Class: Git

Inherits:
Object
  • Object
show all
Defined in:
lib/gitstats/git.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, base, ref = 'HEAD', debug = false, cachefile = nil) ⇒ Git

Returns a new instance of Git.



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# File 'lib/gitstats/git.rb', line 6

def initialize(name, base, ref = 'HEAD', debug = false, cachefile = nil)
  @name = name
  @base = base
  @ref = ref
  @debug = debug
  @cachefile = cachefile
end

Instance Attribute Details

#base ⇒ Object (readonly)

Returns the value of attribute base.



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# File 'lib/gitstats/git.rb', line 3

def base
  @base
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/gitstats/git.rb', line 2

def name
  @name
end

#ref ⇒ Object (readonly)

Returns the value of attribute ref.



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# File 'lib/gitstats/git.rb', line 4

def ref
  @ref
end

Instance Method Details

#close_cache ⇒ Object 



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# File 'lib/gitstats/git.rb', line 19

def close_cache
  unless @cache.nil?
    @cache.close
    @cache = nil
  end
end

#get_commits(last = nil, &block) ⇒ Object 



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# File 'lib/gitstats/git.rb', line 50

def get_commits(last = nil, &block)
  if last.nil?
    range = @ref
    unless @cachefile.nil?
      begin
        read_cache do |commit|
          block.call(commit)
          last = commit
        end
        range = "#{last[:hash]}..#{@ref}"
      rescue
      end
    end
  else
    range = "#{last}..#{@ref}"
  end

  open_cache unless @cachefile.nil?

  commit = nil
  sh("git log --reverse --summary --numstat --encoding=utf-8 --pretty=format:\"HEADER: %at %ai %H %T %aN <%aE>\" #{range}") do |line|
    # My `git log` sometimes returns non utf-8 strings...
    # The workaround tries to recover from such scenarios.
    unless line.valid_encoding?
      line = line.force_encoding('ISO-8859-15').encode!('UTF-8', :invalid => :replace, :undef => :replace, :replace => "")
    end

    if line =~ /^HEADER:/
      unless commit.nil?
        write_cache(commit) unless @cachefile.nil?
        block.call(commit)
      end

      parts = line.split(' ', 8)
      parts.shift

      commit = Hash.new
      commit[:time] = Time.at(parts[0].to_i)
      commit[:timezone] = parts[3]
      commit[:hash] = parts[4]
      commit[:tree] = parts[5]
      name = nil
      email = ''
      match = /^(.+) <(.+)>$/.match(parts[6])
      if match.nil?
        name = parts[6]
      else
        name, email = match.captures
      end
      commit[:author] = Author.new(name, email)
      commit[:files_added] = 0
      commit[:files_deleted] = 0
      commit[:lines_added] = 0
      commit[:lines_deleted] = 0
    elsif line == ''
      write_cache(commit) unless @cachefile.nil?
      block.call(commit)
      commit = nil
    elsif line =~ /^ /
      if line =~ /^ create/
        commit[:files_added] += 1
      elsif line =~ /^ delete/
        commit[:files_deleted] += 1
      end
    else
      match = /^(\d+)\s+(\d+)/.match(line)
      unless match.nil?
        added, deleted = match.captures
        commit[:lines_added] += added.to_i
        commit[:lines_deleted] += deleted.to_i
      end
    end
  end

  unless commit.nil?
    write_cache(commit) unless @cachefile.nil?
    block.call(commit)
  end

ensure
  close_cache unless @cachefile.nil?
end

#get_files(ref = nil, &block) ⇒ Object 



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# File 'lib/gitstats/git.rb', line 133

def get_files(ref = nil, &block)
  ref ||= @ref

  sh("git ls-tree -r -l #{ref}").split(/\n/).each do |line|
    parts = line.split(/\s+/, 5)
    next if parts[1] != 'blob'

    file = Hash.new
    file[:hash] = parts[2]
    file[:size] = parts[3].to_i
    file[:name] = parts[4]

    block.call(file)
  end
end

#open_cache ⇒ Object 



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# File 'lib/gitstats/git.rb', line 14

def open_cache
  FileUtils.mkdir_p(File.dirname(@cachefile))
  @cache = File.new(@cachefile, 'a')
end

#read_cache ⇒ Object 



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# File 'lib/gitstats/git.rb', line 38

def read_cache
  f = File.new(@cachefile)
  while(!f.eof?)
    tmp = f.read(2)
    len = (tmp[0] << 8) + tmp[1]
    obj = f.read(len)
    raise "Read short object" if obj.size != len
    yield Marshal.load(obj)
  end
  f.close
end

#write_cache(commit) ⇒ Object 



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# File 'lib/gitstats/git.rb', line 26

def write_cache(commit)
  obj = Marshal.dump(commit)
  raise "Object too large" if obj.size > 65535

  str = ((obj.size >> 8) & 0xff).chr
  str += (obj.size & 0xff).chr
  str += obj

  @cache.write(str)
  @cache.flush
end