Extend gd functionality

zsh/aliases.zsh

@@ -24,3 +24,117 @@ _take() {
     cd $1
 }
 
+# gd: Check dependencies and auth
+_gdcheck() {
+  # deps
+  local missing=()
+  for cmd in rclone zstd gpg; do
+    command -v "$cmd" >/dev/null 2>&1 || missing+=("$cmd")
+  done
+  (( ${#missing[@]} == 0 )) || {
+    print -u2 "Missing dependencies: ${missing[*]}"
+    return 1
+  }
+
+  # auth
+  rclone lsd gdrive: >/dev/null 2>&1 || {
+    print -u2 "Google Drive auth failed; try: rclone config reconnect gdrive:"
+    return 1
+  }
+}
+
+gd-auth() {
+  rclone lsd gdrive: >/dev/null 2>&1 || {
+    print -u2 "Google Drive auth failed; try: rclone config reconnect gdrive:"
+    return 1
+  }
+}
+
+gd-check() {
+  local missing=()
+
+  for cmd in rclone zstd gpg; do
+    command -v "$cmd" >/dev/null 2>&1 || missing+=("$cmd")
+  done
+
+  (( ${#missing[@]} == 0 )) || {
+    print -u2 "Missing dependencies: ${missing[*]}"
+    return 1
+  }
+
+  gd-auth
+}
+
+# gd-push pushes a file to Google Drive with compression and password encryption
+gd-push() {
+  gd-check || return
+  zstd -6 -T0 -c -- "$1" \
+    | gpg -c -z 0 -o - \
+    | rclone rcat "gdrive:backups/${1:t}.zst.gpg"
+}
+
+# gd-push pulls a file from Google Drive, password decrypts and decompresses it.
+# gd-push outputs to stdout
+gd-pull() {
+  gd-check || return
+  rclone cat "gdrive:backups/${1:t}.zst.gpg" \
+    | gpg -d \
+    | zstd -d -c
+}
+
+# gd-ls lists all the files available on Google Drive
+gd-ls() {
+  gd-check || return
+  rclone lsf --files-only gdrive:backups/ \
+    | sed -n 's/\.zst\.gpg$//p'
+}
+
+# gd-rm removes a file from Google Drive
+gd-rm() {
+  gd-check || return
+  rclone deletefile "gdrive:backups/${1:t}.zst.gpg"
+}
+
+# dispatcher for gd functions
+gd() {
+  local command="$1"
+  shift 2>/dev/null || true
+
+  case "$command" in
+    push)
+      gd-push "$@"
+      ;;
+    pull)
+      gd-pull "$@"
+      ;;
+    ls)
+      gd-ls "$@"
+      ;;
+    rm)
+      gd-rm "$@"
+      ;;
+    check)
+      gd-check "$@"
+      ;;
+    auth)
+      gd-auth "$@"
+      ;;
+    "")
+      print -u2 "usage: gd <command> [args]"
+      print -u2 ""
+      print -u2 "commands:"
+      print -u2 "  push <path>   Compress, encrypt, and upload a file"
+      print -u2 "  pull <path>   Download, decrypt, and decompress to stdout"
+      print -u2 "  ls            List available files"
+      print -u2 "  rm <path>     Remove a file from Google Drive"
+      print -u2 "  check         Check dependencies and authentication"
+      print -u2 "  auth          Check Google Drive authentication"
+      return 2
+      ;;
+    *)
+      print -u2 "gd: unknown command: $command"
+      print -u2 "usage: gd {push|pull|ls|rm|check|auth} ..."
+      return 2
+      ;;
+  esac
+}