Project-local requires in Crystal

require.cr

# Experiment with macros to allow for project-local requires
# https://forum.crystal-lang.org/t/project-relative-require/4617

{% begin %}
  ROOT = "{{system("pwd").strip.id}}"
{% end %}
macro spec(file)
  macro load_spec
    \{% path = __DIR__.gsub(%r{\A{{ROOT.id}}}, "").gsub(%r{[^/]+}, "..").id %}
    require "\{{path[1..]}}/spec/{{file.id}}"
  end
  load_spec
end

macro src(file)
  macro load_src
    \{% path = __DIR__.gsub(%r{\A{{ROOT.id}}}, "").gsub(%r{[^/]+}, "..").id %}
    require "\{{path[1..]}}/src/{{file.id}}"
  end
  load_src
end

spec-queries-user_query_spec.cr

# Load spec_helper to ensure the macro is loaded
require "../spec_helper"

spec "factories/user"
src "queries/user_query"

describe UserQuery do
  # ...
end

spec_helper.cr

require "../src/config/require"

# Macro is loaded downstream from environment configuration
src "config/env"

src-queries-user_query.cr

src "queries/query"
src "models/user"

struct UserQuery < Query(User)
  # ...
end