1 files changed, 76 insertions, 0 deletions
diff --git a/compilerplugins/clang/mergeclasses.py b/compilerplugins/clang/mergeclasses.py
new file mode 100755
index 0000000000..bbd4697242
--- /dev/null
+++ b/compilerplugins/clang/mergeclasses.py
@@ -0,0 +1,76 @@
+#!/usr/bin/python3
+
+instantiatedSet = set()
+definitionSet = set()
+parentChildDict = {}
+definitionToFileDict = {}
+
+with open("workdir/loplugin.mergeclasses.log") as txt:
+    for line in txt:
+        tokens = line.strip().split("\t")
+    
+        if len(tokens) == 1:
+            pass
+
+        elif tokens[0] == "instantiated:":
+            clazzName = tokens[1]
+            if (clazzName.startswith("const ")):
+                clazzName = clazzName[6:]
+            if (clazzName.startswith("class ")):
+                clazzName = clazzName[6:]
+            if (clazzName.startswith("::")):
+                clazzName = clazzName[2:]
+            instantiatedSet.add(clazzName)
+            
+        elif tokens[0] == "definition:":
+            clazzName = tokens[1]
+            # the 1.. is so we skip the leading /
+            fileName  = tokens[2][1:]
+            definitionSet.add(clazzName)
+            definitionToFileDict[clazzName] = fileName
+            
+        elif tokens[0] == "has-subclass:":
+            child  = tokens[1]
+            parent = tokens[2]
+            if (parent.startswith("class ")):
+                parent = parent[6:]
+            elif (parent.startswith("struct ")):
+                parent = parent[7:]
+            if (child.startswith("class ")):
+                child = child[6:]
+            elif (child.startswith("struct ")):
+                child = child[7:]
+            if (parent not in parentChildDict):
+                parentChildDict[parent] = set()
+            parentChildDict[parent].add(child)
+
+def extractModuleName(clazz):
+    filename = definitionToFileDict[clazz]
+    if filename.startswith("include/"):
+        filename = filename[8:]
+    idx = filename.find("/")
+    return filename[:idx]
+
+with open("compilerplugins/clang/mergeclasses.results", "wt") as f:
+    # loop over defined, but not instantiated classes
+    for clazz in sorted(definitionSet - instantiatedSet):
+        if clazz == "svl::IUndoManager": print(parentChildDict[clazz])
+        # ignore classes without any children, and classes with more than one child
+        if (clazz not in parentChildDict) or (len(parentChildDict[clazz]) != 1):
+            continue
+        # exclude some common false positives
+        a = ['Dialog', 'Dlg', 'com::sun']
+        if any(x in clazz for x in a):
+            continue
+        # ignore base class that contain the word "mutex", they are normally there to
+        # help with the WeakComponentImpl template magic
+        if ("mutex" in clazz) or ("Mutex" in clazz):
+            continue
+        otherclazz = next(iter(parentChildDict[clazz]))
+        if clazz == "svl::IUndoManager": print(extractModuleName(clazz))
+        if otherclazz == "svl::IUndoManager": print(extractModuleName(otherclazz))
+        # exclude combinations that span modules because we often use those to make cross-module dependencies more manageable.
+        if extractModuleName(clazz) != extractModuleName(otherclazz):
+            continue
+        f.write( "merge " + clazz + " with " + otherclazz + "\n" )
+