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require "formula"
class FormulaVersions
IGNORED_EXCEPTIONS = [
ArgumentError, NameError, SyntaxError, TypeError,
FormulaSpecificationError, FormulaValidationError,
ErrorDuringExecution, LoadError,
]
attr_reader :name, :repository, :entry_name
def initialize(formula)
@name = formula.name
@repository = formula.tap? ? HOMEBREW_LIBRARY.join("Taps", formula.tap) : HOMEBREW_REPOSITORY
@entry_name = formula.path.relative_path_from(repository).to_s
end
def rev_list(branch="HEAD")
repository.cd do
Utils.popen_read("git", "rev-list", "--abbrev-commit", "--remove-empty", branch, "--", entry_name) do |io|
yield io.readline.chomp until io.eof?
end
end
end
def file_contents_at_revision(rev)
repository.cd { Utils.popen_read("git", "cat-file", "blob", "#{rev}:#{entry_name}") }
end
def formula_at_revision(rev)
FileUtils.mktemp(name) do
path = Pathname.pwd.join("#{name}.rb")
path.write file_contents_at_revision(rev)
old_const = Formulary.unload_formula(name)
begin
nostdout { yield Formulary.factory(path.to_s) }
rescue *IGNORED_EXCEPTIONS => e
# We rescue these so that we can skip bad versions and
# continue walking the history
ohai "#{e} in #{name} at revision #{rev}", e.backtrace if ARGV.debug?
rescue FormulaUnavailableError
# Suppress this error
ensure
Formulary.restore_formula(name, old_const)
end
end
end
def bottle_version_map(branch="HEAD")
map = Hash.new { |h, k| h[k] = [] }
rev_list(branch) do |rev|
formula_at_revision(rev) do |f|
bottle = f.bottle_specification
unless bottle.checksums.empty?
map[f.pkg_version] << bottle.revision
end
end
end
map
end
end
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