On Tue, Sep 10, 2013 at 9:32 AM, Art Heimsoth <artst...@artheimsoth.com>wrote:
> I use the nsis installer to build and support my package. I also
> use ooSQLite in the package and prior to the last release of ooSQLite,
> I simply copied the needed files to the appropriate folder. That will
> still work, but I would like to add detection to my installer such
> that I would only install the ooSQLite modules if there is a later
> version or if it was not originally installed on the target system.
> For ooRexx and ooDialog, I use the system environment area in
> combination with a simple rexx command to collect the level of
> each component and then only install them if the ones in the release
> are a later level. Is this, or a similar method available with the
> ooSQLite release? All I would need would be a capability to
> detect if it is installed via Rexx and if so, return the level of
> the installed package. Thanks for any suggestions.
>
Hi Art,
I'm not sure if I completely understand your requirements for ooSQLite or
not, but it is similar to ooDialog in that it has a version command that
will tell you the level of the installed ooSQLite. In the examples under
examples\version there is version.rex that shows the different version
formats.
Here is one line from that file:
say 'ooSQLite version (compact): ' .ooSQLite~version('C')
The output is:
ooSQLite version (compact): 1.0.0.9416
on my system today. The compact version is always going to be
incrementally bigger for each build.
The one difference between ooSQLite and ooDialog, currently, is that if
ooRexx is installed, there is always some version of ooDialog installed.
That's not true for ooSQLite
The latest version of ooSQLite, on Windows, has a Windows installer that
installs ooSQLite to the ooRexx installation directory.
I'm not sure how you detect that ooRexx is installed. But, if ooSQlite is
installed using the Windows installer, you could detect it this way in
pseudo code:
if ooRexx installed then do
if file ooSQLite.dll exists in ooRexx installation directory then do
run ooSQLite version command
parse output for version
end
end
If ooSQlite is installed using the .zip file then the user could have
installed it anywhere. You could use a similar process as above. NSIS
might have a way to see if a file exists in the path. If so you could see
if ooSQLite.dll exists. If not you could do something like:
if ooRexx installed then do
run Rexx command to test for ooSQLite
parse output for version
end
In this last case you need a Rexx program that uses loadPackage() to load
ooSQLite.cls and traps an error. If you do get an error, then ooSQLite is
not installed. If you don't get any error, it is installed and then you
can go ahead and run you ooSQLite version command to get the installed
version.
Here is some code from the test suite (ooTest) that should give you an idea
on how to do that
signal on any name loadErr
.context~package~loadPackage('WinUtils.cls')
return
loadErr:
err = .ExceptionData~new(timeStamp(), s, .ExceptionData~TRAP)
err~setLine(sigl)
err~conditionObject = condition('O')
err~msg = "Could not load 'WinUtils.cls' the package needed for this test
group."
err~severity = "Unrecoverable"
testResult~addException(err)
testResult~stop
return
So, for ooSQLite, in pseudo code again, you would do something
signal on any name loadErr
.context~package~loadPackage('ooSQLite.cls')
-- Okay we have ooSQLite
ver = .ooSQLite~version('C')
compare ver to what you need
-- do whatever
return
loadErr:
-- Okay no ooSQLite on this machine,
-- or it is not installed correctly
do whatever
return
In this scenario, you could not be sure that ooSQLite is not installed, you
could just know that ooSQLite.cls is not in the default path. A user
could, for instance, have it installed somewhere and use a batch file to
add it to the path when they go to work with it. Not likely for a typical
user, but I often do that.
Let me know if you need more help on this topic.
By the way, the ooSQLite Windows installer writes some stuff to the
registry. In your NSIS installer, you could read those registry values to
see if they exist to test if ooSQLite is installed. This would only work
if it is a recent install of ooSQLite though.
--
Mark Miesfeld
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