#GOLAND BUILD TAGS INSTALL#
Recommended to install the version of Go that our continuous integration is If you don’t add the go bin directory to theĮxecutable path you will have to manage this yourself. To be able to use these you must have the "$GOPATH"/bin directory Make watch-backend, Gitea will automatically download and build these as Note: When executing make tasks that require external tools, like The minimum supported Node.jsĪnd the latest LTS version is recommended. Required to build the JavaScript and CSS files. Configuring local ElasticSearch instance.Formatting, code analysis and spell check.Downloading and cloning the Gitea source code.It's an easy-to-use framework for building serverless applications with containers. Serverless by use-case: Alexa skill for Dockerconįor an example of -ldflags in action - checkout the CLI for my project Functions as a Service (FaaS). If you enjoyed this blog post check out the rest of my Golang fundamentals series: Here's an example of one of my Dockerfiles which builds a Golang application for a Raspberry Pi, MacOS and 64-bit Linux all in one file using multi-stage builds: You can take it further and optimize the size of the Docker image by using Multi-stage builds.
#GOLAND BUILD TAGS HOW TO#
Now this is just a minimal example to show you how to get started with Docker and Go build-time variables. Run a build and then test it out: $ docker build -t git-tester. RUN GIT_COMMIT=$(git rev-list -1 HEAD) & \
#GOLAND BUILD TAGS UPDATE#
Once you have worked out your build-time variables it's likely you will want to update your Dockerfile.
Now we see our application has a hard-coded version which we injected at build-time. Go build -ldflags "-X main.GitCommit=$GIT_COMMIT" $ export GIT_COMMIT=$(git rev-list -1 HEAD) & \ Now we need an additional override to our go build command to pass information to the linker via the -ldflags flag. The version is empty, but we're now ready to start injecting a variable. Test it out with go build: $ go build & \ package mainįmt.Printf("Hello world, version: %s\n", GitCommit) In order to pass a build-time variable we need to create a variable within our main package. Next we can capture that into an environmental variable: $ export GIT_COMMIT=$(git rev-list -1 HEAD) & \ Here's how you find the ID of your last commit: $ git rev-list -1 HEAD Capture useful variable(s)īefore you get started, think about what makes sense to be injected at build-time? It could be anything from the hostname of the CI machine to the result of a web-service call or more commonly the last commit ID from your Git log.Ĭreate a test Git project with a README $ mkdir /tmp/git-tester & \ This is a great way to support your users - you can quickly and easily identify which build they are using and how old it could be. Here's an example where the Docker project's CLI contains a commit ID of 77b4dce: $ docker version You may also like my new ebook - Everyday Golang which is full of practical examples and tips from open-source Go applications including JSON, HTTP servers, embedding, databases, templates and Goroutines. This is most useful for tagging your binary with a version or Git shasum or digest from version control. In this blog post I'm going to show you how to inject variables into your Golang executable at build-time.
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