WIP: Finish command-line tool to replace in file (TriBITSPub#274)

tribits/python_utils/lower_case_cmake.py

@@ -2,6 +2,7 @@
 # -*- coding: utf-8 -*-
 
 import sys
+import os
 import re
 
 
@@ -63,26 +64,40 @@ def makeRegexMatchesLowerCaseInCMakeStr(cmakeCodeStrIn, regex):
 
 usageHelp = r"""
 
-Convert the cmake command calls to lower case and the macro and function names
-to lower case in a given file.
+Convert the cmake command calls to lower case and macro and function names
+in defintions to lower case in a given file.
 """
 
 
 def getCmndLineOptions():
   from argparse import ArgumentParser, RawDescriptionHelpFormatter
   clp = ArgumentParser(description=usageHelp,
     formatter_class=RawDescriptionHelpFormatter)
-  clp.add_argument("file", nargs='?', default="",
-    help="The file to operate on" )
+  clp.add_argument("file",
+    help="The file to lower-case the CMake commands within." )
   options = clp.parse_args(sys.argv[1:])
   return options
 
 
+def validateCmndLineOptions(inOptions):
+  if not os.path.exists(inOptions.file):
+    print("Error, the file '"+inOptions.file+"' does not exist!")
+    sys.exit(1)
+
+
+def lowerCaseCMakeCodeInFile(inOptions):
+  with open(inOptions.file, 'r') as fileHandle:
+    cmakeStrOrig = fileHandle.read()
+  cmakeStrLowerCased = makeCmndsLowerCaseInCMakeStr(cmakeStrOrig)
+  with open(inOptions.file, 'w') as fileHandle:
+    fileHandle.write(cmakeStrLowerCased)
+
 #
 # main()
 #
 
+
 if __name__ == '__main__':
   inOptions = getCmndLineOptions()
-
-
+  validateCmndLineOptions(inOptions)
+  lowerCaseCMakeCodeInFile(inOptions)