deploy.sh.erb

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

# Go to the deploy path
cd "<%= fetch(:deploy_to) %>" || (
  echo "! ERROR: not set up."
  echo "The path '<%= fetch(: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 "<%= fetch(:releases_path) %>" ]; then
  echo "! ERROR: not set up."
  echo "The directory '<%= fetch(:releases_path) %>' does not exist on the server."
  echo "You may need to run 'mina setup' first."
  exit 16
fi

# Check lockfile
if [ -e "<%= fetch(:lock_file) %>" ]; then
  echo "! ERROR: another deployment is ongoing."
  echo "The file '<%= fetch(:lock_file) %>' was found. File was last modified at $(stat -c %y <%= fetch(:lock_file) %>)"
  echo "If no other deployment is ongoing, run 'mina deploy:force_unlock' to delete the file."
  exit 17
fi

# Determine $previous_path and other variables
[ -h "<%= fetch(:current_path) %>" ] && [ -d "<%= fetch(:current_path) %>" ] && previous_path=$(cd "<%= fetch(:current_path) %>" >/dev/null && pwd -LP)
build_path="./tmp/build-$(date +%s)$RANDOM"

version="<%= next_version %>"
release_path="<%= fetch(: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 "#{fetch(:lock_file)}"] %> &&
  <%= echo_cmd %[mkdir -p "$build_path"] %> &&
  <%= echo_cmd %[cd "$build_path"] %> &&
  (
<%= indent 2, (default.empty? ? "true" : default) %>
  ) &&
  echo "-----> Deploy finished"
) &&

#
# Build
(
  echo "-----> Building"
  echo "-----> Moving build to $release_path"
  <%= echo_cmd %[mv "$build_path" "$release_path"] %> &&
  <%= echo_cmd %[cd "$release_path"] %> &&
  (
<%= indent 2, (build.empty? ? "true" : build) %>
  ) &&
  echo "-----> Build finished"

) &&

#
# Launching
# Rename to the real release path, then symlink 'current'
(
  echo "-----> Launching"
  echo "-----> Updating the <%= fetch(:current_path) %> symlink" &&
  <%= echo_cmd %[ln -nfs "$release_path" "#{fetch(:current_path)}"] %>
) &&

# ============================
# === Start up server => (in deployer)
(
  <%= echo_cmd %[cd "#{fetch(:current_path)}"] %>
<%= indent 2, (launch.empty? ? "true" : launch) %>
) &&

# ============================
# === Complete & unlock
(
  rm -f "<%= fetch(:lock_file) %>"
  echo "-----> Done. Deployed version $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" "#{fetch(:current_path)}"] %>
  )

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