Less language is an extension of css and less4j compiles it into regular css. Less adds several dynamic features into css: variables, expressions, nested rules, and so on. Less was designed to be compatible with css and any correct css file is also correct less file.
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building less4j 1.17.2
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- antlr3-maven-plugin:3.5.2:antlr (run antlr) @ less4j ---
[INFO] ANTLR: Processing source directory ~/rpmbuild/BUILD/less4j-less4j-1.17.2/src/main/antlr3
ANTLR Parser Generator Version 3.5.2
Output file ~/rpmbuild/BUILD/less4j-less4j-1.17.2/target/generated-sources/antlr3/com/github/sommeri/less4j/core/parser/LessParser.java does not exist: must build ~/rpmbuild/BUILD/less4j-less4j-1.17.2/src/main/antlr3/com/github/sommeri/less4j/core/parser/Less.g
com/github/sommeri/less4j/core/parser/Less.g
warning(200): com/github/sommeri/less4j/core/parser/Less.g:1531:19:
Decision can match input such as "{NEW_LINE, WS}" using multiple alternatives: 1, 2
As a result, alternative(s) 2 were disabled for that input
warning(200): com/github/sommeri/less4j/core/parser/Less.g:1532:29:
Decision can match input such as "{NEW_LINE, WS}" using multiple alternatives: 1, 2
As a result, alternative(s) 2 were disabled for that input
[INFO]
[INFO] --- build-helper-maven-plugin:1.9.1:add-source (add-source) @ less4j ---
[INFO] Source directory: ~/rpmbuild/BUILD/less4j-less4j-1.17.2/target/generated-sources/antlr3 added.
[INFO]
[INFO] --- maven-resources-plugin:2.7:resources (default-resources) @ less4j ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO] Copying 2 resources
[INFO]
[INFO] --- maven-compiler-plugin:3.3:compile (default-compile) @ less4j ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 292 source files to ~/rpmbuild/BUILD/less4j-less4j-1.17.2/target/classes
The system is out of resources.
Consult the following stack trace for details.
java.lang.OutOfMemoryError: Java heap space
at java.nio.HeapCharBuffer.<init>(HeapCharBuffer.java:57)
at java.nio.CharBuffer.allocate(CharBuffer.java:335)
at com.sun.tools.javac.util.BaseFileManager.decode(BaseFileManager.java:221)
at com.sun.tools.javac.file.RegularFileObject.getCharContent(RegularFileObject.java:117)
at com.sun.tools.javac.file.RegularFileObject.getCharContent(RegularFileObject.java:53)
at com.sun.tools.javac.main.JavaCompiler.readSource(JavaCompiler.java:602)
at com.sun.tools.javac.main.JavaCompiler.parse(JavaCompiler.java:665)
at com.sun.tools.javac.main.JavaCompiler.parseFiles(JavaCompiler.java:950)
at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:857)
at com.sun.tools.javac.main.Main.compile(Main.java:523)
at com.sun.tools.javac.api.JavacTaskImpl.doCall(JavacTaskImpl.java:129)
at com.sun.tools.javac.api.JavacTaskImpl.call(JavacTaskImpl.java:138)
at org.codehaus.plexus.compiler.javac.JavaxToolsCompiler.compileInProcess(JavaxToolsCompiler.java:125)
at org.codehaus.plexus.compiler.javac.JavacCompiler.performCompile(JavacCompiler.java:170)
at org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute(AbstractCompilerMojo.java:825)
at org.apache.maven.plugin.compiler.CompilerMojo.execute(CompilerMojo.java:129)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:862)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:286)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:197)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] An unknown compilation problem occurred
[INFO] 1 error
hi i get:
any ideas? thanks in advance
Environment:
pache Maven 3.3.3 (NON-CANONICAL_2015-07-10T12:37:52_mockbuild; 2015-07-10T14:37:52+02:00) Maven home: /usr/share/maven Java version: 1.8.0_92, vendor: Oracle Corporation Java home: /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.92-4.b14.fc23.i386/jre Default locale: it_IT, platform encoding: UTF-8 OS name: "linux", version: "4.5.7-202.fc23.i686", arch: "i386", family: "unix"