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nixos-rebuild: Let --help invoke "man nixos-rebuild"
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#! @shell@ -e
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showSyntax() {
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# !!! more or less cut&paste from
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# system/switch-to-configuration.sh (which we call, of course).
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cat <<EOF
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Usage: $0 [OPTIONS...] OPERATION
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The operation is one of the following:
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switch: make the configuration the boot default and activate now
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boot: make the configuration the boot default
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test: activate the configuration, but don't make it the boot default
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build: build the configuration, but don't make it the default or
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activate it
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build-vm: build a virtual machine containing the configuration
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(useful for testing)
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build-vm-with-bootloader:
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like build-vm, but include a boot loader in the VM
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dry-run: just show what store paths would be built/downloaded
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Options:
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--upgrade fetch the latest version of NixOS before rebuilding
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--install-grub (re-)install the Grub bootloader
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--no-build-nix don't build the latest Nix from Nixpkgs before
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building NixOS
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--rollback restore the previous NixOS configuration (only
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with switch, boot, test, build)
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--profile-name / -p install in the specified system profile
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--fast same as --no-build-nix --show-trace
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Various nix-build options are also accepted, in particular:
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--show-trace show a detailed stack trace for evaluation errors
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Environment variables affecting nixos-rebuild:
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\$NIX_PATH Nix expression search path
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\$NIXOS_CONFIG path to the NixOS system configuration specification
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EOF
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exec man nixos-rebuild
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exit 1
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}
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