I am unable to get the --sourcepath option of groovyc to work at all. Can someone furnish a trivial example of it actually doing anything?
Ultimately I want to use "groovyc" at the command line with a directory a packaged organized tree of mixed groovy and java source. I don't want to reference each source file explicitly. And I don't want to use an ant or maven task either, on grounds of both principle (hey is there a bug here?) and because the production scenario that I might want to tweak the source in has neither but will have groovy. I know I could use unix find but must I resort to that?!
sourcepath isn't used anymore. It's only there for backwards compatibility and will be removed in the future.
The Groovy documentation is currently rewritten, you can find a snapshot including the documentation for groovyc here: https://dl.dropboxusercontent.com/u/20288797/groovy-documentation/index.html#ThegroovycAntTask-groovyc
Related
I am attempting to convert parts of an Android app to iOS using Doppl, and I am getting a strange result: Doppl keeps trying to pull in android.arch.lifecycle:reactivestreams, even though I don't want it to.
Specifically, in app/build/j2objcSrcGenMain/android/arch/lifecycle/, there is a reactivestrams/ subdirectory with R.h and R.m files in it. This seems to make Xcode cranky and may explain why I had some oddities with pod install.
My app/build.gradle has compile "android.arch.lifecycle:reactivestreams:$archVer", because my activity is using LiveDataReactiveStreams.fromPublisher(). However:
The activity is not in the translatePattern (and since its code is not showing up in app/build/j2objcSrcGenMain/, I have to assume that the translatePattern is fine)
I do not have a doppl statement related to reactivestreams, because there does not appear to be a Doppl conversion of this library (nor should it be needed here)
AFAIK, nowhere else in this app am I referring to LiveDataReactiveStreams, which AFAIK is the one-and-only public class from the reactivestreams library
So, the questions:
What determines whether Doppl creates R.h and R.m files for some dependency? It's not the existence of a doppl statement, as I have doppl statements for a lot of other dependencies (RxJava, RxAndroid, Retrofit) and those do not get R.h and R.m files. It's not whether the dependency is referenced from generated code, as my repository definitely uses RxJava and Retrofit, yet there are no R files for those.
How can I figure out why Doppl generates R.h and R.m for reactivestreams?
Once I get this cleared up... do I re-run pod install, or is there some other pod command to refresh an existing pod with a new implementation?
Look into 'app/build/generated/source/r/debug' and confirm there's an R.java being created for the architecture component. It'll be under 'android/arch/lifecycle/reactivestrams'.
I think there are 2 problems here.
Problem 1
Somehow Doppl/J2objc is of the opinion that this file should be transpiled. It could be either that 'translatePattern' matches with it, or that something in the shared code is referencing it. If you can't figure out which, please post a comment and I'll try to help (or post in slack group).
Problem 2
Regardless of why that 'R.java' is being sucked into the translate step, because of how stock J2objc is configured, the code is being generated with package folders instead of creating One Big Name. That generated file should be called 'AndroidArchLifecycleReactivestramsR.h' (and AndroidArchLifecycleReactivestramsR.m). Xcode really doesn't like package folders. That's why there's a slightly custom J2ojbc being used with Doppl, so we can have files with big names instead of folders.
In cases where you intentionally use package names that match with what J2objc considers to be "system" classes, you need to provide a header mapping file to force long names. The 'androidbase' doppl library needs to add a lot of files that are in the 'android' package, which J2objc considers "system". We override those names in the mapping file.
build.gradle
https://github.com/doppllib/core-doppl/blob/master/androidbase/build.gradle#L19
mapping file
https://github.com/doppllib/core-doppl/blob/master/androidbase/src/main/java/androidbase.mappings
I screwed up.
In my dopplConfig, I have:
translatePattern {
include '**/api/**'
include '**/arch/**'
include '**/RepositoryTest.java'
}
In this case, **/arch/** not only matches my arch package, but also the arch package from the Architecture Components.
Ordinarily, this would not matter, because the Architecture Components source code is not in my project. But, R.java gets generated, due to resources, and the translatePattern includes generated source code in addition to lovingly hand-crafted source code. So, that's where my extraneous Objective-C was coming from.
Many thanks to Kevin Galligan for his assistance with this, out on the #newbiehelp Doppl Slack channel!
The ~/.cabal/config stores configuration which cabal-install uses. I wanted to do some hackery on it. (Specifically, having multiple GHC versions installed, I wish to have separate documentation indexes).
I couldn't, however, find any documentation about its' syntax or variables except for what is included in default file. Is there any documentation available?
Edit: I've stated the goal above, but let me add some details: If the same package (eg. GTK) is installed in two versions of GHC they end up in the same documentation index file. I wan't that local documentation index to be separate for each GHC installation. I believe it is possible in some way using documentation directory setting, but there has to be a variable for currently used GHC version. If there isn't one there might be some workarounds available, but I won't be able to say that unless I see the documentation.
This seems to work, although I've only tested it with one version of GHC:
documentation: True
doc-index-file: $datadir/doc/$compiler/index.html
install-dirs user
docdir: $datadir/doc/$compiler/$pkgid
With the other options left at the default, this generates documentation in .cabal/share/doc/<ghc-version>/<package-name>, and the index in .cabal/share/doc/<ghc-version>/index.html.
There appears to be very little online - not even the haddocks for the cabal-install code. So your best bet may be to puzzle it out from the source. cabal unpack cabal-install, or view the cabal-install repo online. Look at SavedConfig in Distribution/Client/Config.hs. As an example, it imports GlobalFlags from Setup.hs; the individual flags, eg globalCacheDir, are associated with their config-file syntax (which is also the command-line syntax) in the globalCommand function below, remote-repo-cache in this case.
You should also ask dcoutts in the #haskell channel on irc.freenode.net, in case he has new docs available.
Today i decided to see up Groovy source code and to built up my programming muscles in Groovy. I downloaded the Groovy Source code 1.8 from this link. But how do i proceed? In sense which folder first i have to see, so that i can understand better how groovy works(because there are many folders like benchmarks,bootstraps, src etc). May be this seems to be stupid question but i wanna to ask it.
Correct me if am worng.
The source code is inside src/main.
The unit tests all live inside src/test.
I found a good place to start looking was inside the huge class:
src/main/org/codehaus/groovy/runtime/DefaultGroovyMethods.java
This is where a lot of the extra Groovy methods are defined, so you can pick your favourite function (such as String.capitalize for example) and find the definition of that method (around line 9561, but that might be different in the version of the code you have downloaded)
You should then be able to (for example) change how something works, and check that the unit tests still function by calling
ant test
from the root folder, then you should see it build and test reports should be created and placed in the target folder
I tend to use a combination of find and grep to locate the area in the source that I am interested in, then slowly expand out from that class as I find other things that relate to it...
Hope this helps...it's a bit of a big question to try and cover
I'm trying to programmatically find the full path of a jar file while it's running. I know there are a number of other questions about this, but none of them seem to work for me - most notably, I've stumbled across
MyClass.class.getProtectionDomain().getCodeSource().getLocation().toURI().getPath()
a number of times. That particular method works for me when debugging in Eclipse, but once I compile to a jar, it returns a NullPointerException. Other methods have met similar problems after compiling.
I have a temporary workaround by using java.class.path, but that only returns the full path when I execute the jar from the GUI - in the terminal, it fails.
I should also note that the only system that I'm having this problem on is Linux. On Windows and Mac, I have no troubles.
Any help would be appreciated :)
Thanks!
Derek
EDIT: The jar is executable, if that changes anything.
You can't do it. There is no requirement for ClassLoaders to support this, and most don't.
Or, perhaps this formulation would be more helpful. Binary classes come into the JVM via ClassLoader objects. ClassLoader objects are not required to keep any track of the provenance of the classes they load. And they can load them from anywhere: a jar, over the web, a database, an old tin can.
So, if you want to always know the provenance of classes in your application, you have to always load code with a class loader that, indeed, does track provenance in a manner useful to you.
If you control the entire application, you can do that.
If you don't control the entire application, and are rather talking about an arbitrary jar loaded into an arbitrary class loader in an arbitrary app, you can't depend on learning its location.
The following works for me even when running from a jar file:
URL url = this.getClass().getProtectionDomain().getCodeSource().getLocation();
String p = URLDecoder.decode(url.getFile(), "UTF-8");
File jarFile = new File(p);
Sending the path through the URLDecoder is important because otherwise a pathname with %20 in it will be created if the directory contains spaces.
Is there a kind of "include" directive in RPM spec? I couldn't find an answer by googling.
Motivation: I have a RPM spec template which the build process modifies with the version, revision and other build-specific data. This is done by sed currently. I think it would be cleaner if the spec would #include a build-specific definitions file, which would be generated by the build process, so I don't need to search and replace in the spec.
If there is no include, is there an idiomatic way to do this (quite common, I believe) task?
Sufficiently recent versions of rpmbuild certainly do support %include:
%include common.inc
Unfortunately, they aren't very smart about it -- there is no known set of directories, in which it will look for the requested files, for example. But it is there and variables are expanded, for example:
%include %{_topdir}/Common/common.inc
RPM does not support includes.
I have solved similar problems with either m4 macro processor or by just concatenating parts of spec (when the "include" was at the beginning).
If you only need to pass a few variables at build time, and not include several lines from another file, you can run
rpmbuild --define 'myvar SOMEVALUE' -bb myspec.spec
and you can use %myvar in the spec.
I faced this same issue recently. I wanted to define multiple sub-packages that were similar, but each varied just slightly (they were language-specific RPMs). I didn't want to repeat the same boiler-plate stuff for each sub-package.
Here's a generic version of what I did:
%define foo_spec() %{expand:%(cat '%{myloc}/main-foo.spec')}
%{foo_spec bar}
%{foo_spec baz}
%{foo_spec qux}
The use of %{expand} ensures that %(cat) is only executed a single time, when the macro is defined. The content of the main-foo.spec file is then three times, and each time %1 in the main-foo.spec file expands to each of bar, baz and qux, in turn, allowing me to treat it as a template. You could easily expand this to more than one parameter, if you have the need (I did not).
For the underlying issue, there maybe two additional solutions that are present in all rpm versions that I am aware of.
Subpackages
macro and rpmrc files.
Subpackages
Another alternative (and perhaps the "RPM way") is to use sub-packages. Maximum RPM also has information and examples of subpackages.
I think the question is trying to structure something like,
two spec files; say rpm_debug.spec and rpm_production.spec
both use %include common.spec
debug and production could also be client and server, etc. For the examples of redefining a variable, each subpackage can have it's own list of variables.
Limitations
The main advantage of subpackages is that only one build takes place; This may also be a disadvantage. The debug and production example may highlight this. That can be worked around using strip to create variants or compiling twice with different output; perhaps using VPATH with Gnu Make). Having to compile large packages and then only have simple variations, like with/without developer info, like headers, static libraries, etc. can make you appreciate this approach.
Macros and Rpmrc
Subpackages don't solve the problem of structural defines that you wish for an entire rootfs hierarchy, or larger collection of RPMs. We have rpmbuild --showrc for this. You can have a large amount of variables and macros defined by altering rpmrc and macros when you run rpm and rpmbuild. From the man page,
rpmrc Configuration
/usr/lib/rpm/rpmrc
/usr/lib/rpm/redhat/rpmrc
/etc/rpmrc
~/.rpmrc
Macro Configuration
/usr/lib/rpm/macros
/usr/lib/rpm/redhat/macros
/etc/rpm/macros
~/.rpmmacros
I think these two features can solve all the problems that %include can. However, %include is a familiar concept and was probably added to make rpm more full-featured and developer friendly.
Which version are you talking about? I currently have %include filename.txt in my spec file and it seems to work just like the C #include directive.
> rpmbuild --version
RPM version 4.8.1
You can include the *.inc files from the SOURCES directory (%_sourcedir):
Source1: common.inc
%include %{SOURCE1}
In this way they will go automatically into SRPMS.
I've used scripts (name your favorite) to take a template and create the spec file from that. Also, the %files tag can import a file that is created by another process, e.g. Python's bdist-rpm.