writing current date & time as file name using NSIS

I developed an installer using NSIS. Every time I re-install the application, I want to create a backup of the existing database files.

How can I rename these database files using the following format 'currentdatetime'(ex: 201003101140 means 2010-03-10 at 11:40 AM)?

开发者_StackOverflowThanks !

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There is a built-in function in NSIS for this called ${GetTime}

  !include "FileFunc.nsh"
  !insertmacro GetTime

  ${GetTime} "" "L" $0 $1 $2 $3 $4 $5 $6
  DetailPrint "currentdatetime=$2$1$0$4$5$6"

This will output something like

  currentdatetime=20130210205537

meaning "10-Feb-2013 20:55:37".

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System::Call '*(&i2,&i2,&i2,&i2,&i2,&i2,&i2,&i2)i.s'
System::Call /NOUNLOAD 'kernel32::GetLocalTime(isr0)'
System::Call '*$0(&i2.r1,&i2.r2,&i2,&i2.r3,&i2.r4,&i2.r5,&i2,&i2)'
System::Free $0
IntFmt $1 "%0.4d" $1
IntFmt $2 "%0.2d" $2
IntFmt $3 "%0.2d" $3
IntFmt $4 "%0.2d" $4
IntFmt $5 "%0.2d" $5
DetailPrint "datetime=$1$2$3$4$5"

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The best way to do this is explained here: nsis !define /date MyTIMESTAMP "%Y-%m-%d-%H-%M-%S" Name "MyApplicationName ${MyTIMESTAMP}" OutFile "MyApplicationNameSetup-${MyTIMESTAMP}.exe"

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These macros might work for you: http://nsis.sourceforge.net/Docs/Chapter5.html#5.2.3