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Pimp nixredo-gc to work around broken gcroots in local store 

Add fake gcroots which have the right looks when running GC. Remove them after
GC finished.
master
Michael Raitza 2021-02-17 14:04:46 +01:00
parent 52f6a2badf
commit 034aa74e81
2 changed files with 23 additions and 1 deletions
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3
default.nix
View File

@ -1,4 +1,4 @@
{ stdenv, jq }: { stdenv, findutils, jq }:
stdenv.mkDerivation { stdenv.mkDerivation {
name = "nixredo-1"; name = "nixredo-1";
@ -8,6 +8,7 @@ stdenv.mkDerivation {
libnix = ./lib.nix; libnix = ./lib.nix;
files = [ ./nixredo ./nixredo-deps ./nixredo-whichdo ./nixredo-gc ]; files = [ ./nixredo ./nixredo-deps ./nixredo-whichdo ./nixredo-gc ];
find = "${findutils}/bin/find";
installPhase = '' installPhase = ''
mkdir -p $out/bin mkdir -p $out/bin

21
nixredo-gc
View File

@ -1,3 +1,24 @@
#!/bin/sh #!/bin/sh
[ "${S+x}" = x ] || { printf "Set S to the root location of your source tree\n"; exit 127; }
[ "${NIXREDO_ROOT+x}" = x ] || { printf "$0 only runs for private a nix store. Set NIXREDO_ROOT to a non-empty value\n"; exit 127; } [ "${NIXREDO_ROOT+x}" = x ] || { printf "$0 only runs for private a nix store. Set NIXREDO_ROOT to a non-empty value\n"; exit 127; }
# Work around broken GCROOT support in local stores
# Add a fake gcroot which points to /nix/store/... instead of <local/store>/nix/store
# Remove fake roots after gc
roots=
mkdir -p "${NIXREDO_ROOT}/nix/var/nix/gcroots/auto"
for f in $(@find@ "$S" -path "${NIXREDO_ROOT}" -prune -o -type l -print) ; do
p=$(realpath "$f")
if [ "${p#${NIXREDO_ROOT}}" != "$p" ]; then
gcroot=$(mktemp -u -p "${NIXREDO_ROOT}/nix/var/nix/gcroots/auto")
ln -s "${p#${NIXREDO_ROOT}}" "$gcroot"
roots="${roots} ${gcroot}"
fi
done
nix-store --store "${NIXREDO_ROOT}" --gc nix-store --store "${NIXREDO_ROOT}" --gc
rm -rf -- "${NIXREDO_ROOT}/tmp"
for f in $roots; do
rm -- "$f"
done