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author | Linus Heckemann <git@sphalerite.org> | 2017-07-12 22:04:49 +0100 |
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committer | Linus Heckemann <git@sphalerite.org> | 2017-07-13 06:30:24 +0100 |
commit | 77ce02201e1bc7facabb774d7e9996ab803145d2 (patch) | |
tree | a860b416c291711cdbe6be8b97ea7b45d61ff194 /nixos/modules/installer/tools | |
parent | 8b1f1d93fa8e3524e0e01378dbe813e6eb06712e (diff) | |
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nixos-install: use FIFO for system closure
This avoids running out of space in space-constrained environments, e.g. VMs with relatively small amounts of memory and tmp on tmpfs
Diffstat (limited to 'nixos/modules/installer/tools')
-rw-r--r-- | nixos/modules/installer/tools/nixos-install.sh | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/nixos/modules/installer/tools/nixos-install.sh b/nixos/modules/installer/tools/nixos-install.sh index 7fae915871e4..79ed18c923c0 100644 --- a/nixos/modules/installer/tools/nixos-install.sh +++ b/nixos/modules/installer/tools/nixos-install.sh @@ -126,6 +126,9 @@ function closure() { } system_closure="$tmpdir/system.closure" +# Use a FIFO for piping nix-store --export into nix-store --import, saving disk +# I/O and space. nix-store --import is run by nixos-prepare-root. +mkfifo $system_closure if [ -z "$closure" ]; then expr="(import <nixpkgs/nixos> {}).system" @@ -135,7 +138,9 @@ else system_root=$closure # Create a temporary file ending in .closure (so nixos-prepare-root knows to --import it) to transport the store closure # to the filesytem we're preparing. Also delete it on exit! - nix-store --export $(nix-store -qR $closure) > $system_closure + # Run in background to avoid blocking while trying to write to the FIFO + # $system_closure refers to + nix-store --export $(nix-store -qR $closure) > $system_closure & fi channel_root="$(nix-env -p /nix/var/nix/profiles/per-user/root/channels -q nixos --no-name --out-path 2>/dev/null || echo -n "")" |