On 9/16/16 3:06 PM, Eric Pruitt wrote:
> Bash Version: 4.4
> Patch Level: 0
> Release Status: release
>
> Description:
> In Bash 4.3, "${var/*/text}" would generate "" if var was a zero-length
> string and "text" if it contained at least one character. In Bash 4.4,
> this
> is
On Fri, Sep 16, 2016 at 03:45:39PM -0400, Greg Wooledge wrote:
> On Fri, Sep 16, 2016 at 12:38:20PM -0700, Eric Pruitt wrote:
> > first time. However, that construct still won't work because if a
> > variable is defined, it will still choose "not empty:"
> >
> > ericpruitt@sinister:~$ X=
> >
On Fri, Sep 16, 2016 at 12:38:20PM -0700, Eric Pruitt wrote:
> first time. However, that construct still won't work because if a
> variable is defined, it will still choose "not empty:"
>
> ericpruitt@sinister:~$ X=
> ericpruitt@sinister:~$ echo ${X+Not empty}
> Not empty
Then you wan
On Fri, Sep 16, 2016 at 12:30:59PM -0700, Eric Pruitt wrote:
> > That, or ${VAR:+not empty} which is how I suggest testing for variable
> > set-and-not-empty-ness.
>
> I'm aware of that construct, but that doesn't do what I want unless I'm
> missing something; I don't want to change the value of th
On Fri, Sep 16, 2016 at 12:30:59PM -0700, Eric Pruitt wrote:
> PS1="${SSH_TTY/?*/\\u@\\h:}\\W${jobs/?*/ [\\j]}\\$ "
>
> In this example, I want to show the username and hostname if SSH_TTY is
> set and not empty, but I do not want to modify its value. I am also
> showing the number of jobs
On Fri, Sep 16, 2016 at 03:22:29PM -0400, Greg Wooledge wrote:
> Off hand I'd say the bash 4.4 behavior is correct. * matches 0 or
> more characters, so it should match an empty or undefined variable.
Yes, I agree that the Bash 4.4 behavior is more reasonable, but I think
the change at least need
On Fri, Sep 16, 2016 at 12:06:53PM -0700, Eric Pruitt wrote:
> Bash 4.3:
> ericpruitt@sinister:~$ VAR=
> ericpruitt@sinister:~$ echo ${VAR/*/VAR was not empty}
>
> Bash 4.4:
> ericpruitt@sinister:~$ VAR=
> ericpruitt@sinister:~$ echo ${VAR/*/VAR was not e
Configuration Information [Automatically generated, do not change]:
Machine: x86_64
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS: -DPROGRAM='bash' -DCONF_HOSTTYPE='x86_64'
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='x86_64-unknown-linux-gnu'
-DCONF_VENDOR='unknown' -DLOCALEDIR='/usr/local/share
