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class RefreshBrew
REPOSITORY_URL = "http://github.com/mxcl/homebrew.git"
INIT_COMMAND = "git init"
CHECKOUT_COMMAND = "git checkout -q master"
UPDATE_COMMAND = "git pull #{REPOSITORY_URL} master"
REVISION_COMMAND = "git log -l -1 --pretty=format:%H 2> /dev/null"
GIT_UP_TO_DATE = "Already up-to-date."
formula_regexp = 'Library/Formula/(.+?)\.rb'
ADDED_FORMULA = %r{^\s+create mode \d+ #{formula_regexp}$}
UPDATED_FORMULA = %r{^\s+#{formula_regexp}\s}
DELETED_FORMULA = %r{^\s+delete mode \d+ #{formula_regexp}$}
example_regexp = 'Library/Contributions/examples/([^.\s]+).*'
ADDED_EXAMPLE = %r{^\s+create mode \d+ #{example_regexp}$}
UPDATED_EXAMPLE = %r{^\s+#{example_regexp}}
DELETED_EXAMPLE = %r{^\s+delete mode \d+ #{example_regexp}$}
attr_reader :added_formulae, :updated_formulae, :deleted_formulae, :initial_revision
attr_reader :added_examples, :updated_examples, :deleted_examples
def initialize
@added_formulae, @updated_formulae, @deleted_formulae = [], [], []
@added_examples, @updated_examples, @deleted_examples = [], [], []
@initial_revision = self.current_revision
end
# Performs an update of the homebrew source. Returns +true+ if a newer
# version was available, +false+ if already up-to-date.
def update_from_masterbrew!
output = ''
HOMEBREW_REPOSITORY.cd do
if File.directory? '.git'
safe_system CHECKOUT_COMMAND
else
safe_system INIT_COMMAND
end
output = execute(UPDATE_COMMAND)
end
output.split("\n").reverse.each do |line|
case line
when ADDED_FORMULA
@added_formulae << $1
when DELETED_FORMULA
@deleted_formulae << $1
when UPDATED_FORMULA
@updated_formulae << $1 unless @added_formulae.include?($1) or @deleted_formulae.include?($1)
when ADDED_EXAMPLE
@added_examples << $1
when DELETED_EXAMPLE
@deleted_examples << $1
when UPDATED_EXAMPLE
@updated_examples << $1 unless @added_examples.include?($1) or @deleted_examples.include?($1)
end
end
@added_formulae.sort!
@updated_formulae.sort!
@deleted_formulae.sort!
@added_examples.sort!
@updated_examples.sort!
@deleted_examples.sort!
output.strip != GIT_UP_TO_DATE
end
def pending_formulae_changes?
!@updated_formulae.empty?
end
def pending_new_formulae?
!@added_formulae.empty?
end
def deleted_formulae?
!@deleted_formulae.empty?
end
def pending_examples_changes?
!@updated_examples.empty?
end
def pending_new_examples?
!@added_examples.empty?
end
def deleted_examples?
!@deleted_examples.empty?
end
def current_revision
HOMEBREW_REPOSITORY.cd { execute(REVISION_COMMAND).strip }
rescue
'TAIL'
end
def report
puts "Updated Homebrew from #{initial_revision[0,8]} to #{current_revision[0,8]}."
## New Formulae
if pending_new_formulae?
ohai "The following formulae are new:"
puts_columns added_formulae
end
## Deleted Formulae
if deleted_formulae?
ohai "The following formulae were removed:"
puts_columns deleted_formulae
end
## Updated Formulae
if pending_formulae_changes?
ohai "The following formulae were updated:"
puts_columns updated_formulae
else
puts "No formulae were updated."
end
## New examples
if pending_new_examples?
ohai "The following external commands are new:"
puts_columns added_examples
end
## Deleted examples
if deleted_examples?
ohai "The following external commands were removed:"
puts_columns deleted_examples
end
## Updated Formulae
if pending_examples_changes?
ohai "The following external commands were updated:"
puts_columns updated_examples
else
puts "No external commands were updated."
end
end
private
def execute(cmd)
out = `#{cmd}`
if $? && !$?.success?
puts out
raise "Failed while executing #{cmd}"
end
ohai(cmd, out) if ARGV.verbose?
out
end
end
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