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Batch Script to check date created of 2 exe. If source is newer, run command

Posted on 2016-11-17
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Last Modified: 2016-11-23
I am looking to have a scheduled weekly task to run a script that will compare to .exes . If source is newer than run a setup command.  

It will be used on Windows 10 Pro PCs.
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Question by:GGHC
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Assisted Solution

by:Bill Prew
Bill Prew earned 300 total points (awarded by participants)
ID: 41892355
Here's an approach, take a look and see if this makes sense.

@echo off
setlocal

rem Define full paths to the two files to compare
set File1=c:\temp\file1.txt
set File2=c:\temp\file2.txt

rem Determine the newest file of the two
set Newest=
for /f "tokens=*" %%A in ('dir /s /b /o-d "%File1%" "%File2%"') do (
  if not defined Newest set Newest=%%~A
)

rem Perform logic when file1 is the newest
if /i "%File1%" EQU "%Newest%" (
  rem LOGIC FOR WHEN FILE1 IS NEWEST HERE
)

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~bp
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Expert Comment

by:Steve Knight
ID: 41892624
That sounds good.  I was thinking of suggesting xcopy before I saw Bill had already responded.  As you can use xcopy to copy a file if newer, I was thinking of using /L option to not copy but just say if it needed to copy, i.e.
xcopy /d /l /y file2.exe file1.exe

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If file2.exe is newer than file1.exe then it will show the filename and 1 File(s) otherwise 0 File(s)

You could use that inside a script if wanted along the lines of:

xcopy /d /l /y file2.exe file1.exe | find /v "0 File" > NUL

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The errorlevel from that of 1 would mean the files are the same, errorlevel 0 means do the copy

xcopy /d /l /y file2.exe file1.exe | find /v "0 File" > NUL && ECHO NEED TO COPY NEWER FILE

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or
xcopy /d /l /y file2.exe file1.exe | find /v "0 File" > NUL
if errorlevel 0 ECHO NEED TO COP NEWER FILE

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Bill's technique looks neater but that should work too if needed.

Steve
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Author Comment

by:GGHC
ID: 41892785
Nice!
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Assisted Solution

by:Steve Knight
Steve Knight earned 200 total points (awarded by participants)
ID: 41892809
Bill,

Does that work for you if the files are in different directories?  When I tried it seems to treat the /b output the same as the non-bare output, i.e. just report the first file then the second file regardless of order IF they are in separate dirs?

That may not be an issue if the two are in the same dir anyway for the requirement but doesn't work for me?

Steve

Using:
set File1=c:\users\stephen\1\x.txt
set File2=c:\users\stephen\2\x.txt
C:\Users\stephen>checkages
FILE 1 - c:\users\stephen\1\x.txt is newest

FILE1: c:\users\stephen\1\x.txt      18/11/2016  13:05            16,724 x.txt
FILE2: c:\users\stephen\2\x.txt      18/11/2016  13:12                88 x.txt

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Steve
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Accepted Solution

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Bill Prew earned 300 total points (awarded by participants)
ID: 41892972
Good eye Steve, it's too bad DIR isn't smart enough to sort across multiple locations, argh.

So then, this should cover that possibility.  I would also recommend adding additional logic in the main script that checks that both files exist before using this logic.  Since it wasn't stated if that condition could exist and what action to take I won't include it here.

I'm going to reopen this question, I would suggest the poster accept this solution after testing, and also give an assist to Steve for catching a possible use case that could be a problem with the original script.

@echo off
setlocal

rem Define full paths to the two files to compare
set File1=b:\ee\temp\d1\file1.txt
set File2=b:\ee\temp\d2\file2.txt

rem Determine the newest file of the two
for /F "tokens=1" %%A in ('xcopy /DHYL "%File1%" "%File2%" ^| findstr /I "File"') do (
  if "%%A"=="1" (set Newest=%File1%) else (set Newest=%File2%)
)

rem Perform logic when file1 is the newest
if /i "%File1%" EQU "%Newest%" (
  rem LOGIC FOR WHEN FILE1 IS NEWEST HERE
)

Open in new window

~bp
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LVL 53

Expert Comment

by:Bill Prew
ID: 41893035
Change point split to:

    Bill Prew's comment #a41892972 (200 points)
    Bill Prew's comment #a41892355 (100 points)
    Steve Knight's comment #a41892624 (200 points)

~bp
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