#!/bin/sh
# postinst: runs after DSM copied the package files, at install and at the
# install half of an upgrade (SYNOPKG_PKG_STATUS=INSTALL or UPGRADE). During an
# upgrade, postupgrade follows it.
#
# Order: the SDK's postinst steps first (executor, Shared Folder, portal), then
# this script. If the SDK steps fail, this script does not run.
#
# Runs as the package account, never as root. Root work belongs in root/*.sh
# through the SDK executor (synopkgland add root-ops).
#
# Environment (DSM sets these; the SDK passes them through unchanged):
#   SYNOPKG_PKGNAME, SYNOPKG_PKGVER   package id and the version being installed
#   SYNOPKG_OLD_PKGVER                the previous version (upgrade only)
#   SYNOPKG_PKG_STATUS                INSTALL, UPGRADE, UNINSTALL, START, STOP,
#                                     or empty at boot and shutdown
#   SYNOPKG_PKGDEST                   installed files (/var/packages/<id>/target)
#   SYNOPKG_PKGVAR, SYNOPKG_PKGHOME   package data and home; kept across upgrades
#   SYNOPKG_TEMP_LOGFILE              write a message for the user here
#   SYNOPKG_DSM_LANGUAGE              DSM language code (enu, cht, chs, jpn, ...)
#   SYNOPKG_DSM_VERSION_MAJOR, _MINOR, _BUILD, SYNOPKG_DSM_ARCH
#   SYNOPKG_USERNAME                  who started the action; empty when DSM did
#
# Install wizard answers arrive as environment variables named by each item's
# key ("true", "false" or text). The SDK's own wizard keys are not for you.
#
# Exit code: 0 is success; non-zero leaves the package in a failed state
# (DSM's own rule).
#
# To tell the user why something failed, write plain text to the message file
# and exit non-zero; DSM shows it after the action:
#   echo "Port 8080 is already in use." > "$SYNOPKG_TEMP_LOGFILE"
#   exit 1
#
# Do not:
#   - start, stop or clean up what the SDK owns (daemon, background worker,
#     executor, portal, Shared Folder, app data deletion, uninstall.purge);
#   - need root or try to gain it;
#   - block for long: neither DSM nor the SDK documents a timeout, so a script
#     that hangs blocks Package Center.
#
# More: synopkgland skill show lifecycle

# Example: create the App's own folder in its data directory.
# mkdir -p "$SYNOPKG_PKGVAR/cache" || exit 1

exit 0
