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https://github.com/NixOS/nix.git
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89 lines
2.3 KiB
Bash
Executable file
89 lines
2.3 KiB
Bash
Executable file
#!/usr/bin/env bash
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set -eu -o pipefail
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set -x
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source common.sh
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export NIX_CONFIG='build-users-group = '
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# Creating testing directories
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storeA="$TEST_ROOT/store-a"
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storeBTop="$TEST_ROOT/store-b"
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storeB="local-overlay?root=$TEST_ROOT/merged-store&lower-store=$storeA&upper-layer=$storeBTop"
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mkdir -p "$TEST_ROOT"/{store-a,store-b,merged-store/nix/store,workdir}
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# Mounting Overlay Store
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# Init lower store with some stuff
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nix-store --store "$storeA" --add dummy
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# Build something in lower store
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path=$(nix-build ./hermetic.nix --arg busybox "$busybox" --arg seed 1 --store "$storeA")
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mount -t overlay overlay \
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-o lowerdir="$storeA/nix/store" \
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-o upperdir="$storeBTop" \
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-o workdir="$TEST_ROOT/workdir" \
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"$TEST_ROOT/merged-store/nix/store" \
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|| skipTest "overlayfs is not supported"
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cleanupOverlay () {
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umount "$TEST_ROOT/merged-store/nix/store"
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rm -r $TEST_ROOT/workdir
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}
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trap cleanupOverlay EXIT
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toRealPath () {
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storeDir=$1; shift
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storePath=$1; shift
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echo $storeDir$(echo $storePath | sed "s^$NIX_STORE_DIR^^")
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}
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### Check status
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# Checking for path in lower layer
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stat $(toRealPath "$storeA/nix/store" "$path")
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# Checking for path in upper layer (should fail)
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expect 1 stat $(toRealPath "$storeBTop" "$path")
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# Checking for path in overlay store matching lower layer
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diff $(toRealPath "$storeA/nix/store" "$path") $(toRealPath "$TEST_ROOT/merged-store/nix/store" "$path")
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# Verifying path in lower layer
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nix-store --verify-path --store "$storeA" "$path"
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# Verifying path in merged-store
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nix-store --verify-path --store "$storeB" "$path"
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### Do a redundant add
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# upper layer should not have it
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expect 1 stat $(toRealPath "$storeBTop/nix/store" "$path")
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path=$(nix-store --store "$storeB" --add dummy)
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# lower store should have it from before
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stat $(toRealPath "$storeA/nix/store" "$path")
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# upper layer should still not have it (no redundant copy)
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expect 1 stat $(toRealPath "$storeB/nix/store" "$path")
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## Ooops something went wrong
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## ### Do a build in overlay store
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##
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## path=$(nix-build ./hermetic.nix --arg busybox $busybox --arg seed 2 --store "$storeB")
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##
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## # Checking for path in lower layer (should fail)
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## expect 1 stat $(toRealPath "$storeA/nix/store" "$path")
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##
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## # Checking for path in upper layer
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## stat $(toRealPath "$storeBTop" "$path")
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##
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## # Verifying path in overlay store
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## nix-store --verify-path --store "$storeB" "$path"
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