custom-replacements2.jl

using Documenter
using Documenter: Selectors, Expanders, Markdown
using Documenter.Markdown: Link, Paragraph

struct DatabaseLookup <: Expanders.ExpanderPipeline end

Selectors.order(::Type{DatabaseLookup}) = 0.5
Selectors.matcher(::Type{DatabaseLookup}, node, page, doc) = false
match_kw(x::String) = ismatch(r"\@library\[example\] \"(.*)\"", x)
match_kw(x::Paragraph) = any(match_kw, x.content)
match_kw(x::Any) = false
Selectors.matcher(::Type{DatabaseLookup}, node, page, doc) = match_kw(node)

function Selectors.runner(::Type{DatabaseLookup}, x, page, doc)
    matched = nothing
    for elem in x.content
        if isa(elem, AbstractString)
            matched = match(r"\@library\[example\] \"(.*)\"", elem)
            matched != nothing && break
        end
    end
    matched == nothing && error("No match: $x")
    database_key = matched[1]
    page.mapping[x] = Markdown.Code("julia", look_up_source(database_key))
end

makedocs()