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Subject: Re: Proposal for new cygwin.bat which is independent from install directory
To: cygwin AT cygwin DOT com
References: <57C06CFA DOT 4060405 AT t-online DOT de> <1974732522 DOT 20160826193931 AT yandex DOT ru> <daq2sb15dt33v54ekoc1p8f4snvepa0og0 AT 4ax DOT com>
From: Christian Franke <Christian DOT Franke AT t-online DOT de>
Message-ID: <57C1788B.2010705@t-online.de>
Date: Sat, 27 Aug 2016 13:24:59 +0200
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Bengt Larsson wrote:
> Andrey Repin wrote:
>>> The following should work since WinXP regardless of install directory:
>>> -----
>>> @echo off
>>>
>>> cd /d %~dp0
>>> if errorlevel 1 exit /b 1
>>> cd bin
>>> if errorlevel 1 exit /b 1
>>>
>>> bash --login -i
>>> -----
>> Why so complicated? 
> Also don't see why so complicated. While staying in the console, how
> about:
> -----
> @echo off
>
> cd /d "%~dp0\bin"
>
> bash --login -i
> -----

An errorlevel check is IMO mandatory after a cd command. Otherwise 
another bash in the PATH might be started if the directory does not exist.
Hmm... therefore it is also better to change the last line to:

   .\bash --login -i

The directory change is intentionally done with two cd commands to avoid 
possible problems with cmd variants (on Win10 "%~dp0" expands to a path 
with trailing backslash).


Christian


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