# MISCELLANEOUS SETTINGS
-# Use Vi(m) style key bindings.
-bindkey -v
-
# Be paranoid, new files are readable/writable by me only.
umask 077
+# Disable beeps.
+setopt nobeep
+
# Prevent overwriting existing files with '> filename', use '>| filename'
# (or >!) instead.
setopt noclobber
setopt ignoreeof
+# KEY BINDINGS
+
+# Not all bindings are done here, only those not specific to a given section.
+
+# Use Vi(m) style key bindings.
+bindkey -v
+
+# Also use jj to exit insert mode.
+bindkey 'jj' vi-cmd-mode
+
+# I don't need the arrow keys, I use ^N and ^P for this (see below).
+bindkey -r '^[OA' '^[OB' '^[OC' '^[OD' '^[[A' '^[[B' '^[[C' '^[[D'
+# Also not in Vi mode.
+bindkey -a -r '^[OA' '^[OB' '^[OC' '^[OD' '^[[A' '^[[B' '^[[C' '^[[D'
+
+
# FUNCTION SETTINGS
+# Make sure every entry in $fpath is unique.
+typeset -U fpath
+# ~/.zsh/functions/completion is a symbolic link to the Completion directory
+# of a Zsh CVS checkout. Use it to get the newest completions if available.
+if [[ -d ~/.zsh/functions/completion ]]; then
+ fpath=(~/.zsh/functions/completion/*/*(/) $fpath)
+fi
# Set correct fpath to allow loading my functions (including completion
# functions).
fpath=(~/.zsh/functions $fpath)
# Autoload my functions (except completion functions and hidden files). Thanks
# to caphuso from the Zsh example files for this idea.
-autoload ${fpath[1]}/^_*(^/:t)
+if [[ -d ~/.zsh/functions ]]; then
+ autoload ${fpath[1]}/^_*(^/:t)
+fi
-# Simulate hooks using _functions arrays for Zsh versions older then 4.3.4. At
-# the moment only precmd() and preexec() are simulated.
-if [[ $ZSH_VERSION != (4.3.<4->|4.<4->*|<5->*) ]]; then
+# Simulate hooks using _functions arrays for Zsh versions older than 4.3.4. At
+# the moment only precmd(), preexec() and chpwd() are simulated.
+#
+# At least 4.3.4 (not sure about later versions) has an error in add-zsh-hook
+# so the compatibility version is used there too.
+if [[ $ZSH_VERSION != (4.3.<5->|4.<4->*|<5->*) ]]; then
# Provide add-zsh-hook which was added in 4.3.4.
- fpath=($fpath ~/.zsh/functions/compatibility)
+ fpath=(~/.zsh/functions/compatibility $fpath)
- # Run all functions defined in the ${precmd,preexec}_functions arrays.
+ # Run all functions defined in the ${precmd,preexec,chpwd}_functions
+ # arrays.
function precmd() {
for function in $precmd_functions; do
$function $@
$function $@
done
}
+ function chpwd() {
+ for function in $chpwd_functions; do
+ $function $@
+ done
+ }
fi
# Autoload add-zsh-hook to add/remove zsh hook functions easily.
autoload -Uz add-zsh-hook
+# Load zmv (zsh move) which is powerful to rename files.
+autoload zmv
+
# HISTORY SETTINGS
# Use history and store it in ~/.zsh/history.
-HISTSIZE=5000
-SAVEHIST=5000
+HISTSIZE=50000
+SAVEHIST=50000
HISTFILE=~/.zsh/history
# Append to the history file instead of overwriting it and do it immediately
# when a command is executed.
setopt incappendhistory
# If the same command is run multiple times store it only once in the history.
setopt histignoredups
-# Vim like completions of previous executed commands.
-bindkey "^P" history-beginning-search-backward
-bindkey "^N" history-beginning-search-forward
+# Vim like completions of previous executed commands (also enter Vi-mode). If
+# called at the beginning it just recalls old commands (like cursor up), if
+# called after typing something, only lines starting with the typed are
+# returned. Very useful to get old commands quickly. Thanks to Mikachu in #zsh
+# on Freenode (2010-01-17 12:47) for the information how to a use function
+# with bindkey.
+zle -N my-vi-history-beginning-search-backward
+my-vi-history-beginning-search-backward() {
+ local not_at_beginning_of_line
+ if [[ $CURSOR -ne 0 ]]; then
+ not_at_beginning_of_line=yes
+ fi
+
+ zle history-beginning-search-backward
+
+ # Start Vi-mode and stay at the same position (Vi-mode moves one left,
+ # this counters it).
+ zle vi-cmd-mode
+ if [[ -n $not_at_beginning_of_line ]]; then
+ zle vi-forward-char
+ fi
+}
+bindkey '^P' my-vi-history-beginning-search-backward
+bindkey -a '^P' history-beginning-search-backward # binding for Vi-mode
+# Here only Vi-mode is necessary as ^P enters Vi-mode and ^N only makes sense
+# after calling ^P.
+bindkey -a '^N' history-beginning-search-forward
# PROMPT SETTINGS
# Use colorized output, necessary for prompts and completions.
autoload -U colors && colors
+# Some shortcuts for colors. The %{...%} tells zsh that the data in between
+# doesn't need any space, necessary for correct prompt draw.
+local red="%{${fg[red]}%}"
+local blue="%{${fg[blue]}%}"
+local green="%{${fg[green]}%}"
+local yellow="%{${fg[yellow]}%}"
+local default="%{${fg[default]}%}"
+
# Set the default prompt. The current host and working directory is displayed,
# the exit code of the last command if it wasn't 0, the number of running jobs
-# if not 0 and a + if this shell is running inside another shell.
+# if not 0.
+#
# The prompt is in green and blue to make easily detectable, the error exit
# code in red and bold and the job count in yellow.
-PROMPT="%{${fg[green]}%}%B%m%b%{${fg[default]}%}:\
-%{${fg[blue]}%}%B%~%b%{${fg[default]}%} \
-%(1j.%{${fg[yellow]}%}%j%{${fg[default]}%}.)%(2L.+.)%# \
-%(?..(%{${fg[red]}%}%B%?%b%{${fg[default]}%}%) )"
+PROMPT="$green%B%m%b$default:$blue%B%~%b$default \
+%(1j.$yellow%j$default.)%# \
+%(?..($red%B%?%b$default%) )"
+
+# vcs_info was added in 4.3.9 but it works in earlier versions too. So load it
+# if the necessary files are available in ~/.zsh/functions/vcs_info (often a
+# symbolic link to current checkout of Zsh's sources).
+if [[ $ZSH_VERSION == (4.3.<9->|4.<4->*|<5->*) ||
+ -d ~/.zsh/functions/vcs_info ]]; then
+ # Update fpath to allow loading the vcs_info functions.
+ if [[ -d ~/.zsh/functions/vcs_info ]]; then
+ fpath=(~/.zsh/functions/vcs_info/
+ ~/.zsh/functions/vcs_info/Backends
+ $fpath)
+ fi
-# VCS_Info was added in 4.3.9.
-if [[ $ZSH_VERSION == (4.3.<9->|4.<4->*|<5->*) ]]; then
# Allow substitutions and expansions in the prompt, necessary for
# vcs_info.
setopt promptsubst
autoload -Uz vcs_info
# Only look for git and mercurial repositories; the only I use.
zstyle ':vcs_info:*' enable git hg
- # Set style of vcs_info display. The current branch (green) and vcs (blue)
+ # Check the repository for changes so they can be used in %u/%c (see
+ # below). This comes with a speed penalty for bigger repositories.
+ zstyle ':vcs_info:*' check-for-changes true
+
+ # Set style of vcs_info display. The current branch (green) and VCS (blue)
# is displayed. If there is an special action going on (merge, rebase)
- # it's also displayed (red).
- zstyle ':vcs_info:*' formats \
- "(%{${fg[green]}%}%b%{${fg[default]}%}:\
-%{${fg[blue]}%}%s%{${fg[default]}%})"
- zstyle ':vcs_info:*' actionformats \
- "(%{${fg[green]}%}%b%{${fg[default]}%}/\
-%{${fg[red]}%}%a%{${fg[default]}%}:\
-%{${fg[blue]}%}%s%{${fg[default]}%})"
+ # it's also displayed (red). Also display if there are unstaged or staged
+ # (%u/%c) changes.
+ if [[ $ZSH_VERSION == (4.3.<11->|4.<4->*|<5->*) ||
+ -d ~/.zsh/functions/vcs_info ]]; then
+ zstyle ':vcs_info:*' formats \
+ "($green%b%u%c$default:$blue%s$default)"
+ zstyle ':vcs_info:*' actionformats \
+ "($green%b%u%c$default/$red%a$default:$blue%s$default)"
+ else
+ # In older versions %u and %c are not defined yet and are not
+ # correctly expanded.
+ zstyle ':vcs_info:*' formats \
+ "($green%b$default:$blue%s$default)"
+ zstyle ':vcs_info:*' actionformats \
+ "($green%b$default/$red%a$default:$blue%s$default)"
+ fi
+ # Set style for formats/actionformats when unstaged (%u) and staged (%c)
+ # changes are detected in the repository; check-for-changes must be set to
+ # true for this to work. Thanks to Bart Trojanowski
+ # (http://jukie.net/~bart/blog/pimping-out-zsh-prompt) for the idea
+ # (2010-03-11 00:20).
+ zstyle ':vcs_info:*' unstagedstr '¹'
+ zstyle ':vcs_info:*' stagedstr '²'
+
# Call vcs_info as precmd before every prompt.
prompt_precmd() {
vcs_info
}
add-zsh-hook precmd prompt_precmd
- # Display the vcs information in the right prompt.
- RPROMPT='${vcs_info_msg_0_}'
+ # Display the VCS information in the right prompt.
+ if [[ $ZSH_VERSION == (4.3.<9->|4.<4->*|<5->*) ]]; then
+ RPROMPT='${vcs_info_msg_0_}'
+ # There is a bug in Zsh below 4.3.9 which displays a wrong symbol when
+ # ${vcs_info_msg_0_} is empty. Provide a workaround for those versions,
+ # thanks to Frank Terbeck <ft@bewatermyfriend.org> for it.
+ else
+ RPROMPT='${vcs_info_msg_0_:- }'
+ fi
fi
-# When screen is used set the name of the window to the currently running
-# program.
+unset red blue green yellow default
+
+# When screen, xterm or rxvt is used set the name of the window to the
+# currently running program.
#
# When a program is started preexec() sets the window's name to it; when it
-# stops precmd() resets the windows' name to 'zsh'.
-if [[ $TERM == screen ]]; then
- # Set to a non empty value to reset the window name in the next precmd()
- # call.
- screen_name_reset=yes
+# stops precmd() resets the window's name to 'zsh'.
+#
+# It works with screen, xterm and rxvt.
+#
+# If a command is run with sudo or if the shell is running as root then a ! is
+# added at the beginning of the command to make this clear. If a command is
+# running on a different computer with ssh a @ is added at the beginning. If
+# screen is running on the remote machine instead of @screen @:hostname
+# (hostname replaced by the machine's hostname) is displayed. This only works
+# if the .zshrc on the server also uses this command.
+#
+# screen* is necessary as `screen` uses screen.linux for example for a linux
+# console.
+if [[ $TERM == screen* || $TERM == xterm* || $TERM == rxvt* ]]; then
+ # Is set to a non empty value to reset the window name in the next
+ # precmd() call.
+ window_reset=yes
+ # Is set to a non empty value when the shell is running as root.
+ if [[ $(id -u) -eq 0 ]]; then
+ window_root=yes
+ fi
- screen_preexec() {
+ window_preexec() {
# Get the program name with its arguments.
local program_name=$1
- # When sudo is used use real program name instead.
+
+ # When sudo is used use real program name instead, but with an
+ # exclamation mark at the beginning (handled below).
+ local program_sudo=
if [[ $program_name == sudo* ]]; then
program_name=${program_name#sudo }
+ program_sudo=yes
fi
# Remove all arguments from the program name.
program_name=${program_name%% *}
# Ignore often used commands which are only running for a very short
# time. This prevents a "blinking" name when it's changed to "cd" for
# example and then some milliseconds later back to "zsh".
- [[ $program_name == (cd*|ls|la|ll|clear) ]] && return
+ [[ $program_name == (cd*|ls|la|ll|clear|c) ]] && return
# Change my shortcuts so the real name of the program is displayed.
case $program_name in
m)
program_name=mutt
;;
- v|vi)
+ v)
program_name=vim
;;
esac
+ # Add an exclamation mark at the beginning if running with sudo or if
+ # running zsh as root.
+ if [[ -n $program_sudo || -n $window_root ]]; then
+ program_name=!$program_name
+ fi
+
+ # Add an at mark at the beginning if running through ssh on a
+ # different computer.
+ if [[ -n $SSH_CONNECTION ]]; then
+ program_name="@$program_name"
+
+ # If screen is running in SSH then display "@:hostname" as title
+ # in the term/outer screen.
+ if [[ $program_name == @screen ]]; then
+ program_name="@:${$(hostname)//.*/}"
+ fi
+ fi
+
# Set the window name to the currently running program.
- print -n "\ek$program_name\e\\"
+ window_title "$program_name"
# Tell precmd() to reset the window name when the program stops.
- screen_name_reset=yes
+ window_reset=yes
}
- screen_precmd() {
+ window_precmd() {
# Abort if no window name reset is necessary.
- [[ -z $screen_name_reset ]] && return
+ [[ -z $window_reset ]] && return
# Reset the window name to 'zsh'.
- print -n "\ekzsh\e\\"
+ local name=zsh
+ # If the function was called with an argument then reset the window
+ # name to '.zsh' (used by clear alias).
+ if [[ -n $1 ]]; then
+ name=.zsh
+ fi
+
+ # Prepend prefixes like in window_preexec().
+ if [[ -n $window_root ]]; then
+ name="!$name"
+ fi
+ if [[ -n $SSH_CONNECTION ]]; then
+ name="@$name"
+ fi
+ window_title $name
# Just reset the name, so no screen reset necessary for the moment.
- screen_name_reset=
+ window_reset=
}
+ # Sets the window title. Works with screen, xterm and rxvt.
+ if [[ $TERM == screen* ]]; then
+ window_title() {
+ print -n "\ek$1\e\\"
+ }
+ elif [[ $TERM == xterm* || $TERM == rxvt* ]]; then
+ window_title() {
+ print -n "\e]2;$1\e\\"
+ }
+ else
+ # Fallback if another TERM is used.
+ window_title() { }
+ fi
+
# Add the preexec() and precmd() hooks.
- add-zsh-hook preexec screen_preexec
- add-zsh-hook precmd screen_precmd
+ add-zsh-hook preexec window_preexec
+ add-zsh-hook precmd window_precmd
fi
# (coloring, scrollable).
zmodload zsh/complist
# Use new completion system, store dumpfile in ~/.zsh/cache to prevent
-# cluttering of ~/.
+# cluttering of ~/. $fpath must be set before calling this. Thanks to Adlai in
+# #zsh on Freenode (2009-08-07 21:05) for reminding me of the $fpath problem.
autoload -U compinit && compinit -d ~/.zsh/cache/zcompdump
+
+# Use cache to speed up completions.
+zstyle ':completion:*' use-cache on
+zstyle ':completion:*' cache-path ~/.zsh/cache
+
+# Complete arguments and fix spelling mistakes when possible.
+zstyle ':completion:*' completer _complete _match _correct _approximate
+
# Make sure the list of possible completions is displayed after pressing <TAB>
# the first time.
setopt nolistambiguous
# Allow completions in the middle of a text, i.e. "/usr/bin/<TAB>whatever"
# completes like "/usr/bin/<TAB>". Useful when adding new options to commands.
-bindkey "^I" expand-or-complete-prefix
-# Use cache to speed up completions.
-zstyle ':completion:*' use-cache on
-zstyle ':completion:*' cache-path ~/.zsh/cache
+bindkey '^I' expand-or-complete-prefix
# Try uppercase if the currently typed string doesn't match. This allows
# typing in lowercase most of the time and completion fixes the case.
zstyle ':completion:*' matcher-list '' 'm:{a-z}={A-Z}'
-# Ignore completion functions.
-zstyle ':completion:*:functions' ignored-patterns '_*'
-# Ignore parent directory.
-zstyle ':completion:*:(cd|mv|cp):*' ignore-parents parent pwd
+
# Use ls like colors for completions.
zstyle ':completion:*' list-colors ${(s.:.)LS_COLORS}
+
# Make completion lists scrollable so "do you wish to see all n possibilities"
# is no longer displayed.
zstyle ':completion:*' list-prompt '%p'
-# When unsetting variables make sure every variable name is only suggested
-# once.
-zstyle ':completion:*:unset:*' ignore-line yes
-# When working with Mercurial and Git don't complete the same file multiple
-# times. Very useful when completing file names.
-zstyle ':completion:*:(hg|git)*:*' ignore-line yes
+# Display group name (like 'external command', 'alias', etc.) when there are
+# multiple matches in bold.
+zstyle ':completion:*' format ' %B%d%b:'
+# Display different types of matches separately.
+zstyle ':completion:*' group-name ''
+# Ignore completion functions.
+zstyle ':completion:*:functions' ignored-patterns '_*'
+# Ignore parent directory.
+zstyle ':completion:*:(cd|mv|cp):*' ignore-parents parent pwd
+# Always complete one value (file name) only once in the current line. This
+# makes it easy to complete multiple values because I can just press tab to
+# get all possible values. Otherwise I would have to skip the first value
+# again and again.
+zstyle ':completion:*' ignore-line yes
+# Except for mv and cp, because I often want to use to similar names, so I
+# complete to the same and change it.
+zstyle ':completion:*:(mv|cp):*' ignore-line no
-# CUSTOM ALIASES AND FUNCTIONS
-# Simplify calls to less, automatically redirects all output.
-alias -g L='2>&1 | less'
-# Simplify calls to colordiff, output is also piped through less.
-alias -g D='2>&1 | colordiff L'
-# Simplify calls to grep.
-alias -g G='| grep'
+# CUSTOM ALIASES AND FUNCTIONS
-# Automatically use unified diffs.
-alias diff='diff -u'
+# If ^C is pressed while typing a command, add it to the history so it can be
+# easily retrieved later and then abort like ^C normally does. This is useful
+# when I want to abort an command to do something in between and then finish
+# typing the command.
+#
+# Thanks to Vadim Zeitlin <vz-zsh@zeitlins.org> for a fix (--) so lines
+# starting with - don't cause errors; and to Nadav Har'El
+# <nyh@math.technion.ac.il> for a fix (-r) to handle whitespace/quotes
+# correctly, both on the Zsh mailing list.
+TRAPINT() {
+ # Store the current buffer in the history.
+ zle && print -s -r -- $BUFFER
-# Display all files and use human readable sizes.
-alias du='du -sh'
+ # Return the default exit code so Zsh aborts the current command.
+ return $1
+}
-# Multiple files given to Vim are opened in tabs, supported since Vim 7.
-if [[ ${${${(f)"$(vim --version)"}[1]#VIM - Vi IMproved }%% *} == 7* ]]; then
- alias vim='vim -p'
+# Colorize stderr. Very useful when looking for errors. Thanks to
+# http://gentoo-wiki.com/wiki/Zsh for the basic script and Mikachu in #zsh on
+# Freenode (2010-03-07 04:03) for some improvements (-r, printf). It's not yet
+# perfect and doesn't work with su and git for example, but it can handle most
+# interactive output quite well (even with no trailing new line) and in those
+# cases the E alias can be used as workaround.
+exec 2>>(while read -r -k -u 0 line; do
+ printf '\e[91m%s\e[0m' "$line";
+ print -n $'\0';
+done &)
+
+# Load aliases and similar functions also used by other shells.
+if [[ -f ~/.shell/aliases ]]; then
+ . ~/.shell/aliases
fi
-# Shortcuts for often used programs.
-alias e='elinks'
-alias g='git'
-alias m='mutt'
-alias v='vim'
-alias vi='vim'
-
-# Exit binding like in Vim; I sometimes confuse editor and shell.
-alias :q='exit'
+# Make sure aliases are expanded when using sudo.
+alias sudo='sudo '
-# Edit the mercurial patch queue series file for the current mercurial
-# repository in Vim. Also change Vim's pwd to the patches directory so other
-# patches can easily be opened.
-alias vqs='vim -c "cd $(hg root)/.hg/patches/" "$(hg root)/.hg/patches/series"'
+# Global aliases for often used commands in the command line.
+alias -g E='2>&1'
+alias -g L='E | less'
+alias -g D='E | colordiff L'
+alias -g G='| grep'
+alias -g S='| sort'
+alias -g U='| uniq'
+alias -g H='| head'
+alias -g T='| tail'
# Make going up directories simple.
alias -g ...='../..'
alias -g ....='../../..'
alias -g .....='../../../..'
-# Improved ls which displays the files in columns (-C), visualizes directories,
-# links and other special files (-F) and pages everything through less (L).
-#
-# If available use GNU ls with colorized output. If it isn't available use
-# normal ls which needs CLICOLOR_FORCE so it displays colors when used with a
-# pager.
-ls --color &> /dev/null
-if [[ $? -eq 0 ]]; then
- alias ls='ls --color'
-else
- alias ls='CLICOLOR_FORCE=1 ls -G'
+# If the window naming feature is used (see above) then use ".zsh" (leading
+# dot) as title name after running clear so it's clear to me that the window
+# is empty. I open so much windows that I don't know in which I have something
+# important. This helps me to remember which windows are empty (I run clear
+# after I finished my work in a window).
+if [[ -n $window_reset ]]; then
+ alias clear='clear; window_reset=yes; window_precmd reset'
fi
-# Main ls function.
-function ls() {
- command ls -C -F $* L
-}
-# Helper function to list all files.
-function la() {
- ls -a $*
+
+# Display all branches (except stash) in gitk but only 200 commits as this is
+# much faster. Also put in the background and disown. Thanks to sitaram in
+# #git on Freenode (2009-04-20 15:51).
+gitk() {
+ command gitk \
+ --max-count=200 \
+ $(git rev-parse --symbolic-full-name --remotes --branches) \
+ $@ &
+ disown %command
}
-# Helper function to list all files in list format with access rights, etc.
-function ll() {
- la -l $*
+# Same for tig (except the disown part as it's no GUI program).
+tig() {
+ command tig \
+ --max-count=200 \
+ $(git rev-parse --symbolic-full-name --remotes --branches) \
+ $@
}
-# If ^C is pressed while typing a command, add it to the history so it can be
-# easily retrieved later and then abort like ^C normally does. This is useful
-# when I want to abort an command to do something in between and then finish
-# typing the command.
-TRAPINT() {
- # Store the current buffer in the history.
- zle && print -s $BUFFER
- # Return the default exit code so zsh aborts the current command.
- return $1
-}
+# OS SPECIFIC SETTINGS
-# Display TODOs stored in ~/.todo if this file exists.
-todo() {
- if [[ -f ~/.todo ]]; then
- cat ~/.todo | $PAGER
- fi
-}
+local uname=$(uname)
+
+if [[ $uname == Linux ]]; then
+ # Settings when creating Debian packages.
+ DEBEMAIL=simon@ruderich.org
+ export DEBEMAIL
+ DEBFULLNAME='Simon Ruderich'
+ export DEBFULLNAME
+
+elif [[ $uname == Darwin ]]; then # Mac OS X
+ # Store the current clipboard in CLIPBOARD before every command so it can
+ # be used in commands.
+ os_darwin_preexec() {
+ export CLIPBOARD="$(pbpaste)"
+ }
+ # Add the function as preexec hook.
+ add-zsh-hook preexec os_darwin_preexec
+ # Initialize CLIPBOARD so it's available for completion directly after
+ # startup.
+ CLIPBOARD=""
+ export CLIPBOARD
+
+ # Fetch current URL in clipboard with wget.
+ alias wnc='wget --no-proxy $CLIPBOARD'
+fi
+
+
+# LOAD ADDITIONAL CONFIGURATION FILES
-# Load rc file for current OS.
-source_config ~/.zsh os rc $(uname) nolocal
# Load rc file for current hostname (first part before a dot) or rc.local.
source_config ~/.zsh host rc ${$(hostname)//.*/}
+
+# RUN COMMANDS
+
+# If not already in screen reattach to a running session or create a new one.
+# This also starts screen one a remote server when connecting through ssh.
+if [[ $TERM != dumb && -z $STY ]]; then
+ # Get running detached sessions.
+ session=$(screen -list | grep 'Detached' | awk '{ print $1; exit }')
+
+ # As we exec later we have to set the title here.
+ window_preexec "screen"
+
+ # Create a new session if none is running.
+ if [[ -z $session ]]; then
+ exec screen
+ # Reattach to a running session.
+ else
+ exec screen -r $session
+ fi
+fi
+
+
source_debug "finished sourcing ~/.zsh/rc"
+
+# vim: ft=zsh
ruderich.org/simon / config / dotfiles.git / blobdiff