I'm attempting to install Pieradmin on a clean image of Pharo 1.4 (Summer), using the commands:
Gofer it
renggli: 'pier2addons';
package: 'ConfigurationOfPierAdmin';
load.
ConfigurationOfPierAdmin loadBleedingEdge.
It progresses for a while and comes up with the error:
This package depends on the following classes:
ImageSegment
You must resolve these dependencies before you will be able to load these definitions:
writeKernel:on:
You can proceed and it will finish installing all its dependencies.
I have two questions:
Where can I get the class ImageSegment?
Or, if I can't, does it matter that writeKernel:on: isn't there?
Nathan,
The dependency on ImageSegment is almost certainly coming from the package Pier-Pharo-Persistency defined in ConfigurationOfPier2>>baseline2060: where it is included as part of Core group for Pier ... which at first glance makes it appear that the Pier-Pharo-Persistency is pretty much required for Pier.
You could fiddle with the ConfigurationOfPier2>>baseline2060: and remove Pier-Pharo-Persistency from the Core group, then try the load again, but you may just be creating another more subtle problem for yourself. It's probably a good idea to ask this question on the Pier mailing list
OTOH, I'm pretty sure that Pier-Admin works in Pharo-1.3 so that would be your best option.
Dale
Yes, ImageSegment was removed from Pharo 1.4. And ReferenceStream was also removed from Pharo 2.0. The idea was to rely on new and better tools like Fuel serializer (see http://rmod.lille.inria.fr/web/pier/software/Fuel).
Yanni and me have done 2 things: Pier persistence and kernel export/import based on Fuel. You can find the code in:
Gofer it
squeaksource3: 'pierfuel';
package: 'Pier-FuelPersistence-Core';
package: 'Pier-FuelPersistence-Test';
load.
Then you can do, for example:
PRFuelExporterImporter new exportKernelNamed: 'pierDBX' toFilename: 'pierDBX.fuel'
And:
PRFuelExporterImporter new importNewKernelNamed: 'pierDBX' fromFilename: 'pierDBX.fuel'
Related
I have an app that runs perfectly without new dependencies like this one:
A newer version of androidx.navigation:navigation-fragment-ktx than 2.4.2 is available: 2.5.0
If I upgrade to v.2.5.0, my app has warnings about unrelated elements like for example references to menu objects.
Should I wait and allow these Gradle warnings such as above notice until another upgrade comes along and try the new dependency then?
You shouldn't need to update anything unless you have a reason to. It's often a good idea (as well as new features you also get bug fixes) but it's usually not required. Specifying all your dependency versions means you get a repeatable build that should always work, so long as those versions are available
The thing about libraries is they often have dependencies on other libraries, and updating one might introduce a requirement for other stuff to be updated (which might be why you're seeing other errors appear. That broadly shouldn't happen (making things independently updateable is part of the reason for breaking everything out into separate libraries!) but here's a blog post from when they introduced it:
Starting with the AndroidX refactor, library versions have been reset from 28.0.0 to 1.0.0. Future updates will be versioned on a per-library basis, following strict semantic versioning rules where the major version indicates binary compatibility. This means, for example, that a feature may be added to RecyclerView and used in your app without requiring an update to every other library used by your app. This also means that libraries depending on androidx may provide reasonable guarantees about binary compatibility with future releases of AndroidX -- that a dependency on a 1.5.0 revision will still work when run against 1.7.0 but will likely not work against 2.0.0.
Really you have to look at the release notes for a library to see if there are any breaking changes you need to worry about. For example, here's the one for the Activity Jetpack component and if you search "dependency changes" you'll see where updating actually requires a specific minimum version of another thing
Also sometimes a library will pull in an old version of another library it depends on, so you might be explicitly interacting with a very old version of a component just because you never added it as a dependency yourself. Then if that first library requires a much newer version of that dependency, you might suddenly get a large jump that requires a bunch of changes to your code, even though it doesn't seem to have anything to do with what you updated!
So, there is this cool package I've found but it leaves a lot to be desired. Since it made more sense to modify it, rather than build a new one myself, I changed the code in the corresponding source directory (C:\Users[my username].julia\v0.4[package name]\src). I made sure to modify not just the base.jl file, but also the [name of package].jl one so that there are no issues with dependencies or the new functions I added. I tried running the package several times to ensure that Julia doesn't spit out any errors or exceptions (the original package had some deprecated stuff, which I also remedied). Still, I fail to use the additional functionality of the package that I augmented. Any help would be greatly appreciated.
I'm using Julia ver 0.4.2, on a Windows 7 machine. As an IDE I use Notepad++. Thanks
I'm not exactly sure what you tried, but here's a guess as to what's going on: if you've already loaded the package in your julia session, edits to the source files won't take effect unless you explicitly reload the package. There are some good workflow tips here, and more explanation of the module system here.
However, for a newbie the easiest thing might be to quit julia and restart.
As far as making changes to a package, as Gnumic commented, your best approach is to make a branch and commit your changes there. Once you become convinced your changes represent an improvement, consider sharing your changes with the rest of the world.
Hi I've been playing a little bit with Frege and I just noticed in some examples that package and module are used interchangeably:
package MyModuleOne where
and sometimes:
module MyModuleTwo where
When importing from one or the other I don't see any difference in the behavior of my program. Is there something I should keep in mind when using package or module keywords ?
Yes. It used to start out with package, but later I realized this was an obstacle when porting Haskell code which uses module. Hence I added module, and thus currently module and package are the same keyword, just spelled differently.
But the intention is, of course, to retire package sooner or later. So my advice would be to use module only.
(This reminds me that I probably have to update the lang spec with regard to this. Never mind.)
I mean, can I use the com.sun.org.apache (all subpackages) classes as I use they from org.apache (in any Apache lib)?
Will the OpenJDK maintain this package up to date with apache updates?
And the JDK7 will maintain this package?
Where can I find information about that?
It is a very bad idea to use it. Once upon a time, Sun took a copy of Xerces, chock full of bugs. They made some changes. Perhaps they subtracted some bugs. We know that there are many very serious bugs that they did not subtract.
And they renamed it to com.sun.... for one reason: to tell you not to use it. At any time, in any point release, in any patch, they can change those classes incompatibly or remove them.
Further, these classes may not be in IBM's copy of the JRE, or Apple's, or (haha) Microsoft's, or JRocket.
If you want Xerces, use Xerces. To find information about this, read the Xerces-j mailing list archive for many stern warnings from the Xerces developers about the version forked by Sun.
The fact that the classes are formally 'public' means nothing except that Sun needed to be able to new them from some other package.
Err I wouldn't, just based on the fact that they're internal classes and there is a risk of them changing over time. Use the org.apache classes instead.
No idea about the intentions with keeping them up to date, maybe try posting a message on the openjdk forum:
http://mail.openjdk.java.net/mailman/listinfo
My understanding is that this is a fork of the apache code. At one point they were the same, but no more. So you can't count on the same bug fixes being present in both versions.
If documentation for this package says that it is public, then it's OK to use.
Otherwise they can pool a floor underneath you when they decide not to support it in the future.
Usually, you should not rely on anything other than java and javax in JDK.
I cannot use the most recent dev Pharo release because of some strange issues with the compiler built into Pharo. Well. I was wondering if there is a quick way to install all the nifty extras into Pharo that the core image misses, as compared to the dev image.
With all non-core Pharo images come a script which was used to build that image. Just edit that file and drag&drop it on a new core.
You could also tell me what you don't like in the Pharo images so that I can enhance them.
There is also the script I published on the Pharo wiki that I use to build my images:
http://code.google.com/p/pharo/wiki/ImageBuildScripts
Of course it is very specific to my preferences and needs, but you can take it as an example and adapt it to your own needs.
CommandShell works with Pharo 9.10.10. You will hit several errors as you try to load the package due to Pharo lacking MVC, but you can simply proceed past the first bunch and abandon the last one (that tries to actually open a CommandShell in Morphic). At that point, you'll have a class called PipeableOSProcess that can be used very easily to grab output. For example:
(PipeableOSProcess command: 'ls /bin') output
will return the contents of your bin directory as a string.
Ok, OB itself can be easily downloaded using ScriptLoader loadSuperOB.
Damien adds (from comment below):
The problem with that approach is that nobody really maintains it.
Moreover, you miss some configuration steps to enhance the use of OB
(for example, you won't have the OB-based browsers if you ask for the
senders of a message from a workspace)