Hi allI've found XTend (http://xtend-lang.org) and it really sounds great! But, I can't see any standalone command line compiler for this language. It seems only to run under eclipse. I've done some research, and found some people saying, that it has a command line compiler, but I can't find a download link.
Does the compiler exist, standalone, or do you need eclipse to use it?
Regards
It is not documented, but there is indeed a command line compiler in the Xtend code base - the same one used by the Maven plug-in (that is documented in the Xtend homepage).
If Maven plug-in does not work for you, then you could download the standalone jar version directly from the Maven repository at http://build.eclipse.org/common/xtend/maven/org/eclipse/xtend/org.eclipse.xtend.standalone/2.3.1/ (for version 2.3.1), and execute the org.eclipse.xtend.core.compiler.batch.Main class from it.
This class executes the xtend compiler, and usage information can be displayed (also readable from the source file).
You can use the xtend standalone compiler. For my case I copied the following .jar files to a folder named xtendc:
com.google.guava_21.0.0.v20170206-1425.jar
com.google.inject_3.0.0.v201312141243.jar
javax.inject_1.0.0.v20091030.jar
org.antlr.runtime_3.2.0.v201101311130.jar
org.apache.log4j_1.2.15.v201012070815.jar
org.eclipse.emf.common_2.15.0.v20180914-1817.jar
org.eclipse.emf.ecore.xmi_2.15.0.v20180706-1146.jar
org.eclipse.emf.ecore_2.16.0.v20181124-0637.jar
org.eclipse.equinox.common_3.10.200.v20181021-1645.jar
org.eclipse.jdt.core_3.16.0.v20181130-1748.jar
org.eclipse.xtend.core_2.16.0.v20181203-1347.jar
org.eclipse.xtend.lib.macro_2.16.0.v20181203-0507.jar
org.eclipse.xtext.common.types_2.16.0.v20181203-0528.jar
org.eclipse.xtext.util_2.16.0.v20181203-0514.jar
org.eclipse.xtext.xbase.lib_2.16.0.v20181203-0507.jar
org.eclipse.xtext.xbase_2.16.0.v20181203-0528.jar
org.eclipse.xtext_2.16.0.v20181203-0514.jar
org.objectweb.asm_7.0.0.v20181030-2244.jar
And then, in that folder I executed the CLI main class of the batch compiler:
java -cp "*" org.eclipse.xtend.core.compiler.batch.Main -d <path-to-xtend-gen-folder> -useCurrentClassLoader <path-to-src-folder>
CLI usage of main class is documented to be as following:
Usage: Main <options> <source directories>
where possible options include:
-d <directory> Specify where to place generated xtend files
-tp <path> Temp directory to hold generated stubs and classes
-cp <path> Specify where to find user class files
-encoding <encoding> Specify character encoding used by source files
-javaSourceVersion <version> Create Java Source compatible to this version. Can be: 1.5, 1.6, 1.7, 1.8, 9, 10
-noSuppressWarningsAnnotation Don't put #SuppressWarnings() into generated Java Code
-generateGeneratedAnnotation Put #Generated into generated Java Code
-includeDateInGeneratedAnnnotation If -generateGeneratedAnnotation is used, add the current date/time.
-generateAnnotationComment <string> If -generateGeneratedAnnotation is used, add a comment.
-useCurrentClassLoader Use current classloader as parent classloader
-writeTraceFiles Write Trace-Files
so you will need to pass your classpath there.
Related
I have a GWT application (FooGwtApp) and a library module (FooLib) used as a dependency in FooGwtApp. The package structure of FooLib looks like this:
packageFoo.ImportantClass
packageFoo.UnimportantClass
packageBar.OtherClass
I want ImportantClass (and only ImportantClass) to be compiled to JS by the GWT compiler. Moving ImportantClass to another package is not an option.
I created ImportantClass.gwt.xml within packageFoo with the following content:
<module>
<inherits name="com.google.gwt.user.User"/>
<source path="" includes="**/ImportantClass*"/>
</module>
Next I put an inherited reference to the ImportantClass module definition in FooGwtApp.gwt.xml (this seems to work: the IDE recognizes it, and is able to parse the reference to ImportantClass.gwt.xml).
Now If I put references to ImportantClass into FooGwtApp's client code, the GWT compiler fails, because it does not find ImportantClass on the source path:
No source code is available for type packageFoo.ImportantClass; did you forget to inherit a required module?
I likely messed up sommething in the source path / includes attribute in ImportantClass.gwt.xml - either defining the current package as root package with path="" is not a valid notation or something's wrong with the includes attribute. Or both. Or neither.
Can you give me a clue about where it all went wrong?
It turns out the problem was not in ImportantClass.gwt.xml, but in other Maven related stuff:
ImportantClass.gwt.xml should be placed under src/main/resources/packageFoo, not src/main/java/packageFoo, otherwise it won't be packaged into the binary jar.
GWT compiler compiles from Java source to Javascript source. This means we don't just need ImportantClass.class in FooLib.jar, but also its source. Best solution for this is to use maven-source-plugin in FooLib's pom.xml and also to import the FooLib dependency into FooGwtApp with sources classifier.
On the latter topic, see the following SO answers:
Maven: Distribute source code with with jar-with-dependencies
How to properly include Java sources in Maven?
After fixing the above problems, the source path declaration present in the question works.
I am using antlr4.3 (complete) jar.
It has many duplicates in org.antlr.runtime and org.antlr.v4.runtime packages.
In code when I explicitly use 'v4.runtime' - at runtime, classpath picks up 'runtime'.
So I extracted the jar and recreated it without org.antlr.runtime.
But apparently some classes like RecognitionException is now not found.
How should I resolve this other than:
Exploding the latest Jar and specifying org.antlr.v4.runtime BEFORE org.antlr.runtime so that a duplicate class will be picked up from v4.runtime, and if there isn't one in it, it will look at org.antlr.runtime...??
To add to the above, here's the code snippet which gives a problem: the jars are in the classpath.
import org.antlr.v4.runtime.CharStream;
import org.antlr.v4.runtime.ANTLRInputStream;
public class AntlrMain {
public static void main(String[] args) {
System.out.println("Start Hello World");
try {
InputStream is = new FileInputStream(
"/home/ecworkspace/antlrCentral/DSL/mydev.dsl");
org.antlr.runANTLRInputStream input = new ANTLRInputStream(is);
org.antlr.v4.runtime.CharStream cs = (org.antlr.v4.runtime.CharStream) input;
VCFGLexer lexer = new VCFGLexer(cs);
Initially in the ANtlrMain class, I wasn't using explicit
org.antlr.v4.runtime.; but that failed at runtime, with 'CharStream not found'.
Then I changed to include full path of the class
Then changed the ANTLR4 Jar to 'exclude' org.antlr.runtime (it has org.antlr.v4.runtime). That's when the 'RecognitionException not found' error occurred.
The grammar by the way, compiles OK, generating all my VCFG*.java and tokens classes, where VCFG is the grammar name.
UPDATE 1
Keeping in line with suggestions from all - I removed my answer to my own questions and adding it to this original questions.
In antlr-4.2-complete.jar, I see:
/tmp/x/ $ jar -xf antlr-4.2-complete.jar
/tmp/x/ $ ls org/antlr
runtime stringtemplate v4
/tmp/x/ $ ls org/antlr/v4
analysis codegen parse semantics Tool$1UndefChecker.class Tool$OptionArgType.class
automata misc runtime tool Tool.class Tool$Option.class
/tmp/x/ $ ## The 2 runtimes above: org.antlr.runtime and org.antlr.v4.runtime
/tmp/x/ $ ## which to use where, along with same-name classes in
/tmp/x/ $ ## org.antlr and org.antlr.v4
So, in build.xml, I use above jar to:
`
java -jar antlr-4.2-complete grammar.g4 => compiles and gives me
VCFG*.java and VCFG*.tokens
javac -cp "antlr-4.2-complete-jar" VCFG*.java => Succeeds. I have
the VCFG*.class collection.
Then I compile my code AntlrMain.java (which uses AntlrInputStream
etc.), again with the above antlr jar and some 3rd-party Jars
(logging, commons) => successfully.
Finally the RUN of java -cp "antlr-4.2-complete.jar:log4j.jar" -jar
myJar => FAILS on 'CharStream' not found.
UPDATE 2
Adding, based on your response.
I have only recently started posting questions on Stackoverflow. So pointers about whether to respond to my question to provide more info, or to comment to a reply etc. are welcome.
-cp <3rd-party> is -cp "log4j.jar:commonsLang.jar".
By -cp "above-jar" I meant -cp "antlr-4.2-complete.jar.
And if I have not mentioned it, it is an oversight - I have, for every 'java' and 'javac commands, included antlr-4.2-complete.jar.
BUT I see you indicating antlr-runtime-4.2.jar. So there ARE separate antlr-runtime jar and antlr-complete jars.
In the 4 steps below (I am leaving out -cp for convenience, but am including antlr-4.2-complete.jar for 'every' step.
I believe, I should be using the antlr-run-time and antlr-complete jars at different steps:
1 (java MyGrammar.java)
2 (javac MyGrammar*.java)
3. javac MyOwnCode.java
4. Run myCode (java MyCode) ...
which of the two antlr JARs (runtime and complete; and their versions) should I then use, at each of the above 4 steps?
The jar file does not contain duplicate classes. The code generation portion of the ANTLR 4.3 Tool relies on the ANTLR 3.5.2 Runtime library, which is included in the "complete" jar file. While some of the classes have the same name as classes in ANTLR 4, they are not duplicates and cannot be used interchangeably.
#280Z28 / Sam:
I am mortified, but have to admit the simplest answer is most often the correct.
I spent time fleshing out the JAR, making multiple JAR files out of it, include one for compile, one for run and on and on.
The answer is succinctly explain in the ANT build.xml code snippet below: where I produce the 'final' production JAR file, which is the only JAR then included while executing my Main program:
<jar destfile="${p_productionJar}">
<fileset dir="${p_buildDir}" casesensitive="yes">
<include name="**/*.class"/>
</fileset>
<zipfileset includes="**/*.class" src="${p_genCodeJar}"/>
<!-- How did I miss including p_antlrJar earlier?? -->
<zipfileset includes="**/*.class" src="${p_antlrJar}"/>
<zipfileset includes="**/*.class" src="${p_jschJar}"/>
<zipfileset includes="**/*.class" src="${p_log4jJar}"/>
<zipfileset includes="**/*.class" src="${p_commonslangJar}"/>
<manifest>
<attribute name="Main-Class" value="AntlrMain"/>
.....
The production Jar was missing ${p_antlrJar} => which is antlr-4.3-complete.jar!!!!
You did mention this in your answer... but it was a pretty silly mistake to do, and didn't think I had done it...
Thank you.
orig post:
Hello List,
I am new to Java, Netbeans, and the IB Java API.
I downloaded the IB Java API software and I am using Netbeans to look at it.
On one of the files, Netbeans is indicating a problem with the file.
At the very top of the file, the author has placed a package declaration:
package samples.rfq;
Netbeans is using a red-dot to the left of the package declaration to tell me that it has a problem with the package declaration.
When I mouse-hover the package declaration, Netbeans tells me this:
Incorrect Package (Alt-Enter shows hints)
On my Mac-keyboard I press Alt-Enter and Netbeans just interprets that as an Enter (and then I need to undo that Enter).
I have 2 questions:
How do I work around the Alt-Enter-bug to see the hints?
What do you typically do when Netbeans indicates 'Incorrect Package' on one of your package declarations?
My comment to Josefx:
josefx,
I think maybe you gave me a good clue.
I looked at the file and I see it here in the (Linux) file system:
a#z2:/pt/z2/api$
a#z2:/pt/z2/api$ ls -la /pt/z2/api/samples/rfq/SampleRfq.java
-rw-r--r-- 1 a a 14475 2008-08-13 15:49 /pt/z2/api/samples/rfq/SampleRfq.java
a#z2:/pt/z2/api$
a#z2:/pt/z2/api$
a#z2:/pt/z2/api$
a#z2:/pt/z2/api$ grep package /pt/z2/api/samples/rfq/SampleRfq.java
package samples.rfq;
a#z2:/pt/z2/api$
So obviously it is in a directory which matches its package declaration.
I tried running javac against the file from a variety of directories.
This works:
cd /pt/z2/api/
javac samples/rfq/SampleRfq.java
If I run javac from any other directory it fails.
So, I see a dependency between 3 things here:
Location of the SampleRfq.java
Syntax in the package declaration
Location of the javac command
Since I got javac to work, I'm convinced of 2 things:
SampleRfq.java is in the correct directory
Syntax in the package declaration is correct
So, it looks like my issue is with Netbeans.
Netbeans is too ... 'stupid' to know that:
SampleRfq.java is in the correct directory
Syntax in the package declaration is correct
How do I help Netbeans?
I posted a question to the Netbeans mail-list and the only answer I got was: "Fix the incorrect file name".
ok,
I got the error to evaporate.
steps:
abandon my netbeans project
rsync my code to a new directory; create new NB project; (NB will not let me use old code)
right-click-project: select properties
Add folder
Pick the parent of the directory corresponding to the package
Netbeans now "knows" that the package declaration matches the directory structure.
I have different behaviour of compiler, when building project from IDE and from command-line, which I can not explain.
The detailed issue's description is rather big, but it's really simple.
I have a C++ Builder project, which has a PAS-file included (IncludeUnits.pas). This pas-file has several units and inc-files listed. These files are located in separate folders and these folders are listed in library&include paths in project's options.
Folders layout:
C:\Demo\Bin
C:\Demo\Project
C:\Demo\Project\CBuilder5
C:\Demo\Project\Common
C:\Demo\Source
C:\Demo\Source\Common
Bin is output folder, Project/CBuilder5 holds project (bpr-file), Project/Common holds included pas-file (IncludeUnits.pas), Source and Source/Common hold other files (pas&inc). I think that it's pretty usual layout.
C:\Demo\Project\Common\ IncludeUnits.pas :
unit IncludeUnits;
interface
uses
Test;
implementation
end.
C:\Demo\Source\ Test.pas :
unit Test;
interface
{$I Test.inc}
implementation
end.
C:\Demo\Source\Common\ Test.inc :
// this file is empty
If I compile this project from C++ Builder IDE - it will compile fine. C++ Builder IDE doesn't have any additional paths in IDE settings set.
Now, I want to compile it from command-line. First, I issue
bpr2mak.exe MyProject.bpr
command.
This command creates MyProject.mak file, where I can see all paths ("....\Source" and "....\Source\Common" are the paths in question):
...
INCLUDEPATH = $(BCB)\include;$(BCB)\include\vcl;..\Common;..\..\Source;..\..\Source\Common
LIBPATH = $(BCB)\lib\obj;$(BCB)\lib;..\Common;..\..\Source;..\..\Source\Common
...
Now, I run make command:
make.exe -B -f"MyProject.mak"
It gives me the following output:
C:\PROGRA~1\Borland\CBUILD~2\BIN\dcc32 -N2....\Bin -N0....\Bin -$Y+ -$W -$R -v -JPHNE -M -UC:\PROGRA~1\Borland\CBUILD~2\bin..\include;C:\PROGRA~1\Borland\CBUILD~2\bin..\include\vcl;..\Common;..\..\Source;..\..\Source\Common -D_DEBUG;_RTLDLL;NO_STRICT -OC:\PROGRA~1\Borland\CBUILD~2\bin..\include;C:\PROGRA~1\Borland\CBUILD~2\bin..\include\vcl;..\Common;..\..\Source;..\..\Source\Common --BCB ..\Common\IncludeUnits.PAS
Borland Delphi Version 13.0 Copyright (c) 1983,99 Inprise Corporation
C:\Demo\Project\Common\IncludeUnits.pas(1) C:\Demo\Project\Common\IncludeUnits.pas(1) C:\Demo\Project\Common\IncludeUnits.pas(1) C:\Demo\Project\Common\IncludeUnits.pas(6) C:\Demo\Source\Test.pas(1) C:\Demo\Source\Test.pas(5) Fatal: File not found: 'Test.inc'
As you can see - all search path is passed to compiler and the file (Test.inc) is all here - in that Source\Common folder. But still compiler can't find it?
Of course, I run both commands from folder with bpr-file. And changing paths to absolute doesn't help.
Copying Test.inc from Source\Common to Source will help. Changing {$I Test.inc} to {$I Common\Test.inc} will also help.
Why? It seems that I'm missing something. Remember: project have no problems with compiling from IDE, Test.inc is found without copying or changing declaration. Did I miss some switch to make or dcc32?
I found the reason: command line for dcc32 misses -I switch, which specifies paths for include files.
For some reason, bpr2mak doesn't respect this option. Fortunately, it allows you to specify alternate template for conversion bpr -> mak. I edited default template and added "-I" option to it, pass new template to bpr2mak - and it worked.
This is with Flexbuilder 3.2, Eclipse 3.3.2.
I am moving my development environment to a new machine. Actionscript classes that compiled in the old environment now get a compile error:
A file found in a source-path must have an externally visible definition. If a definition in the file is meant to be externally visible, please put the definition in a package.
I do declare the package in these classes - I think failure to declare the package is the usual reason for this error.
To add to the mystery, many classes in this project compile without errors.
What should I check to diagnose this?
Problem solved - I had missed out some items in the path in the environment where I was launching Eclipse.
"C:\Program Files\Adobe\Flex Builder 3 Plug-in\sdks\3.2.0"\bin
"C:\Program Files\Adobe\Flex Builder 3 Plug-in\sdks\3.2.0"\frameworks
"C:\Program Files\Adobe\Flex Builder 3 Plug-in\jre"\bin
"C:\Program Files\Adobe\Flex Builder 3 Plug-in\jre"\lib
I'm amazed anything at all worked with this much missing from my path.