[gentoo-user] bash scripting tip
There are quick'n'easy commands to goto the previous dir
-- 'cd -' , which cb aliased as 'p' --
goto the next-higher dir -- 'cd ..' , which cb aliased as 's' -- ,
but is there a way to set up a qne command to goto a parallel dir,
eg if you're in ~/tmp goto ~/hold ( 2 of my commonly-used dirs) ?
It needs to be a Bash function, so in ~/.bashrc
I tried 'function cd2() { cd .. ; cd $1 ; }',
so that 'cd2 hold' would take me where I wanted to go,
but it simply dropped me in ~ , the 2nd half being ignored.
It cb done with a shell var,
ie 'function cd2() { NEWDIR=$1 ; cd .. ; cd $NEWDIR ; NEWDIR= ; }',
which works but is a bit lengthy could clash with an existing shell var.
The elegant way is 'function cd2() { cd .. ; cd $$1 ; }' ;
the ... are essential: it fails without them or with ( ... ) instead.
HTH a few others.
--
,,
SUPPORT ___//___, Philip Webb
ELECTRIC /] [] [] [] [] []| Cities Centre, University of Toronto
TRANSIT`-O--O---' purslowatchassdotutorontodotca
Re: [gentoo-user] bash scripting tip
On 11/12/2010 09:57 AM, Philip Webb wrote:
There are quick'n'easy commands to goto the previous dir
-- 'cd -' , which cb aliased as 'p' --
goto the next-higher dir -- 'cd ..' , which cb aliased as 's' -- ,
but is there a way to set up a qne command to goto a parallel dir,
eg if you're in ~/tmp goto ~/hold ( 2 of my commonly-used dirs) ?
It needs to be a Bash function, so in ~/.bashrc
I tried 'function cd2() { cd .. ; cd $1 ; }',
so that 'cd2 hold' would take me where I wanted to go,
but it simply dropped me in ~ , the 2nd half being ignored.
It cb done with a shell var,
ie 'function cd2() { NEWDIR=$1 ; cd .. ; cd $NEWDIR ; NEWDIR= ; }',
which works but is a bit lengthy could clash with an existing shell var.
The elegant way is 'function cd2() { cd .. ; cd $$1 ; }' ;
the ... are essential: it fails without them or with ( ... ) instead.
HTH a few others.
cd ${PWD/old/new}
works when you're in /some/old/tree/directory and you want to go to
/some/new/tree/directory
Re: [gentoo-user] bash scripting tip
101112 Bill Longman wrote:
On 11/12/2010 09:57 AM, Philip Webb wrote:
but is there a way to set up a command to goto a parallel dir,
eg if you're in ~/tmp goto ~/hold ( 2 of my commonly-used dirs) ?
The elegant way is 'function cd2() { cd .. ; cd $$1 ; }'.
cd ${PWD/old/new}
works when you're in /some/old/tree/directory
and you want to go to /some/new/tree/directory
It works, but wouldn't be as useful for what I want to do,
as you'ld have to enter both 'old' 'new' after the function command.
ie instead of 'cd2 hold', you'ld have to write 'cd2 tmp hold':
it doesn't work if you try 'cd ${PWD/./hold}', which leaves you in 'tmp'.
For generally jumping round the dir tree, I recommend Cdargs.
--
,,
SUPPORT ___//___, Philip Webb
ELECTRIC /] [] [] [] [] []| Cities Centre, University of Toronto
TRANSIT`-O--O---' purslowatchassdotutorontodotca
Re: [gentoo-user] bash scripting tip
On 12 November 2010 09:57, Philip Webb purs...@ca.inter.net wrote:
It needs to be a Bash function, so in ~/.bashrc
I tried 'function cd2() { cd .. ; cd $1 ; }',
Doesn't
function cd2() { cd ../$1 }
work? (I haven't tried it.)
Re: [gentoo-user] bash scripting tip
On 12 November 2010 10:36, Hilco Wijbenga hilco.wijbe...@gmail.com wrote:
On 12 November 2010 09:57, Philip Webb purs...@ca.inter.net wrote:
It needs to be a Bash function, so in ~/.bashrc
I tried 'function cd2() { cd .. ; cd $1 ; }',
Doesn't
function cd2() { cd ../$1 }
work? (I haven't tried it.)
So yes, this:
function cd2() { cd ../$1; }
works.
Re: [gentoo-user] bash scripting tip
- Original Message
From: Hilco Wijbenga hilco.wijbe...@gmail.com
On 12 November 2010 10:36, Hilco Wijbenga hilco.wijbe...@gmail.com wrote:
On 12 November 2010 09:57, Philip Webb purs...@ca.inter.net wrote:
It needs to be a Bash function, so in ~/.bashrc
I tried 'function cd2() { cd .. ; cd $1 ; }',
Doesn't
function cd2() { cd ../$1 }
work? (I haven't tried it.)
So yes, this:
function cd2() { cd ../$1; }
works.
Something I have found useful is the pushd/popd functions in Bash.
Of course, to use them the way you want to you'd have to use two step procedure:
1. Init to the directory you want:
function cdInit()
{
pushd ${1} /dev/null
pushd ${2} /dev/null
}
2. cd away:
function cd2()
{
popd /dev/null
pushd ${1} /dev/null
}
3. close out when you're done:
function cdFini()
{
popd
}
You could probably modify the above do pull out the initial directory from a
single string by - e.g. turn /my/path/parent/child into /my/path/parent - as
well.
You could also process the DIRSTACK variable (or use the 'dirs' command) to see
if the parent directory is already on the stack too.
Note: I have the redirs in there because pushd/popd by default dumps the
DIRSTACK as its output.
$0.02
Ben
Re: [gentoo-user] bash scripting tip
101112 Hilco Wijbenga wrote:
On 12 November 2010 09:57, Philip Webb purs...@ca.inter.net wrote:
I tried 'function cd2() { cd .. ; cd $1 ; }',
Doesn't 'function cd2() { cd ../$1 ; }' work ? -- Yes
Yes, you're correct (slightly red face) !
I'm not sure why I didn't try that variation originally.
--
,,
SUPPORT ___//___, Philip Webb
ELECTRIC /] [] [] [] [] []| Cities Centre, University of Toronto
TRANSIT`-O--O---' purslowatchassdotutorontodotca
