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# A simple differ using svn. Handles externals.
class Differ < Hash
include Rake::DSL
def initialize path
@path = path
super 0
end
def count key, value
self[key] += value
value
end
FORMAT = ' %-30s %8d lines, %3d changes in %2d files'
def scan(path = @path)
Dir.chdir path do
diff_file_name = 'diff'
if File.directory? 'diff'
diff_file_name = 'diff.diff'
end
system "svn diff > #{diff_file_name}"
if File.size? diff_file_name
puts FORMAT %
[
path,
count(:LOC, `wc -l #{diff_file_name}`.to_i),
count(:changes, `grep ^@@ #{diff_file_name} | wc -l`.to_i),
count(:files, `grep ^Index #{diff_file_name} | wc -l`.to_i),
]
else
rm diff_file_name
end
end
end
def scan_with_externals(path = @path)
scan path
`svn status`.scan(/^X\s*(.*)/) do |external,|
scan external
end
end
def clean(path = @path)
Dir.chdir path do
rm 'diff' if File.file? 'diff'
rm 'diff.diff' if File.file? 'diff.diff'
end
end
def clean_with_externals(path = @path)
clean path
`svn status`.scan(/^X\s*(.*)/) do |external,|
clean external
end
end
def differences?
self[:LOC] > 0
end
def inspect
FORMAT %
[ 'Total', self[:LOC], self[:changes], self[:files] ]
end
end
namespace :diff do
desc 'Make a diff and print a summary'
task :summary do
differ = Differ.new '.'
differ.scan_with_externals
if differ.empty?
puts 'No differences found.'
else
p differ
end
end
desc 'Remove all diffs'
task :clean do
differ = Differ.new '.'
differ.clean_with_externals
end
end
desc 'Make a diff and print a summary'
task :diff => 'diff:summary'
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