Added a function to clean out old project files no longer needed

nw/project/project.py

@@ -22,6 +22,7 @@ from time import time
 
 from nw.project.status import NWStatus
 from nw.project.item import NWItem
+from nw.tools import projectMaintenance
 from nw.common import checkString, checkBool, checkInt
 from nw.constants import (
     nwFiles, nwConst, nwItemType, nwItemClass, nwItemLayout, nwAlert
@@ -200,6 +201,11 @@ class NWProject():
         if not self._checkFolder(self.projMeta):
             return
 
+        try:
+            projectMaintenance(self)
+        except Exception as E:
+            logger.error(str(E))
+
         try:
             nwXML = etree.parse(fileName)
         except Exception as e:

nw/tools/__init__.py

@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 
 from nw.tools.analyse import TextAnalysis
+from nw.tools.legacy import projectMaintenance
 from nw.tools.optlaststate import OptLastState
 from nw.tools.spellcheck import NWSpellCheck
 from nw.tools.spellenchant import NWSpellEnchant
@@ -10,6 +11,7 @@ from nw.tools.wordcount import countWords
 
 __all__ = [
     "TextAnalysis",
+    "projectMaintenance",
     "OptLastState",
     "NWSpellCheck",
     "NWSpellEnchant",

nw/tools/legacy.py

@@ -0,0 +1,47 @@
+# -*- coding: utf-8 -*-
+"""novelWriter Legacy Tools
+
+ novelWriter – Legacy Tools
+============================
+ Various functions to handle old projects
+
+ File History:
+ Created: 2020-02-13 [0.4.3]
+
+"""
+
+import logging
+import nw
+
+from os import path, unlink, rmdir
+
+logger = logging.getLogger(__name__)
+
+def projectMaintenance(theProject):
+    """Wrapper class for handling various tasks related to managing old
+    projects with content from older versions of novelWriter.
+    """
+
+    # Remove no longer used project cache folder
+    if path.isdir(theProject.projPath):
+        cacheDir = path.join(theProject.projPath, "cache")
+        if path.isdir(cacheDir):
+            logger.info("Deprecated cache folder found")
+            rmList = []
+            for i in range(10):
+                rmList.append(path.join(cacheDir, "nwProject.nwx.%d" % i))
+            rmList.append(path.join(cacheDir, "projCount.txt"))
+            for rmFile in rmList:
+                if path.isfile(rmFile):
+                    logger.info("Deleting: %s" % rmFile)
+                    try:
+                        unlink(rmFile)
+                    except Exception as e:
+                        logger.error(str(e))
+            logger.info("Deleting: %s" % cacheDir)
+            try:
+                rmdir(cacheDir)
+            except Exception as e:
+                logger.error(str(e))
+
+    return