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|
module Git
# object that holds the last X commits on given branch
class Diff
include Enumerable
def initialize(base, from = nil, to = nil)
@base = base
@from = from && from.to_s
@to = to && to.to_s
@path = nil
@full_diff = nil
@full_diff_files = nil
@stats = nil
end
attr_reader :from, :to
def name_status
cache_name_status
end
def path(path)
@path = path
return self
end
def size
cache_stats
@stats[:total][:files]
end
def lines
cache_stats
@stats[:total][:lines]
end
def deletions
cache_stats
@stats[:total][:deletions]
end
def insertions
cache_stats
@stats[:total][:insertions]
end
def stats
cache_stats
@stats
end
# if file is provided and is writable, it will write the patch into the file
def patch(file = nil)
cache_full
@full_diff
end
alias_method :to_s, :patch
# enumerable methods
def [](key)
process_full
@full_diff_files.assoc(key)[1]
end
def each(&block) # :yields: each Git::DiffFile in turn
process_full
@full_diff_files.map { |file| file[1] }.each(&block)
end
class DiffFile
attr_accessor :patch, :path, :mode, :src, :dst, :type
@base = nil
NIL_BLOB_REGEXP = /\A0{4,40}\z/.freeze
def initialize(base, hash)
@base = base
@patch = hash[:patch]
@path = hash[:path]
@mode = hash[:mode]
@src = hash[:src]
@dst = hash[:dst]
@type = hash[:type]
@binary = hash[:binary]
end
def binary?
!!@binary
end
def blob(type = :dst)
if type == :src && !NIL_BLOB_REGEXP.match(@src)
@base.object(@src)
elsif !NIL_BLOB_REGEXP.match(@dst)
@base.object(@dst)
end
end
end
private
def cache_full
@full_diff ||= @base.lib.diff_full(@from, @to, {:path_limiter => @path})
end
def process_full
return if @full_diff_files
cache_full
@full_diff_files = process_full_diff
end
def cache_stats
@stats ||= @base.lib.diff_stats(@from, @to, {:path_limiter => @path})
end
def cache_name_status
@name_status ||= @base.lib.diff_name_status(@from, @to, {:path => @path})
end
# break up @diff_full
def process_full_diff
defaults = {
:mode => '',
:src => '',
:dst => '',
:type => 'modified'
}
final = {}
current_file = nil
@full_diff.split("\n").each do |line|
if m = %r{\Adiff --git ("?)a/(.+?)\1 ("?)b/(.+?)\3\z}.match(line)
current_file = Git::EscapedPath.new(m[2]).unescape
final[current_file] = defaults.merge({:patch => line, :path => current_file})
else
if m = /^index ([0-9a-f]{4,40})\.\.([0-9a-f]{4,40})( ......)*/.match(line)
final[current_file][:src] = m[1]
final[current_file][:dst] = m[2]
final[current_file][:mode] = m[3].strip if m[3]
end
if m = /^([[:alpha:]]*?) file mode (......)/.match(line)
final[current_file][:type] = m[1]
final[current_file][:mode] = m[2]
end
if m = /^Binary files /.match(line)
final[current_file][:binary] = true
end
final[current_file][:patch] << "\n" + line
end
end
final.map { |e| [e[0], DiffFile.new(@base, e[1])] }
end
end
end
|
