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module Gitlab
module Markdown
# HTML filter that replaces commit range references with links.
#
# This filter supports cross-project references.
class CommitRangeReferenceFilter < ReferenceFilter
include CrossProjectReference
# Public: Find commit range references in text
#
# CommitRangeReferenceFilter.references_in(text) do |match, commit_range, project_ref|
# "<a href=...>#{commit_range}</a>"
# end
#
# text - String text to search.
#
# Yields the String match, the String commit range, and an optional String
# of the external project reference.
#
# Returns a String replaced with the return of the block.
def self.references_in(text)
text.gsub(COMMIT_RANGE_PATTERN) do |match|
yield match, $~[:commit_range], $~[:project]
end
end
def initialize(*args)
super
@commit_map = {}
end
# Pattern used to extract commit range references from text
#
# The beginning and ending SHA1 sums can be between 6 and 40 hex
# characters, and the range selection can be double- or triple-dot.
#
# This pattern supports cross-project references.
COMMIT_RANGE_PATTERN = /(#{PROJECT_PATTERN}@)?(?<commit_range>\h{6,40}\.{2,3}\h{6,40})/
def call
replace_text_nodes_matching(COMMIT_RANGE_PATTERN) do |content|
commit_range_link_filter(content)
end
end
# Replace commit range references in text with links to compare the commit
# ranges.
#
# text - String text to replace references in.
#
# Returns a String with commit range references replaced with links. All
# links have `gfm` and `gfm-commit_range` class names attached for
# styling.
def commit_range_link_filter(text)
self.class.references_in(text) do |match, commit_range, project_ref|
project = self.project_from_ref(project_ref)
from_id, to_id = split_commit_range(commit_range)
if valid_range?(project, from_id, to_id)
url = url_for_commit_range(project, from_id, to_id)
title = "Commits #{from_id} through #{to_id}"
klass = reference_class(:commit_range)
project_ref += '@' if project_ref
%(<a href="#{url}"
title="#{title}"
class="#{klass}">#{project_ref}#{commit_range}</a>)
else
match
end
end
end
def split_commit_range(range)
from_id, to_id = range.split(/\.{2,3}/, 2)
from_id << "^" if range !~ /\.{3}/
[from_id, to_id]
end
def commit(id)
unless @commit_map[id]
@commit_map[id] = project.commit(id)
end
@commit_map[id]
end
def valid_range?(project, from_id, to_id)
project && project.valid_repo? && commit(from_id) && commit(to_id)
end
def url_for_commit_range(project, from_id, to_id)
h = Rails.application.routes.url_helpers
h.namespace_project_compare_url(project.namespace, project,
from: from_id, to: to_id,
only_path: context[:only_path])
end
end
end
end
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