jenkins/rails-package-scripts/postinst.sh

   1 #!/bin/sh
   2 # This code runs after package variable definitions and step2.sh.
   3
   4 set -e
   5
   6 DATABASE_READY=1
   7 APPLICATION_READY=1
   8
   9 if [ -s "$HOME/.rvm/scripts/rvm" ] || [ -s "/usr/local/rvm/scripts/rvm" ]; then
  10     COMMAND_PREFIX="/usr/local/rvm/bin/rvm-exec default"
  11 else
  12     COMMAND_PREFIX=
  13 fi
  14
  15 report_not_ready() {
  16     local ready_flag="$1"; shift
  17     local config_file="$1"; shift
  18     if [ "1" != "$ready_flag" ]; then cat >&2 <<EOF
  19
  20 PLEASE NOTE:
  21
  22 The $PACKAGE_NAME package was not configured completely because
  23 $config_file needs some tweaking.
  24 Please refer to the documentation at
  25 <$DOC_URL> for more details.
  26
  27 When $(basename "$config_file") has been modified,
  28 reconfigure or reinstall this package.
  29
  30 EOF
  31     fi
  32 }
  33
  34 report_web_service_warning() {
  35     local warning="$1"; shift
  36     cat >&2 <<EOF
  37
  38 WARNING: $warning.
  39
  40 To override, set the WEB_SERVICE environment variable to the name of the service
  41 hosting the Rails server.
  42
  43 For Debian-based systems, then reconfigure this package with dpkg-reconfigure.
  44
  45 For RPM-based systems, then reinstall this package.
  46
  47 EOF
  48 }
  49
  50 run_and_report() {
  51     # Usage: run_and_report ACTION_MSG CMD
  52     # This is the usual wrapper that prints ACTION_MSG, runs CMD, then writes
  53     # a message about whether CMD succeeded or failed.  Returns the exit code
  54     # of CMD.
  55     local action_message="$1"; shift
  56     local retcode=0
  57     echo -n "$action_message..."
  58     if "$@"; then
  59         echo " done."
  60     else
  61         retcode=$?
  62         echo " failed."
  63     fi
  64     return $retcode
  65 }
  66
  67 setup_conffile() {
  68     # Usage: setup_conffile CONFFILE_PATH [SOURCE_PATH]
  69     # Both paths are relative to RELEASE_CONFIG_PATH.
  70     # This function will try to safely ensure that a symbolic link for
  71     # the configuration file points from RELEASE_CONFIG_PATH to CONFIG_PATH.
  72     # If SOURCE_PATH is given, this function will try to install that file as
  73     # the configuration file in CONFIG_PATH, and return 1 if the file in
  74     # CONFIG_PATH is unmodified from the source.
  75     local conffile_relpath="$1"; shift
  76     local conffile_source="$1"
  77     local release_conffile="$RELEASE_CONFIG_PATH/$conffile_relpath"
  78     local etc_conffile="$CONFIG_PATH/$(basename "$conffile_relpath")"
  79
  80     # Note that -h can return true and -e will return false simultaneously
  81     # when the target is a dangling symlink.  We're okay with that outcome,
  82     # so check -h first.
  83     if [ ! -h "$release_conffile" ]; then
  84         if [ ! -e "$release_conffile" ]; then
  85             ln -s "$etc_conffile" "$release_conffile"
  86         # If there's a config file in /var/www identical to the one in /etc,
  87         # overwrite it with a symlink.
  88         elif cmp --quiet "$release_conffile" "$etc_conffile"; then
  89             ln --force -s "$etc_conffile" "$release_conffile"
  90         fi
  91     fi
  92
  93     if [ -n "$conffile_source" ]; then
  94         cp --no-clobber "$RELEASE_CONFIG_PATH/$conffile_source" "$etc_conffile"
  95         # Even if $etc_conffile already existed, it might be unmodified from
  96         # the source.  This is especially likely when a user installs, updates
  97         # database.yml, then reconfigures before they update application.yml.
  98         # Use cmp to be sure whether $etc_conffile is modified.
  99         if cmp --quiet "$RELEASE_CONFIG_PATH/$conffile_source" "$etc_conffile"; then
 100             return 1
 101         fi
 102     fi
 103 }
 104
 105 prepare_database() {
 106   DB_MIGRATE_STATUS=`$COMMAND_PREFIX bundle exec rake db:migrate:status 2>&1 || true`
 107   if echo $DB_MIGRATE_STATUS | grep -qF 'Schema migrations table does not exist yet.'; then
 108       # The database exists, but the migrations table doesn't.
 109       run_and_report "Setting up database" $COMMAND_PREFIX bundle exec \
 110                      rake "$RAILSPKG_DATABASE_LOAD_TASK" db:seed
 111   elif echo $DB_MIGRATE_STATUS | grep -q '^database: '; then
 112       run_and_report "Running db:migrate" \
 113                      $COMMAND_PREFIX bundle exec rake db:migrate
 114   elif echo $DB_MIGRATE_STATUS | grep -q 'database .* does not exist'; then
 115       if ! run_and_report "Running db:setup" \
 116            $COMMAND_PREFIX bundle exec rake db:setup 2>/dev/null; then
 117           echo "Warning: unable to set up database." >&2
 118           DATABASE_READY=0
 119       fi
 120   else
 121     echo "Warning: Database is not ready to set up. Skipping database setup." >&2
 122     DATABASE_READY=0
 123   fi
 124 }
 125
 126 configure_version() {
 127   WEB_SERVICE=${WEB_SERVICE:-$(service --status-all 2>/dev/null \
 128       | grep -Eo '\bnginx|httpd[^[:space:]]*' || true)}
 129   if [ -z "$WEB_SERVICE" ]; then
 130     report_web_service_warning "Web service (Nginx or Apache) not found"
 131   elif [ "$WEB_SERVICE" != "$(echo "$WEB_SERVICE" | head -n 1)" ]; then
 132     WEB_SERVICE=$(echo "$WEB_SERVICE" | head -n 1)
 133     report_web_service_warning \
 134         "Multiple web services found.  Choosing the first one ($WEB_SERVICE)"
 135   fi
 136
 137   if [ -e /etc/redhat-release ]; then
 138       # Recognize any service that starts with "nginx"; e.g., nginx16.
 139       if [ "$WEB_SERVICE" != "${WEB_SERVICE#nginx}" ]; then
 140         WWW_OWNER=nginx:nginx
 141       else
 142         WWW_OWNER=apache:apache
 143       fi
 144   else
 145       # Assume we're on a Debian-based system for now.
 146       # Both Apache and Nginx run as www-data by default.
 147       WWW_OWNER=www-data:www-data
 148   fi
 149
 150   echo
 151   echo "Assumption: $WEB_SERVICE is configured to serve Rails from"
 152   echo "            $RELEASE_PATH"
 153   echo "Assumption: $WEB_SERVICE and passenger run as $WWW_OWNER"
 154   echo
 155
 156   echo -n "Creating symlinks to configuration in $CONFIG_PATH ..."
 157   mkdir -p $CONFIG_PATH
 158   setup_conffile environments/production.rb environments/production.rb.example \
 159       || true
 160   setup_conffile application.yml application.yml.example || APPLICATION_READY=0
 161   if [ -n "$RAILSPKG_DATABASE_LOAD_TASK" ]; then
 162       setup_conffile database.yml database.yml.example || DATABASE_READY=0
 163   fi
 164   setup_extra_conffiles
 165   echo "... done."
 166
 167   # Before we do anything else, make sure some directories and files are in place
 168   if [ ! -e $SHARED_PATH/log ]; then mkdir -p $SHARED_PATH/log; fi
 169   if [ ! -e $RELEASE_PATH/tmp ]; then mkdir -p $RELEASE_PATH/tmp; fi
 170   if [ ! -e $RELEASE_PATH/log ]; then ln -s $SHARED_PATH/log $RELEASE_PATH/log; fi
 171   if [ ! -e $SHARED_PATH/log/production.log ]; then touch $SHARED_PATH/log/production.log; fi
 172
 173   cd "$RELEASE_PATH"
 174   export RAILS_ENV=production
 175
 176   if ! $COMMAND_PREFIX bundle --version >/dev/null; then
 177       run_and_report "Installing bundle" $COMMAND_PREFIX gem install bundle
 178   fi
 179
 180   run_and_report "Running bundle install" \
 181       $COMMAND_PREFIX bundle install --path $SHARED_PATH/vendor_bundle --quiet
 182
 183   echo -n "Ensuring directory and file permissions ..."
 184   # Ensure correct ownership of a few files
 185   chown "$WWW_OWNER" $RELEASE_PATH/config/environment.rb
 186   chown "$WWW_OWNER" $RELEASE_PATH/config.ru
 187   chown "$WWW_OWNER" $RELEASE_PATH/Gemfile.lock
 188   chown -R "$WWW_OWNER" $RELEASE_PATH/tmp
 189   chown -R "$WWW_OWNER" $SHARED_PATH/log
 190   case "$RAILSPKG_DATABASE_LOAD_TASK" in
 191       db:schema:load) chown "$WWW_OWNER" $RELEASE_PATH/db/schema.rb ;;
 192       db:structure:load) chown "$WWW_OWNER" $RELEASE_PATH/db/structure.sql ;;
 193   esac
 194   chmod 644 $SHARED_PATH/log/*
 195   chmod -R 2775 $RELEASE_PATH/tmp
 196   echo "... done."
 197
 198   if [ -n "$RAILSPKG_DATABASE_LOAD_TASK" ]; then
 199       chown "$WWW_OWNER" $RELEASE_PATH/config/database.yml
 200       prepare_database
 201   fi
 202
 203   if [ 11 = "$RAILSPKG_SUPPORTS_CONFIG_CHECK$APPLICATION_READY" ]; then
 204       run_and_report "Checking application.yml for completeness" \
 205           $COMMAND_PREFIX bundle exec rake config:check || APPLICATION_READY=0
 206   fi
 207
 208   # precompile assets; thankfully this does not take long
 209   if [ "$APPLICATION_READY" = "1" ]; then
 210       run_and_report "Precompiling assets" \
 211           $COMMAND_PREFIX bundle exec rake assets:precompile -q -s 2>/dev/null \
 212           || APPLICATION_READY=0
 213   else
 214       echo "Precompiling assets... skipped."
 215   fi
 216   chown -R "$WWW_OWNER" $RELEASE_PATH/tmp
 217
 218   if [ ! -z "$WEB_SERVICE" ]; then
 219       service "$WEB_SERVICE" restart
 220   fi
 221 }
 222
 223 if [ "$1" = configure ]; then
 224   # This is a debian-based system
 225   configure_version
 226 elif [ "$1" = "0" ] || [ "$1" = "1" ] || [ "$1" = "2" ]; then
 227   # This is an rpm-based system
 228   configure_version
 229 fi
 230
 231 report_not_ready "$DATABASE_READY" "$CONFIG_PATH/database.yml"
 232 report_not_ready "$APPLICATION_READY" "$CONFIG_PATH/application.yml"