forked from lix-project/lix
6644b6099b
This exploits the hermetic nature of flake evaluation to speed up repeated evaluations of a flake output attribute. For example (doing 'nix build' on an already present package): $ time nix build nixpkgs:firefox real 0m1.497s user 0m1.160s sys 0m0.139s $ time nix build nixpkgs:firefox real 0m0.052s user 0m0.038s sys 0m0.007s The cache is ~/.cache/nix/eval-cache-v1.sqlite, which has entries like INSERT INTO Attributes VALUES( X'92a907d4efe933af2a46959b082cdff176aa5bfeb47a98fabd234809a67ab195', 'packages.firefox', 1, '/nix/store/pbalzf8x19hckr8cwdv62rd6g0lqgc38-firefox-67.0.drv /nix/store/g6q0gx0v6xvdnizp8lrcw7c4gdkzana0-firefox-67.0 out'); where the hash 92a9... is a fingerprint over the flake store path and the contents of the lockfile. Because flakes are evaluated in pure mode, this uniquely identifies the evaluation result. |
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.. | ||
add-to-store.cc | ||
build.cc | ||
cat.cc | ||
command.cc | ||
command.hh | ||
copy.cc | ||
doctor.cc | ||
dump-path.cc | ||
edit.cc | ||
eval.cc | ||
flake-template.nix | ||
flake.cc | ||
hash.cc | ||
installables.cc | ||
legacy.cc | ||
legacy.hh | ||
local.mk | ||
log.cc | ||
ls.cc | ||
main.cc | ||
optimise-store.cc | ||
path-info.cc | ||
ping-store.cc | ||
progress-bar.cc | ||
progress-bar.hh | ||
repl.cc | ||
run.cc | ||
search.cc | ||
shell.cc | ||
show-config.cc | ||
show-derivation.cc | ||
sigs.cc | ||
upgrade-nix.cc | ||
verify.cc | ||
why-depends.cc |