1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
require 'uri'
module Banzai
module Filter
# HTML filter that "fixes" relative links to files in a repository.
#
# Context options:
# :commit
# :project
# :project_wiki
# :ref
# :requested_path
class RelativeLinkFilter < HTML::Pipeline::Filter
def call
return doc unless linkable_files?
@uri_types = {}
doc.search('a:not(.gfm)').each do |el|
process_link_attr el.attribute('href')
end
doc.search('img').each do |el|
process_link_attr el.attribute('src')
end
doc
end
protected
def linkable_files?
context[:project_wiki].nil? && repository.try(:exists?) && !repository.empty?
end
def process_link_attr(html_attr)
return if html_attr.blank?
uri = URI(html_attr.value)
if uri.relative? && uri.path.present?
html_attr.value = rebuild_relative_uri(uri).to_s
end
rescue URI::Error
# noop
end
def rebuild_relative_uri(uri)
file_path = relative_file_path(uri.path)
uri.path = [
relative_url_root,
context[:project].path_with_namespace,
uri_type(file_path),
ref || context[:project].default_branch, # if no ref exists, point to the default branch
file_path
].compact.join('/').squeeze('/').chomp('/')
uri
end
def relative_file_path(path)
nested_path = build_relative_path(path, context[:requested_path])
file_exists?(nested_path) ? nested_path : path
end
# Convert a relative path into its correct location based on the currently
# requested path
#
# path - Relative path String
# request_path - Currently-requested path String
#
# Examples:
#
# # File in the same directory as the current path
# build_relative_path("users.md", "doc/api/README.md")
# # => "doc/api/users.md"
#
# # File in the same directory, which is also the current path
# build_relative_path("users.md", "doc/api")
# # => "doc/api/users.md"
#
# # Going up one level to a different directory
# build_relative_path("../update/7.14-to-8.0.md", "doc/api/README.md")
# # => "doc/update/7.14-to-8.0.md"
#
# Returns a String
def build_relative_path(path, request_path)
return request_path if path.empty?
return path unless request_path
parts = request_path.split('/')
parts.pop if uri_type(request_path) != :tree
while path.start_with?('../')
parts.pop
path.sub!('../', '')
end
parts.push(path).join('/')
end
def file_exists?(path)
path.present? && !!uri_type(path)
end
def uri_type(path)
@uri_types[path] ||= begin
unescaped_path = Addressable::URI.unescape(path)
current_commit.uri_type(unescaped_path)
end
end
def current_commit
@current_commit ||= context[:commit] ||
ref ? repository.commit(ref) : repository.head_commit
end
def relative_url_root
Gitlab.config.gitlab.relative_url_root.presence || '/'
end
def ref
context[:ref]
end
def repository
@repository ||= context[:project].try(:repository)
end
end
end
end
|