mirror of
https://github.com/Homebrew/brew.git
synced 2025-07-14 16:09:03 +08:00
93 lines
3.5 KiB
Ruby
93 lines
3.5 KiB
Ruby
# typed: true
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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 {Cpan} strategy identifies versions of software at
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# cpan.metacpan.org by checking directory listing pages.
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#
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# CPAN URLs take the following formats:
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#
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# * `https://cpan.metacpan.org/authors/id/H/HO/HOMEBREW/Brew-v1.2.3.tar.gz`
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# * `https://cpan.metacpan.org/authors/id/H/HO/HOMEBREW/brew/brew-v1.2.3.tar.gz`
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#
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# In these examples, `HOMEBREW` is the author name and the preceding `H`
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# and `HO` directories correspond to the first letter(s). Some authors
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# also store files in subdirectories, as in the second example above.
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#
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# @api public
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class Cpan
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NICE_NAME = "CPAN"
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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?://cpan\.metacpan\.org
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(?<path>/authors/id(?:/[^/]+){3,}/) # Path before the filename
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(?<prefix>[^/]+) # Filename text before the version
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-v?\d+(?:\.\d+)* # The numeric version
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(?<suffix>[^/]+) # Filename text after the version
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}ix
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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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# Extracts information from a provided URL and uses it to generate
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# various input values used by the strategy to check for new versions.
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# Some of these values act as defaults and can be overridden in a
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# `livecheck` block.
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#
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# @param url [String] the URL used to generate values
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# @return [Hash]
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sig { params(url: String).returns(T::Hash[Symbol, T.untyped]) }
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def self.generate_input_values(url)
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values = {}
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match = url.match(URL_MATCH_REGEX)
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return values if match.blank?
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# The directory listing page where the archive files are found
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values[:url] = "https://cpan.metacpan.org#{match[:path]}"
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regex_prefix = Regexp.escape(T.must(match[:prefix])).gsub("\\-", "-")
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# Use `\.t` instead of specific tarball extensions (e.g. .tar.gz)
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suffix = T.must(match[:suffix]).sub(Strategy::TARBALL_EXTENSION_REGEX, ".t")
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regex_suffix = Regexp.escape(suffix).gsub("\\-", "-")
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# Example regex: `/href=.*?Brew[._-]v?(\d+(?:\.\d+)*)\.t/i`
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values[:regex] = /href=.*?#{regex_prefix}[._-]v?(\d+(?:\.\d+)*)#{regex_suffix}/i
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values
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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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unused: T.nilable(T::Hash[Symbol, T.untyped]),
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block: T.nilable(Proc),
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).returns(T::Hash[Symbol, T.untyped])
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}
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def self.find_versions(url:, regex: nil, **unused, &block)
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generated = generate_input_values(url)
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PageMatch.find_versions(url: generated[:url], regex: regex || generated[:regex], **unused, &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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