Delete Files From Log: Difference between revisions

From NSIS Wiki
Jump to navigationJump to search
No edit summary
Line 24: Line 24:
         ...
         ...
</highlight-nsis>
</highlight-nsis>
== The Function ==
<highlight-nsis>
function un.DeleteFromLog
        ; R0 will be used as the log
        ; R1 will be used as the current directory
        ; R2 will be used as the current file
        ; R3 will be the file handle
        ; R4 will be the line
        ; R5 will be temp space
        exch $R0 ; gets the log
        push $R1 ; Backup $R1
        push $R2 ; Backup $R2
        push $R3 ; Backup $R3.  Stack is left in order $R0, $R1, $R2, etc
        push $R4
        push $R5
        FileOpen $R3 "$R0" "r"
NewLine:
        FileRead $R3 $R4
        ;MessageBox MB_OK "New Line: $R4"
        StrCpy $R5 $R4 15
        ;MessageBox MB_OK "Foldertest: $R5"
        StrCmp $R5 "Output folder: " ChangeDir ; Line specifies a directory
        StrCpy $R5 $R4 9
        ;MessageBox MB_OK "Filetest: $R5"
        StrCmp $R5 "Extract: " ChangeFile ; Line specifies a file
        StrCmp $R4 "" DoneAndDone ; Out of lines
        Goto NewLine ; If the line is none of the above, grab a new one.
       
ChangeDir:
        RMDir $R1 ; Try to remove the last directory
        StrCpy $R5 $R1
DeleteParents:
        ; Will attempt to delete parent directorys until it runs out
        ; not aggressive, just removes empty directories recurisvely
        ; before moving onto a new directory to delete files from
        Push $R5
        Call un.GetParent
        Pop $R5
        StrCmp $R5 "" +2
        RMDir $R5
        StrCmp $R5 "" 0 DeleteParents
        StrCpy $R1 $R4 1024 15 ; Get the new directory
        StrLen $R5 $R1
        IntOp $R5 $R5 - "2"
        StrCpy $R1 $R1 $R5 ; trims off the newline at the end
        Goto NewLine
ChangeFile:
        StrCpy $R2 $R4 1024 9 ; Get the new file
        StrLen $R5 $R2
        IntOp $R5 $R5 - "10"
        StrCpy $R2 $R2 $R5 ; trims off the ...100% and the newline
        Delete "$R1\$R2" ; Try to delete the new file
        Goto NewLine
DoneAndDone:
        FileClose $R3
        Pop $R5 ; Restore the registers
        Pop $R4
        Pop $R3
        Pop $R2
        Pop $R1
        Exch $R0
functionend
</highlight-nsis>
[[Category:Logging Functions]]

Revision as of 18:54, 14 January 2012

Author: Namrok (talk, contrib)


Description

I wrote a function that will read the log file written out using "Dump log to file" and delete just those files that were written, as well as any empty directories left. Just push the location of the logfile onto the stack before you run it. It will leave it there, so you could always pop it off again.

Bo: Depending on which compression you use, this might not work, because for example the lzma compressor generates log files with file entries that do not have the trailing "...100%" that this script relies on.

Bo: This script needs "Get_parent_directory" renamed to un.GetParent to work.

Boris: This script is not compatible with ZipDLL_plug-in. To use it with zipdll make the following changes: 

         ...
         StrCpy $R5 $R4 11
         ;MessageBox MB_OK "Filetest: $R5"
         StrCmp $R5 "  Extract :" ChangeFile ; Line specifies a file
         ...
ChangeFile:
         StrCpy $R2 $R4 1024 12 ; Get the new file
         StrLen $R5 $R2
         IntOp $R5 $R5 - "2"
         StrCpy $R2 $R2 $R5 ; trims off the the newline
         Delete "$R1\$R2" ; Try to delete the new file
         Goto NewLine
         ...
Retrieved from "https://nsis.sourceforge.io/mediawiki/index.php?title=Delete_Files_From_Log&oldid=21611"