85 lines
4.6 KiB
Markdown
85 lines
4.6 KiB
Markdown
# PMD - source code analyzer
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[](https://app.gitter.im/#/room/#pmd_pmd:gitter.im?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
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[](https://github.com/pmd/pmd/actions)
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[](https://maven-badges.herokuapp.com/maven-central/net.sourceforge.pmd/pmd)
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[](https://github.com/jvm-repo-rebuild/reproducible-central/tree/master/content/net/sourceforge/pmd#readme)
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[](https://coveralls.io/github/pmd/pmd)
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[](https://app.codacy.com/organizations/gh/pmd/dashboard)
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[](code_of_conduct.md)
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[](https://docs.pmd-code.org/latest/)
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**PMD** is an extensible multilanguage static code analyzer. It finds common programming flaws like unused variables,
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empty catch blocks, unnecessary object creation, and so forth. It's mainly concerned with **Java and
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Apex**, but **supports 16 other languages**. It comes with **400+ built-in rules**. It can be
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extended with custom rules. It uses JavaCC and Antlr to parse source files into abstract syntax trees
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(AST) and runs rules against them to find violations. Rules can be written in Java or using a XPath query.
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Currently, PMD supports Java, JavaScript, Salesforce.com Apex and Visualforce,
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Kotlin, Swift, Modelica, PLSQL, Apache Velocity, JSP, WSDL, Maven POM, HTML, XML and XSL.
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Scala is supported, but there are currently no Scala rules available.
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Additionally, it includes **CPD**, the copy-paste-detector. CPD finds duplicated code in
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Coco, C/C++, C#, Dart, Fortran, Gherkin, Go, Groovy, HTML, Java, JavaScript, JSP, Julia, Kotlin,
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Lua, Matlab, Modelica, Objective-C, Perl, PHP, PLSQL, Python, Ruby, Salesforce.com Apex and
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Visualforce, Scala, Swift, T-SQL, Typescript, Apache Velocity, WSDL, XML and XSL.
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## 🚀 Installation and Usage
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Download the latest binary zip from the [releases](https://github.com/pmd/pmd/releases/latest)
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and extract it somewhere.
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Execute `bin/pmd check` or `bin\pmd.bat check`.
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See also [Getting Started](https://docs.pmd-code.org/latest/pmd_userdocs_installation.html)
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**Demo:**
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This shows how PMD analyses [openjdk](https://github.com/openjdk/jdk):
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There are plugins for Maven and Gradle as well as for various IDEs.
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See [Tools / Integrations](https://docs.pmd-code.org/latest/pmd_userdocs_tools.html)
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## ℹ️ How to get support?
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* How do I? -- Ask a question on [StackOverflow](https://stackoverflow.com/questions/tagged/pmd)
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or on [discussions](https://github.com/pmd/pmd/discussions).
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* I got this error, why? -- Ask a question on [StackOverflow](https://stackoverflow.com/questions/tagged/pmd)
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or on [discussions](https://github.com/pmd/pmd/discussions).
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* I got this error and I'm sure it's a bug -- file an [issue](https://github.com/pmd/pmd/issues).
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* I have an idea/request/question -- create a new [discussion](https://github.com/pmd/pmd/discussions).
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* I have a quick question -- ask in our [Gitter room](https://app.gitter.im/#/room/#pmd_pmd:gitter.im).
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* Where's your documentation? -- <https://docs.pmd-code.org/latest/>
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## 🤝 Contributing
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Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.
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Our latest source of PMD can be found on [GitHub](https://github.com/pmd/pmd). Fork us!
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* [How to build PMD](BUILDING.md)
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* [How to contribute to PMD](CONTRIBUTING.md)
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The rule designer is developed over at [pmd/pmd-designer](https://github.com/pmd/pmd-designer).
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Please see [its README](https://github.com/pmd/pmd-designer#contributing) for
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developer documentation.
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## 💵 Financial Contributors
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Become a financial contributor and help us sustain our community. [Contribute](https://opencollective.com/pmd/contribute)
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## ✨ Contributors
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This project follows the [all-contributors](https://github.com/all-contributors/all-contributors) specification.
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Contributions of any kind welcome!
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See [credits](docs/pages/pmd/projectdocs/credits.md) for the complete list.
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## 📝 License
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[BSD Style](LICENSE)
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