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# frozen_string_literal: true
require 'asciidoctor/include_ext/include_processor'
module Gitlab
module Asciidoc
# Asciidoctor extension for processing includes (macro include::[]) within
# documents inside the same repository.
class IncludeProcessor < Asciidoctor::IncludeExt::IncludeProcessor
extend ::Gitlab::Utils::Override
def initialize(context)
super(logger: Gitlab::AppLogger)
@context = context
@repository = context[:repository] || context[:project].try(:repository)
@max_includes = context[:max_includes].to_i
@included = []
# Note: Asciidoctor calls #freeze on extensions, so we can't set new
# instance variables after initialization.
@cache = {
uri_types: {}
}
end
protected
override :include_allowed?
def include_allowed?(target, reader)
doc = reader.document
max_include_depth = doc.attributes.fetch('max-include-depth').to_i
return false if max_include_depth < 1
return false if target_http?(target)
return false if included.size >= max_includes
true
end
override :resolve_target_path
def resolve_target_path(target, reader)
return unless repository.try(:exists?)
base_path = reader.include_stack.empty? ? requested_path : reader.file
path = resolve_relative_path(target, base_path)
path if Gitlab::Git::Blob.find(repository, ref, path)
end
override :read_lines
def read_lines(filename, selector)
blob = read_blob(ref, filename)
if selector
blob.data.each_line.select.with_index(1, &selector)
else
blob.data
end
end
override :unresolved_include!
def unresolved_include!(target, reader)
reader.unshift_line("*[ERROR: include::#{target}[] - unresolved directive]*")
end
private
attr_reader :context, :repository, :cache, :max_includes, :included
# Gets a Blob at a path for a specific revision.
# This method will check that the Blob exists and contains readable text.
#
# revision - The String SHA1.
# path - The String file path.
#
# Returns a Blob
def read_blob(ref, filename)
blob = repository&.blob_at(ref, filename)
raise 'Blob not found' unless blob
raise 'File is not readable' unless blob.readable_text?
included << filename
blob
end
# Resolves the given relative path of file in repository into canonical
# path based on the specified base_path.
#
# Examples:
#
# # File in the same directory as the current path
# resolve_relative_path("users.adoc", "doc/api/README.adoc")
# # => "doc/api/users.adoc"
#
# # File in the same directory, which is also the current path
# resolve_relative_path("users.adoc", "doc/api")
# # => "doc/api/users.adoc"
#
# # Going up one level to a different directory
# resolve_relative_path("../update/7.14-to-8.0.adoc", "doc/api/README.adoc")
# # => "doc/update/7.14-to-8.0.adoc"
#
# Returns a String
def resolve_relative_path(path, base_path)
p = Pathname(base_path)
p = p.dirname unless p.extname.empty?
p += path
p.cleanpath.to_s
end
def current_commit
cache[:current_commit] ||= context[:commit] || repository&.commit(ref)
end
def ref
context[:ref] || repository&.root_ref
end
def requested_path
cache[:requested_path] ||= Addressable::URI.unescape(context[:requested_path])
end
def uri_type(path)
cache[:uri_types][path] ||= current_commit&.uri_type(path)
end
end
end
end
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