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dockerTools.buildImageWithNixDb: simplifications #39716

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32 changes: 4 additions & 28 deletions pkgs/build-support/docker/default.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -10,8 +10,7 @@
lib,
pkgs,
pigz,
nixUnstable,
perl,
nix,
runCommand,
rsync,
shadow,
Expand All @@ -22,6 +21,7 @@
writeReferencesToFile,
writeScript,
writeText,
closureInfo
}:

# WARNING: this API is unstable and may be subject to backwards-incompatible changes in the future.
Expand Down Expand Up @@ -228,19 +228,6 @@ rec {
${text}
'';

nixRegistration = contents: runCommand "nix-registration" {
buildInputs = [ nixUnstable perl ];
# For obtaining the closure of `contents'.
exportReferencesGraph =
let contentsList = if builtins.isList contents then contents else [ contents ];
in map (x: [("closure-" + baseNameOf x) x]) contentsList;
}
''
mkdir $out
printRegistration=1 perl ${pkgs.pathsFromGraph} closure-* > $out/db.dump
perl ${pkgs.pathsFromGraph} closure-* > $out/storePaths
'';

# Create a "layer" (set of files).
mkPureLayer = {
# Name of the layer
Expand Down Expand Up @@ -579,20 +566,9 @@ rec {
echo "Warning: only the database of the deepest Nix layer is loaded."
echo " If you want to use nix commands in the container, it would"
echo " be better to only have one layer that contains a nix store."
# This requires Nix 1.12 or higher

export NIX_REMOTE=local?root=$PWD
${nixUnstable}/bin/nix-store --load-db < ${nixRegistration contents}/db.dump

# We fill the store in order to run the 'verify' command that
# generates hash and size of output paths.
# Note when Nix 1.12 is be the stable one, the database dump
# generated by the exportReferencesGraph function will
# contains sha and size. See
# https://github.com/NixOS/nix/commit/c2b0d8749f7e77afc1c4b3e8dd36b7ee9720af4a
storePaths=$(cat ${nixRegistration contents}/storePaths)
echo "Copying everything to /nix/store (will take a while)..."
cp -prd $storePaths nix/store/
${nixUnstable}/bin/nix-store --verify --check-contents
${nix}/bin/nix-store --load-db < ${closureInfo {rootPaths = contents;}}/registration

mkdir -p nix/var/nix/gcroots/docker/
for i in ${lib.concatStringsSep " " contents}; do
Expand Down