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added null check to hm-cli

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William 2025-10-15 20:02:47 -03:00
parent 5edad8b957
commit 4b5426885c
1 changed files with 9 additions and 5 deletions
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14
packages/hm-cli.nix
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@ -23,9 +23,9 @@ pkgs.writeShellScriptBin "hm" ''
Environment Variables: Environment Variables:
HM_PATH Override default flake path (~/.config/home-manager) HM_PATH Override default flake path (~/.config/home-manager)
Currently set to "$(echo $HM_PATH)" Currently set to "''${HM_PATH:-<not set>}"
HM_USER Override default user output ("$(whoami)@$(hostname)") HM_USER Override default user output ("$(whoami)@$(hostname)")
Currently set to "$(echo $HM_USER)" Currently set to "''${HM_USER:-<not set>}"
EOF EOF
} }
@ -58,10 +58,14 @@ pkgs.writeShellScriptBin "hm" ''
"$HM" remove-generations "$@" "$HM" remove-generations "$@"
;; ;;
rollback) rollback)
"$HM" generations | \ PREV_GEN=$("$HM" generations | \
sed -n 's/^[[:space:]]*id \([0-9]\+\).*/\1/p' | \ sed -n 's/^[[:space:]]*id \([0-9]\+\).*/\1/p' | \
head -n 2 | tail -n 1 | \ head -n 2 | tail -n 1)
xargs -I {} "$HM" switch --flake "$FLAKE_PATH" --switch-generation {} if [[ -z "$PREV_GEN" ]]; then
echo "Error: could not determine previous generation (possibly only one generation exists)"
exit 1
fi
"$HM" switch --flake "$FLAKE_PATH" --switch-generation "$PREV_GEN"
;; ;;
switch) switch)
if [[ $# -ne 3 ]]; then if [[ $# -ne 3 ]]; then