mirror of
https://github.com/Homebrew/brew.git
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100 lines
3.7 KiB
Ruby
100 lines
3.7 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 {Pypi} strategy identifies versions of software at pypi.org by
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# checking project pages for archive files.
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#
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# PyPI URLs have a standard format but the hexadecimal text between
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# `/packages/` and the filename varies:
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#
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# * `https://files.pythonhosted.org/packages/<hex>/<hex>/<long_hex>/example-1.2.3.tar.gz`
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#
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# As such, the default regex only targets the filename at the end of the
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# URL.
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#
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# @api public
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class Pypi
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NICE_NAME = "PyPI"
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# The `Regexp` used to extract the package name and suffix (e.g. file
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# extension) from the URL basename.
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FILENAME_REGEX = /
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(?<package_name>.+)- # The package name followed by a hyphen
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.*? # The version string
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(?<suffix>\.tar\.[a-z0-9]+|\.[a-z0-9]+)$ # Filename extension
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/ix
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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?://files\.pythonhosted\.org
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/packages
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(?:/[^/]+)+ # The hexadecimal paths before the filename
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/#{FILENAME_REGEX.source.strip} # The filename
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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 = File.basename(url).match(FILENAME_REGEX)
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return values if match.blank?
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# It's not technically necessary to have the `#files` fragment at the
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# end of the URL but it makes the debug output a bit more useful.
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values[:url] = "https://pypi.org/project/#{T.must(match[:package_name]).gsub(/%20|_/, "-")}/#files"
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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: `%r{href=.*?/packages.*?/example[._-]v?(\d+(?:\.\d+)*(?:[._-]post\d+)?)\.t}i`
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regex_name = Regexp.escape(T.must(match[:package_name])).gsub("\\-", "-")
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values[:regex] =
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%r{href=.*?/packages.*?/#{regex_name}[._-]v?(\d+(?:\.\d+)*(?:[._-]post\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.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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