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require "formula"
class FormulaVersions
IGNORED_EXCEPTIONS = [
ArgumentError, NameError, SyntaxError, TypeError,
FormulaSpecificationError, FormulaValidationError,
]
attr_reader :f
def initialize(f)
@f = f
end
def repository
@repository ||= if f.path.to_s =~ HOMEBREW_TAP_DIR_REGEX
HOMEBREW_REPOSITORY/"Library/Taps/#$1/#$2"
else
HOMEBREW_REPOSITORY
end
end
def entry_name
@entry_name ||= f.path.relative_path_from(repository).to_s
end
def each
versions = Set.new
rev_list do |rev|
version = version_at_revision(rev)
next if version.nil?
yield version, rev if versions.add?(version)
end
end
def repository_path
Pathname.pwd == repository ? entry_name : f.path
end
def rev_list(branch="HEAD")
repository.cd do
IO.popen("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 { `git cat-file blob #{rev}:#{entry_name}` }
end
def version_at_revision(rev)
formula_at_revision(rev) { |f| f.version }
end
def formula_at_revision rev, &block
FileUtils.mktemp(f.name) do
path = Pathname.pwd.join("#{f.name}.rb")
path.write file_contents_at_revision(rev)
begin
old_const = Formulary.unload_formula(f.name)
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 #{f.name} at revision #{rev}", e.backtrace if ARGV.debug?
rescue FormulaUnavailableError
# Suppress this error
ensure
Formulary.restore_formula(f.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.stable.bottle_specification
unless bottle.checksums.empty?
map[f.pkg_version] << bottle.revision
end
end
end
map
end
end
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