entrypoint.sh

#!/usr/bin/env bash

set -o errexit
set -o nounset
set -o pipefail

export GITHUB="true"

GITHUB_ACTION_PATH="${GITHUB_ACTION_PATH%/}"
DRONE_SSH_RELEASE_URL="${DRONE_SSH_RELEASE_URL:-https://github.com/appleboy/drone-ssh/releases/download}"
DRONE_SSH_VERSION="${DRONE_SSH_VERSION:-1.8.0}"

function detect_client_info() {
  if [ -n "${SSH_CLIENT_OS-}" ]; then
    CLIENT_PLATFORM="${SSH_CLIENT_OS}"
  else
    local kernel
    kernel="$(uname -s)"
    case "${kernel}" in
    Darwin)
      CLIENT_PLATFORM="darwin"
      ;;
    Linux)
      CLIENT_PLATFORM="linux"
      ;;
    Windows)
      CLIENT_PLATFORM="windows"
      ;;
    *)
      echo "Unknown, unsupported platform: ${kernel}." >&2
      echo "Supported platforms: Linux, Darwin and Windows." >&2
      echo "Bailing out." >&2
      exit 2
      ;;
    esac
  fi

  if [ -n "${SSH_CLIENT_ARCH-}" ]; then
    CLIENT_ARCH="${SSH_CLIENT_ARCH}"
  else
    local machine
    machine="$(uname -m)"
    case "${machine}" in
    x86_64* | i?86_64* | amd64*)
      CLIENT_ARCH="amd64"
      ;;
    aarch64* | arm64*)
      CLIENT_ARCH="arm64"
      ;;
    *)
      echo "Unknown, unsupported architecture (${machine})." >&2
      echo "Supported architectures x86_64, i686, arm64." >&2
      echo "Bailing out." >&2
      exit 3
      ;;
    esac
  fi
}

detect_client_info
DOWNLOAD_URL_PREFIX="${DRONE_SSH_RELEASE_URL}/v${DRONE_SSH_VERSION}"
CLIENT_BINARY="drone-ssh-${DRONE_SSH_VERSION}-${CLIENT_PLATFORM}-${CLIENT_ARCH}"
TARGET="${GITHUB_ACTION_PATH}/${CLIENT_BINARY}"
echo "Will download ${CLIENT_BINARY} from ${DOWNLOAD_URL_PREFIX}"
curl -fsSL --retry 5 --keepalive-time 2 "${DOWNLOAD_URL_PREFIX}/${CLIENT_BINARY}" -o ${TARGET}
chmod +x ${TARGET}

echo "======= CLI Version ======="
sh -c "${TARGET} --version" # print version
echo "==========================="
if [[ "$INPUT_CAPTURE_STDOUT" == 'true' ]]; then
  echo 'stdout<<EOF' >> $GITHUB_OUTPUT # use heredoc for multiline output
  sh -c "${TARGET} $*" | tee -a $GITHUB_OUTPUT # run the command
  echo 'EOF' >> $GITHUB_OUTPUT
else
  sh -c "${TARGET} $*" # run the command
fi