Rovanion Luckey a413594baf installer: Handle edge case where the nix-daemon is already running on the system ... On a systemd-based Linux distribution: If the user has previously had multi-user Nix installed on the system, removed it and then reinstalled multi-user Nix again the old nix-daemon.service will still be running when `scripts/install-systemd-multi-user.sh` tries to start it which results in nothing being done and the old daemon continuing its run. When a normal user then tries to use Nix through the daemon the nix binary will fail to connect to the nix-daemon as it does not belong to the currently installed Nix system. See below for steps to reproduce the issue that motivated this change. $ sh <(curl https://nixos.org/nix/install) --daemon $ sudo rm -rf /etc/nix /nix /root/.nix-profile /root/.nix-defexpr /root/.nix-channels /home/nix-installer/.nix-profile /home/nix-installer/.nix-defexpr /home/nix-installer/.nix-channels ~/.nix-channels ~/.nix-defexpr/ ~/.nix-profile /etc/profile.d/nix.sh.backup-before-nix /etc/profile.d/nix.sh; sed -i '/added by Nix installer$/d' ~/.bash_profile $ unset NIX_REMOTE $ sh <(curl https://nixos.org/nix/install) --daemon └$ export NIX_REMOTE=daemon └$ nix-env -iA nixpkgs.hello installing 'hello-2.10' error: cannot connect to daemon at '/nix/var/nix/daemon-socket/socket': No such file or directory (use '--show-trace' to show detailed location information) └$ sudo systemctl restart nix-daemon.service └$ nix-env -iA nixpkgs.hello installing 'hello-2.10' these paths will be fetched (6.09 MiB download, 27.04 MiB unpacked): /nix/store/2g75chlbpxlrqn15zlby2dfh8hr9qwbk-hello-2.10 /nix/store/aag9d1y4wcddzzrpfmfp9lcmc7skd7jk-glibc-2.27 copying path '/nix/store/aag9d1y4wcddzzrpfmfp9lcmc7skd7jk-glibc-2.27' from 'https://cache.nixos.org'... copying path '/nix/store/2g75chlbpxlrqn15zlby2dfh8hr9qwbk-hello-2.10' from 'https://cache.nixos.org'... building '/nix/store/w9adagg6vlikr799nkkqc9la5hbbpgmi-user-environment.drv'... created 2 symlinks in user environment		2020-01-23 14:48:53 +01:00
..
install-darwin-multi-user.sh	Copy instead of linking launch agent	2019-10-08 21:52:17 -04:00
install-multi-user.sh	install-multi-user.sh: Remove unused variables	2019-10-23 21:24:21 +02:00
install-nix-from-closure.sh	Pass -P to cp to preserve symlinks	2019-12-21 21:30:38 -08:00
install-systemd-multi-user.sh	installer: Handle edge case where the nix-daemon is already running on the system	2020-01-23 14:48:53 +01:00
install.in	Pass -J to tar for xz decompression	2019-12-22 17:17:14 -08:00
local.mk	Pull nix-profile-daemon from 1.11	2017-10-16 14:51:39 -04:00
nix-http-export.cgi.in
nix-profile-daemon.sh.in	Provide a default value for NIX_PATH	2019-11-22 22:08:51 +01:00
nix-profile.sh.in	Provide a default value for NIX_PATH	2019-11-22 22:08:51 +01:00
nix-reduce-build.in