Add clean-hm script

README.md

@@ -48,12 +48,13 @@ nix develop -c /etc/nixos/git/docs/setup.sh
 
 ---
 # To Do List
-* [ ] Steam Deck config 
+* [x] Steam Deck config 
-    * [ ] Jellyfin
+    * [x] Jellyfin
 * [x] Complete bakersfield-rpi4 image
 * [x] Secrets / Tailscale keys for:
     * [x] bakersfield-rpi4 
     * [x] steamdeck
+* [ ] Fix sysctl backup script
 * [ ] 24.05 Updates:
     * [ ] Re-enable a few things <SPC-S> "TODO"
     * [ ] Add sound to XRDP config 

nixos/common/software/cli/clean-hm.nix

@@ -0,0 +1,8 @@
+let
+  clean-hm    = pkgs.writeScriptBin "clean-hm"   "${builtins.readFile ./scripts/clean-hm.sh}";
+in {
+  environment.systemPackages = [ 
+    clean-hm
+  ];  
+}
+

nixos/common/software/cli/scripts/clean-hm.sh

@@ -0,0 +1,244 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+## Defaults
+keepGensDef=30; keepDaysDef=30
+keepGens=$keepGensDef; keepDays=$keepDaysDef
+
+## Usage
+usage () {
+    printf "Usage:\n\t ./trim-generations.sh <keep-gernerations> <keep-days> <profile> \n\n
+(defaults are: Keep-Gens=$keepGensDef Keep-Days=$keepDaysDef Profile=user)\n\n"
+    printf "If you enter any parameters, you must enter all three, or none to use defaults.\n"
+    printf "Example:\n\t trim-generations.sh 15 10 home-manager\n"
+    printf "  this will work on the home-manager profile and keep all generations from the\n"
+    printf "last 10 days, and keep at least 15 generations no matter how old.\n"
+    printf "\nProfiles available are:\tuser, home-manager, channels, system (root)\n"
+    printf "\n-h or --help prints this help text."
+}
+
+if [ $# -eq 1 ]; then      # if help requested
+    if [ $1 = "-h" ]; then
+         usage
+         exit 1;
+    fi
+    if [ $1 = "--help" ]; then
+         usage
+         exit 2;
+    fi
+    printf "Dont recognise your option exiting..\n\n"
+    usage
+    exit 3;
+
+    elif [ $# -eq 0 ]; then            # print the defaults
+        printf "The current defaults are:\n Keep-Gens=$keepGensDef Keep-Days=$keepDaysDef \n\n"
+        read -p "Keep these defaults? (y/n):" answer
+
+        case "$answer" in
+        [yY1] )
+                printf "Using defaults..\n"
+            ;;
+        [nN0] ) printf "ok, doing nothing, exiting..\n"
+            exit 6;
+            ;;
+        *     ) printf "%b" "Doing nothing, exiting.."
+            exit 7;
+            ;;
+        esac
+fi
+
+## Handle parameters (and change if root)
+if [[ $EUID -ne 0 ]]; then              # if not root
+    profile=$(readlink /home/$USER/.nix-profile)
+else
+    if [ -d /nix/var/nix/profiles/system ]; then   # maybe this or the other
+        profile="/nix/var/nix/profiles/system"
+    elif [ -d /nix/var/nix/profiles/default ]; then
+        profile="/nix/var/nix/profiles/default"
+    else
+        echo "Cant find profile for root. Exiting"
+        exit 8
+    fi
+fi
+if (( $# < 1 )); then
+    printf "Keeping default: $keepGensDef generations OR $keepDaysDef days, whichever is more\n"
+elif [[ $# -le 2 ]]; then
+    printf "\nError: Not enough arguments.\n\n" >&2
+    usage
+    exit 1
+elif (( $# > 4)); then
+    printf "\nError: Too many arguments.\n\n" >&2
+    usage
+    exit 2
+else
+    if [ $1 -lt 1 ]; then
+        printf "using Gen numbers less than 1 not recommended. Setting to min=1\n"
+        read -p "is that ok? (y/n): " asnwer
+        #printf "$asnwer"
+        case "$asnwer" in
+        [yY1] )
+            printf "ok, continuing..\n"
+            ;;
+        [nN0] )
+            printf "ok, doing nothing, exiting..\n"
+            exit 6;
+            ;;
+        *     )
+            printf "%b" "Doing nothing, exiting.."
+            exit 7;
+            ;;
+        esac
+    fi
+    if [ $2 -lt 0 ]; then
+        printf "using negative days number not recommended. Setting to min=0\n"
+        read -p "is that ok? (y/n): " asnwer
+
+        case "$asnwer" in
+        [yY1] )
+            printf "ok, continuing..\n"
+            ;;
+        [nN0] )
+            printf "ok, doing nothing, exiting..\n"
+            exit 6;
+            ;;
+        *     )
+            printf "%b" "Doing nothing, exiting.."
+            exit 7;
+            ;;
+        esac
+    fi
+    keepGens=$1; keepDays=$2;
+    (( keepGens < 1 )) && keepGens=1
+    (( keepDays < 0 )) && keepDays=0
+    if [[ $EUID -ne 0 ]]; then
+        if [[ $3 == "user" ]] || [[ $3 == "default" ]]; then
+            profile=$(readlink /home/$USER/.nix-profile)
+        elif [[ $3 == "home-manager" ]]; then
+            # home-manager defaults to $XDG_STATE_HOME; otherwise, use
+            # `home-manager generations` and `nix-store --query --roots
+            # /nix/store/...` to figure out what reference is keeping the old
+            # generations alive.
+            profile="${XDG_STATE_HOME:-$HOME/.local/state}/nix/profiles/home-manager"
+        elif [[ $3 == "channels" ]]; then
+            profile="/nix/var/nix/profiles/per-user/$USER/channels"
+        else
+            printf "\nError: Do not understand your third argument. Should be one of: (user / home-manager/ channels)\n\n"
+            usage
+            exit 3
+        fi
+    else
+        if [[ $3 == "system" ]]; then
+            profile="/nix/var/nix/profiles/system"
+        elif [[ $3 == "user" ]] || [[ $3 == "default" ]]; then
+            profile="/nix/var/nix/profiles/default"
+        else
+            printf "\nError: Do not understand your third argument. Should be one of: (user / system)\n\n"
+            usage
+            exit 3
+        fi
+    fi
+    printf "OK! \t Keep Gens = $keepGens \t Keep Days = $keepDays\n\n"
+fi
+
+printf "Operating on profile: \t $profile\n\n"
+
+## Runs at the end, to decide whether to delete profiles that match chosen parameters.
+choose () {
+    local default="$1"
+    local prompt="$2"
+    local answer
+
+    read -p "$prompt" answer
+    [ -z "$answer" ] && answer="$default"
+
+    case "$answer" in
+        [yY1] ) #printf "answered yes!\n"
+             nix-env --delete-generations -p $profile ${!gens[@]}
+            exit 0
+            ;;
+        [nN0] ) printf "Ok doing nothing exiting..\n"
+            exit 6;
+            ;;
+        *     ) printf "%b" "Unexpected answer '$answer'!" >&2
+            exit 7;
+            ;;
+    esac
+} # end of function choose
+
+# printf "profile = $profile\n\n"
+## Query nix-env for generations list
+IFS=$'\n' nixGens=( $(nix-env --list-generations -p $profile | sed 's:^\s*::; s:\s*$::' | tr '\t' ' ' | tr -s ' ') )
+timeNow=$(date +%s)
+
+## Get info on oldest generation
+IFS=' ' read -r -a oldestGenArr <<< "${nixGens[0]}"
+oldestGen=${oldestGenArr[0]}
+oldestDate=${oldestGenArr[1]}
+printf "%-30s %s\n" "oldest generation:" $oldestGen
+#oldestDate=${nixGens[0]:3:19}
+printf "%-30s %s\n" "oldest generation created:" $oldestDate
+oldestTime=$(date -d "$oldestDate" +%s)
+oldestElapsedSecs=$((timeNow-oldestTime))
+oldestElapsedMins=$((oldestElapsedSecs/60))
+oldestElapsedHours=$((oldestElapsedMins/60))
+oldestElapsedDays=$((oldestElapsedHours/24))
+printf "%-30s %s\n" "minutes before now:" $oldestElapsedMins
+printf "%-30s %s\n" "hours before now:" $oldestElapsedHours
+printf "%-30s %s\n\n" "days before now:" $oldestElapsedDays
+
+## Get info on current generation
+for i in "${nixGens[@]}"; do
+    IFS=' ' read -r -a iGenArr <<< "$i"
+    genNumber=${iGenArr[0]}
+    genDate=${iGenArr[1]}
+    if [[ "$i" =~ current ]]; then
+        currentGen=$genNumber
+        printf "%-30s %s\n" "current generation:" $currentGen
+        currentDate=$genDate
+        printf "%-30s %s\n" "current generation created:" $currentDate
+        currentTime=$(date -d "$currentDate" +%s)
+        currentElapsedSecs=$((timeNow-currentTime))
+        currentElapsedMins=$((currentElapsedSecs/60))
+        currentElapsedHours=$((currentElapsedMins/60))
+        currentElapsedDays=$((currentElapsedHours/24))
+        printf "%-30s %s\n" "minutes before now:" $currentElapsedMins
+        printf "%-30s %s\n" "hours before now:" $currentElapsedHours
+        printf "%-30s %s\n\n" "days before now:" $currentElapsedDays
+    fi
+done
+
+## Compare oldest and current generations
+timeBetweenOldestAndCurrent=$((currentTime-oldestTime))
+elapsedDays=$((timeBetweenOldestAndCurrent/60/60/24))
+generationsDiff=$((currentGen-oldestGen))
+
+## Figure out what we should do, based on generations and options
+if [[ elapsedDays -le keepDays ]]; then
+    printf "All generations are no more than $keepDays days older than current generation. \nOldest gen days difference from current gen: $elapsedDays \n\n\tNothing to do!\n"
+    exit 4;
+elif [[ generationsDiff -lt keepGens ]]; then
+    printf "Oldest generation ($oldestGen) is only $generationsDiff generations behind current ($currentGen). \n\n\t Nothing to do!\n"
+    exit 5;
+else
+    printf "\tSomething to do...\n"
+    declare -a gens
+    for i in "${nixGens[@]}"; do
+        IFS=' ' read -r -a iGenArr <<< "$i"
+        genNumber=${iGenArr[0]}
+        genDiff=$((currentGen-genNumber))
+        genDate=${iGenArr[1]}
+        genTime=$(date -d "$genDate" +%s)
+        elapsedSecs=$((timeNow-genTime))
+        genDaysOld=$((elapsedSecs/60/60/24))
+        if [[ genDaysOld -gt keepDays ]] && [[ genDiff -ge keepGens ]]; then
+            gens["$genNumber"]="$genDate, $genDaysOld day(s) old"
+        fi
+    done
+    printf "\nFound the following generation(s) to delete:\n"
+    for K in "${!gens[@]}"; do
+        printf "generation $K \t ${gens[$K]}\n"
+    done
+    printf "\n"
+    choose "y" "Do you want to delete these? [Y/n]: "
+fi
+

nixos/hosts/backups-rpi4/backup-script.nix

@@ -16,3 +16,4 @@ in {
     sopsFile = ../../../secrets/hosts/backups-rpi4.yaml;
   };
 }
+