.git/refs 以下の mtime を見ることで高速化をした。clone 直後はもしかするとズレたりするかもしれないので heavy バージョンも -s をつけることで実行できるようにした。

• http://github.com/cho45/dotfiles/blob/master/bin/git-branch-recent

#!/usr/bin/env ruby -Ku

require 'pathname'
require "optparse"

class GitRecentCommand
	Ref = Struct.new(:hash, :name, :time, :rtime, :author, :subject)

	def dot_git
		@dot_git ||= Pathname.new(`git rev-parse --git-dir`.chomp)
	end

	def self.run(argv)
		self.new.option(argv).run
	end

	def initialize(opts={})
		@opts = {
			:strict  => false,
			:max_num => 20,
		}.update(opts)
	end

	def option(argv)
		opts = @opts
		argv = argv.dup
		OptionParser.new do |parser|
			parser.instance_eval do
				self.banner = <<-EOB.gsub(/^\t+/, "")
					Usage: #{$0} [opts]

				EOB

				separator ""

				separator "Options:"
				on("-s", "--strict", "Running on strict mode (very heavy)") do |foreground|
					opts[:strict] = true
				end

				on("-n", "--number NUMBER", "Number branch to show") do |num|
					opts[:max_num] = num.to_i
				end

				parse!(argv)
			end
		end
		self
	end

	def run
		details = @opts[:strict] ? recent_branches_strict : recent_branches_fast
		details = details.sort_by {|ref| ref.time }.last(@opts[:max_num])

		remote_master = nil
		rtime_width = name_width = author_width = 0
		details.each do |ref|
			name_width    = ref.name.size   if ref.name.size   > name_width
			author_width  = ref.author.size if ref.author.size > author_width
			rtime_width   = ref.rtime.size  if ref.rtime.size  > rtime_width
			remote_master = ref.hash        if ref.name == 'origin/master'
		end

		details.each {|ref|
			ref.instance_eval {
				out = "\e[32m% -#{name_width}s\e[39m % #{rtime_width}s %s \e[31m% -#{author_width}s\e[39m %s" % [
					name,
					rtime,
					hash[/^.{7}/],
					author,
					subject
				]
				puts (hash == remote_master) ? "\e[7m#{out}\e[0m" : out
			}
		}
	end

	# search recent branches by file mtimes
	def recent_branches_fast
		refs = []
		refs.concat Pathname.glob(dot_git + 'refs/heads/**/*')
		refs.concat Pathname.glob(dot_git + 'refs/remotes/**/*')

		branches = refs.reject {|r| r.directory? }.sort_by {|r| r.mtime }.last(@opts[:max_num]).map {|r|
			ref = r.read.chomp
			if name = ref[/ref: (.+)/, 1]
				(dot_git + name).read.chomp
			else
				ref
			end
		}
		retrieve_branch_details(branches)
	end

	# search recent branches by retrieving whole branch information
	def recent_branches_strict
		branches = `git branch -a`.gsub!(/^\*?\s+|\(no branch\)\s*/, "").split(/\n/).map {|i|
			i.split(/ -> /)[0]
		}
		retrieve_branch_details(branches)
	end

	# retrieve branch details information from branch names
	def retrieve_branch_details(branches)
		details = []
		IO.popen("-", "r+") do |io|
			if io.nil?
				args = [ "show", "--pretty=format:%H\t%d\t%ct\t%cr\t%an\t%s", *branches ]
				args << "--"
				exec "git", *args
			else
				while l = io.gets
					next unless l =~ /^[a-z0-9]{40}/
					hash, refs, time, rtime, author, subject = * l.chomp.split(/\t/)
					refs.gsub!(/^\s*\(|\)\s*$/, '')

					refs.split(/\s*,\s*/).each do |ref|
						is_remote = ref[%r{refs/remotes}]
						ref.gsub!(%r{refs/(remotes|heads)/}, '')
						details.push Ref.new(hash, ref, time.to_i, rtime, author, subject)
					end
				end
			end
		end
		details
	end
end

GitRecentCommand.run(ARGV)

zsh で C-r しているとき、スペースを補完語に使いたくても、スペースを入力した瞬間に bck-i-search: を抜けて、コマンド先頭にスペースが挿入されてしまうという状態になっていた。望む希望としては、スペースを入力したら、スペースも補完語として挿入されてほしい。

これはどうやら、自分で bindkey " " magic-abbrev-expand-and-insert というように、スペースキーに対して独自定義の関数を定義しているとそうなってしまうらしい。

zle_hist.c によると、bck-i-search の間のキー入力はハードコードで分岐していて、既に決まっているものについて書きかえるしかない。

なんとなく magic-space を上書きしてやったら、望む挙動になった。

# abbr
typeset -A abbreviations
abbreviations=(
	"L"    "| \$PAGER"
	"G"    "| grep"

	"H"     "$HOME/project/Hatena-"

	"HE"    "lib/**/Engine/"
	"HM"    "lib/**/MoCo/"
	"HA"    "lib/**/App/"
	"HC"    "lib/**/Config.pm"

	"HEAD^"     "HEAD\\^"
	"HEAD^^"    "HEAD\\^\\^"
	"HEAD^^^"   "HEAD\\^\\^\\^"
	"HEAD^^^^"  "HEAD\\^\\^\\^\\^\\^"
	"HEAD^^^^^" "HEAD\\^\\^\\^\\^\\^"

	# typo
	"lkm"  "lm"
	"it"  "git"
	"gitp"  "git"

	"mysql" "mysql -unobody -pnobody -h"
)

magic-abbrev-expand () {
	local MATCH
	LBUFFER=${LBUFFER%%(#m)[-_a-zA-Z0-9^]#}
	LBUFFER+=${abbreviations[$MATCH]:-$MATCH}
}

# BK 
magic-space () {
	magic-abbrev-expand
	zle self-insert
}

magic-abbrev-expand-and-insert () {
	magic-abbrev-expand
	zle self-insert
}

magic-abbrev-expand-and-insert-complete () {
	magic-abbrev-expand
	zle self-insert
	zle expand-or-complete
}

magic-abbrev-expand-and-accept () {
	magic-abbrev-expand
	zle accept-line
}

magic-abbrev-expand-and-normal-complete () {
	magic-abbrev-expand
	zle expand-or-complete
}

no-magic-abbrev-expand () {
	LBUFFER+=' '
}

zle -N magic-abbrev-expand
zle -N magic-abbrev-expand-and-magic-space
zle -N magic-abbrev-expand-and-insert
zle -N magic-abbrev-expand-and-insert-complete
zle -N magic-abbrev-expand-and-normal-complete
zle -N magic-abbrev-expand-and-accept
zle -N no-magic-abbrev-expand
zle -N magic-space # BK
bindkey "\r"  magic-abbrev-expand-and-accept # M-x RET できなくなる
bindkey "^J"  accept-line # no magic
bindkey " "   magic-space # BK
bindkey "."   magic-abbrev-expand-and-insert
bindkey "^I"  magic-abbrev-expand-and-normal-complete