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#!/usr/bin/env bash
source $(dirname ${BASH_SOURCE[0]})/nix-utils.sh
usage() {
cat <<EOS
$(help_synopsis "${BASH_SOURCE[0]}" "[-s | -u | -p <profile>] [-h]")
-s | Show system generation
-u | Show user generation (default)
-p <profile> | Show <profile> generation
-h | Show this help and exit
Show the number of the current generations. Defaults to user
profile, but system profile can be checked as well.
Example usage:
# To show the system generation which is current.
# With verbosity on.
nix-script -v show-generations -s
$(help_end "${BASH_SOURCE[0]}")
EOS
}
SYSTEM=0
USER=1
PROFILE=""
while getopts "sup:h" OPTION
do
case $OPTION in
s)
SYSTEM=1
USER=0
stdout "Showing system generation"
;;
u)
SYSTEM=0
USER=1
stdout "Showing user generation"
;;
p)
SYSTEM=0
USER=0
PROFILE=$OPTARG
dbg "PROFILE = $PROFILE"
;;
h)
stdout "Showing usage"
usage
exit 0
;;
esac
done
if [[ ! -z "$PROFILE" ]]
then
grep_generation "sudo nix-env -p /nix/var/nix/profiles/$PROFILE --list-generations"
else
([[ $SYSTEM -eq 1 ]] && current_system_generation) || \
current_user_generation
fi
stdout "Ready"
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