Merge pull request #77 from matthiasbeyer/channel-update

Channel update tool

2 files changed, 76 insertions, 0 deletions

diff --git a/nix-script-channel-update.sh b/nix-script-channel-update.sh
new file mode 100755
index 0000000..505e4b0
--- /dev/null
+++ b/nix-script-channel-update.sh
@@ -0,0 +1,69 @@
+#!/usr/bin/env bash
+
+source $(dirname ${BASH_SOURCE[0]})/nix-utils.sh
+
+usage() {
+    cat <<EOS
+    $(help_synopsis "channel" "update [-h] [-t <name>] [-w <cfgdir>] [-n]")
+
+        -t <name>   | Name for the new tag, instead of nixos-<host>-channel-<num>
+        -w <cfgdir> | Alternative config dir, default: $RC_CONFIG
+        -n          | DON'T include hostname in tag name
+        -h          | Show this help and exit
+
+$(help_end)
+EOS
+}
+
+TAG_NAME=""
+CONFIG=$RC_CONFIG
+HOST="$(hostname)"
+
+while getopts "t:w:nh" OPTION
+do
+    case $OPTION in
+        t)
+            TAG_NAME=$OPTARG
+            dbg "TAG_NAME = $TAG_NAME"
+            ;;
+
+        w)
+            CONFIG=$OPTARG
+            dbg "CONFIG = $CONFIG"
+            ;;
+
+        n)
+            HOST=""
+            dbg "HOST = $HOST"
+            ;;
+
+        h)
+            usage
+            exit 0
+            ;;
+
+        *)
+            ;;
+    esac
+done
+
+[[ -z "$CONFIG" ]] && \
+    stderr "No configuration git directory." && \
+    stderr "Won't do anything" && exit 1
+
+stdout "Updating nix-channel"
+explain sudo nix-channel --update
+stdout "Ready with updating"
+
+if [[ -z "$NAME" ]]
+then
+    TAG_NAME="nixos-$([[ ! -z "$HOST" ]] && echo "$HOST-")channel-$(current_channel_generation)"
+    stdout "Tag name: '$TAG_NAME'"
+fi
+
+stdout "Resetting sudo password"
+sudo -k
+
+stdout "Tagging '$CONFIG' repo with tag name '$TAG_NAME'"
+__git "$CONFIG" tag $TAG_NAME
+
diff --git a/nix-utils.sh b/nix-utils.sh
index 382763f..4028004 100644
--- a/nix-utils.sh
+++ b/nix-utils.sh
@@ -95,6 +95,13 @@ current_user_generation() {
 }
 
 #
+# get the current channel generation
+#
+current_channel_generation() {
+    grep_generation "sudo nix-env -p /nix/var/nix/profiles/per-user/root/channels --list-generations"
+}
+
+#
 # Ask the user whether to continue or not
 #
 continue_question() {