple algorithm, convert the references to a path in to a
sorted list of dependent paths based on how often they're referenced
and how deep in the tree they live. Equally-"popular" paths are then
sorted by name.
The existing writeReferencesToFile prints the paths in a simple
ascii-based sorting of the paths.
Sorting the paths by graph improves the chances that the difference
between two builds appear near the end of the list, instead of near
the beginning. This makes a difference for Nix builds which export a
closure for another program to consume, if that program implements its
own level of binary diffing.
For an example, Docker Images. If each store path is a separate layer
then Docker Images can be very efficiently transfered between systems,
and we get very good cache reuse between images built with the same
version of Nixpkgs. However, since Docker only reliably supports a
small number of layers (42) it is important to pick the individual
layers carefully. By storing very popular store paths in the first 40
layers, we improve the chances that the next Docker image will share
many of those layers.*
Given the dependency tree:
A - B - C - D -\
\ \ \ \
\ \ \ \
\ \ - E ---- F
\- G
Nodes which have multiple references are duplicated:
A - B - C - D - F
\ \ \
\ \ \- E - F
\ \
\ \- E - F
\
\- G
Each leaf node is now replaced by a counter defaulted to 1:
A - B - C - D - (F:1)
\ \ \
\ \ \- E - (F:1)
\ \
\ \- E - (F:1)
\
\- (G:1)
Then each leaf counter is merged with its parent node, replacing the
parent node with a counter of 1, and each existing counter being
incremented by 1. That is to say `- D - (F:1)` becomes `- (D:1, F:2)`:
A - B - C - (D:1, F:2)
\ \ \
\ \ \- (E:1, F:2)
\ \
\ \- (E:1, F:2)
\
\- (G:1)
Then each leaf counter is merged with its parent node again, merging
any counters, then incrementing each:
A - B - (C:1, D:2, E:2, F:5)
\ \
\ \- (E:1, F:2)
\
\- (G:1)
And again:
A - (B:1, C:2, D:3, E:4, F:8)
\
\- (G:1)
And again:
(A:1, B:2, C:3, D:4, E:5, F:9, G:2)
and then paths have the following "popularity":
A 1
B 2
C 3
D 4
E 5
F 9
G 2
and the popularity contest would result in the paths being printed as:
F
E
D
C
B
G
A
* Note: People who have used a Dockerfile before assume Docker's
Layers are inherently ordered. However, this is not true -- Docker
layers are content-addressable and are not explicitly layered until
they are composed in to an Image.
Thanks to @symphorien for this work, which apart from the update itself
includes a few more fixes and cleanups.
I've tested building and running the upgraded Paperwork and while I
haven't done extensive testing on every little feature it seems to work
so far.
The changes also include an addition to fetchFromGitLab, which allows to
specify a group.
Merges: #46487
* needs at least qtgraphicaleffects not mentioned in docs
* doesn't want to use our libqmatrixclient, so let it use bundled
* took a few runs (or perhaps just patience with one) to populate,
when my profile icon appeared it seemed ready-- then click it
to see list of rooms and such.
- New dependency on 'getconf' binary for
3aa619e9ef/src/vm_memory_monitor.erl (L448)
- New dependency on 'socat' for systemd notifications
4a3ee3a336/src/rabbit.erl (L361)
- elixir_1_6 for a new 'rabbitmqctl' tool
- Replace patching with providing custom PATH, as we already have some
other things here
- Renamed package in all-packages.nix from a legacy spelling
This includes the initialy commit was done by @Mic92 plus a few fixes
from my side. So essentially this avoids patching statically linked
executables and also speeds up searching for ELF files altogether.
I've tested this by comparing the outputs of all the derivations which
make use of this hook using the following Nix expression:
let
getPackagesForRev = rev: with import (builtins.fetchGit {
url = ./.;
inherit rev;
}) { config.allowUnfree = true; }; [
cups-kyodialog3 elasticsearch franz gurobi javacard-devkit
masterpdfeditor maxx oracle-instantclient powershell reaper
teamviewer unixODBCDrivers.msodbcsql17 virtlyst wavebox zoom-us
];
pkgs = import <nixpkgs> {};
baseRev = "ef764eb0d8314b81a012dae04642b4766199956d";
in pkgs.runCommand "diff-contents" {
chset = pkgs.lib.zipListsWith (old: new: pkgs.runCommand "diff" {
inherit old new;
nativeBuildInputs = [ pkgs.nukeReferences ];
} ''
mkdir -p "''${NIX_STORE#/}"
cp --no-preserve=all -r "$old" "''${NIX_STORE#/}"
cp --no-preserve=all -r "$new" "''${NIX_STORE#/}"
find "''${old#/}" "''${new#/}" \
\( -type f -exec nuke-refs {} + \) -o \( -type l -delete \)
mkdir "$out"
echo "$old" > "$out/old-path"
echo "$new" > "$out/new-path"
diff -Nur "''${old#/}" "''${new#/}" > "$out/diff" || :
'') (getPackagesForRev baseRev) (getPackagesForRev "");
} ''
err=0
for c in $chset; do
if [ -s "$c/diff" ]; then
echo "$(< "$c/old-path") -> $(< "$c/new-path")" \
"differs, report: $c/diff" >&2
err=1
fi
done
[ $err -eq 0 ] && touch "$out"
''
With these changes there is only one derivation which has altered
contents, which is "franz". However the reason why it has differing
contents is not directly because of the autoPatchelfHook changes, but
because the "env-vars" file from the builder is in
"$out/opt/franz/env-vars" (Cc: @gnidorah) and we now have different
contents for NIX_CFLAGS_COMPILE and other environment variables.
I also tested this against a random static binary and the hook no longer
tries to patch it.
Merges: #47222
The compilers themselves can pull them from `bootPkgs`, where they
should always come from anyways. This enforces that, simplifies that
code, and allows use to avoid more `rec { ... }` too.
2a6e4ae49a and
e51f736076 reverted a bit too much, and I
initially missed this when reviewing. The release notes already still
mention this change, too.
This isn't necessary and causes build failures for certain versions.
CC libavfilter/libmpcodecs/vf_eq2.o
CC libavfilter/libmpcodecs/vf_fil.o
CC libavfilter/libmpcodecs/vf_fspp.o
libavfilter/libmpcodecs/vf_fspp.c:939:18: error: unknown token in expression
movq %mm2, 0*8+(%rsp)
/cc ZHF #45961
Add package libratbag and service module ratbagd
Libratbag contains ratbagd daemon and ratbagctl cli to configure
buttons, dpi, leds, etc. of gaming mice.
Add mvnetbiz to maintainers.
