mirror of
https://github.com/NixOS/nix
synced 2024-09-19 23:03:53 -04:00
84 lines
2.3 KiB
Bash
84 lines
2.3 KiB
Bash
source ../common.sh
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requireEnvironment () {
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requireSandboxSupport
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[[ $busybox =~ busybox ]] || skipTest "no busybox"
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if [[ $(uname) != Linux ]]; then skipTest "Need Linux for overlayfs"; fi
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needLocalStore "The test uses --store always so we would just be bypassing the daemon"
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}
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addConfig () {
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echo "$1" >> "$NIX_CONF_DIR/nix.conf"
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}
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setupConfig () {
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addConfig "require-drop-supplementary-groups = false"
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addConfig "build-users-group = "
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}
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enableFeatures "local-overlay-store"
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setupStoreDirs () {
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# Attempt to create store dirs on tmpfs volume.
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# This ensures lowerdir, upperdir and workdir will be on
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# a consistent filesystem that fully supports OverlayFS.
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storeVolume="$TEST_ROOT/stores"
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mkdir -p "$storeVolume"
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mount -t tmpfs tmpfs "$storeVolume" || true # But continue anyway if that fails.
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storeA="$storeVolume/store-a"
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storeBTop="$storeVolume/store-b"
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storeBRoot="$storeVolume/merged-store"
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storeB="local-overlay://?root=$storeBRoot&lower-store=$storeA&upper-layer=$storeBTop"
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# Creating testing directories
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mkdir -p "$storeVolume"/{store-a/nix/store,store-b,merged-store/nix/store,workdir}
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}
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# Mounting Overlay Store
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mountOverlayfs () {
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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="$storeVolume/workdir" \
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"$storeBRoot/nix/store" \
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|| skipTest "overlayfs is not supported"
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cleanupOverlay () {
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umount "$storeBRoot/nix/store"
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rm -r $storeVolume/workdir
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}
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trap cleanupOverlay EXIT
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}
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remountOverlayfs () {
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mount -o remount "$storeBRoot/nix/store"
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}
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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:-/nix/store}^^")
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}
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initLowerStore () {
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# Init lower store with some stuff
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nix-store --store "$storeA" --add ../dummy
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# Build something in lower store
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drvPath=$(nix-instantiate --store $storeA ../hermetic.nix --arg busybox "$busybox" --arg seed 1)
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path=$(nix-store --store "$storeA" --realise $drvPath)
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}
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execUnshare () {
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exec unshare --mount --map-root-user "$SHELL" "$@"
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}
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addTextToStore() {
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storeDir=$1; shift
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filename=$1; shift
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content=$1; shift
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filePath="$TEST_HOME/$filename"
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echo "$content" > "$filePath"
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nix-store --store "$storeDir" --add "$filePath"
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}
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