stash-cli 0.8.1

#!/usr/bin/env bash
set -euo pipefail

usage() {
  cat <<'EOF'
Usage:
  rstash user@host [stash-push-args...] [file]

Stores stdin or a local file into a remote stash over SSH using `stash push`.

Behavior:
  - the first argument is the SSH target
  - forwards all arguments to remote `stash push`
  - if the last argument is an existing local file, it is streamed over stdin
  - when a local file is used, `filename=<basename>` is added automatically
    unless you already passed a filename attribute explicitly

Examples:
  rstash user@host README.md
  printf 'hello\n' | rstash user@host --attr source=local
  rstash user@host --print=stdout --attr label=docs README.md
EOF
}

if [[ "${1:-}" == "-h" || "${1:-}" == "--help" ]]; then
  usage
  exit 0
fi

if ! command -v ssh >/dev/null 2>&1; then
  echo "error: ssh is required" >&2
  exit 1
fi

if [[ $# -lt 1 ]]; then
  usage >&2
  exit 1
fi

remote="$1"
shift

if [[ -z "$remote" ]]; then
  echo "error: remote host is required" >&2
  exit 1
fi

args=("$@")
file_path=""
if (( ${#args[@]} > 0 )); then
  last_index=$((${#args[@]} - 1))
  last_arg="${args[$last_index]}"
  if [[ "$last_arg" != -* && -f "$last_arg" ]]; then
    file_path="$last_arg"
    unset 'args[$last_index]'
    args=("${args[@]}")
  fi
fi

filename_attr_set=0
for (( i = 0; i < ${#args[@]}; i++ )); do
  case "${args[$i]}" in
    --attr=filename=*)
      filename_attr_set=1
      ;;
    -a|--attr)
      if (( i + 1 < ${#args[@]} )) && [[ "${args[$((i + 1))]}" == filename=* ]]; then
        filename_attr_set=1
      fi
      ;;
  esac
done

if [[ -n "$file_path" && $filename_attr_set -eq 0 ]]; then
  args+=(--attr "filename=$(basename "$file_path")")
fi

quote_arg() {
  printf '%q' "$1"
}

remote_cmd="stash push"
for arg in "${args[@]}"; do
  remote_cmd+=" $(quote_arg "$arg")"
done

if [[ -n "$file_path" ]]; then
  ssh "$remote" "$remote_cmd" < "$file_path"
else
  ssh "$remote" "$remote_cmd"
fi