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Java Buildpack Memory Calculator

Getting started

Install Go and then get the memory calculator (in the Go source tree).

We run our tests with Ginkgo/Gomega and manage dependencies with Godep. Ginkgo is one of the dependencies we manage, so get Godep before starting work:

go get -v github.com/cloudfoundry/java-buildpack-memory-calculator
cd src/github.com/cloudfoundry/java-buildpack-memory-calculator

go get -v github.com/tools/godep

(The -v options on go get are there so you can see what packages are compiled under the covers.)

The (bash) script ci/test.sh uses (the correct version of) Ginkgo to run the tests (using the correct versions of the dependencies). test.sh will recompile Ginkgo if necessary.

The parameters to runTests are passed directly to Ginkgo. For example:

ci/test.sh -r=false memory

will run the tests in the memory subdirectory without recursion into lower subdirectories (which is the default).

The current Go environment is not modified by test.sh.

Development

To develop against the code, you should issue:

godep restore

in the project directory before building or running tests directly from the command line.

If you wish to develop against a particular tagged version then, in the project directory, you need to checkout this version (using git checkout <tag>) and re-issue godep restore before proceeding.

If godep restore fails, it is because one of the dependencies cannot be obtained, or else it cannot be (re)set to the version this project depends on. Normally go get -u <project> for the dependency in error will then allow godep restore to complete normally.

Release binaries

The executables are built for more than one platform, so the Go compiler must exist for the target platforms we need (currently linux and darwin). The shell script (ci/build.sh) will use the Go compiler with the GOOS environment variable to generate the executables.

This will not work if the Go installation doesn't support all these platforms, so you may have to ensure Go is installed with cross-compiler support.

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Cloud Foundry JVM Memory Calculator

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