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91 lines
3.5 KiB
Ruby
91 lines
3.5 KiB
Ruby
# typed: false
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# frozen_string_literal: true
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module Homebrew
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module Livecheck
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module Strategy
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# The {Sourceforge} strategy identifies versions of software at
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# sourceforge.net by checking a project's RSS feed.
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#
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# SourceForge URLs take a few different formats:
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#
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# * `https://downloads.sourceforge.net/project/example/example-1.2.3.tar.gz`
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# * `https://svn.code.sf.net/p/example/code/trunk`
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# * `:pserver:anonymous:@example.cvs.sourceforge.net:/cvsroot/example`
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#
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# The RSS feed for a project contains the most recent release archives
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# and while this is fine for most projects, this approach has some
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# shortcomings. Some project releases involve so many files that the one
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# we're interested in isn't present in the feed content. Some projects
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# contain additional software and the archive we're interested in is
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# pushed out of the feed (especially if it hasn't been updated recently).
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#
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# Usually we address this situation by adding a `livecheck` block to
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# the formula/cask that checks the page for the relevant directory in the
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# project instead. In this situation, it's necessary to use
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# `strategy :page_match` to prevent the {Sourceforge} stratgy from
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# being used.
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#
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# The default regex matches within `url` attributes in the RSS feed
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# and identifies versions within directory names or filenames.
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#
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# @api public
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class Sourceforge
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extend T::Sig
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NICE_NAME = "SourceForge"
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# The `Regexp` used to determine if the strategy applies to the URL.
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URL_MATCH_REGEX = %r{
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^https?://(?:[^/]+?\.)*(?:sourceforge|sf)\.net
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(?:/projects?/(?<project_name>[^/]+)/
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|/p/(?<project_name>[^/]+)/
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|(?::/cvsroot)?/(?<project_name>[^/]+))
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}ix.freeze
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# Whether the strategy can be applied to the provided URL.
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#
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# @param url [String] the URL to match against
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# @return [Boolean]
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sig { params(url: String).returns(T::Boolean) }
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def self.match?(url)
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URL_MATCH_REGEX.match?(url)
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end
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# Generates a URL and regex (if one isn't provided) and passes them
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# to {PageMatch.find_versions} to identify versions in the content.
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#
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# @param url [String] the URL of the content to check
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# @param regex [Regexp] a regex used for matching versions in content
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# @return [Hash]
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sig {
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params(
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url: String,
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regex: T.nilable(Regexp),
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cask: T.nilable(Cask::Cask),
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block: T.nilable(
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T.proc.params(arg0: String, arg1: Regexp).returns(T.any(String, T::Array[String], NilClass)),
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),
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).returns(T::Hash[Symbol, T.untyped])
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}
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def self.find_versions(url, regex, cask: nil, &block)
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match = url.match(URL_MATCH_REGEX)
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page_url = if url.match?(%r{/rss(?:/?$|\?)})
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url
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else
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"https://sourceforge.net/projects/#{match[:project_name]}/rss"
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end
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# It may be possible to improve the default regex but there's quite a
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# bit of variation between projects and it can be challenging to
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# create something that works for most URLs.
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regex ||= %r{url=.*?/#{Regexp.escape(match[:project_name])}/files/.*?[-_/](\d+(?:[-.]\d+)+)[-_/%.]}i
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PageMatch.find_versions(page_url, regex, cask: cask, &block)
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end
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end
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end
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end
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end
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