<%
  prepare = commands(:default).map { |s| "(\n\n#{indent 2, s}\n\n)" }.join(" && ")
  launch  = commands(:launch).map  { |s| "(\n\n#{indent 2, s}\n\n)" }.join(" && ")
  clean   = commands(:clean).map   { |s| "(\n\n#{indent 2, s}\n\n)" }.join(" && ")
%>
#!/usr/bin/env bash

# Go to the deploy path
cd "<%= deploy_to %>" || (
  echo "! ERROR: not set up."
  echo "The path '<%= deploy_to %>' is not accessible on the server."
  echo "You may need to run 'mina setup' first."
  false
) || exit 15

# Check releases path
if [ ! -d "<%= releases_path %>" ]; then
  echo "! ERROR: not set up."
  echo "The directory '<%= releases_path %>' does not exist on the server."
  echo "You may need to run 'mina setup' first."
  exit 16
fi

# Check lockfile
if [ -e "<%= lock_file %>" ]; then
  echo "! ERROR: another deployment is ongoing."
  echo "The file '<%= lock_file %>' was found."
  echo "If no other deployment is ongoing, delete the file to continue."
  exit 17
fi

# Determine $previous_path and other variables
[ -h "<%= current_path %>" ] && [ -d "<%= current_path %>" ] && previous_path=$(cd "<%= current_path %>" >/dev/null && pwd -LP)
build_path="./tmp/build-`date +%s`$RANDOM"
version=$((`cat "<%= deploy_to %>/last_version" 2>/dev/null`+1))
release_path="<%= releases_path %>/$version"

# Sanity check
if [ -e "$build_path" ]; then
  echo "! ERROR: Path already exists."
  exit 18
fi

# Bootstrap script (in deployer)
(
  echo "-----> Creating a temporary build path"
  <%= echo_cmd %[touch "#{lock_file}"] %> &&
  <%= echo_cmd %[mkdir -p "$build_path"] %> &&
  <%= echo_cmd %[cd "$build_path"] %> &&
  (
<%= indent 4, (prepare.empty? ? "true" : prepare) %>
  )
) &&

#
# Rename to the real release path, then symlink 'current'
(
  echo "-----> Build finished"
  echo "-----> Moving build to $release_path"
  <%= echo_cmd %[mv "$build_path" "$release_path"] %> &&

  echo "-----> Updating the <%= current_path %> symlink" &&
  <%= echo_cmd %[ln -nfs "$release_path" "#{current_path}"] %>
) &&

# ============================
# === Start up serve => (in deployer)
(
  echo "-----> Launching"
  <%= echo_cmd %[cd "$release_path"] %>
<%= indent 2, (launch.empty? ? "true" : launch) %>
) &&

# ============================
# === Complete & unlock
(
  rm -f "<%= lock_file %>"
  echo "$version" > "./last_version"
  echo "-----> Done. Deployed v$version"
) ||

# ============================
# === Failed deployment
(
  echo "! ERROR: Deploy failed."

<%= indent 2, clean %>

  echo "-----> Cleaning up build"
  [ -e "$build_path" ] && (
    <%= echo_cmd %[rm -rf "$build_path"] %>
  )
  [ -e "$release_path" ] && (
    echo "Deleting release"
    <%= echo_cmd %[rm -rf "$release_path"] %>
  )
  (
    echo "Unlinking current"
    [ -n "$previous_path" ] && <%= echo_cmd %[ln -nfs "$previous_path" "#{current_path}"] %>
  )

  # Unlock
  <%= echo_cmd %[rm -f "#{lock_file}"] %>
  echo "OK"
  exit 19
)