1# Deferred completion system — runs on first prompt, not at startup
  2# Saves ~53ms by deferring compinit to precmd
  3
  4autoload -Uz compinit
  5
  6__deferred_compinit() {
  7  local dump=${XDG_CACHE_HOME:-$HOME/.cache}/zsh/.zcompdump
  8  mkdir -p "${dump:h}" 2>/dev/null
  9
 10  if [[ ! -f $dump ]]; then
 11    compinit -d "$dump"
 12  else
 13    compinit -C -d "$dump"  # -C skips security check (single-user machine)
 14  fi
 15  _zsh_compile_if_needed "$dump"
 16
 17  # Wire up alias expansion (needs compinit)
 18  # ctrl-x ctrl-a to expand aliases in place (ctrl-a stays as beginning-of-line)
 19  zle -C alias-expansion complete-word _generic
 20  bindkey '^x^a' alias-expansion
 21  zstyle ':completion:alias-expansion:*' completer _expand_alias
 22
 23  add-zsh-hook -d precmd __deferred_compinit
 24  unfunction __deferred_compinit
 25}
 26autoload -Uz add-zsh-hook
 27add-zsh-hook precmd __deferred_compinit
 28
 29# Completion styles (zstyle declarations are cheap — no need to defer)
 30zstyle ':completion:*' menu select
 31zstyle ':completion::complete:*' use-cache on
 32zstyle ':completion::complete:*' cache-path "${XDG_CACHE_HOME:-$HOME/.cache}/zsh/zcompcache"
 33
 34# Case-insensitive, partial-word, substring completion
 35zstyle ':completion:*' matcher-list '' \
 36  'm:{a-z\-}={A-Z\_}' \
 37  'r:[^[:alpha:]]||[[:alpha:]]=** r:|=* m:{a-z\-}={A-Z\_}' \
 38  'r:[[:ascii:]]||[[:ascii:]]=** r:|=* m:{a-z\-}={A-Z\_}'
 39
 40# Group matches and describe
 41zstyle ':completion:*:*:*:*:*' menu select
 42zstyle ':completion:*:matches' group 'yes'
 43zstyle ':completion:*:options' description 'yes'
 44zstyle ':completion:*:options' auto-description '%d'
 45zstyle ':completion:*:corrections' format ' %F{green}-- %d (errors: %e) --%f'
 46zstyle ':completion:*:descriptions' format ' %F{yellow}-- %d --%f'
 47zstyle ':completion:*:messages' format ' %F{purple} -- %d --%f'
 48zstyle ':completion:*:warnings' format ' %F{red}-- no matches found --%f'
 49zstyle ':completion:*:default' list-prompt '%S%M matches%s'
 50zstyle ':completion:*' format ' %F{yellow}-- %d --%f'
 51zstyle ':completion:*' group-name ''
 52zstyle ':completion:*' verbose yes
 53
 54# Fuzzy match mistyped completions
 55zstyle ':completion:*' completer _complete _list _match _approximate
 56zstyle ':completion:*:match:*' original only
 57zstyle ':completion:*:approximate:*' max-errors 1 numeric
 58zstyle -e ':completion:*:approximate:*' max-errors 'reply=($((($#PREFIX+$#SUFFIX)/3))numeric)'
 59
 60# Don't complete unavailable commands
 61zstyle ':completion:*:functions' ignored-patterns '(_*|pre(cmd|exec))'
 62
 63# Array completion element sorting
 64zstyle ':completion:*:*:-subscript-:*' tag-order indexes parameters
 65
 66# Directories
 67zstyle ':completion:*:default' list-colors ${(s.:.)LS_COLORS}
 68zstyle ':completion:*:*:cd:*' ignore-parents parent pwd
 69zstyle ':completion:*:*:cd:*' tag-order local-directories directory-stack path-directories
 70zstyle ':completion:*:*:cd:*:directory-stack' menu yes select
 71zstyle ':completion:*:-tilde-:*' group-order 'named-directories' 'path-directories' 'users' 'expand'
 72zstyle ':completion:*' squeeze-slashes true
 73zstyle ':completion:*' special-dirs true
 74
 75# Environmental variables
 76zstyle ':completion::*:(-command-|export):*' fake-parameters ${${${_comps[(I)-value-*]#*,}%%,*}:#-*-}
 77
 78# Populate hostname completion
 79zstyle -e ':completion:*:hosts' hosts 'reply=(
 80  ${=${=${=${${(f)"$(cat {/etc/ssh_,~/.ssh/known_}hosts(|2)(N) 2>/dev/null)"}%%[#| ]*}//\]:[0-9]*/ }//,/ }//\[/ }
 81  ${=${${${${(@M)${(f)"$(cat ~/.ssh/config 2>/dev/null)"}:#Host *}#Host }:#*\**}:#*\?*}}
 82)'
 83
 84# Don't complete uninteresting users
 85zstyle ':completion:*:*:*:users' ignored-patterns \
 86  adm amanda apache avahi beaglidx bin cacti canna clamav daemon \
 87  dbus distcache dovecot fax ftp games gdm gkrellmd gopher \
 88  hacluster haldaemon halt hsqldb ident junkbust ldap lp mail \
 89  mailman mailnull mldonkey mysql nagios \
 90  named netdump news nfsnobody nobody nscd ntp nut nx openvpn \
 91  operator pcap postfix postgres privoxy pulse pvm quagga radvd \
 92  rpc rpcuser rpm shutdown squid sshd sync uucp vcsa xfs '_*'
 93zstyle '*' single-ignored show
 94
 95# Ignore multiple entries
 96zstyle ':completion:*:(rm|kill|diff):*' ignore-line other
 97zstyle ':completion:*:rm:*' file-patterns '*:all-files'
 98
 99# Man
100zstyle ':completion:*:manuals' separate-sections true
101zstyle ':completion:*:manuals.(^1*)' insert-sections true
102
103# SSH/SCP/RSYNC
104zstyle ':completion:*:(scp|rsync):*' tag-order 'hosts:-host:host hosts:-domain:domain hosts:-ipaddr:ip\ address *'
105zstyle ':completion:*:(scp|rsync):*' group-order users files all-files hosts-domain hosts-host hosts-ipaddr
106zstyle ':completion:*:ssh:*' tag-order 'hosts:-host:host hosts:-domain:domain hosts:-ipaddr:ip\ address *'
107zstyle ':completion:*:ssh:*' group-order users hosts-domain hosts-host users hosts-ipaddr
108zstyle ':completion:*:(ssh|scp|rsync):*:hosts-host' ignored-patterns '*(.|:)*' loopback ip6-loopback localhost ip6-localhost broadcasthost
109zstyle ':completion:*:(ssh|scp|rsync):*:hosts-domain' ignored-patterns '<->.<->.<->.<->' '^[-[:alnum:]]##(.[-[:alnum:]]##)##' '*@*'
110zstyle ':completion:*:(ssh|scp|rsync):*:hosts-ipaddr' ignored-patterns '^(<->.<->.<->.<->|(|::)([[:xdigit:].]##:(#c,2))##(|%*))' '127.0.0.<->' '255.255.255.255' '::1' 'fe80::*'