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98 lines
3.6 KiB
Ruby
98 lines
3.6 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 {Gnu} strategy identifies versions of software at gnu.org by
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# checking directory listing pages.
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#
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# GNU URLs use a variety of formats:
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#
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# * Archive file URLs:
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# * `https://ftp.gnu.org/gnu/example/example-1.2.3.tar.gz`
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# * `https://ftp.gnu.org/gnu/example/1.2.3/example-1.2.3.tar.gz`
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# * Homepage URLs:
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# * `https://www.gnu.org/software/example/`
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# * `https://example.gnu.org`
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#
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# There are other URL formats that this strategy currently doesn't
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# support:
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#
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# * `https://ftp.gnu.org/non-gnu/example/source/feature/1.2.3/example-1.2.3.tar.gz`
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# * `https://savannah.nongnu.org/download/example/example-1.2.3.tar.gz`
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# * `https://download.savannah.gnu.org/releases/example/example-1.2.3.tar.gz`
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# * `https://download.savannah.nongnu.org/releases/example/example-1.2.3.tar.gz`
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#
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# The default regex identifies versions in archive files found in `href`
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# attributes.
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#
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# @api public
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class Gnu
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NICE_NAME = "GNU"
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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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//.+?\.gnu\.org$|
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gnu\.org/(?:gnu|software)/
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}ix.freeze
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# The `Regexp` used to parse the project name from the provided URL.
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# The strategy uses this information to create the URL to check and
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# the default regex.
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PROJECT_NAME_REGEXES = [
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%r{/(?:gnu|software)/(?<project_name>.+?)/}i,
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%r{//(?<project_name>.+?)\.gnu\.org(?:/)?$}i,
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].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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def self.match?(url)
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URL_MATCH_REGEX.match?(url) && url.exclude?("savannah.")
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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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def self.find_versions(url, regex = nil)
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project_names = PROJECT_NAME_REGEXES.map do |project_name_regex|
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m = url.match(project_name_regex)
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m["project_name"] if m
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end.compact
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return { matches: {}, regex: regex, url: url } if project_names.blank?
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if project_names.length > 1
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odebug <<~EOS
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Multiple project names found: #{match_list}
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EOS
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end
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project_name = project_names.first
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# The directory listing page for the project's files
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page_url = "http://ftp.gnu.org/gnu/#{project_name}/?C=M&O=D"
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# The default regex consists of the following parts:
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# * `href=.*?`: restricts matching to URLs in `href` attributes
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# * The project name
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# * `[._-]`: the generic delimiter between project name and version
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# * `v?(\d+(?:\.\d+)*)`: the numeric version
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# * `(?:\.[a-z]+|/)`: the file extension (a trailing delimiter)
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#
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# Example regex: `%r{href=.*?example[._-]v?(\d+(?:\.\d+)*)(?:\.[a-z]+|/)}i`
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regex ||= %r{href=.*?#{project_name}[._-]v?(\d+(?:\.\d+)*)(?:\.[a-z]+|/)}i
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Homebrew::Livecheck::Strategy::PageMatch.find_versions(page_url, regex)
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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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