[Gambas-user] check 4 Gambas Runtime files?

[mikeB]

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.
>