Add --install option for nixos-option which is used to handle options of

the target system (when installing) and also to generate a template
configuration file for users.

svn path=/nixos/trunk/; revision=23923
This commit is contained in:
Nicolas Pierron 2010-09-25 22:29:50 +00:00
parent 58ce746eb0
commit 7ea957fd3d

View file

@ -2,15 +2,17 @@
# Allow the location of NixOS sources and the system configuration
# file to be overridden.
: ${mountPoint=/mnt}
: ${NIXOS_PATH=/etc/nixos/nixos}
: ${NIXOS=/etc/nixos/nixos}
: ${NIXPKGS=/etc/nixos/nixpkgs}
: ${NIXOS_CONFIG=/etc/nixos/configuration.nix}
: ${NIXPKGS=/etc/nixos/nixpkgs}
export NIXOS_PATH
usage () {
echo 1>&2 "
Usage: $0 OPTION_NAME [-v] [-d] [-l]
Usage: $0 [--install] [-v] [-d] [-l] OPTION_NAME
$0 [--install]
This program is used to explore NixOS options by looking at their values or
by looking at their description. It is helpful for understanding the how
@ -18,6 +20,11 @@ your configuration is working.
Options:
-i | --install Use the configuration on
${mountPoint:+$mountPoint/}$NIXOS_CONFIG instead of
the current system configuration. Generate a
template configuration if no option name is
specified.
-v | --value Display the current value, based on your
configuration.
-d | --default Display the default value, the example and the
@ -26,8 +33,9 @@ Options:
is declared.
--help Show this message.
Environment variables affecting nixos-option:
Environment variables affecting $0:
\$mountPoint Path to the target file system.
\$NIXOS_PATH Path where the NixOS repository is located.
\$NIXOS_CONFIG Path to your configuration file.
\$NIXPKGS Path to Nix packages.
@ -44,6 +52,7 @@ Environment variables affecting nixos-option:
desc=false
defs=false
value=false
install=false
verbose=false
option=""
@ -52,18 +61,39 @@ argfun=""
for arg; do
if test -z "$argfun"; then
case $arg in
-d|--description) desc=true;;
-v|--value) value=true;;
-l|--lookup) defs=true;;
--verbose) verbose=true;;
--help) usage;;
-*) usage;;
*) if test -z "$option"; then
option="$arg"
else
usage
fi;;
-*)
longarg=""
sarg="$arg"
while test "$sarg" != "-"; do
case $sarg in
--*) longarg=$arg;;
-d*) longarg="$longarg --description";;
-v*) longarg="$longarg --value";;
-l*) longarg="$longarg --lookup";;
-i*) longarg="$longarg --install";;
-*) usage;;
esac
sarg="-${sarg#??}"
done
;;
*) longarg=$arg;;
esac
for larg in $longarg; do
case $larg in
--description) desc=true;;
--value) value=true;;
--lookup) defs=true;;
--install) install=true;;
--verbose) verbose=true;;
--help) usage;;
-*) usage;;
*) if test -z "$option"; then
option="$larg"
else
usage
fi;;
esac
done
else
case $argfun in
set_*)
@ -75,6 +105,16 @@ for arg; do
fi
done
# --install cannot be used with -d -v -l without option name.
if $value || $desc || $defs && $install && test -z "$option"; then
usage
fi
generate=false
if ! $defs && ! $desc && ! $value && $install && test -z "$option"; then
generate=true
fi
if ! $defs && ! $desc; then
value=true
fi
@ -111,7 +151,130 @@ findSources(){
nix-instantiate - --eval-only --strict
}
if $install; then
if test -e "$mountPoint$NIXOS_PATH"; then
export NIXOS_PATH="$mountPoint$NIXOS_PATH"
fi
if test -e "$mountPoint$NIXPKGS"; then
export NIXPKGS="$mountPoint$NIXPKGS"
fi
export NIXOS_CONFIG="$mountPoint$NIXOS_CONFIG"
fi
if $generate; then
mkdir -p $(dirname "$NIXOS_CONFIG")
# Scan the hardware and add the result to /etc/nixos/hardware-scan.nix.
hardware_config="${NIXOS_CONFIG%/configuration.nix}/hardware-configuration.nix"
if test -e "$hardware_config"; then
echo "A hardware configuration file exists, generation skipped."
else
echo "Scan your hardware to generate a hardware configuration file."
nixos-hardware-scan > "$hardware_config"
fi
if test -e "$NIXOS_CONFIG"; then
echo 1>&2 "error: Cannot generate a template configuration because a configuration file exists."
exit 1
fi
echo "Generate a template configuration that you should edit."
# Generate a template configuration file where the user has to
# fill the gaps.
echo > "$NIXOS_CONFIG" \
'# Edit this configuration file which defines what would be installed on the
# system. To Help while choosing option value, you can watch at the manual
# page of configuration.nix or at the last chapter of the manual available
# on the virtual console 8 (Alt+F8).
{config, pkgs, ...}:
{
require = [
# Include the configuration for part of your system which have been
# detected automatically. In addition, it includes the same
# configuration as the installation device that you used.
./hardware-configuration.nix
];
boot.initrd.kernelModules = [
# Specify all kernel modules that are necessary for mounting the root
# file system.
#
# "ext4" "ata_piix"
];
boot.loader.grub = {
# Use grub 2 as boot loader.
enable = true;
version = 2;
# Define on which hard drive you want to install Grub.
# device = "/dev/sda";
};
networking = {
# hostName = "nixos"; # Define your hostname.
interfaceMonitor.enable = true; # Watch for plugged cable.
enableWLAN = true; # Enables Wireless.
};
# Add file system entries for each partition that you want to see mounted
# at boot time. You can add filesystems which are not mounted at boot by
# adding the noauto option.
fileSystems = [
# Mount the root file system
#
# { mountPoint = "/";
# device = "/dev/sda2";
# }
# Copy & Paste & Uncomment & Modify to add any other file system.
#
# { mountPoint = "/data"; # where you want to mount the device
# device = "/dev/sdb"; # the device or the label of the device
# # label = "data";
# fsType = "ext3"; # the type of the partition.
# options = "data=journal";
# }
];
swapDevices = [
# List swap partitions that are mounted at boot time.
#
# { device = "/dev/sda1"; }
];
# Select internationalisation properties.
# i18n = {
# consoleFont = "lat9w-16";
# consoleKeyMap = "us";
# defaultLocale = "en_US.UTF-8";
# };
# List services that you want to enable:
# Add an OpenSSH daemon.
# services.openssh.enable = true;
# Add CUPS to print documents.
# services.printing.enable = true;
# Add XServer (default if you have used a graphical iso)
# service.xserver = {
# enable = true;
# layout = "us";
# xkbOptions = "eurosign:e";
# };
# Add the NixOS Manual on virtual console 8
services.nixosManual.showManual = true;
}
'
exit 0
fi;
if test "$(evalOpt "_type" 2> /dev/null)" = '"option"'; then
$value && evalCfg;