What’s the recommended API for testing if a package (which may not be registed) is installed? I have seen two versions floating around: "somepackage" ∈ keys(Pkg.installed()) and isdir(Pkg.dir("somepackage")) The second one feels hackish. First I thought checking Pkg.installed("somepackage") but …

The second one is very similar to how Pkg itself does it, so I would not say it’s hackish (unless you believe the approach of Pkg itself to be hackish). If you want to match exactly how Pkg determines if a package is installed, use isinstalled(pkg::AbstractString) = pkg != "METADATA" && pkg != …

Can’t you just use a try catch?

With Julia v0.7.0 and v1.0.0 releases, I want to revive this topic. The reason is that Pkg.installed does not exist anymore in these new releases. Moreover, executing, say, Pkg.dir("OhMyREPL) gives us the following warning on v0.7.0: WARNING: Base.Pkg is deprecated, run `using Pkg` instead likely…

So I’m inferring that your use case is that you want to check whether OhMyREPL is installed in your startup.jl, perhaps so that you can use it if it’s installed. I used to do this because I was changing JULIA_PKGDIR to get separate package environments, and OhMyREPL might not be installed in all of…

Thanks a lot! However, if I put using OhMyREPL directly in my ~/.julia/config/startup.jl (v0.7/v1.0 replacement of ~/.juliarc.jl), then for normal Julia sessions, I don’t have any problem, but when I try to build Conda.jl, it somehow says that it cannot find OhMyREPL package and suggests that I sho…

[image] BVPs: but when I try to build Conda.jl, it somehow says that it cannot find OhMyREPL package and suggests that I should run Pkg.add("OhMyREPL") Yeah, this is a known bug ( Building packages call `startup.jl` with every build · Issue #609 · JuliaLang/Pkg.jl · GitHub ) which will be adres…

Thanks a lot! Good to know that it would be addressed in Julia 1.0.1!

I don’t think try catch is a good idea, I mean, I’ll avoid using it if there is any other way to know if a package is intalled,

There is a recent issue Pkg.installed opened 11:06AM - 24 Aug 18 UTC (UTC) closed 04:32AM - 27 Nov 18 UTC (UTC) [sherrinm] sherrinm …

Hi, I am confused with Pkg.installed. I understand the function is no more existing in v1.0 but I get the list of installed packages when I ask Pkg.installed(). However, when I ask for a specific package like Pkg.installed(“Colors”), then I get an error. **julia>** Pkg.installed("Colors") **ERR…

Pkg.installed() returns a Dict, it does not take arguments. So if you want to check for a specific package, use haskey. For example: haskey(Pkg.installed(), "Colors")

How to test if package is installed

General Usage

Ralf_Dietrich February 13, 2023, 10:00am 24

This here helps me alot: How to use Pkg.dependencies() instead of Pkg.installed() - #19 by Ralf_Dietrich

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How to test if package is installed

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