8/7/2023 0 Comments Lighttable packaged juliaIf there's nothing to do, instantiate does nothing. In short, instantiate is your friend to make sure an environment is ready to use. If you already have a resolved Manifest.toml, then you will still need to ensure that the packages are installed and with the correct versions. If you only have a Project.toml, a Manifest.toml must be generated by "resolving" the environment, then any missing packages must be installed and precompiled. Note that activate by itself does not install missing dependencies. Otherwise, it will resolve the latest versions of the dependencies compatible with the project. If the project contains a manifest, this will install the packages in the same state that is given by that manifest. No Changes to `~/Example.jl/Manifest.toml` No Changes to `~/Example.jl/Project.toml` git clone, cd to the project directory and call shell> git clone See Project.toml and Manifest.toml for a more detailed explanation. This new environment is completely separate from the one we used earlier. # This file is machine-generated - editing it directly is not advised Julia> print(read(joinpath("MyProject", "Manifest.toml"), String)) Until a package is added, there are no files in this environment and the directory to the environment might not even be created: julia> isdir("MyProject")ġ dependency successfully precompiled in 2 seconds Note that the REPL prompt changes when the new project is activated. Status `~/MyProject/Project.toml` (empty project) In order to create a new project, create a directory for it and then activate that directory to make it the "active project", which package operations manipulate: pkg> activate MyProjectĪctivating new environment at `~/MyProject/Project.toml` It should be pointed out that when two projects use the same package at the same version, the content of this package is not duplicated. This approach has the benefit of allowing you to check in a Project.toml, and even a Manifest.toml if you wish, into version control (e.g. ![]() It is however easy to create other, independent, projects. So far we have added packages to the default environment at ~/.julia/environments/v1.8. For more on the role, environments play in code loading, including the "stack" of environments from which code can be loaded, see this section in the Julia manual. The following discusses Pkg's interaction with environments.
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