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88 lines
3.1 KiB
Ruby
88 lines
3.1 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 {Launchpad} strategy identifies versions of software at
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# launchpad.net by checking the main page for a project.
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#
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# Launchpad URLs take a variety of formats but all the current formats
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# contain the project name as the first part of the URL path:
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#
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# * `https://launchpad.net/example/1.2/1.2.3/+download/example-1.2.3.tar.gz`
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# * `https://launchpad.net/example/trunk/1.2.3/+download/example-1.2.3.tar.gz`
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# * `https://code.launchpad.net/example/1.2/1.2.3/+download/example-1.2.3.tar.gz`
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#
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# The default regex identifies the latest version within an HTML element
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# found on the main page for a project:
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#
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# <pre><div class="version">
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# Latest version is 1.2.3
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# </div></pre>
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#
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# @api public
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class Launchpad
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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?://(?:[^/]+?\.)*launchpad\.net
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/(?<project_name>[^/]+) # The Launchpad project name
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}ix
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# The default regex used to identify the latest version when a regex
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# isn't provided.
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DEFAULT_REGEX = %r{class="[^"]*version[^"]*"[^>]*>\s*Latest version is (.+)\s*</}
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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 main page for the project on Launchpad
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values[:url] = "https://launchpad.net/#{match[:project_name]}/"
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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: 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: DEFAULT_REGEX, **unused, &block)
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generated = generate_input_values(url)
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PageMatch.find_versions(url: generated[:url], regex: 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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