prune: save password in an SSH agent, and compact after pruning

Since we want to run two commands, use a temporary SSH agent
to hold the key, so that the user only has to enter the password
once.

initial-setup.sh

@@ -89,8 +89,10 @@ export BORG_BASE_DIR=${BORG_DIR}
 export BORG_CACHE_DIR=${BORG_DIR}/cache
 export BORG_CONFIG_DIR=${BORG_DIR}/config
 if [ "\$1" = "--rw" ] ; then
-    echo "=== Need SSH key passphrase.  Check Bitwarden for:"
-    echo "===   borg $(hostname) / read-write SSH key"
+    if [ "$BORG_RW_KEY_ADDED" != "1" ] ; then
+        echo "=== Need SSH key passphrase.  Check Bitwarden for:"
+        echo "===   borg $(hostname) / read-write SSH key"
+    fi
     export BORG_RSH="ssh -F $SSH/config -o BatchMode=no -i $SSH/id_ecdsa"
     shift
 else

prune.sh

@@ -3,10 +3,24 @@
 BORG="$(dirname "$0")/borg.sh --rw"
 set -e
 
+if [ "$BORG_RW_KEY_ADDED" != "1" ] ; then
+    echo "Re-executing under a new ssh agent"
+    exec env BORG_RW_KEY_ADDED=1 ssh-agent "$0"
+fi
+
+echo "=== Please enter SSH key passphrase.  Check Bitwarden for:"
+echo "===   borg basis / read-write SSH key"
+ssh-add -v "$(realpath "$(dirname "$0")")/ssh/id_ecdsa"
+
 $BORG prune \
         --verbose \
+        --progress \
         --stats \
         --keep-within=7d \
         --keep-daily=14 \
         --keep-weekly=8 \
         --keep-monthly=-1
+
+$BORG compact \
+        --verbose \
+        --progress