DISCONTINUED - This Salesforce-only PMD engine will not be updated anymore. Help make https://github.com/codeclimate/codeclimate-pmd available for all languages. Not Java-only.

ApexMetrics - Code Climate engine for Salesforce.com Apex

ApexMetrics is a Code Climate engine for the programming language Apex of the Salesforce.com cloud platform.

If you connect your Github repositories to Code Climate and enable the Engine static code analysis is performed on every commit or pull request. The resulting continuous metrics will tell you where code improved or degraded over time and which hot spots need refactoring.

The engine and all of its "ingredients" are open-source so everybody in the community can contribute. The engine was built by a software engineers at Up2Go who struggled with enforcing Clean Code into their daily work given the lack of metrics tools in the Salesforce.com ecosystem. Not to forget the awesome support by many others.

What we check | How to configure | How to contribute

What issues are recognized?

50+ rules for Apex and Visualforce..

Enable and configure the Engine

Code Climate will not run this engine on your code unless you have this minimal '.codeclimate.yml' (Note the leading dot) in the root directory of your repository.

engines:
  apexmetrics:
    enabled: true
ratings:
  paths:
    - "**.cls"
    - "**.trigger"
    - "**.page"
    - "**.component"

For more details about Code Climate configuration go to docs.codeclimate.com.

Exclude files and paths (optional)

To exclude single files or folders from the analysis add a exclude_paths section to the file like in this minimal example:

engines:
  apexmetrics:
    enabled: true
ratings:
  paths:
    - "**.cls"
    - "**.trigger"
exclude_paths:
  - "/src/triggers"
  - "**.xml"

We recommend you to adapt a copy of this .codeclimate.yml which already excludes most of the irrelevant Salesforce.com files and folders.

For more details about how to exclude files and folders go to docs.codeclimate.com.

PMD Rule customization (optional)

Not all checks make sense under all circumstances so configurability is crucial when it comes to Code metrix. By adjusting your .codeclimate.yml you can eighter disable certain checks for a single issue or for your whole repo.

But that's not enough. One key benefit of Code Climate is grading. Grading not only takes the amount of issues into a account but also how severe issues are to fix. To customize if and when code is marked as issue you need to go "one level deeper". The static code analysis performed by this engine uses an Apex port of the famous Java tool PMD. PMD is very flexible and can be configured using a so called ruleset xml file.

By default or engine uses this apex-ruleset.xml. It enables all rules and runs them with values we came up with as good defaults. Just add a copy of that file to the root directory of your repository and adapt it to your needs.

<rule ref="rulesets/apex/complexity.xml/ExcessiveClassLength" message="Avoid really long classes (lines of code)">
  <priority>3</priority>
  <properties>
    <!-- Rule specific property defining, when a class is marked as too long -->
    <property name="minimum" value="1000"/>

    <!-- Code Climate specific properties -->
    <property name="cc_remediation_points_multiplier" value="150"/>
    <property name="cc_categories" value="Complexity"/>
    <property name="cc_block_highlighting" value="false"/>
  </properties>	
</rule>

Some rules have parameters which define if and when code is marked as issue. To learn how such parameters influence a check go to the readup section of an issue which describs

All properties starting with cc_ are Code Climate specific and define how the results are displayed or how grades are calculated.

cc_remediation_points_multiplier: This is multiplication factor for the Code Climate Remediation Point default of 50.000. To understand the semantics and importance of Remediation point please check the docs.codeclimate.com.
cc_categories: The Code Climate specific categorization. Might differ from PMD.
cc_block_highlighting: Defaults to 'false'. Only the first line of a problematic block is highlighted in the UI. If set to 'true' the whole block is highlighted which currently looks ugly.

How to contribute

There is a lot of room for improvement or extension. Depending on what you want to do you eighter need to fork, extend and pull request this repository or the PMD repository. Please check the Wiki to learn how to contribute.