mirror of
https://github.com/nix-community/nixos-generators.git
synced 2024-11-25 19:07:59 +03:00
130 lines
2.5 KiB
Plaintext
Executable File
130 lines
2.5 KiB
Plaintext
Executable File
#!/usr/bin/env nix-shell
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#! nix-shell -i bash -p jq
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set -euo pipefail
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## Configuration
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readonly libexec_dir="${0%/*}"
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readonly format_dir=$libexec_dir/formats
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configuration=${NIXOS_CONFIG:-$libexec_dir/configuration.nix}
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format_path=
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target_system=
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cores=
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run=
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nix_args=(
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"$libexec_dir/nixos-generate.nix"
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)
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## Functions
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showUsage() {
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cat <<USAGE
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Usage: $0 [options]
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Options:
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* --help: shows this help
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* -c, --configuration PATH:
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select the nixos configuration to build. Default: $configuration
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* -f, --format NAME: select one of the pre-determined formats
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* --format-path PATH: pass a custom format
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* --list: list the available built-in formats
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* --run: runs the configuration in a VM
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only works for the "vm" and "vm-no-gui" formats
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* --system: specify the target system (eg: x86_64-linux)
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* --cores : to control the maximum amount of parallelism. (see nix-build documentation)
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* -I KEY=VALUE: Add a key to the Nix expression search path.
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USAGE
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}
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listFormats() {
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for format in "$format_dir"/*.nix; do
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basename "$format" ".nix"
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done
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}
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abort() {
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echo "aborted: $*" >&2
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exit 1
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}
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## Main ##
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while [[ $# -gt 0 ]]; do
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case "$1" in
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-c | --configuration)
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configuration=$2
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shift
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;;
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--cores)
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cores=$2
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shift
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;;
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-f | --format)
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format_path=$format_dir/$2.nix
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shift
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;;
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--format-path)
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format_path=$2
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shift
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;;
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--help)
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showUsage
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exit
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;;
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--list)
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listFormats
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exit
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;;
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--run)
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run=1
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# default to the VM format
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if [[ -z $format_path ]]; then
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format_path=$format_dir/vm.nix
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fi
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;;
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--system)
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target_system=$2
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shift
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;;
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-I)
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nix_args+=(-I "$2")
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shift
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;;
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*)
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abort "unknown option $1"
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;;
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esac
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shift
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done
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if [[ -z $format_path ]]; then
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abort "missing format. use --help for more details"
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fi
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nix_args+=(
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-I "nixos-config=$configuration"
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-I "format-config=$format_path"
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)
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if [[ -n $target_system ]]; then
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nix_args+=(--argstr system "$target_system")
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fi
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if [[ -n $cores ]]; then
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nix_args+=(--cores "$cores")
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fi
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formatAttr=$(nix-instantiate "${nix_args[@]}" --eval --json -A config.formatAttr | jq -r .)
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out=$(nix-build "${nix_args[@]}" --no-out-link -A "config.system.build.$formatAttr")
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if [[ -z $run ]]; then
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# show the first file, ignoring nix-support
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find "$out" -path "$out/nix-support" -prune -o -type f -print -quit
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else
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runner=$(find "$out"/bin -type l -print -quit)
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exec "$runner"
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fi
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