install-multi-user: Detect and fail lack of systemd separately #2745
Conversation
Otherwise, the user is shown: ``` Sorry, I don't know what to do on Linux ``` Which is... not exactly right.
| # shellcheck source=./install-systemd-multi-user.sh | ||
| . "$EXTRACTED_NIX_PATH/install-systemd-multi-user.sh" | ||
| else | ||
| failure "Sorry, the multi-user installation requires systemd on Linux (detected using /run/systemd/system)" |
There was a problem hiding this comment.
I would prefer saying «requires systemd on Linux, or manual installation of the Nix daemon» — multi-user Nix with daemon and sandboxing works perfectly without systemd after initial setup, and this message can be misunderstood to imply otherwise.
Actually, the part that needs systemd — starting nix-daemon — is the easy part, and build user creation is the more complicated and annoying part, so it would be nice to have an option to do the entire multi-user install except the systemd part, but that's definitely out of scope.
There was a problem hiding this comment.
I agree. @grahamc any other opinion to make the best error message? It needs to
- Explain why it failed (systemd missing) which is almost fine.
- What alternatives there are.
Sorry, the multi-user installation requires systemd on Linux, or manual installation of the Nix daemon.
The lack of systemd was detected by missing the /run/systemd/system directory.
Nix can be configured manually to work in multi-user mode with other init systems. [???]
Though, I'm unsure we have the required documentation to refer the user to.
Additionally, if we want to start breaking out the other "annoying parts" as you describe, it might be a good starting point, install.sh --daemon --without-init could use everything not related to systemd, allowing a bit more agnosticism in the installation, declaring that "yes, continue without init configuration support". (Though, all of this into another feature request.)
Otherwise, the user is shown:
Which is... not exactly right.
See
cc @grahamc install script afficionado.