julia packages -> nixpkgs

clone_all_packages.sh

wd='julia-nix-workdir'
mkdir -p $wd

cd $wd
git clone --depth=1 [email protected]:JuliaLang/METADATA.jl.git

while read url; do
  git clone --depth=1 $url
done < $(find ./METADATA.jl/ -name url -exec cat '{}' \; -exec echo \; |sort -u)

findfunc.jl

# https://stackoverflow.com/questions/46364922/how-to-parse-multiline-string-in-julia
function parseall(str)
    pos = start(str)
    exs = []
    while !done(str, pos)
        ex, pos = parse(str, pos) # returns next starting point as well as expr
        ex.head == :toplevel ? append!(exs, ex.args) : push!(exs, ex) #see comments for info
    end
    if length(exs) == 0
        throw(ParseError("end of input"))
    elseif length(exs) == 1
        return exs[1]
    else
        return Expr(:block, exs...) # convert the array of expressions
                                    # back to a single expression
    end
end
# Meta.show_sexpr(expr)
parseallfile(file) = parseall(readstring(file))

findfunc(any, func::Symbol) = false
function findfunc(s::Symbol, func::Symbol)
    if s == func
        return true
    end
    false
end

function findfunc(expr::Expr, func::Symbol)
    for exp in expr.args
        if findfunc(exp, func)
            println(expr.args[2]) # better to get aliases
        end
    end
    false
end

parse_build.sh

#example: parse_build.sh "/tmp/julia-nix-workdir/Gtk.jl/deps/build.jl"
julia -e "include(\"/tmp/parseall.jl\"); findfunc(parseallfile(\"$1\"),:library_dependency)"
#example result:
# glib gobject gtk gdk gdk_pixbuf gio 

# This can be passed to `nix-locate` or something