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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,168 @@ | ||
| module Jekyll | ||
| module Tags | ||
| class IncludeAbsoluteTagError < StandardError | ||
| attr_accessor :path | ||
|
|
||
| def initialize(msg, path) | ||
| super(msg) | ||
| @path = path | ||
| end | ||
| end | ||
|
|
||
| class IncludeAbsoluteTag < Liquid::Tag | ||
| VALID_SYNTAX = %r! | ||
| ([\w-]+)\s*=\s* | ||
| (?:"([^"\\]*(?:\\.[^"\\]*)*)"|'([^'\\]*(?:\\.[^'\\]*)*)'|([\w\.-]+)) | ||
| !x | ||
| VARIABLE_SYNTAX = %r! | ||
| (?<variable>[^{]*(\{\{\s*[\w\-\.]+\s*(\|.*)?\}\}[^\s{}]*)+) | ||
| (?<params>.*) | ||
| !mx | ||
|
|
||
| FULL_VALID_SYNTAX = %r!\A\s*(?:#{VALID_SYNTAX}(?=\s|\z)\s*)*\z! | ||
| VALID_FILENAME_CHARS = %r!^[\w/\.-]+$! | ||
|
|
||
| def initialize(tag_name, markup, tokens) | ||
| super | ||
| matched = markup.strip.match(VARIABLE_SYNTAX) | ||
| if matched | ||
| @file = matched["variable"].strip | ||
| @params = matched["params"].strip | ||
| else | ||
| @file, @params = markup.strip.split(%r!\s+!, 2) | ||
| end | ||
| validate_params if @params | ||
| @tag_name = tag_name | ||
| end | ||
|
|
||
| def syntax_example | ||
| "{% #{@tag_name} 'file.ext' param='value' param2='value' %}" | ||
| end | ||
|
|
||
| def parse_params(context) | ||
| params = {} | ||
| markup = @params | ||
|
|
||
| while (match = VALID_SYNTAX.match(markup)) | ||
| markup = markup[match.end(0)..-1] | ||
|
|
||
| value = if match[2] | ||
| match[2].gsub(%r!\\"!, '"') | ||
| elsif match[3] | ||
| match[3].gsub(%r!\\'!, "'") | ||
| elsif match[4] | ||
| context[match[4]] | ||
| end | ||
|
|
||
| params[match[1]] = value | ||
| end | ||
| params | ||
| end | ||
|
|
||
| def validate_file_name(file) | ||
| if file !~ VALID_FILENAME_CHARS | ||
| raise ArgumentError, <<-MSG | ||
| Invalid syntax for include tag. File contains invalid characters or sequences: | ||
| #{file} | ||
| Valid syntax: | ||
| #{syntax_example} | ||
| MSG | ||
| end | ||
| end | ||
|
|
||
| def validate_params | ||
| unless @params =~ FULL_VALID_SYNTAX | ||
| raise ArgumentError, <<-MSG | ||
| Invalid syntax for include tag: | ||
| #{@params} | ||
| Valid syntax: | ||
| #{syntax_example} | ||
| MSG | ||
| end | ||
| end | ||
|
|
||
| # Grab file read opts in the context | ||
| def file_read_opts(context) | ||
| context.registers[:site].file_read_opts | ||
| end | ||
|
|
||
| # Render the variable if required | ||
| def render_variable(context) | ||
| if @file =~ VARIABLE_SYNTAX | ||
| partial = context.registers[:site] | ||
| .liquid_renderer | ||
| .file("(variable)") | ||
| .parse(@file) | ||
| partial.render!(context) | ||
| end | ||
| end | ||
|
|
||
| def render(context) | ||
| site = context.registers[:site] | ||
|
|
||
| file = render_variable(context) || @file | ||
| # strip leading and trailing quote's | ||
| file = file.gsub!(/\A'|'\Z/, '') | ||
| validate_file_name(file) | ||
|
|
||
| source = File.expand_path(context.registers[:site].config['source']).freeze | ||
| path = File.join(source, file) | ||
| return unless path | ||
|
|
||
| partial = Liquid::Template.parse(read_file(path, context)) | ||
|
|
||
| context.stack do | ||
| context["include"] = parse_params(context) if @params | ||
| begin | ||
| partial.render!(context) | ||
| rescue Liquid::Error => e | ||
| e.template_name = path | ||
| e.markup_context = "included " if e.markup_context.nil? | ||
| raise e | ||
| end | ||
| end | ||
| end | ||
|
|
||
| def valid_include_file?(path, dir, safe) | ||
| !outside_site_source?(path, dir, safe) && File.file?(path) | ||
| end | ||
|
|
||
| def outside_site_source?(path, dir, safe) | ||
| safe && !realpath_prefixed_with?(path, dir) | ||
| end | ||
|
|
||
| def realpath_prefixed_with?(path, dir) | ||
| File.exist?(path) && File.realpath(path).start_with?(dir) | ||
| rescue StandardError | ||
| false | ||
| end | ||
|
|
||
| # This method allows to modify the file content by inheriting from the class. | ||
| def read_file(file, context) | ||
| File.read(file, **file_read_opts(context)) | ||
| end | ||
|
|
||
| private | ||
|
|
||
| def could_not_locate_message(file, includes_dirs, safe) | ||
| message = "Could not locate the included file '#{file}' in any of "\ | ||
| "#{includes_dirs}. Ensure it exists in one of those directories and" | ||
| message + if safe | ||
| " is not a symlink as those are not allowed in safe mode." | ||
| else | ||
| ", if it is a symlink, does not point outside your site source." | ||
| end | ||
| end | ||
| end | ||
| end | ||
| end | ||
|
|
||
| Liquid::Template.register_tag("include_absolute", Jekyll::Tags::IncludeAbsoluteTag) |
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