*vim-java-classpath.html*

Eclipse Classpath Editing
*************************

Source code completion, searching, auto imports, all rely on a
properly configured classpath.  When you first create a project, a
.classpath file is created in the project’s root directory.  If you
created the project on an existing code-base, eclim will attempt to
setup the .classpath file with any source code directories or
libraries in the project.

Regardless of the state of your project you will at some point need to
update the classpath.  The primary method of doing so, is to directly
edit the .classpath to add, update, or remove entries as needed. To
help you do this, eclim provides several commands to ease the creation
of new classpath entries and variables.

Note: All of the commands described below are only available while
  editing the .classpath file in vim.When you write the .classpath
  file, Vim will issue a command to the eclim server to update the
  project’s classpath, and will report any errors via vim’s location
  list (:help location-list).In addition to directly editing the
  .classpath file, you may also use maven’s support for maintaining
  the eclipse classpath.  For users who use ivy
  (http://jayasoft.org/ivy), eclim also provides a means to auto
  update the eclipse classpath when saving changes to your ivy.xml.

*:NewSrcEntry_java*

- :NewSrcEntry <dir> - Adds a new entry for a source code directory
  relative to the project’s root directory.
  >
     <classpathentry kind="src" path="src/java"/>

  <

  This command supports command completion of the directory relative
  to the .classpath file.

*:NewProjectEntry_java*

- :NewProjectEntry <project> - Adds a new entry for a dependency on
  another project.
  >
     <classpathentry exported="true" kind="src" path="/a_project"/>

  <

  This command supports command completion of the project name.

*:NewJarEntry_java*

- :NewJarEntry <file> [<src_path> <javadoc_path>] - Adds a new entry
  for a jar file dependency.  If the jar file is not in a folder under
  the project root, you must use an absolute path (apparent limitation
  with Eclipse).
  >
     <classpathentry exported="true" kind="lib" path="lib/commons-beanutils-1.8.3.jar"/>

  <

  You may optionally supply the path to the source for this jar and
  the entry created will include the sourcepath attribute:

  >
     :NewJarEntry lib/commons-beanutils-1.8.3.jar lib/commons-beanutils-1.8.3-sources.jar

  <

  >
     <classpathentry kind="lib" path="lib/commons-beanutils-1.8.3.jar"
         sourcepath="lib/commons-beanutils-1.8.3-sources.jar"/>

  <

  In addition to the source path you can all supply the path to the
  javadocs:

  >
     :NewJarEntry lib/commons-beanutils-1.8.3.jar lib/commons-beanutils-1.8.3-sources.jar lib/commons-beanutils-1.8.3-javadoc.jar

  <

  >
     <classpathentry kind="lib" path="lib/commons-beanutils-1.8.3.jar"
         sourcepath="lib/commons-beanutils-1.8.3-sources.jar">
       <attributes>
         <attribute name="javadoc_location" value="jar:platform:/resource/my_project/lib/commons-beanutils-1.8.3-javadoc.jar"/>
       </attributes>
     </classpathentry>

  <

*:NewVarEntry_java*

- :NewVarEntry <VAR/file> [<src_path> <javadoc_path>] - Just like
  NewJarEntry except an Eclipse “var” entry is created.  When a jar
  entry references an absolute path, you should instead use a var
  entry.  The var entry allows you to define a base dir as a variable
  (ex. USER_HOME = /home/username), and then reference files relative
  to that variable.
  >
     <classpathentry exported="true" kind="var" path="USER_HOME/lib/hibernate-4.0.jar"/>

  <

  This allows you to share .classpath files with other developers
  without each having a local copy with environment specific paths.

  To add new base classpath variables, you can edit
  $ECLIPSE_HOME/plugins/org.eclim_version/classpath_variables.properties

  By default, a USER_HOME variable is created that defaults to the
  java System property “user.home” and you can add more as needed.

  This command supports command completion of Eclipse variable names
  as well as the files and directories beneath the path the variable
  represents.

  To manage the classpath variables, eclim also provides the following
  commands.

  *:VariableList*
  - :VariableList - Lists all the currently available classpath
    variables and their corresponding values.
  *:VariableCreate*
  - :VariableCreate <name> <path> - Creates or updates the variable
    with the supplied name.
  *:VariableDelete*
  - :VariableDelete <name> - Deletes the variable with the supplied
    name.
*classpath-src-javadocs*


Source and Javadoc location
===========================

For your var and lib classpath entries, if you didn’t do so when you
created the entry, you can configure the location for that entry’s
source code and javadocs, like the example below, allowing you to jump
to the source (|:JavaSearch|) or lookup the docs (|:JavaDocSearch|) of
classes, etc found in that library. Note that the javadoc location
must be a url, whether it be on the local file system (file:, jar:file
(jar:file):) or remote (http:).

>

   <classpathentry exported="true" kind="lib" path="lib/hibernate-4.0.jar"
       sourcepath="<path>">
     <attributes>
       <attribute name="javadoc_location" value="file:<javadoc_dir>"/>
     </attributes>
   </classpathentry>

<


Note: If your javadoc location is a jar in your workspace (in the
  curent project or another project), then the url must be in the form
  (where <project_name> is replaced with your project’s name):>

     jar:platform:/resource/<project_name>/path/to/javadoc.jar!/

  <


  If the jar file is outside of your workspace, then it would be in
  the form:>

     jar:file:/your/absolute/path/to/javadoc.jar!/

  <


*classpath-maven*


Maven
=====

Maven (http://maven.apache.org) comes bundled with an Eclipse plugin
that allows you to easily maintain your .classpath file based on your
pom.xml (or project.xml for maven 1.x users).

Note: For additional information on the Eclipse plugin from maven,
  you may visit their online documentation for maven 1.x
  (http://maven.apache.org/maven-1.x/plugins/eclipse/) or maven 2.x
  (http://maven.apache.org/guides/mini/guide-ide-eclipse.html).

*:MvnRepo* *:MavenRepo*

- Initial Setup
  To initialize maven’s support for updating the eclipse classpath you
  first need to set the M2_REPO (or MAVEN_REPO for 1.x) classpath
  variable in the Eclipse workspace by executing the following command
  in vim:

  maven 2.x:

  >
     :MvnRepo

  <

  maven 1.x:

  >
     :MavenRepo

  <

- Updating your .classpath
  Once you have performed the initial setup, updating the Eclipse
  .classpath file is as easy as executing the following at a command
  line:

  maven 2.x:

  >
     mvn eclipse:eclipse

  <

  maven 1.x:

  >
     maven eclipse

  <

  or in Vim:

  maven 2.x:

  >
     :Mvn eclipse:eclipse

  <

  maven 1.x:

  >
     :Maven eclipse

  <

  *classpath-maven-pom*
  For maven 2.x users, eclim also provides support for auto updating
  the .classpath for your project every time you save your pom.xml
  file.  Any entries found in the pom.xml that are not in the
  .classpath will be added, any entries that differ in version will be
  updated, and any stale entries deleted.

  Note: This behavior can be disabled by adding the following
    setting to your vimrc:>

       let g:EclimMavenPomClasspathUpdate = 0

    <


  Note: This feature simply updates the entries in your project’s
    .classpath file, it does not download any newly added jars. When
    you’d like maven to download those new jars, you can run the
    following from the command line:>

       mvn dependency:resolve

    <


    or from within Vim:>

       :Mvn dependency:resolve

    <


*classpath-ivy*


Ivy
===

For users of ivy (http://jayasoft.org/ivy), eclim provides support for
auto updating the .classpath for your project every time you save your
ivy.xml file.  Any entries found in the ivy.xml that are not in the
.classpath will be added, any entries that differ in version will be
updated, and any stale entries deleted.

*:IvyRepo*

- Initial Setup
  Before you can start utilizing the auto updating support, you must
  first set the location of your ivy repository (ivy cache).  This is
  the directory where ivy will download the dependencies to and where
  eclipse will then pick them up to be added to your project’s
  classpath.

  To set the repository location you can use the :IvyRepo command
  which is made available when editing an ivy.xml file.

  >
     :IvyRepo ~/.ivy2/cache/

  <

  If you fail to set this prior to writing the ivy.xml file, eclim
  will emit an error notifying you that you first need to set the
  IVY_REPO variable via this command.

- Updating your .classpath
  Once you have performed the initial setup, updating the Eclipse
  .classpath file is as easy as saving your ivy.xml file (:w) and
  letting eclim do the rest.

  Note: This behavior can be disabled by adding the following
    setting to your vimrc:>

       let g:EclimIvyClasspathUpdate = 0

    <


  Note: This feature will update your project’s .classpath file
    accordingly, but it will not download any newly added jars. For
    that you’ll need to have a target in your ant build file that will
    force ivy to download dependencies. Something like the example
    from the ivy docs:>

       <target name="resolve" description="--> retrieve dependencies with ivy">
         <ivy:retrieve/>
       </target>

    <


    You can then run this target from the command line:>

       ant resolve

    <


    or from within Vim>

       :Ant resolve

    <


- Preserving manually added entries
  When utilizing the ivy support, eclim will attempt to remove any
  stale entries from your .classpath file.  If you have some manually
  added entries, these may be removed as well.  To prevent this you
  can add a classpath entry attribute notifying eclim that the entry
  should be preserved.

  Ex.

  >
     <classpathentry kind="lib" path="lib/j2ee-1.4.jar">
       <attributes>
         <attribute name="eclim.preserve" value="true"/>
       </attributes>
     </classpathentry>

  <

vim:ft=eclimhelp