86 lines
3.2 KiB
Ruby
86 lines
3.2 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 {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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extend T::Sig
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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.freeze
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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.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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unused: T.nilable(T::Hash[Symbol, T.untyped]),
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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: nil, **unused, &block)
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match = File.basename(url).match(FILENAME_REGEX)
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# Use `\.t` instead of specific tarball extensions (e.g. .tar.gz)
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suffix = match[:suffix].sub(/\.t(?:ar\..+|[a-z0-9]+)$/i, "\.t")
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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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page_url = "https://pypi.org/project/#{match[:package_name].gsub(/%20|_/, "-")}/#files"
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# Example regex: `%r{href=.*?/packages.*?/example[._-]v?(\d+(?:\.\d+)*(?:[._-]post\d+)?)\.t}i`
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re_package_name = Regexp.escape(match[:package_name])
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re_suffix = Regexp.escape(suffix)
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regex ||= %r{href=.*?/packages.*?/#{re_package_name}[._-]v?(\d+(?:\.\d+)*(?:[._-]post\d+)?)#{re_suffix}}i
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PageMatch.find_versions(url: page_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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