I just wrote this, I think it's quite handy. It takes two folders, one of a "new version" and one of an "old version", and creates an output folder with a patch containing all the files which are new or changed between the old and new versions. This allows you to easily create patches for programs without having to remember every little change you made. It also generates a list of all the files in the patch, in a text file. It runs best under BlitzPlus but should work in Blitz3D as well.
; Detects changes between two folders and compiles a directory of files that have changed w/ list
; Settings
Global FO$ = "Another Life Old" ; Folder containing old version
Global FN$ = "Another Life New" ; Folder containing new version
Global Output$ = "Another Life" ; Folder to output patch and files list to
; Go through files/folders recursively and compare to files in old version
ChangeDir FN$
Global FileList = WriteFile(Output$ + "\FilesList.txt")
CheckFolder(".")
CloseFile FileList
Print "Done!"
End
; Checks a folder for changed files compared to old version and adds changes to files list
Function CheckFolder(Folder$)
Print "Checking: " + Folder$ + "..."
; Loop through items
F = ReadDir(Folder$)
Item$ = NextFile$(F)
While Item$ <> ""
If Item$ <> "." And Item$ <> ".."
Print " " + Item$
; File - compare
If FileType(Folder$ + "\" + Item$) = 1
; It does exist in old version - check sizes
If FileType("..\" + FO$ + "\" + Folder$ + "\" + Item$) = 1
; Different sizes - list it
If FileSize(Folder$ + "\" + Item$) <> FileSize("..\" + FO$ + "\" + Folder$ + "\" + Item$)
ListFile Folder$ + "\" + Item$
; Same sizes, do checksum
Else
; Count new checksum
NewCheck = 0 : OldCheck = 0
FCheck = ReadFile(Folder$ + "\" + Item$)
While Eof(FCheck) = False
NewCheck = NewCheck + ReadInt(FCheck)
Wend
CloseFile FCheck
FCheck = ReadFile("..\" + FO$ + "\" + Folder$ + "\" + Item$)
While Eof(FCheck) = False
OldCheck = OldCheck + ReadInt(FCheck)
Wend
CloseFile FCheck
; It changed - list it
If NewCheck <> OldCheck
ListFile Folder$ + "\" + Item$
EndIf
EndIf
; It doesn't exist in old version - list it
Else
ListFile Folder$ + "\" + Item$
EndIf
; Folder - write to output and recurse
ElseIf FileType(Folder$ + "\" + Item$) = 2
CreateDir "..\" + Output$ + "\" + Folder$ + "\" + Item$
CheckFolder(Folder$ + "\" + Item$)
EndIf
EndIf
Item$ = NextFile$(F)
Wend
CloseDir F
End Function
; Lists a file and copies it to output folder
Function ListFile(Path$)
WriteLine FileList, Right$(Path$, Len(Path$) - 2)
CopyFile Path$, "..\" + Output$ + "\" + Path$
End Function
To decide if a file has changed, first it checks if that file existed in the old version. If it did, it checks to see if the file size has changed. If the size is the same, it adds up all the bytes in the file for a sort of checksum, just in case it has changed but remained the same size.
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