* GH-3438: Add Build from Source into CONTRIBUTING Fixes https://github.com/spring-projects/spring-integration/issues/3438 It is not clear at the moment what Java version and what build system is used in the project from the `CONTRIBUTING.adoc` * Add `Build from Source` section into the `CONTRIBUTING.adoc` * Point to the `CONTRIBUTING.adoc` from the top level `README.md` * Fix the current Java version in the `README.md` * Mention that `Squash commits` must be avoided for subsequent commits into the PR * * Apply suggest change for docs result * Change Travis config to use `oraclejdk11` which is minimal already for for the project
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Spring Integration

Code of Conduct
Please see our Code of conduct.
Reporting Security Vulnerabilities
Please see our Security policy.
Checking out and Building
To check out the project and build from the source, do the following:
git clone git://github.com/spring-projects/spring-integration.git
cd spring-integration
./gradlew build
NOTE: While Spring Integration runs with Java SE 8 or higher, a Java 11 compiler is required to build the project.
To build and install jars into your local Maven cache:
./gradlew publishToMavenLocal
To build api Javadoc (results will be in build/api):
./gradlew api
To build the reference documentation (results will be in build/docs/asciidoc and build/docs/asciidocPdf):
./gradlew reference
To build complete distribution including -dist, -docs, and -schema zip files (results will be in build/distributions):
./gradlew dist
Using Eclipse
To generate Eclipse metadata (.classpath and .project files), do the following:
./gradlew eclipse
Once complete, you may then import the projects into Eclipse as usual:
File -> Import -> Existing projects into workspace
Browse to the 'spring-integration' root directory. All projects should import free of errors.
Using IntelliJ IDEA
To generate IDEA metadata (.iml and .ipr files), do the following:
./gradlew idea
See also Contributor Guidelines.
Resources
For more information, please visit the Spring Integration website at: https://projects.spring.io/spring-integration