In theory, we can use any image as long as it supports the build process. In this case, it is a standard docker image containing JDK8 made available by the good folks behind the Adopt OpenJDK build farm. We will be referring to the docker image by its full name (as available on under the account name used - adoptopenjdk). The below lines in the configuration file will ensure that our installed applications are cached (referring to the two specific directories) so that we don’t have to reinstall the dependencies each time a build occurs: dependencies: circleci for the full listing, see commit df28ee7 for the source changes. To understand how this is done, we will be going through the CircleCI configuration file section-by-section (stored in. We expect the build to run longer the first time and, depending on the levels of caching, it will speed up. We will have to install the necessary dependencies in this available environment in order for a successful build. Approach 1: using a standard Docker containerįor this approach, CircleCI requires a docker image that is available in Docker Hub or another public/private registry it has access to. We will now go through the two approaches mentioned above and see the pros and cons of both of them. A CircleCI build with a pre-built and optimised Docker container (shorter build time, shorter config script).A CircleCI build with a standard Docker container (longer build time, longer config script).Let’s get startedĭuring the process of researching CircleCI as a CI/CD solution to build the Graal compiler, I learned that we could run builds via two different approaches, namely: In addition to ensuring that our new code does not introduce a breaking change, another great feature of CI/CD tools is that we can automate the creation of binaries and the automatic deployment of those binaries, making them available for open source distribution. A CI/CD tool lets us add automated tests to ensure that we get the desired outcome from our scripts when every PR is merged. For this project, it is important that we are able to verify and validate the scripts required to build the Graal compiler for Linux and macOS, both locally and in a Docker container. Seeing why your builds are failing provides you with an opportunity to make a fix faster. One of the greatest is the ability to check the health of the code-base. Why use a CI tool to build the Graal compiler?Ĭontinuous integration (CI) and continuous deployment (CD) tools have many benefits. Although these scripts can be used to that, and there exists a branch which contains the rest of the steps. Note: we are not covering how to build the whole of the GraalVM suite in this post, that can be done via another post. a zip archive containing Graal & Truffle modules/components.JDK8 embedded with the Graal compiler, and.In this post, we are going to build the Graal compiler with JDK8 on CircleCI. This gives us the ability to fork/clone it and build our own version of the Graal compiler. The Graal compiler is open source and is available on GitHub (along with the HotSpot JVMCI sources needed to build the Graal compiler). The researchers and engineers at Oracle Labs have created a variant of JDK8 with JVMCI enabled which can be used to build the Graal compiler. New changes starting with Java 9 mean that we can now plug in our own hand-written C2 compiler into the JVM, thanks to JVMCI. It is written in Java with the goal of better performance (among other goals) as compared to the C2 compiler. The Graal compiler is a replacement to HotSpot’s server-side JIT compiler widely known as the C2 compiler. The image in one of the below sections can be also found on flickr and created by fklv (Obsolete hipster). Citation: feature image on the blog can be found on flickr and created by Luca Galli.
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