Support list-valued EDITORCONFIG_CMD

In run_and_sort, instead of taking a separate program and arguments,
take an undifferentiated command line.  This permits either
EDITORCONFIG_CMD or ECARGS to be either list- or string-valued.

cmake/ec_sort.cmake

@@ -4,6 +4,8 @@
 
 # Call as, e.g.:
 # cmake -D EDITORCONFIG_CMD="../editorconfig" -D ECARGS:LIST="-f;.editorconfig;foo" -P cmake/ec_sort.cmake
+# EDITORCONFIG_CMD may also be list-valued.  EDITORCONFIG_CMD and ECARGS
+# are put together on the command line, in that order, and split by CMake.
 
 # BSD-2-Clause
 # Copyright 2018 Christopher White (cxw42 at GitHub; http://devwrench.com)
@@ -38,6 +40,11 @@ list(APPEND CMAKE_MODULE_PATH "${tests_cmake_ec_sort_dir}/../cmake")
 include(runandsort)
 
 # Required parameters are in variables: EDITORCONFIG_CMD and ECARGS
+if("${EDITORCONFIG_CMD}" STREQUAL "")
+    message(FATAL_ERROR "No EDITORCONFIG_CMD parameter specified")
+    return()
+endif()
+
 if("${ECARGS}" STREQUAL "")
     message(FATAL_ERROR "No ECARGS parameter specified")
     return()
@@ -47,8 +54,7 @@ endif()
 #message(FATAL_ERROR " Running ${EDITORCONFIG_CMD} with ${ECARGS}")
 
 run_and_sort(RETVAL lines RETVAL_FAILURE did_fail
-    PGM "${EDITORCONFIG_CMD}"
-    ARGS ${ECARGS}
+    CMDLINE ${EDITORCONFIG_CMD} ${ECARGS}
 )
 
 if(${did_fail})

cmake/runandsort.cmake

@@ -48,8 +48,7 @@ cmake_minimum_required(VERSION 3.5)
 
 # Arguments:
 #   RETVAL .  .  .  .  .  .  .  The name of the variable to store the result in
-#   PGM .  .  .  .  .  .  .  .  The program to run
-#   ARGS .  .  .  .  .  .  .  . Any arguments to pass to the program
+#   CMDLINE .  .  .  .  .  .  . The program to run, and any arguments
 #   RETVAL_FAILURE .  .  .  .   If present, a variable that will be set to TRUE
 #                               if PGM returns a non-zero exit code.
 #   CAPTURE_STDERR .  .  .  .   If present, capture stderr instead of stdout
@@ -64,13 +63,13 @@ cmake_minimum_required(VERSION 3.5)
 function(run_and_sort)
     # Argument parsing
     set(option_keywords CAPTURE_STDERR TRIM_INITIAL_LEADING_SPACE)
-    set(one_value_keywords RETVAL RETVAL_FAILURE PGM)
-    set(multi_value_keywords ARGS)
+    set(one_value_keywords RETVAL RETVAL_FAILURE)
+    set(multi_value_keywords CMDLINE ARGS)
     cmake_parse_arguments(P "${option_keywords}" "${one_value_keywords}"
                             "${multi_value_keywords}" ${ARGN})
 
-    #message(STATUS "Running ${P_PGM} with ${P_ARGS}")
-    execute_process(COMMAND "${P_PGM}" ${P_ARGS}
+    #message(STATUS "Running ${P_CMDLINE}")
+    execute_process(COMMAND ${P_CMDLINE}
         RESULT_VARIABLE ep_retval
         OUTPUT_VARIABLE ep_stdout
         ERROR_VARIABLE ep_stderr

meta/sample.cmake

@@ -9,8 +9,8 @@ include( runandsort )
 
 run_and_sort( RETVAL lines RETVAL_FAILURE did_fail
     CAPTURE_STDERR TRIM_INITIAL_LEADING_SPACE   # since we're using almostcat
-    PGM "cmake"
-    ARGS "-DWHICH:STRING=${tests_meta_sample_dir}/sample.txt" "-P" "${tests_meta_sample_dir}/../cmake/almostcat.cmake"
+    CMDLINE "cmake" "-DWHICH:STRING=${tests_meta_sample_dir}/sample.txt"
+            "-P" "${tests_meta_sample_dir}/../cmake/almostcat.cmake"
 )       # Don't use cat(1) since we might be running on Windows
 
 if( ${did_fail} )