add cupsutils

CMakeLists.txt

@@ -118,6 +118,7 @@ find_package(DL REQUIRED)
 # we want to use systemd, if possible
 set(SYSTEMD_SERVICES_INSTALL_DIR "" CACHE PATH "Directory for systemd service files")
 INCLUDE(${CMAKE_MODULE_PATH}/systemdservice.cmake)
+INCLUDE(${CMAKE_MODULE_PATH}/cupsutils.cmake)
 
 message(STATUS "Mars Nwe version: ${MARS_NWE_VERSION}")
 message(STATUS "bin: ${CMAKE_INSTALL_FULL_BINDIR}")

cmake/modules/cupsutils.cmake

@@ -0,0 +1,64 @@
+# Optional CUPS command line utility support for SMArT WebUI.
+#
+# This module intentionally searches for the CUPS command line utilities
+# used by the WebUI, not for libcups development headers/libraries.
+#
+# Variables exported:
+#
+#   WITH_CUPSUTILS
+#       User option to enable/disable CUPS utility discovery.
+#
+#   HAVE_CUPSUTILS
+#       ON when the required CUPS utilities were found.
+#
+#   SMART_CUPS_ENABLE
+#       1 when HAVE_CUPSUTILS is ON, otherwise 0.  Intended for configure_file()
+#       into Perl config files.
+#
+#   CUPS_LPSTAT_EXECUTABLE
+#       Path to lpstat.
+#
+#   CUPS_LP_EXECUTABLE
+#       Path to lp.
+#
+#   CUPS_LPR_EXECUTABLE
+#       Optional path to lpr, if available.
+
+option(WITH_CUPSUTILS "Enable CUPS utility support for SMArT WebUI" ON)
+
+set(HAVE_CUPSUTILS OFF)
+set(SMART_CUPS_ENABLE 0)
+
+if(WITH_CUPSUTILS)
+    find_program(CUPS_LPSTAT_EXECUTABLE NAMES lpstat)
+    find_program(CUPS_LP_EXECUTABLE NAMES lp)
+    find_program(CUPS_LPR_EXECUTABLE NAMES lpr)
+
+    if(CUPS_LPSTAT_EXECUTABLE AND CUPS_LP_EXECUTABLE)
+        set(HAVE_CUPSUTILS ON)
+        set(SMART_CUPS_ENABLE 1)
+        message(STATUS "Found CUPS utilities: lpstat=${CUPS_LPSTAT_EXECUTABLE}, lp=${CUPS_LP_EXECUTABLE}")
+        if(CUPS_LPR_EXECUTABLE)
+            message(STATUS "Found optional CUPS lpr utility: ${CUPS_LPR_EXECUTABLE}")
+        endif()
+    else()
+        message(STATUS "CUPS utilities not found; SMArT WebUI CUPS printer discovery disabled")
+    endif()
+else()
+    message(STATUS "CUPS utility support disabled")
+endif()
+
+# Provide stable fallback strings for configure_file() consumers.  These are
+# only used when SMART_CUPS_ENABLE is 0 or when the admin later overrides the
+# paths in smart.conf.
+if(NOT CUPS_LPSTAT_EXECUTABLE)
+    set(CUPS_LPSTAT_EXECUTABLE "/usr/bin/lpstat")
+endif()
+
+if(NOT CUPS_LP_EXECUTABLE)
+    set(CUPS_LP_EXECUTABLE "/usr/bin/lp")
+endif()
+
+if(NOT CUPS_LPR_EXECUTABLE)
+    set(CUPS_LPR_EXECUTABLE "/usr/bin/lpr")
+endif()