Julia Local Packaging

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So I wanted to move all my common Julia code to a support dir. My filesystem has for 30+ years contained:

$HOME/
    Code/
        CodeC/
            foo/
                src/
                    bar.c
        CodeJava/
            foo/
                src/
                    com/
                        mdh/
                            bar/
                                Quux.java
        et fucking cetera

Build scripts for most languages expect something very like this, and it's easy to import one package's source into another, so I could put common code in a "Marklib" project, and get work done.

Making this happen in Julia was a lot more difficult. With a little help from Slack I made sense of the terrible package documentation for Julia and the incomprehensible errors, and wrote a script juliaMakePackage.zsh:

#!/bin/zsh
if [[ $# -ne 1 ]]; then
    echo "Usage: juliaMakePackage.zsh NAME"
    exit 1
fi
name=$1
devdir=$HOME/Code/CodeJulia
cd $devdir
julia -E "using Pkg; Pkg.activate(\".\"); Pkg.generate(\"${name}\")"
cd $name
git init
git add .
git commit -m "Initial commit"
cd ..
julia -E "using Pkg; Pkg.develop(PackageSpec(url=\"${devdir}/${name}\"))"

And then added the main dir and all packages I make to ~/.julia/config/startup.jl:

# startup.jl

push!(LOAD_PATH, pwd())
push!(LOAD_PATH, "$(homedir())/Code/CodeJulia")
push!(LOAD_PATH, "$(homedir())/Code/CodeJulia/Marklib")

println("READY $(pwd())")

Now finally I can:

% julia
READY /Users/mdh
julia> using Marklib
julia> Marklib.greet()
Hello World!
julia> 

And from there start putting in my libs. Each one needs a package and a startup entry; I may have to automate that by walking my code dir. Waste of several hours figuring that out.

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  • mdhughes