bash: Add shorthands to mount client-side encrypted NAS directories

This is useful when synchronizing to an Rclone encrypted remote

bash/.bashrc

@@ -124,3 +124,44 @@ export QT_IM_MODULE=fcitx
 export SDL_IM_MODULE=fcitx
 export WLR_XWAYLAND=$HOME/.local/bin/Xwayland-noshm
 $MACHINE_START_SWAY && [[ -z "$DISPLAY" && $(tty) == /dev/tty1 ]] && exec sway
+
+# Miscellaneous utilities
+function clamp_filename() {
+  [[ -z "$1" ]] && return 1
+
+  local len="$1"
+
+  for file in *; do
+    local filename_len=$(echo "$file" | wc -c)
+
+    if [ $filename_len -gt $len ]; then
+      local extension="${file##*.}"
+      local filename="${filename%.*}"
+      if [ ${#extension} -gt 5 ]; then
+        filename="$file"
+        extension=""
+      fi
+      local clamped_filename="$(echo "$file" | cut -c1-$((len - ${#extension})) | iconv -f utf8 -t utf8 -c -)"
+      if [ ${#extension} -gt 0 ]; then
+        clamped_filename="$clamped_filename.$extension"
+      fi
+      echo "File '$PWD/$file' clamped to '$PWD/$clamped_filename'"
+      mv "$file" "$clamped_filename"
+      file="$clamped_filename"
+    fi
+
+    if [ -d "$file" ]; then
+      pushd "$file" > /dev/null
+      clamp_filename "$1"
+      popd > /dev/null
+    fi
+  done
+}
+
+function open_nas_decrypt() {
+  gocryptfs -passfile /dev/stdin "$MACHINE_NAS_CIPHER_PATH" "$MACHINE_NAS_DECRYPT_PATH" <<< "$(pass gocrypt show "$MACHINE_NAS_CIPHER_PASS")"
+}
+
+function close_nas_decrypt() {
+  fusermount -u "$MACHINE_NAS_DECRYPT_PATH"
+}

restic-backup/.local/bin/restic-backup

@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+
+set -e
+
+source ~/.config/restic-backup/config.sh
+
+cleanup() {
+  pass gocrypt close || true > /dev/null 2>&1
+}
+
+trap cleanup EXIT
+
+pass gocrypt close > /dev/null 2>&1 || true
+PASS_GOCRYPT_CLOSE_TIMEOUT=2147483648 pass gocrypt open
+
+for dir in ${RESTIC_BACKUP_SUBVOL_PATHS[@]}; do 
+  parent="$(dirname $dir)"
+  snap="$parent/$(basename $dir)-restic"
+  echo "snap = $snap"
+  sudo btrfs subvol delete "$snap" > /dev/null 2>&1 || true
+  sudo btrfs subvol snap "$dir" "$snap"
+  restic-wrapper --verbose backup "$snap"
+  sudo btrfs subvol delete "$snap" || true
+done

restic-backup/.local/bin/restic-wrapper

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+
+set -e
+
+source ~/.config/restic-backup/config.sh
+pass gocrypt open || true
+sudo restic --password-file /dev/stdin -r "$RESTIC_BACKUP_REPO" $@ <<< $(pass show "$RESTIC_BACKUP_PASS")