BASH alias $1 $2 ... query

[dave selby]

2009/4/19 Loïc Grenié <loic.grenie at gmail.com>:
> 2009/4/19 Nils Kassube <kassube at gmx.net>:
>> dave selby wrote:
>>> I am writing an svn alias that does some stuff before it svn's
>>>
>>> #!/bin/bash
>>>
>>> echo -e '\n*** SAFE SVN ***\n'
>>>
>>> some tidying up  ....
>>>
>>> svn $1 $2 $3 $4 $5 $6 $7 $8 $9
>>>
>>> It works but '$1 $2 $3 $4 $5 $6 $7 $8 $9' is clumsy and does not
>>> always work - is there a neater way
>>
>> Sure.
>>
>> svn $@
>
>     Sorry, this is svn "$@" *with* quotes.
>
>> However I don't know why your method doesn't always work. There could be
>> at least 2 reasons:
>>
>> a) There may be more than 9 parameters but you only use the first 9.
>>
>> b) You didn't quote your parameters. If there are spaces in the original
>> parameters you would actually call svn with something wrong. Example:
>> You originally call your script with
>>
>> myscript "first parameter" "second parameter"
>>
>> The script would call svn with 4 parameters instead of 2:
>>
>> svn "first" "parameter" "second" "parameter"
>>
>> Therefore it would be better to use
>>
>> svn "$1" "$2" "$3" "$4" "$5" "$6" "$7" "$8" "$9"
>>
>> But don't use quoting with $@. If you used
>>
>> svn "$@"
>>
>> it would be only one parameter like this:
>>
>> svn "first parameter second parameter"
>
>    No ! It would separate parameters. Instead, svn "$*" would keep
>  only one parameter. If script is called ssvn, and is called with
>  arguments: ssvn first "second long" third, then
>
> svn $* would call svn first second long third (4 args)
> svn $@ would call call svn first second long third (4 args, same as before)
> svn "$*" would call svn "first second long third" (one arg)
> svn "$@" would call svn first "second long" third (3 args, as ssvn was called)
>
>     Hope this helps,
>
>           Loïc

svn "$@" works a treat

Dave