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#!/usr/bin/env bash
source $(dirname ${BASH_SOURCE[0]})/nix-utils.sh
CONFIG_DIR=
COMMAND="switch"
usage() {
cat <<EOS
$(help_synopsis "${BASH_SOURCE[0]}" \
"[-h] [-q] [-c <command>] [-w <working directory>]")
-c <command> Command for nixos-rebuild.
See 'man nixos-rebuild' (default: switch)
-w <path> Path to your configuration git directory
(default: '$RC_CONFIG')
-n DON'T include hostname in tag name
-t <tagname> Custom tag name
-C Append channel generation in tag (<tag>-channel-<gen>-<sha1>)
Expl:
<tag> : nixos-<hostname>
<gen> : Number of the generation
<sha1>: SHA1 (abbrev) of the commit of the channel in nixpkgs
-p [<pkgs>] Generate the switch tag in the nixpkgs at <pkgs>
as well. (default: '$RC_NIXPKGS')
(Warning: deprecated
This flag is deprecated as tagging with the channel
commit hash is now default
)
-r [<remote>] Update the <remote> in the <pkgs> before tagging.
Multiple possible, seperate with spaces.
Does nothing if -p is not passed.
(nixpkgs default: '$RC_NIXPKGS', remote default: '$RC_SWITCH_UPSTREAM_NIXPKGS_REMOTE_NAME')
-f <tag-flags> Flags for git-tag (see 'git tag --help')
(default: '$RC_SWITCH_DEFAULT_TAG_FLAGS')
-b Do not call nixos-rebuild at all.
-q Don't pass -Q to nixos-rebuild
-s <pkgs> Use these nixpkgs clone instead of channels
-h Show this help and exit
This command helps you rebuilding your system and keeping track
of the system generation in the git directory where your
configuration.nix lives. It generates a tag for each sucessfull
build of a system. So everytime you rebuild your system, this
script creates a tag for you, so you can revert your
configuration.nix to the generation state.
Example usage:
# To rebuild the system with "nixos-rebuild switch" (by -c
# switch), tag in /home/me/config and include the hostname
# in the tag as well (helpful if your configuration is
# shared between hosts).
# Verbosity is on here.
nix-script -v switch -c switch -w /home/me/config -n
This command does not generate a tag in the configuration if
the command is "build". A tag in the nixpkgs clone can be
generated, though.
$(help_rcvars \
"RC_CONFIG - Path of your system configuration (git) directory"\
"RC_NIXPKGS - Path of your nixpkgs clone" \
"RC_SWITCH_DEFAULT_TAG_FLAGS - Default git-tag flags for tagging in system configuration (git) directory"\
"RC_SWITCH_DEFAULT_TAG_FLAGS_NIXPKGS - Default git-tag flags for tagging in nixpkgs"\
"RC_SWITCH_UPSTREAM_NIXPKGS_REMOTE_NAME - Default git-remote name for the upstream nixpkgs"
)
$(help_end "${BASH_SOURCE[0]}")
EOS
}
COMMAND=switch
ARGS=
WD=$RC_CONFIG
TAG_NAME=
APPEND_CHANNEL_GEN=
HOSTNAME="$(hostname)"
TAG_NIXPKGS=0
NIXPKGS=$RC_NIXPKGS
TAG_FLAGS="$RC_SWITCH_DEFAULT_TAG_FLAGS"
TAG_FLAGS_NIXPKGS="$RC_SWITCH_DEFAULT_TAG_FLAGS_NIXPKGS"
DO_UPSTREAM_UPDATE=0
UPSTREAM_REMOTE="$RC_SWITCH_UPSTREAM_NIXPKGS_REMOTE_NAME"
DONT_BUILD=
QUIET=1
USE_ALTERNATIVE_SOURCE_NIXPKGS=0
while getopts "c:w:t:Cnbp:f:qs:r:h" OPTION
do
case $OPTION in
c)
COMMAND=$OPTARG
dbg "COMMAND = $COMMAND"
;;
w)
WD=$OPTARG
dbg "WD = $WD"
;;
t)
TAG_NAME=$OPTARG
dbg "TAG_NAME = $TAG_NAME"
;;
C)
APPEND_CHANNEL_GEN=1
dbg "APPEND_CHANNEL_GEN = $APPEND_CHANNEL_GEN"
;;
n)
HOSTNAME=""
dbg "HOSTNAME = $HOSTNAME"
;;
p)
if [[ ! -z "$OPTARG" ]]
then
NIXPKGS=$OPTARG
fi
TAG_NIXPKGS=1
dbg "TAG_NIXPKGS = $TAG_NIXPKGS"
;;
f)
TAG_FLAGS=$OPTARG
dbg "TAG_FLAGS = $TAG_FLAGS"
;;
b)
DONT_BUILD=1
dbg "DONT_BUILD = $DONT_BUILD"
;;
q)
QUIET=0
dbg "QUIET = $QUIET"
;;
s)
USE_ALTERNATIVE_SOURCE_NIXPKGS=1
ALTERNATIVE_SOURCE_NIXPKGS="$OPTARG"
dbg "USE_ALTERNATIVE_SOURCE_NIXPKGS = $USE_ALTERNATIVE_SOURCE_NIXPKGS"
dbg "ALTERNATIVE_SOURCE_NIXPKGS = $ALTERNATIVE_SOURCE_NIXPKGS"
;;
r)
DO_UPSTREAM_UPDATE=1
if [[ -z "$OPTARG" ]]; then
dbg "Using default upstream"
else
UPSTREAM_REMOTE="$OPTARG"
fi
dbg "DO_UPSTREAM_UPDATE = $DO_UPSTREAM_UPDATE"
dbg "UPSTREAM_REMOTE = '$UPSTREAM_REMOTE'"
;;
h)
usage
exit 1
;;
esac
done
ARGS=$(echo $* | sed -r 's/(.*)(\-\-(.*)|$)/\2/')
dbg "ARGS = $ARGS"
[[ -z "$WD" ]] && \
stderr "No configuration git directory." && \
stderr "Won't do anything" && exit 1
[[ ! -d "$WD" ]] && stderr "No directory: $WD" && exit 1
TAG_TARGET=$(__quiet__ __git "$WD" rev-parse HEAD)
stdout "Tag in config will be generated at '$TAG_TARGET'"
if [[ -z "$DONT_BUILD" ]]
then
__q="-Q"
[[ $QUIET -eq 0 ]] && __q=""
__altnixpkgs=""
[[ $USE_ALTERNATIVE_SOURCE_NIXPKGS -eq 1 ]] && \
[[ -d "$ALTERNATIVE_SOURCE_NIXPKGS" ]] && \
__altnixpkgs="-I nixpkgs=$ALTERNATIVE_SOURCE_NIXPKGS"
explain sudo nixos-rebuild $__q $COMMAND $ARGS $__altnixpkgs
REBUILD_EXIT=$?
else
stdout "Do not call nixos-rebuild"
REBUILD_EXIT=0
fi
[[ ! $REBUILD_EXIT -eq 0 ]] && \
stderr "Switching failed. Won't executing any further commands." && \
exit $REBUILD_EXIT
LASTGEN=$(current_system_generation)
sudo -k
stdout "sudo -k succeeded"
stdout "Last generation was: $LASTGEN"
if [[ -z "$TAG_NAME" ]]
then
if [[ -z "$HOSTNAME" ]]; then TAG_NAME="nixos-$LASTGEN-$COMMAND"
else TAG_NAME="nixos-$HOSTNAME-$LASTGEN-$COMMAND"
fi
fi
if [[ $APPEND_CHANNEL_GEN -eq 1 ]]; then
dbg "Appending channel generation to tag name"
commit=$(nixos-version | sed -r 's,(.*)\.(.*)\ (.*),\2,')
TAG_NAME="${TAG_NAME}-channel-$(current_channel_generation)-${commit}"
dbg "TAG_NAME = $TAG_NAME"
else
dbg "Not appending channel generation to tag name"
fi
if [[ "$COMMAND" =~ "build" ]]
then
stdout "Command is 'build'. Not generating config tag"
else
__git "$WD" tag $TAG_FLAGS "$TAG_NAME" "$TAG_TARGET"
fi
if [[ $TAG_NIXPKGS -eq 1 ]]
then
if [[ ! -z "$NIXPKGS" ]]
then
stderr "This option is deprecated."
stderr "Therefor it might be removed in the next version."
stderr "Please complain in the official nixos-scripts repository."
stdout "Trying to generate tag in $NIXPKGS"
[[ ! -d "$NIXPKGS" ]] && \
stderr "'$NIXPKGS' is not a directory, so can't be a nixpkgs clone" && \
exit 1
commit=$(nixos-version | sed -r 's,(.*)\.(.*)\ (.*),\2,')
if [[ $DO_UPSTREAM_UPDATE -eq 1 ]]
then
dbg "Starting remote updating..."
for remote in $UPSTREAM_REMOTE
do
dbg "Updating remote '$remote'"
__git "$NIXPKGS" fetch "$remote"
dbg "Ready updating remote '$remote'"
done
dbg "... ready remote updating"
else
dbg "Not updating remote upstream here."
fi
continue_question "Trying to create tag '$TAG_NAME' at '$NIXPKGS' on commit '$commit'" && \
(__git "$NIXPKGS" tag $TAG_FLAGS_NIXPKGS "$TAG_NAME" $commit || \
stderr "Could not create tag in nixpkgs clone")
else
stderr "Do not generate a tag in the nixpkgs clone"
stderr "no NIXPKGS given."
usage
stderr "Continuing..."
fi
else
stdout "nixpkgs tag generating disabled"
fi
stdout "Ready."
|