#!/bin/sh
set -e

if [ -z "$INPUT_HOST" ]; then
  echo "Error: host is required"
  exit 1
fi

if [ -z "$INPUT_USERNAME" ]; then
  echo "Error: username is required"
  exit 1
fi

if [ -z "$INPUT_KEY" ]; then
  echo "Error: key is required"
  exit 1
fi

if [ -z "$INPUT_TARGET" ]; then
  echo "Error: target is required"
  exit 1
fi

SSH_PORT="${INPUT_PORT:-22}"
SOURCE="${INPUT_SOURCE:-.}"

# ssh expands ~ from the passwd database rather than $HOME, so the two disagree
# whenever a container sets HOME elsewhere. Pass absolute paths instead.
SSH_DIR="$HOME/.ssh"
KEY_FILE="$SSH_DIR/deploy_key"
KNOWN_HOSTS="$SSH_DIR/known_hosts"

mkdir -p "$SSH_DIR"
chmod 700 "$SSH_DIR"

trap 'rm -f "$KEY_FILE"' EXIT

echo "$INPUT_KEY" > "$KEY_FILE"
chmod 600 "$KEY_FILE"

ssh-keyscan -p "$SSH_PORT" -H "$INPUT_HOST" >> "$KNOWN_HOSTS" 2>/dev/null

rsync -avz \
  -e "ssh -i $KEY_FILE -o UserKnownHostsFile=$KNOWN_HOSTS -p $SSH_PORT -o ConnectTimeout=30" \
  $INPUT_ARGS \
  "${SOURCE}/" \
  "${INPUT_USERNAME}@${INPUT_HOST}:${INPUT_TARGET}/"

echo "Deployed ${SOURCE} to ${INPUT_HOST}:${INPUT_TARGET}"