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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for November 25th, 2020

`exit /b #`: set `errorlevel` to `#`, then exit batch file or subroutine – via: Errorlevel – Windows CMD – SS64.com

Posted by jpluimers on 2020/11/25

I seem to always forget how to set an error leve in side a batch file, but [WayBack] Errorlevel – Windows CMD – SS64.com tells how:

  • When ending a [WayBacksubroutine, you can use EXIT /b N to set a specific ERRORLEVEL N.
  • You can make a [WayBackbatch file return a non-zero exit code by using the [WayBackEXIT command.

    Exit 0
    Exit /B 5

    To force an ERRORLEVEL of 1 to be set without exiting, run a small but invalid command like [WayBack]COLOR 00 

    There is a key difference between the way .CMD and .BAT batch files set errorlevels:

    An old .BAT batch script running the ‘new’ internal commands: APPEND, ASSOC, PATH, PROMPT, FTYPE and SET will only set ERRORLEVEL if an error occurs. So if you have two commands in the batch script and the first fails, the ERRORLEVEL will remain set even after the second command succeeds.

    This can make debugging a problem BAT script more difficult, a CMD batch script is more consistent and will set ERRORLEVEL after every command that you run [[archive.is]source].

It looks like I already used a bare EXIT /B without explaining it in Source: stop/start IIS.

Further reading, including the difference between subroutines, blocks and batch files:

Finally saving Google Groups messages in the way back machine:

  1. Convert the URL
  2. Save the latter in archive.is

–jeroen

Posted in Batch-Files, Development, Software Development | Leave a Comment »

git – I ran into a merge conflict. How can I abort the merge? – Stack Overflow

Posted by jpluimers on 2020/11/25

Since I keep forgetting how simple it is: [WayBack] git – I ran into a merge conflict. How can I abort the merge? – Stack Overflow

If your git version is >= 1.6.1, you can use git reset --merge.

Also, as @Michael Johnson mentions, if your git version is >= 1.7.4, you can also use git merge --abort.

As always, make sure you have no uncommitted changes before you start a merge.

From the git merge man page:

git merge --abort is equivalent to git reset --merge when MERGE_HEAD is present.

MERGE_HEAD is present when a merge is in progress.

Also, regarding uncommitted changes when starting a merge:

If you have changes you don’t want to commit before starting a merge, just git stash them before the merge and git stash pop after finishing the merge or aborting it.

–jeroen

Posted in Development, DVCS - Distributed Version Control, git, Software Development, Source Code Management | Leave a Comment »

Delphi: why breakpoints from time to time are not usable (green highlighted line on IDE)? – Stack Overflow

Posted by jpluimers on 2020/11/25

I still have not figured out the circumstances, but ever since either the Unicode Delphi versions (2009 and up) or BDS (8 and up), I have this every now and then: [WayBack] Delphi: why breakpoints from time to time are not usable (green highlighted line on IDE)? – Stack Overflow

So far this is consistent, limiting it to:

  • large projects (100+ kilo-lines-of-code)
  • for those projects, either as single .dproj file or as part of a .groupproj
  • debugging works the first time, but fails consistently with these symptoms:
    • break-points fail
    • blue dots in the gutter disappear; red-dots become green
    • exceptions cause a stack-trace with only hex-addresses
  • other projects in the same project group still debug fine

To get it working (one time per try) again:

  • restart the IDE
  • close the project, then re-open it in the same IDE instance

What does not help getting it to work:

  • clean build from the IDE
  • deleting DCU files

–jeroen

Posted in Delphi, Development, Software Development | Leave a Comment »

 
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