That file may typically contain calls to other test files via include(fname). While you can change the author(s) detail, don't change anything else for now. Creating a new Julia package In order to create a new package, we must first satisfy a few prerequisites. Please enable it to continue. Since the General registry belongs to the entire community, people may have opinions about your package name when you publish it, especially if it's ambiguous or can be confused with something other than what it is. We recommend that you use PkgTemplates for creating new packages instead of using the minimal pkg> generate functionality described below. To do this, in Pkg mode write: Note: if you wanted to work on a repository that is already on GitHub but not yet on your computer, you could also use dev and just specify the appropriate repository url as path. This is a quick post on package development in Julia 1.0. Why. src/PackageExample.jl the main module file of your package, this will be where all your methods are defined, exported etc. Julia has been downloaded over 17 million times and the Julia community has registered over 4,000 Julia packages for community use. Of course, I use GNU+Linux, so I just set it up to compile for X11. Packaging method. In our case there is only two functions to test, so we will just write in runtests.jl directly: To test your package you can then just run runtests.jl or alternatively you can use the Pkg mode again: If you're back in the main environment, just apply resolve and then test Ex: Note: you only need to call resolve if you've added new dependencies to the project (here we added Test). This can be done from the Pkg REPL by activating this environment, and then use add as one normally does. Sample example code Now that the setup has been completed, we can go ahead and implement our first code in Julia … Powered by Documenter.jl and the Julia Programming Language. You don't have to use quotes or the ".jl" suffix. Let’s start with a little tutorial for those who are taking their first steps in creating packages for Julia. If you have an existing package from an older version of Julia (using a REQUIRE file rather than Project.toml), then you can generate a Project.toml file by first creating a gen_project.jl file in your desired package (create a new file called gen_project.jl and then paste in the code from here). This creates a new project HelloWorld with the following files (visualized with the external tree command): The Project.toml file contains the name of the package, its unique UUID, its version, the authors and potential dependencies: We can now activate the project and load the package: Let’s say we want to use the standard library package Random and the registered package JSON in our project. (Delete REQUIRE and commit the resulting Project.toml after checking it for correctness and adding a version = "..." line.). If you are using a different version, just replace v0.6 by the number corresponding to your current version of julia. The PkgTemplates package offers a very easy, repeatable, and customizable way to generate the files for a new package. Adding Windows metadata to the package A Windows Runtime Component requires metadata that describes all of its publicly available types, which makes it possible for other apps and libraries to consume the component. Then this tutorial is for you! To add a test-specific dependency, i.e. It can also install external libraries using your operating system's standard system for … We can now use both Random and JSON in our project. If you have an existing package from an older version of Julia (using a REQUIRE file rather than Project.toml), then you can generate a Project.toml file by first creating a gen_project.jl file in your desired package (create a new file called gen_project.jl and then paste in the code from here). In order to add dependencies and have them not clashing with the dependencies of other packages you may be developing, you need to enter the environment of Ex and add the relevant dependency there. and reloading the package, the new greet_alien function that uses Random can be called: The build step is executed the first time a package is installed or when explicitly invoked with build. Suppose you came up with the formula to calculate n-th term of the famed Fibonacci series. Creating Julia Packages. It provides a visual interface for exploring the Julia language's open-source ecosystem. Julia Observer helps you find your next Julia package. Thus, when running tests, this will be the active project, and only dependencies to the test/Project.toml project can be used. Julia programming language gets a new default package manager and easier bug reporting. To leave the package-specific environment, just use activate again but without arguments: Remark: a recent fix was added to Pkg so that you can do (v1.0) pkg> dev ~/.julia/dev/Ex instead of cd followed by activate .. While it is a general purpose language and can be used to write any application, many of its features are well-suited for high-performance numerical analysis and computational science.” — from Wikipedia: Julia (programming language).