# Building ANTLR Most programmers do not need the information on this page because they will simply download the appropriate jar(s) or use ANTLR through maven (via ANTLR's antlr4-maven-plugin). If you would like to fork the project and fix bugs or tweak the runtime code generation, then you will almost certainly need to build ANTLR itself. There are two components: 1. the tool that compiles grammars down into parsers and lexers in one of the target languages 1. the runtime used by those generated parsers and lexers. I will assume that the root directory is `/tmp` for the purposes of explaining how to build ANTLR in this document. *As of 4.6, ANTLR tool and Java-target runtime requires Java 7.* # Get the source The first step is to get the Java source code from the ANTLR 4 repository at github. You can download the repository from github, but the easiest thing to do is simply clone the repository on your local disk: ```bash $ cd /tmp /tmp $ git clone https://github.com/antlr/antlr4.git Cloning into 'antlr4'... remote: Counting objects: 61480, done. remote: Total 61480 (delta 0), reused 0 (delta 0), pack-reused 61480 Receiving objects: 100% (61480/61480), 31.24 MiB | 7.18 MiB/s, done. Resolving deltas: 100% (32970/32970), done. Checking connectivity... done. Checking out files: 100% (1427/1427), done. ``` # Compile ```bash $ cd /tmp $ git clone git@github.com:antlr/antlr4.git Cloning into 'antlr4'... remote: Counting objects: 59858, done. remote: Compressing objects: 100% (57/57), done. remote: Total 59858 (delta 28), reused 9 (delta 9), pack-reused 59786 Receiving objects: 100% (59858/59858), 31.10 MiB | 819.00 KiB/s, done. Resolving deltas: 100% (31898/31898), done. Checking connectivity... done. $ cd antlr4 $ mvn -DskipTests install ... [INFO] ------------------------------------------------------------------------ [INFO] Reactor Summary: [INFO] [INFO] ANTLR 4 ............................................ SUCCESS [ 0.287 s] [INFO] ANTLR 4 Runtime .................................... SUCCESS [ 4.915 s] [INFO] ANTLR 4 Tool ....................................... SUCCESS [ 1.315 s] [INFO] ANTLR 4 Maven plugin ............................... SUCCESS [ 2.393 s] [INFO] ANTLR 4 Runtime Test Annotations ................... SUCCESS [ 0.078 s] [INFO] ANTLR 4 Runtime Test Processors .................... SUCCESS [ 0.019 s] [INFO] ANTLR 4 Runtime Tests (2nd generation) ............. SUCCESS [ 1.986 s] [INFO] ANTLR 4 Tool Tests ................................. SUCCESS [ 0.513 s] [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 12.005 s [INFO] Finished at: 2016-11-21T11:42:42-08:00 [INFO] Final Memory: 52M/434M [INFO] ------------------------------------------------------------------------ ``` We do `install` not `compile` as tool tests and such refer to modules that must be pulled from the maven install local cache. # Installing libs to mvn cache locally To skip the tests (which require all the target languages be installed) and **install into local repository** `~/.m2/repository/org/antlr`, do this: ```bash $ mvn install -DskipTests=true # make sure all artifacts are visible on this machine ``` # Testing tool and targets In order to perform the tests on all target languages, you need to have the following languages installed: * `mono` (e.g., `brew install mono`) * `nodejs` * Python 2.7 * Python 3.5 * Go * Swift 3 (via XCode 8.x) tested currently only osx * clang (for C++ target) To run the tests and **install into local repository** `~/.m2/repository/org/antlr`, do this: ```bash $ mvn install -DskipTests=true # make sure all artifacts are visible on this machine $ mvn install # now "do it with feeling" ... ------------------------------------------------------- T E S T S ------------------------------------------------------- Running org.antlr.v4.test.runtime.csharp.TestCompositeLexers dir /var/folders/s1/h3qgww1x0ks3pb30l8t1wgd80000gn/T/TestCompositeLexers-1446068612451 Starting build /usr/bin/xbuild /p:Configuration=Release /var/folders/s1/h3qgww1x0ks3pb30l8t1wgd80000gn/T/TestCompositeLexers-1446068612451/Antlr4.Test.mono.csproj dir /var/folders/s1/h3qgww1x0ks3pb30l8t1wgd80000gn/T/TestCompositeLexers-1446068615081 Starting build /usr/bin/xbuild /p:Configuration=Release /var/folders/s1/h3qgww1x0ks3pb30l8t1wgd80000gn/T/TestCompositeLexers-1446068615081/Antlr4.Test.mono.csproj Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 3.451 sec Running org.antlr.v4.test.runtime.csharp.TestCompositeParsers dir /var/folders/s1/h3qgww1x0ks3pb30l8t1wgd80000gn/T/TestCompositeParsers-1446068615864 antlr reports warnings from [-visitor, -Dlanguage=CSharp, -o, /var/folders/s1/h3qgww1x0ks3pb30l8t1wgd80000gn/T/TestCompositeParsers-1446068615864, -lib, /var/folders/s1/h3qgww1x0ks3pb30l8t1wgd80000gn/T/TestCompositeParsers-1446068615864, -encoding, UTF-8, /var/folders/s1/h3qgww1x0ks3pb30l8t1wgd80000gn/T/TestCompositeParsers-1446068615864/M.g4] ... [INFO] ------------------------------------------------------------------------ [INFO] Reactor Summary: [INFO] [INFO] ANTLR 4 ............................................ SUCCESS [ 0.445 s] [INFO] ANTLR 4 Runtime .................................... SUCCESS [ 3.392 s] [INFO] ANTLR 4 Tool ....................................... SUCCESS [ 1.373 s] [INFO] ANTLR 4 Maven plugin ............................... SUCCESS [ 1.519 s] [INFO] ANTLR 4 Runtime Test Annotations ................... SUCCESS [ 0.086 s] [INFO] ANTLR 4 Runtime Test Processors .................... SUCCESS [ 0.014 s] [INFO] ANTLR 4 Runtime Tests (2nd generation) ............. SUCCESS [06:39 min] [INFO] ANTLR 4 Tool Tests ................................. SUCCESS [ 6.922 s] [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 06:53 min [INFO] Finished at: 2016-11-16T15:36:56-08:00 [INFO] Final Memory: 44M/458M [INFO] ------------------------------------------------------------------------ ``` Note: That is actually result of running the much faster: `mvn -Dparallel=methods -DthreadCount=4 install` You should see these jars (when building 4.6-SNAPSHOT): ```bash /Users/parrt/.m2/repository/org/antlr $ find antlr4* -name '*.jar' antlr4-maven-plugin/4.6-SNAPSHOT/antlr4-maven-plugin-4.6-SNAPSHOT.jar antlr4-runtime-test-annotation-processors/4.6-SNAPSHOT/antlr4-runtime-test-annotation-processors-4.6-SNAPSHOT.jar antlr4-runtime-test-annotations/4.6-SNAPSHOT/antlr4-runtime-test-annotations-4.6-SNAPSHOT.jar antlr4-runtime-testsuite/4.6-SNAPSHOT/antlr4-runtime-testsuite-4.6-SNAPSHOT-tests.jar antlr4-runtime-testsuite/4.6-SNAPSHOT/antlr4-runtime-testsuite-4.6-SNAPSHOT.jar antlr4-runtime/4.6-SNAPSHOT/antlr4-runtime-4.6-SNAPSHOT.jar antlr4-tool-testsuite/4.6-SNAPSHOT/antlr4-tool-testsuite-4.6-SNAPSHOT.jar antlr4/4.6-SNAPSHOT/antlr4-4.6-SNAPSHOT-tests.jar antlr4/4.6-SNAPSHOT/antlr4-4.6-SNAPSHOT.jar ``` Note that ANTLR is written in itself, which is why maven downloads antlr4-4.5.jar for boostrapping 4.6-SNAPSHOT purposes. ## Running test subsets *From the `runtime-testsuite` dir* ### Run one test group across targets ```bash $ cd runtime-testsuite $ mvn -Dtest=TestParserExec test ------------------------------------------------------- T E S T S ------------------------------------------------------- Running org.antlr.v4.test.runtime.cpp.TestParserExec ... Tests run: 32, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 114.283 sec Running org.antlr.v4.test.runtime.csharp.TestParserExec ... ``` Or run all lexer related tests: ``` $ mvn -Dtest=Test*Lexer* test ------------------------------------------------------- T E S T S ------------------------------------------------------- Running org.antlr.v4.test.runtime.cpp.TestCompositeLexers ... ``` ### Run all tests for a single target ```bash $ mvn -Dtest=java.* test ... ``` Or run all lexer related tests in Java target only: ```bash $ mvn -Dtest=java.*Lexer* test ... ------------------------------------------------------- T E S T S ------------------------------------------------------- Running org.antlr.v4.test.runtime.java.TestCompositeLexers Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.277 sec Running org.antlr.v4.test.runtime.java.TestLexerErrors Tests run: 12, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 2.376 sec Running org.antlr.v4.test.runtime.java.TestLexerExec Tests run: 38, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 10.07 sec Running org.antlr.v4.test.runtime.java.TestSemPredEvalLexer Tests run: 7, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.255 sec Results : Tests run: 59, Failures: 0, Errors: 0, Skipped: 0 ``` ## Testing in parallel Use this to run tests in parallel: ```bash $ mvn -Dparallel=methods -DthreadCount=4 test ... ------------------------------------------------------- T E S T S ------------------------------------------------------- Concurrency config is parallel='methods', perCoreThreadCount=true, threadCount=4, useUnlimitedThreads=false ... ``` This can be combined with other `-D` above. ## Building without testing To build without running the tests (saves a lot of time), do this: ```bash mvn -DskipTests install ``` ## Building ANTLR in Intellij IDE After download ANTLR source, just "import project from existing sources" and click on the "Maven Projects" tab in right gutter of IDE. It should build stuff in the background automatically and look like: