When a batch-program will go to next line?

Question

I have a batch file

for /f "tokens=2 delims==" %%a in ('wmic OS Get localdatetime /value') do set "dt=%%a"
set "YY=%dt:~2,2%" & set "YYYY=%dt:~0,4%" & set "MM=%dt:~4,2%" & set "DD=%dt:~6,2%"
set "HH=%dt:~8,2%" & set "Min=%dt:~10,2%" & set "Sec=%dt:~12,2%"

set "my_date=%YYYY%%MM%%DD%" & set "time=%HH%%Min%"

set "minFiles=10"

setlocal EnableDelayedExpansion

rar a -t -rr D:\Backup\Arch\Backup_%_my_date%.rar D:\Backup\Backup.bak

for /f %%A in ('dir "D:\Backup\Arch\*.rar" /a-d-s-h /b ^| find /v /c ""') do if %%A leq %minFiles% goto :eof
:loop
for /f "delims=" %%a in ('dir /b /a-d /t:w /o:d "D:\Backup\Arch\*.rar"') do (
    del "%%a"
    goto :breakLoop
    )
:breakLoop
pause
for /f %%A in ('dir "D:\Backup\Arch\*.rar" /a-d-s-h /b ^| find /v /c ""') do if %%A gtr %minFiles% goto :loop

It is supposed to rar a file and then check if there is more than 10 files in folder delete oldest file. It works well until in folder D:\Backup\Arch\ are 10 rar files. But if in folder are 10 rar files and I start *.bat I get a new rar file in D:\Backup\Arch\ and now they are 11. It's supposed to go to next line delete one file if there are 11, but it doesn't delete. Why ? rar is taking 2 or 3 hours.

When program is here

rar a -t -rr D:\Backup\Arch\Backup_%_my_date%.rar D:\Backup\Backup.bak

and it's archiving file when does it go to next line

for /f %%A in ('dir "D:\Backup\Arch\*.rar" /a-d-s-h /b ^| find /v /c ""') do if %%A leq %minFiles% goto :eof

It goes when rar is finished or right after command rar is send ? How I can make program to go to the next line right after rar is finished ?

If I start a different bat with this part of code it works perfect and delete files

for /f %%A in ('dir "D:\Backup\Arch\*.rar" /a-d-s-h /b ^| find /v /c ""') do if %%A leq %minFiles% goto :eof
:loop
for /f "delims=" %%a in ('dir /b /a-d /t:w /o:d "D:\Backup\Arch\*.rar"') do (
    del "%%a"
    goto :breakLoop
    )
:breakLoop
pause
for /f %%A in ('dir "D:\Backup\Arch\*.rar" /a-d-s-h /b ^| find /v /c ""') do if %%A gtr %minFiles% goto :loop

Answer 1

As per my comment, I suggest to:

• use for /f with the skip option
• and parse dir output sorted reverse by name dir /B /A-D /O-N
• BTW you created a variable my_date but tried to use the nonexistent %_my_date%

---

:: Q:\Test\2019\06\14\SU_1448654.cmd
@Echo off & setlocal EnableDelayedExpansion
for /f "tokens=2 delims==" %%a in ('wmic OS Get localdatetime /value') do set "dt=%%a"
set "my_date=%dt:~0,8%
set "minFiles=10"

rar a -t -rr D:\Backup\Arch\Backup_%my_date%.rar D:\Backup\Backup.bak

for /f "skip=%minFiles% delims=" %%a in ('dir /B /A-d /O-N "D:\Backup\Arch\Backup_*.rar"') do (
    Echo del "%%a"
)
pause

If the output looks OK, remove the Echo in front of the del command