[Gambas-user] check 4 Gambas Runtime files?

[Jussi Lahtinen]

There is standard for exit codes.
http://www.tldp.org/LDP/abs/html/exitcodes.html


Jussi

On Wed, Dec 13, 2017 at 8:02 PM, T Lee Davidson <t.lee.davidson at gmail.com>
wrote:

> [shell-script]
> #!/bin/bash
>
> which gbx3 &>/dev/null
> if [ $? -ne 0 ]; then
>     echo "Gambas runtime (gbx3) not found in path. Cannot continue."
>     exit 1 # arbitrary exit code of your choice
> fi
>
> if [[ $(gbx3 -e 'Comp(System.FullVersion, "3.10", gb.Natural) >= 0') ==
> "False" ]]; then
>     echo "So sorry."
>     exit 2 # also an arbitrary exit code
> fi
>
> # Great, do Gambas stuff now
> [/shell-script]
>
> The line under the "which" statement basically says, "If the exit code
> from the 'which' command is not equal to zero, then..."
>
>
> Strangely on my system, this prints, "So sorry," even though my package
> manager says version 3.10.0 of gambas-runtime is
> installed. I have to assume that's an issue with the packager.
>
>
> --
> Lee
>
> On 12/13/2017 12:33 PM, mikeB wrote:
> > OKAY then - I'll try that (what Tobi wrote). I just didn't really
> understand it but I will after hack'n at it for awhile;-)
> > THANKS - we can put this subject to bed unless someone has
> > something else,
> > mikeB
> >
> >
> >
> > On 12/13/2017 08:44 AM, Karl Reinl wrote:
> >> Am Mittwoch, den 13.12.2017, 08:26 -0700 schrieb mikeB:
> >>> thats what i was thinking (works only if Gambas is installed) but
> wasn't
> >>> sure.
> >>>
> >>> I really would prefer NOT to force the end user to install Gambas but
> >>> only the v10 runtime files that are required to run the Gambas
> developed
> >>> software/ program. A terminal command to just check if the v10 runtime
> >>> files are installed is really what I was looking for;-)
> >>>
> >>> thanks to all that have taken to time to respond -
> >>> it's highly APPRECIATED! Have learned something from every post.
> >>> mikeB
> >>>
> >>> On 12/13/2017 07:43 AM, PICCORO McKAY Lenz wrote:
> >>>> the suggestin from tobias are the best for check a specific version
> string,
> >>>> due return a exact result, not an interpretative result
> >>>>
> >>>> good, but only works if gambas are installed, if not return "commando
> not
> >>>> found"
> >>>>
> >>>>
> >>>>
> >>>> Lenz McKAY Gerardo (PICCORO)
> >>>> http://qgqlochekone.blogspot.com
> >>>>
> >>>> 2017-12-13 9:21 GMT-04:00 Jussi Lahtinen <jussi.lahtinen at gmail.com>:
> >>>>
> >>>>> gbx3 -V
> >>>>> or
> >>>>> gbx3 --version
> >>>>>
> >>>>> Works also...
> >>>>>
> >>>>>
> >>>>> Jussi
> >>>>>
> >>>>> On Wed, Dec 13, 2017 at 9:54 AM, Tobias Boege <taboege at gmail.com>
> wrote:
> >>>>>
> >>>>>> On Tue, 12 Dec 2017, mikeB wrote:
> >>>>>>> On my web site, that I offer software programmed using Gambas, I
> have a
> >>>>>>> notice :
> >>>>>>> ************************************************************
> ***********
> >>>>>>> VERY IMPORTANT: before installing this app you will need to install
> >>>>>> Gambas
> >>>>>>> Runtime  v10 files - most systems will not have these very new
> files
> >>>>>>> installed yet.
> >>>>>>>
> >>>>>>> Do so via the terminal commands:
> >>>>>>> sudo add-apt-repository ppa:gambas-team/gambas3
> >>>>>>> sudo apt-get update
> >>>>>>> ************************************************************
> ***********
> >>>>>>> Now that Gambas runtime 10 files are more common - being install
> by the
> >>>>>>> Distro - is there a way for the user (terminal command) to check if
> >>>>>> they are
> >>>>>>> installed?
> >>>>>>>
> >>>>>>> This is a real newbie question I'm sure but hey.. I'm a newbie!
> >>>>>>> Thanks for any all help on this matter and have a GREAT day,
> >>>>>>> mikeB
> >>>>>>>
> >>>>>>
> >>>>>> First check if the interpreter gbx3 is found in PATH, using the
> "which"
> >>>>>> utility. If not, I wouldn't call Gambas properly installed (although
> >>>>>> some people might disagree -- it's their computer -- but then they
> will
> >>>>>> be able to figure their Gambas version out themselves).
> >>>>>>
> >>>>>> Once you have that, the System class has FullVersion which gives
> you the
> >>>>>> Gambas version as a string and you can compare it like this:
> >>>>>>
> >>>>>>     $ gbx3 -e 'Comp(System.FullVersion, "3.10", gb.Natural) >= 0'
> >>>>>>
> >>>>>> Comp will return the sign (-1, 0 or 1) of subtracting the version
> 3.10
> >>>>>> from your Gambas version. You want the comparison to yield 0 or 1.
> >>>>>> With the above line, you will see either the string "True" or
> "False"
> >>>>>> printed to the terminal; you can make the output fancier.
> >>>>>>
> >>>>>> NOTE: gb.Natural makes the comparison by natural sort, which is
> >>>>>> appropriate
> >>>>>> to compare version numbers. Observe:
> >>>>>>
> >>>>>>     $ gbx3 -e 'Comp("3.2", "3.10")'
> >>>>>>     1
> >>>>>>     $ gbx3 -e 'Comp("3.2", "3.10", gb.Natural)'
> >>>>>>     -1
> >>>>>>
> >>>>>> Because "2" comes before "1" in the alphabet, the default
> lexicographic
> >>>>>> comparison mode declares the string "3.2" to be greater than "3.10",
> >>>>>> but gb.Natural gets it right.
> >>>>>>
> >>>>>> Also never coerce the string version into a float for easier
> comparison
> >>>>>> because you'll run into nasty bugs caused by float roundoff.
> >>>>>>
> >>>>>> Regards,
> >>>>>> Tobi
> >>>>>>
> >>>>>> --
> >>>>>> "There's an old saying: Don't change anything... ever!" -- Mr. Monk
> >>>>>>
> >>>>>
> >>
> >> Salut mikeB,
> >>
> >> reread what Tobi wrote: "which" is the magic command for that.
> >>
> >
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