Class: Grit::GitRuby::Repository

Inherits:
Object
  • Object
show all
Defined in:
lib/grit/git-ruby/repository.rb

Defined Under Namespace

Classes: NoSuchPath, NoSuchShaFound

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(git_dir, options = {}) ⇒ Repository

Returns a new instance of Repository.



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# File 'lib/grit/git-ruby/repository.rb', line 37

def initialize(git_dir, options = {})
  @git_dir = git_dir
  @options = options
  @packs = []
end

Instance Attribute Details

#git_dir ⇒ Object

Returns the value of attribute git_dir.



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# File 'lib/grit/git-ruby/repository.rb', line 35

def git_dir
  @git_dir
end

#options ⇒ Object

Returns the value of attribute options.



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# File 'lib/grit/git-ruby/repository.rb', line 35

def options
  @options
end

Class Method Details

.add_file(name, contents) ⇒ Object 



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# File 'lib/grit/git-ruby/repository.rb', line 676

def self.add_file(name, contents)
  File.open(name, 'w') do |f|
    f.write contents
  end
end

.create_initial_config(bare = false) ⇒ Object 



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# File 'lib/grit/git-ruby/repository.rb', line 670

def self.create_initial_config(bare = false)
  bare ? bare_status = 'true' : bare_status = 'false'
  config = "[core]\n\trepositoryformatversion = 0\n\tfilemode = true\n\tbare = #{bare_status}\n\tlogallrefupdates = true"
  add_file('config', config)
end

.init(dir, bare = true) ⇒ Object

initialize a git repository



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# File 'lib/grit/git-ruby/repository.rb', line 636

def self.init(dir, bare = true)

  FileUtils.mkdir_p(dir) if !File.exists?(dir)

  FileUtils.cd(dir) do
    if(File.exists?('objects'))
      return false # already initialized
    else
      # initialize directory
      create_initial_config(bare)
      FileUtils.mkdir_p('refs/heads')
      FileUtils.mkdir_p('refs/tags')
      FileUtils.mkdir_p('objects/info')
      FileUtils.mkdir_p('objects/pack')
      FileUtils.mkdir_p('branches')
      add_file('description', 'Unnamed repository; edit this file to name it for gitweb.')
      add_file('HEAD', "ref: refs/heads/master\n")
      FileUtils.mkdir_p('hooks')
      FileUtils.cd('hooks') do
        add_file('applypatch-msg', '# add shell script and make executable to enable')
        add_file('post-commit', '# add shell script and make executable to enable')
        add_file('post-receive', '# add shell script and make executable to enable')
        add_file('post-update', '# add shell script and make executable to enable')
        add_file('pre-applypatch', '# add shell script and make executable to enable')
        add_file('pre-commit', '# add shell script and make executable to enable')
        add_file('pre-rebase', '# add shell script and make executable to enable')
        add_file('update', '# add shell script and make executable to enable')
      end
      FileUtils.mkdir_p('info')
      add_file('info/exclude', "# *.[oa]\n# *~")
    end
  end
end

Instance Method Details

#blame_tree(commit_sha, path) ⇒ Object 



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# File 'lib/grit/git-ruby/repository.rb', line 567

def blame_tree(commit_sha, path)
  # find subtree
  tree_sha = get_subtree(commit_sha, path)
  return {} if !tree_sha

  looking_for = []
  get_object_by_sha1(tree_sha).entry.each do |e|
    looking_for << File.join('.', e.name)
  end

  @already_searched = {}
  commits = look_for_commits(commit_sha, path, looking_for)

  # cleaning up array
  arr = {}
  commits.each do |commit_array|
    key = commit_array[0].gsub('./', '')
    arr[key] = commit_array[1]
  end
  arr
end

#cached(key, object, do_cache = true) ⇒ Object 



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# File 'lib/grit/git-ruby/repository.rb', line 99

def cached(key, object, do_cache = true)
  object
end

#cat_file(sha) ⇒ Object

returns the raw file contents of this sha



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# File 'lib/grit/git-ruby/repository.rb', line 154

def cat_file(sha)
  get_object_by_sha1(sha).raw_content
end

#cat_file_size(sha) ⇒ Object

returns the file size (as an int) of this sha



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# File 'lib/grit/git-ruby/repository.rb', line 149

def cat_file_size(sha)
  get_raw_object_by_sha1(sha).content.size
end

#cat_file_type(sha) ⇒ Object

returns the file type (as a symbol) of this sha



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# File 'lib/grit/git-ruby/repository.rb', line 144

def cat_file_type(sha)
  get_raw_object_by_sha1(sha).type
end

#close ⇒ Object 



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# File 'lib/grit/git-ruby/repository.rb', line 682

def close
  @packs.each do |pack|
    pack.close
  end if @packs
end

#diff(commit1, commit2, options = {}) ⇒ Object 



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# File 'lib/grit/git-ruby/repository.rb', line 395

def diff(commit1, commit2, options = {})
  patch = ''

  commit_obj1 = get_object_by_sha1(commit1)
  tree1 = commit_obj1.tree
  if commit2
    tree2 = get_object_by_sha1(commit2).tree
  else
    tree2 = get_object_by_sha1(commit_obj1.parent.first).tree
  end

  qdiff = quick_diff(tree1, tree2)

  qdiff.sort.each do |diff_arr|
    path, status, treeSHA1, treeSHA2 = *diff_arr
    format, lines, output = :unified, 3, ''
    file_length_difference = 0

    fileA = treeSHA1 ? cat_file(treeSHA1) : ''
    fileB = treeSHA2 ? cat_file(treeSHA2) : ''

    sha1 = treeSHA1 || '0000000000000000000000000000000000000000'
    sha2 = treeSHA2 || '0000000000000000000000000000000000000000'

    data_old = fileA.split(/\n/).map! { |e| e.chomp }
    data_new = fileB.split(/\n/).map! { |e| e.chomp }

    diffs = Difference::LCS.diff(data_old, data_new)
    next if diffs.empty?

    a_path = "a/#{path.gsub('./', '')}"
    b_path = "b/#{path.gsub('./', '')}"

    header = "diff --git #{a_path} #{b_path}"
    if options[:full_index]
      header << "\n" + 'index ' + sha1 + '..' + sha2
      header << ' 100644' if treeSHA2 # hard coding this because i don't think we use it
    else
      header << "\n" + 'index ' + sha1[0,7] + '..' + sha2[0,7]
      header << ' 100644' if treeSHA2 # hard coding this because i don't think we use it
    end
    header << "\n--- " + (treeSHA1 ? a_path : '/dev/null')
    header << "\n+++ " + (treeSHA2 ? b_path : '/dev/null')
    header += "\n"

    oldhunk = hunk = nil

    diffs.each do |piece|
      begin
        hunk = Difference::LCS::Hunk.new(data_old, data_new, piece, lines, file_length_difference)
        file_length_difference = hunk.file_length_difference

        next unless oldhunk

        if lines > 0 && hunk.overlaps?(oldhunk)
          hunk.unshift(oldhunk)
        else
          output << oldhunk.diff(format)
        end
      ensure
        oldhunk = hunk
        output << "\n"
      end
    end

    output << oldhunk.diff(format)
    output << "\n"

    patch << header + output.lstrip
  end
  patch
rescue
  '' # one of the trees was bad or lcs isn't there - no diff
end

#files_changed?(tree_sha1, tree_sha2, path_limiter = nil) ⇒ Boolean

returns true if the files in path_limiter were changed, or no path limiter used by the log() function when passed with a path_limiter

Returns:

  • (Boolean) 


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# File 'lib/grit/git-ruby/repository.rb', line 535

def files_changed?(tree_sha1, tree_sha2, path_limiter = nil)
  if path_limiter
    mod = quick_diff(tree_sha1, tree_sha2)
    files = mod.map { |c| c.first }
    path_limiter.to_a.each do |filepath|
      if files.include?(filepath)
        return true
      end
    end
    return false
  end
  true
end

#get_object_by_sha1(sha1) ⇒ Object

returns GitRuby object of any type given a SHA1



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# File 'lib/grit/git-ruby/repository.rb', line 104

def get_object_by_sha1(sha1)
  r = get_raw_object_by_sha1(sha1)
  return nil if !r
  GitObject.from_raw(r)
end

#get_raw_object_by_sha1(sha1o) ⇒ Object

returns a raw object given a SHA1

Raises:



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# File 'lib/grit/git-ruby/repository.rb', line 72

def get_raw_object_by_sha1(sha1o)
  raise NoSuchShaFound if sha1o.nil? || sha1o.empty? || !sha1o.is_a?(String)

  sha1 = [sha1o.chomp].pack("H*")
  # try packs
  packs.each do |pack|
    o = pack[sha1]
    return pack[sha1] if o
  end

  # try loose storage
  loose.each do |lsobj|
    o = lsobj[sha1]
    return o if o
  end

  # try packs again, maybe the object got packed in the meantime
  initpacks
  packs.each do |pack|
    o = pack[sha1]
    return o if o
  end

#        puts "*#{sha1o}*"
  raise NoSuchShaFound
end

#get_raw_tree(sha, recursive = false) ⇒ Object 



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# File 'lib/grit/git-ruby/repository.rb', line 186

def get_raw_tree(sha, recursive = false)
  o = get_raw_object_by_sha1(sha)
  if o.type == :commit
    tree = get_object_by_sha1(sha).tree
  elsif o.type == :tag
    commit_sha = get_object_by_sha1(sha).object
    tree = get_object_by_sha1(commit_sha).tree
  elsif o.type == :tree
    tree = sha
  else
    return nil
  end

  recursive ? get_raw_trees(tree) : cat_file(tree)
end

#get_raw_trees(sha, path = '') ⇒ Object

Grabs tree contents recursively,

e.g. `git ls-tree -r sha`



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# File 'lib/grit/git-ruby/repository.rb', line 204

def get_raw_trees(sha, path = '')
  out = ''
  cat_file(sha).split("\n").each do |line|
    mode, type, sha, name = line.split(/\s/)

    if type == 'tree'
      full_name = path.empty? ? name : "#{path}/#{name}"
      out << get_raw_trees(sha, full_name)
    elsif path.empty?
      out << line + "\n"
    else
      out << line.gsub(name, "#{path}/#{name}") + "\n"
    end
  end

  out
end

#get_subtree(commit_sha, path) ⇒ Object 



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# File 'lib/grit/git-ruby/repository.rb', line 549

def get_subtree(commit_sha, path)
  tree_sha = get_object_by_sha1(commit_sha).tree

  if path && !(path == '' || path == '.' || path == './')
    paths = path.split('/')
    paths.each do |path|
      tree = get_object_by_sha1(tree_sha)
      if entry = tree.entry.select { |e| e.name == path }.first
        tree_sha = entry.sha1 rescue nil
      else
        return false
      end
    end
  end

  tree_sha
end

#in_loose?(sha_hex) ⇒ Boolean

returns true if the hex-packed sha is in the loose objects

Returns:

  • (Boolean) 


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# File 'lib/grit/git-ruby/repository.rb', line 135

def in_loose?(sha_hex)
  loose.each do |lsobj|
    return true if lsobj[sha_hex]
  end
  false
end

#in_packs?(sha_hex) ⇒ Boolean

returns true if the hex-packed sha is in the packfiles

Returns:

  • (Boolean) 


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# File 'lib/grit/git-ruby/repository.rb', line 126

def in_packs?(sha_hex)
  # try packs
  packs.each do |pack|
    return true if pack[sha_hex]
  end
  false
end

#list_tree(sha) ⇒ Object

returns a 2-d hash of the tree

‘blob’][‘FILENAME’

=> ‘100644’, :sha => SHA

‘tree’][‘DIRNAME’

=> ‘040000’, :sha => SHA



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# File 'lib/grit/git-ruby/repository.rb', line 161

def list_tree(sha)
  data = {'blob' => {}, 'tree' => {}, 'link' => {}, 'commit' => {}}
  get_object_by_sha1(sha).entry.each do |e|
    data[e.format_type][e.name] = {:mode => e.format_mode, :sha => e.sha1}
  end
  data
end

#log(sha, options = {}) ⇒ Object

returns an array of GitRuby Commit objects

[sha, raw_output], [sha, raw_output], [sha, raw_output

… ]

takes the following options:

:since - Time object specifying that you don't want commits BEFORE this
:until - Time object specifying that you don't want commit AFTER this
:first_parent - tells log to only walk first parent
:path_limiter - string or array of strings to limit path
:max_count - number to limit the output



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# File 'lib/grit/git-ruby/repository.rb', line 285

def log(sha, options = {})
  @already_searched = {}
  walk_log(sha, options)
end

#look_for_commits(commit_sha, path, looking_for, options = {}) ⇒ Object 



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# File 'lib/grit/git-ruby/repository.rb', line 589

def look_for_commits(commit_sha, path, looking_for, options = {})
  return [] if @already_searched[commit_sha] # to prevent rechecking branches

  @already_searched[commit_sha] = true

  commit = get_object_by_sha1(commit_sha)
  tree_sha = get_subtree(commit_sha, path)

  found_data = []

  # at the beginning of the branch
  if commit.parent.size == 0
    looking_for.each do |search|
      # prevents the rare case of multiple branch starting points with
      # files that have never changed
      if found_data.assoc(search)
        found_data << [search, commit_sha]
      end
    end
    return found_data
  end

  # go through the parents recursively, looking for somewhere this has been changed
  commit.parent.each do |pc|
    diff = quick_diff(tree_sha, get_subtree(pc, path), '.', false)

    # remove anything found
    looking_for.each do |search|
      if match = diff.assoc(search)
        found_data << [search, commit_sha, match]
        looking_for.delete(search)
      end
    end

    if looking_for.size <= 0  # we're done
      return found_data
    end

    found_data += look_for_commits(pc, path, looking_for)  # recurse into parent
    return found_data if options[:first_parent]
  end

  ## TODO : find most recent commit with change in any parent
  found_data
end

#loose ⇒ Object

returns the loose objects object lazily



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# File 'lib/grit/git-ruby/repository.rb', line 44

def loose
  @loose ||= initloose
end

#ls_tree(sha, paths = [], recursive = false) ⇒ Object

returns the raw (cat-file) output for a tree if given a commit sha, it will print the tree of that commit if given a path limiter array, it will limit the output to those if asked for recrusive trees, will traverse trees



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# File 'lib/grit/git-ruby/repository.rb', line 173

def ls_tree(sha, paths = [], recursive = false)
  if paths.size > 0
    # pathing
    part = []
    paths.each do |path|
      part += ls_tree_path(sha, path)
    end
    return part.join("\n")
  else
    get_raw_tree(sha, recursive)
  end
end

#ls_tree_path(sha, path, append = nil) ⇒ Object

return array of tree entries TODO : refactor this to remove the fugly



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# File 'lib/grit/git-ruby/repository.rb', line 224

def ls_tree_path(sha, path, append = nil)
  tree = get_raw_tree(sha)
  if path =~ /\//
    paths = path.split('/')
    last = path[path.size - 1, 1]
    if (last == '/') && (paths.size == 1)
      append = append ? File.join(append, paths.first) : paths.first
      dir_name = tree.split("\n").select { |p| p.split("\t")[1] == paths.first }.first
      raise NoSuchPath if !dir_name
      next_sha = dir_name.split(' ')[2]
      tree = get_raw_tree(next_sha)
      tree = tree.split("\n")
      if append
        mod_tree = []
        tree.each do |ent|
          (info, fpath) = ent.split("\t")
          mod_tree << [info, File.join(append, fpath)].join("\t")
        end
        mod_tree
      else
        tree
      end
    else
      raise NoSuchPath if tree.nil?
      next_path = paths.shift
      dir_name = tree.split("\n").select { |p| p.split("\t")[1] == next_path }.first
      raise NoSuchPath if !dir_name
      next_sha = dir_name.split(' ')[2]
      next_path = append ? File.join(append, next_path) : next_path
      if (last == '/')
        ls_tree_path(next_sha, paths.join("/") + '/', next_path)
      else
        ls_tree_path(next_sha, paths.join("/"), next_path)
      end
    end
  else
    raise NoSuchPath if tree.nil?
    tree = tree.split("\n")
    tree = tree.select { |p| p.split("\t")[1] == path }
    if append
      mod_tree = []
      tree.each do |ent|
        (info, fpath) = ent.split("\t")
        mod_tree << [info, File.join(append, fpath)].join("\t")
      end
      mod_tree
    else
      tree
    end
  end
end

#object_exists?(sha1) ⇒ Boolean

returns true or false if that sha exists in the db

Returns:

  • (Boolean) 


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# File 'lib/grit/git-ruby/repository.rb', line 116

def object_exists?(sha1)
  sha_hex = [sha1].pack("H*")
  return true if in_packs?(sha_hex)
  return true if in_loose?(sha_hex)
  initpacks
  return true if in_packs?(sha_hex) #maybe the object got packed in the meantime
  false
end

#packs ⇒ Object

returns the array of pack list objects



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# File 'lib/grit/git-ruby/repository.rb', line 49

def packs
  @packs ||= initpacks
end

#put_raw_object(content, type) ⇒ Object

writes a raw object into the git repo



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# File 'lib/grit/git-ruby/repository.rb', line 111

def put_raw_object(content, type)
  loose.first.put_raw_object(content, type)
end

#quick_diff(tree1, tree2, path = '.', recurse = true) ⇒ Object

takes 2 tree shas and recursively walks them to find out what files or directories have been modified in them and returns an array of changes [ [full_path, ‘added’, tree1_hash, nil],

 [full_path, 'removed', nil, tree2_hash],
 [full_path, 'modified', tree1_hash, tree2_hash]
]



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# File 'lib/grit/git-ruby/repository.rb', line 477

def quick_diff(tree1, tree2, path = '.', recurse = true)
  # handle empty trees
  changed = []
  return changed if tree1 == tree2

  t1 = list_tree(tree1) if tree1
  t2 = list_tree(tree2) if tree2

  # finding files that are different
  t1['blob'].each do |file, hsh|
    t2_file = t2['blob'][file] rescue nil
    full = File.join(path, file)
    if !t2_file
      changed << [full, 'added', hsh[:sha], nil]      # not in parent
    elsif (hsh[:sha] != t2_file[:sha])
      changed << [full, 'modified', hsh[:sha], t2_file[:sha]]   # file changed
    end
  end if t1
  t2['blob'].each do |file, hsh|
    if !t1 || !t1['blob'][file]
      changed << [File.join(path, file), 'removed', nil, hsh[:sha]]
    end
  end if t2

  t1['tree'].each do |dir, hsh|
    t2_tree = t2['tree'][dir] rescue nil
    full = File.join(path, dir)
    if !t2_tree
      if recurse
        changed += quick_diff(hsh[:sha], nil, full, true)
      else
        changed << [full, 'added', hsh[:sha], nil]      # not in parent
      end
    elsif (hsh[:sha] != t2_tree[:sha])
      if recurse
        changed += quick_diff(hsh[:sha], t2_tree[:sha], full, true)
      else
        changed << [full, 'modified', hsh[:sha], t2_tree[:sha]]   # file changed
      end
    end
  end if t1
  t2['tree'].each do |dir, hsh|
    t1_tree = t1['tree'][dir] rescue nil
    full = File.join(path, dir)
    if !t1_tree
      if recurse
        changed += quick_diff(nil, hsh[:sha], full, true)
      else
        changed << [full, 'removed', nil, hsh[:sha]]
      end
    end
  end if t2

  changed
end

#rev_list(sha, options) ⇒ Object 



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# File 'lib/grit/git-ruby/repository.rb', line 301

def rev_list(sha, options)
  if sha.is_a? Array
    (end_sha, sha) = sha
  end

  log = log(sha, options)
  log = log.sort { |a, b| a[2] <=> b[2] }.reverse

  if end_sha
    log = truncate_arr(log, end_sha)
  end

  # shorten the list if it's longer than max_count (had to get everything in branches)
  if options[:max_count]
    if (opt_len = options[:max_count].to_i) < log.size
      log = log[0, opt_len]
    end
  end

  if options[:pretty] == 'raw'
    log.map {|k, v| v }.join('')
  else
    log.map {|k, v| k }.join("\n")
  end
end

#show ⇒ Object

prints out the type, shas and content of all of the pack files



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# File 'lib/grit/git-ruby/repository.rb', line 55

def show
  packs.each do |p|
    puts p.name
    puts
    p.each_sha1 do |s|
      puts "**#{p[s].type}**"
      if p[s].type.to_s == 'commit'
        puts s.unpack('H*')
        puts p[s].content
      end
    end
    puts
  end
end

#truncate_arr(arr, sha) ⇒ Object 



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# File 'lib/grit/git-ruby/repository.rb', line 290

def truncate_arr(arr, sha)
  new_arr = []
  arr.each do |a|
    if a[0] == sha
      return new_arr
    end
    new_arr << a
  end
  return new_arr
end

#walk_log(sha, opts, total_size = 0) ⇒ Object

called by log() to recursively walk the tree



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# File 'lib/grit/git-ruby/repository.rb', line 328

def walk_log(sha, opts, total_size = 0)
  return [] if @already_searched[sha] # to prevent rechecking branches
  @already_searched[sha] = true

  array = []
  if (sha)
    o = get_raw_object_by_sha1(sha)
    if o.type == :tag
      commit_sha = get_object_by_sha1(sha).object
      c = get_object_by_sha1(commit_sha)
    else
      c = GitObject.from_raw(o)
    end

    return [] if c.type != :commit

    add_sha = true

    if opts[:since] && opts[:since].is_a?(Time) && (opts[:since] > c.committer.date)
      add_sha = false
    end
    if opts[:until] && opts[:until].is_a?(Time) && (opts[:until] < c.committer.date)
      add_sha = false
    end

    # follow all parents unless '--first-parent' is specified #
    subarray = []

    if !c.parent.first && opts[:path_limiter]  # check for the last commit
      add_sha = false
    end

    if (!opts[:max_count] || ((array.size + total_size) < opts[:max_count]))

      if !opts[:path_limiter]
        output = c.raw_log(sha)
        array << [sha, output, c.committer.date]
      end

      if (opts[:max_count] && (array.size + total_size) >= opts[:max_count])
        return array
      end

      c.parent.each do |psha|
        if psha && !files_changed?(c.tree, get_object_by_sha1(psha).tree,
                                  opts[:path_limiter])
          add_sha = false
        end
        subarray += walk_log(psha, opts, (array.size + total_size))
        next if opts[:first_parent]
      end

      if opts[:path_limiter] && add_sha
        output = c.raw_log(sha)
        array << [sha, output, c.committer.date]
      end

      if add_sha
        array += subarray
      end
    end

  end

  array
end