Maven compile with multiple src directories

Question

Is there a way to compile multiple java source directories in a single maven project

User · Answer

This worked for me   lt build gt       lt sourceDirectory gt   lt  sourceDirectory gt       lt plugins gt           lt plugin gt           lt groupId gt org apache maven plugins lt  groupId gt           lt artifactId gt maven-compiler-plugin lt  artifactId gt           lt configuration gt           lt includes gt               lt include gt src main java      java lt  include gt               lt include gt src main2 java      java lt  include gt           lt  includes gt           lt  configuration gt           lt  plugin gt       lt  plugins gt   lt  build gt

User · Answer

This worked for with maven 3 5 4 and now Intellij Idea see this code as source   lt plugin gt        lt groupId gt org apache maven plugins lt  groupId gt        lt artifactId gt maven-compiler-plugin lt  artifactId gt        lt version gt 3 3 lt  version gt        lt configuration gt            lt generatedSourcesDirectory gt src main generated lt  generatedSourcesDirectory gt                            lt  configuration gt   lt  plugin gt

User · Answer

I naively do it this way     lt build gt     lt finalName gt osmwse lt  finalName gt     lt sourceDirectory gt src main java  src interfaces  src services lt  sourceDirectory gt   lt  build gt

User · Answer

This can be done in two steps    For each source directory you should create own module  In all modules you should specify the same build directory    build directory    If you work with started Jetty  jetty run   then recompilation of any class in any module  with Maven  IDEA or Eclipse  will lead to Jetty s restart  The same behavior you ll get for modified resources

User · Answer

In the configuration  you can use  lt compileSourceRoots gt    oal           org apache maven plugins maven-compiler-plugin 3 8 1 compile  default-cli   DEBUG  Style          Regular  DEBUG  Configuration   lt  xml version  1 0  encoding  UTF-8   gt   lt configuration gt     lt basedir default-value    basedir    gt     lt buildDirectory default-value    project build directory    gt     lt compilePath default-value    project compileClasspathElements    gt     lt compileSourceRoots default-value    project compileSourceRoots    gt     lt compilerId default-value  javac  gt   maven compiler compilerId  lt  compilerId gt     lt compilerReuseStrategy default-value    reuseCreated   gt   maven compiler compilerReuseStrategy  lt  compilerReuseStrategy gt     lt compilerVersion gt   maven compiler compilerVersion  lt  compilerVersion gt     lt debug default-value  true  gt   maven compiler debug  lt  debug gt     lt debuglevel gt   maven compiler debuglevel  lt  debuglevel gt     lt encoding default-value    project build sourceEncoding   gt   encoding  lt  encoding gt     lt executable gt   maven compiler executable  lt  executable gt     lt failOnError default-value  true  gt   maven compiler failOnError  lt  failOnError gt     lt failOnWarning default-value  false  gt   maven compiler failOnWarning  lt  failOnWarning gt     lt forceJavacCompilerUse default-value  false  gt   maven compiler forceJavacCompilerUse  lt  forceJavacCompilerUse gt     lt fork default-value  false  gt   maven compiler fork  lt  fork gt     lt generatedSourcesDirectory default-value    project build directory  generated-sources annotations   gt     lt maxmem gt   maven compiler maxmem  lt  maxmem gt     lt meminitial gt   maven compiler meminitial  lt  meminitial gt     lt mojoExecution default-value    mojoExecution    gt     lt optimize default-value  false  gt   maven compiler optimize  lt  optimize gt     lt outputDirectory default-value    project build outputDirectory    gt     lt parameters default-value  false  gt   maven compiler parameters  lt  parameters gt     lt project default-value    project    gt     lt projectArtifact default-value    project artifact    gt     lt release gt   maven compiler release  lt  release gt     lt session default-value    session    gt     lt showDeprecation default-value  false  gt   maven compiler showDeprecation  lt  showDeprecation gt     lt showWarnings default-value  false  gt   maven compiler showWarnings  lt  showWarnings gt     lt skipMain gt   maven main skip  lt  skipMain gt     lt skipMultiThreadWarning default-value  false  gt   maven compiler skipMultiThreadWarning  lt  skipMultiThreadWarning gt     lt source default-value  1 6  gt   maven compiler source  lt  source gt     lt staleMillis default-value  0  gt   lastModGranularityMs  lt  staleMillis gt     lt target default-value  1 6  gt   maven compiler target  lt  target gt     lt useIncrementalCompilation default-value  true  gt   maven compiler useIncrementalCompilation  lt  useIncrementalCompilation gt     lt verbose default-value  false  gt   maven compiler verbose  lt  verbose gt   lt  configuration gt    these are all the configurations available for 3 8 1 version of compiler plugin  Different versions have different configurations which you can find by running your code with -X after the general mvn command  Like  mvn clean install -X mvn compiler compile -X   and search with id or goal or plugin name This may help with other plugins too  Eclipse  intelliJ may not show all configurations as suggestions

User · Answer

This worked for me   lt build gt       lt sourceDirectory gt   lt  sourceDirectory gt       lt plugins gt           lt plugin gt           lt groupId gt org apache maven plugins lt  groupId gt           lt artifactId gt maven-compiler-plugin lt  artifactId gt           lt configuration gt           lt includes gt               lt include gt src main java      java lt  include gt               lt include gt src main2 java      java lt  include gt           lt  includes gt           lt  configuration gt           lt  plugin gt       lt  plugins gt   lt  build gt

User · Answer

You can add a new source directory with build-helper   lt build gt       lt plugins gt           lt plugin gt               lt groupId gt org codehaus mojo lt  groupId gt               lt artifactId gt build-helper-maven-plugin lt  artifactId gt               lt version gt 3 2 0 lt  version gt               lt executions gt                   lt execution gt                       lt phase gt generate-sources lt  phase gt                       lt goals gt                           lt goal gt add-source lt  goal gt                       lt  goals gt                       lt configuration gt                           lt sources gt                               lt source gt src main generated lt  source gt                           lt  sources gt                       lt  configuration gt                   lt  execution gt               lt  executions gt           lt  plugin gt       lt  plugins gt   lt  build gt

User · Answer

to make it work in intelliJ  you can also add   lt generatedSourcesDirectory gt src main generated lt  generatedSourcesDirectory gt    to maven-compiler-plugin

User · Answer

This worked for with maven 3 5 4 and now Intellij Idea see this code as source   lt plugin gt        lt groupId gt org apache maven plugins lt  groupId gt        lt artifactId gt maven-compiler-plugin lt  artifactId gt        lt version gt 3 3 lt  version gt        lt configuration gt            lt generatedSourcesDirectory gt src main generated lt  generatedSourcesDirectory gt                            lt  configuration gt   lt  plugin gt

User · Answer

While the answer from evokk is basically correct  it is missing test classes  You must add test classes with goal add-test-source   lt execution gt       lt phase gt generate-sources lt  phase gt       lt goals gt           lt goal gt add-test-source lt  goal gt       lt  goals gt       lt configuration gt          lt sources gt               lt source gt target generated some-test-classes lt  source gt           lt  sources gt       lt  configuration gt   lt  execution gt

User · Answer

This also works with maven by defining the resources tag  You can name your src folder names whatever you like        lt resources gt           lt resource gt               lt directory gt src main java lt  directory gt               lt includes gt                   lt include gt      java lt  include gt                   lt include gt      properties lt  include gt                   lt include gt      xml lt  include gt               lt  includes gt           lt  resource gt            lt resource gt               lt directory gt src main resources lt  directory gt               lt includes gt                   lt include gt      java lt  include gt                   lt include gt      properties lt  include gt                   lt include gt      xml lt  include gt               lt  includes gt           lt  resource gt            lt resource gt               lt directory gt src main generated lt  directory gt               lt includes gt                   lt include gt      java lt  include gt                   lt include gt      properties lt  include gt                   lt include gt      xml lt  include gt               lt  includes gt           lt  resource gt       lt  resources gt

User · Answer

Used the build-helper-maven-plugin from the post - and update src main generated   And mvn clean compile works on my    common src main java  or on    common  so kept the latter   Then yes  confirming that IntelliJ IDEA  ver 10 5 2  level of the compilation failed as David Phillips mentioned  The issue was that IDEA did not add another source root to the project   Adding it manually solved the issue   It s not nice as editing anything in the project should come from maven and not from direct editing of IDEA s project options   Yet I will be able to live with it until they support build-helper-maven-plugin directly such that it will auto add the sources   Then needed another workaround to make this work though   Since each time IDEA re-imported maven settings after a pom change me newly added source was kept on module  yet it lost it s Source Folders selections and was useless   So for IDEA - need to set these once    Select - Project Settings   Maven   Importing   keep source and test folders on reimport   Add - Project Structure   Project Settings   Modules    Module    Sources   Add Content Root    Now keeping those folders on import is not the best practice in the world either       but giving it a try

User · Answer

This worked for me   lt build gt       lt sourceDirectory gt   lt  sourceDirectory gt       lt plugins gt           lt plugin gt           lt groupId gt org apache maven plugins lt  groupId gt           lt artifactId gt maven-compiler-plugin lt  artifactId gt           lt configuration gt           lt includes gt               lt include gt src main java      java lt  include gt               lt include gt src main2 java      java lt  include gt           lt  includes gt           lt  configuration gt           lt  plugin gt       lt  plugins gt   lt  build gt

User · Answer

You can add a new source directory with build-helper   lt build gt       lt plugins gt           lt plugin gt               lt groupId gt org codehaus mojo lt  groupId gt               lt artifactId gt build-helper-maven-plugin lt  artifactId gt               lt version gt 3 2 0 lt  version gt               lt executions gt                   lt execution gt                       lt phase gt generate-sources lt  phase gt                       lt goals gt                           lt goal gt add-source lt  goal gt                       lt  goals gt                       lt configuration gt                           lt sources gt                               lt source gt src main generated lt  source gt                           lt  sources gt                       lt  configuration gt                   lt  execution gt               lt  executions gt           lt  plugin gt       lt  plugins gt   lt  build gt

User · Answer

In the configuration  you can use  lt compileSourceRoots gt    oal           org apache maven plugins maven-compiler-plugin 3 8 1 compile  default-cli   DEBUG  Style          Regular  DEBUG  Configuration   lt  xml version  1 0  encoding  UTF-8   gt   lt configuration gt     lt basedir default-value    basedir    gt     lt buildDirectory default-value    project build directory    gt     lt compilePath default-value    project compileClasspathElements    gt     lt compileSourceRoots default-value    project compileSourceRoots    gt     lt compilerId default-value  javac  gt   maven compiler compilerId  lt  compilerId gt     lt compilerReuseStrategy default-value    reuseCreated   gt   maven compiler compilerReuseStrategy  lt  compilerReuseStrategy gt     lt compilerVersion gt   maven compiler compilerVersion  lt  compilerVersion gt     lt debug default-value  true  gt   maven compiler debug  lt  debug gt     lt debuglevel gt   maven compiler debuglevel  lt  debuglevel gt     lt encoding default-value    project build sourceEncoding   gt   encoding  lt  encoding gt     lt executable gt   maven compiler executable  lt  executable gt     lt failOnError default-value  true  gt   maven compiler failOnError  lt  failOnError gt     lt failOnWarning default-value  false  gt   maven compiler failOnWarning  lt  failOnWarning gt     lt forceJavacCompilerUse default-value  false  gt   maven compiler forceJavacCompilerUse  lt  forceJavacCompilerUse gt     lt fork default-value  false  gt   maven compiler fork  lt  fork gt     lt generatedSourcesDirectory default-value    project build directory  generated-sources annotations   gt     lt maxmem gt   maven compiler maxmem  lt  maxmem gt     lt meminitial gt   maven compiler meminitial  lt  meminitial gt     lt mojoExecution default-value    mojoExecution    gt     lt optimize default-value  false  gt   maven compiler optimize  lt  optimize gt     lt outputDirectory default-value    project build outputDirectory    gt     lt parameters default-value  false  gt   maven compiler parameters  lt  parameters gt     lt project default-value    project    gt     lt projectArtifact default-value    project artifact    gt     lt release gt   maven compiler release  lt  release gt     lt session default-value    session    gt     lt showDeprecation default-value  false  gt   maven compiler showDeprecation  lt  showDeprecation gt     lt showWarnings default-value  false  gt   maven compiler showWarnings  lt  showWarnings gt     lt skipMain gt   maven main skip  lt  skipMain gt     lt skipMultiThreadWarning default-value  false  gt   maven compiler skipMultiThreadWarning  lt  skipMultiThreadWarning gt     lt source default-value  1 6  gt   maven compiler source  lt  source gt     lt staleMillis default-value  0  gt   lastModGranularityMs  lt  staleMillis gt     lt target default-value  1 6  gt   maven compiler target  lt  target gt     lt useIncrementalCompilation default-value  true  gt   maven compiler useIncrementalCompilation  lt  useIncrementalCompilation gt     lt verbose default-value  false  gt   maven compiler verbose  lt  verbose gt   lt  configuration gt    these are all the configurations available for 3 8 1 version of compiler plugin  Different versions have different configurations which you can find by running your code with -X after the general mvn command  Like  mvn clean install -X mvn compiler compile -X   and search with id or goal or plugin name This may help with other plugins too  Eclipse  intelliJ may not show all configurations as suggestions

User · Answer

You can add a new source directory with build-helper   lt build gt       lt plugins gt           lt plugin gt               lt groupId gt org codehaus mojo lt  groupId gt               lt artifactId gt build-helper-maven-plugin lt  artifactId gt               lt version gt 3 2 0 lt  version gt               lt executions gt                   lt execution gt                       lt phase gt generate-sources lt  phase gt                       lt goals gt                           lt goal gt add-source lt  goal gt                       lt  goals gt                       lt configuration gt                           lt sources gt                               lt source gt src main generated lt  source gt                           lt  sources gt                       lt  configuration gt                   lt  execution gt               lt  executions gt           lt  plugin gt       lt  plugins gt   lt  build gt

User · Answer

Used the build-helper-maven-plugin from the post - and update src main generated   And mvn clean compile works on my    common src main java  or on    common  so kept the latter   Then yes  confirming that IntelliJ IDEA  ver 10 5 2  level of the compilation failed as David Phillips mentioned  The issue was that IDEA did not add another source root to the project   Adding it manually solved the issue   It s not nice as editing anything in the project should come from maven and not from direct editing of IDEA s project options   Yet I will be able to live with it until they support build-helper-maven-plugin directly such that it will auto add the sources   Then needed another workaround to make this work though   Since each time IDEA re-imported maven settings after a pom change me newly added source was kept on module  yet it lost it s Source Folders selections and was useless   So for IDEA - need to set these once    Select - Project Settings   Maven   Importing   keep source and test folders on reimport   Add - Project Structure   Project Settings   Modules    Module    Sources   Add Content Root    Now keeping those folders on import is not the best practice in the world either       but giving it a try

User · Answer

to make it work in intelliJ  you can also add   lt generatedSourcesDirectory gt src main generated lt  generatedSourcesDirectory gt    to maven-compiler-plugin

User · Answer

I naively do it this way     lt build gt     lt finalName gt osmwse lt  finalName gt     lt sourceDirectory gt src main java  src interfaces  src services lt  sourceDirectory gt   lt  build gt

User · Answer

You can add a new source directory with build-helper   lt build gt       lt plugins gt           lt plugin gt               lt groupId gt org codehaus mojo lt  groupId gt               lt artifactId gt build-helper-maven-plugin lt  artifactId gt               lt version gt 3 2 0 lt  version gt               lt executions gt                   lt execution gt                       lt phase gt generate-sources lt  phase gt                       lt goals gt                           lt goal gt add-source lt  goal gt                       lt  goals gt                       lt configuration gt                           lt sources gt                               lt source gt src main generated lt  source gt                           lt  sources gt                       lt  configuration gt                   lt  execution gt               lt  executions gt           lt  plugin gt       lt  plugins gt   lt  build gt

User · Answer

This can be done in two steps    For each source directory you should create own module  In all modules you should specify the same build directory    build directory    If you work with started Jetty  jetty run   then recompilation of any class in any module  with Maven  IDEA or Eclipse  will lead to Jetty s restart  The same behavior you ll get for modified resources

User · Answer

This also works with maven by defining the resources tag  You can name your src folder names whatever you like        lt resources gt           lt resource gt               lt directory gt src main java lt  directory gt               lt includes gt                   lt include gt      java lt  include gt                   lt include gt      properties lt  include gt                   lt include gt      xml lt  include gt               lt  includes gt           lt  resource gt            lt resource gt               lt directory gt src main resources lt  directory gt               lt includes gt                   lt include gt      java lt  include gt                   lt include gt      properties lt  include gt                   lt include gt      xml lt  include gt               lt  includes gt           lt  resource gt            lt resource gt               lt directory gt src main generated lt  directory gt               lt includes gt                   lt include gt      java lt  include gt                   lt include gt      properties lt  include gt                   lt include gt      xml lt  include gt               lt  includes gt           lt  resource gt       lt  resources gt

User · Answer

This worked for me   lt build gt       lt sourceDirectory gt   lt  sourceDirectory gt       lt plugins gt           lt plugin gt           lt groupId gt org apache maven plugins lt  groupId gt           lt artifactId gt maven-compiler-plugin lt  artifactId gt           lt configuration gt           lt includes gt               lt include gt src main java      java lt  include gt               lt include gt src main2 java      java lt  include gt           lt  includes gt           lt  configuration gt           lt  plugin gt       lt  plugins gt   lt  build gt

User · Answer

While the answer from evokk is basically correct  it is missing test classes  You must add test classes with goal add-test-source   lt execution gt       lt phase gt generate-sources lt  phase gt       lt goals gt           lt goal gt add-test-source lt  goal gt       lt  goals gt       lt configuration gt          lt sources gt               lt source gt target generated some-test-classes lt  source gt           lt  sources gt       lt  configuration gt   lt  execution gt

[java] Maven compile with multiple src directories

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