Customizing completion

custom/completion.zsh

@@ -0,0 +1,36 @@
+# Don't support any matching from the middle of words
+zstyle ':completion:*' matcher-list 'm:{a-zA-Z}={A-Za-z}' 
+
+# We're interested in all processes, not just mine. I'm an SA
+zstyle ':completion:*:*:*:*:processes' command "ps -e -o pid,user,comm -w -w"
+
+# I don't install oh-my-zsh in the default place
+zstyle ':completion::complete:*' cache-path ~/tmp/cache/
+
+# On macs, there are lots of users we dont care about
+# they all start with _
+zstyle ':completion:*:*:*:users' ignored-patterns \
+        $(awk -F: '/^_/ { print $1 }' /etc/passwd)
+
+# On macs, there are lots of groups we dont care about
+# they all start with _
+zstyle ':completion:*:*:*:groups' ignored-patterns \
+        $(awk -F: '/^_/ { print $1 }' /etc/group)
+
+# In addition to the default /etc/hosts, ~/.ssh/known_hosts, we parse
+# ~/.ssh/config and a magic file ~/.host-completion file for additional hosts
+# to complete
+[ -f ~/.ssh/config ] && : ${(A)ssh_config_hosts:=${${${${(@M)${(f)"$(<$HOME/.ssh/config)"}:#Host *}#Host }:#*\**}:#*\?*}}
+[ -r ~/.ssh/known_hosts ] && _ssh_hosts=(${${${${(f)"$(<$HOME/.ssh/known_hosts)"}:#[\|]*}%%\ *}%%,*}) || _ssh_hosts=()
+[ -r ~/.host-completion ] && : ${(A)_host_completion:=${(s: :)${(ps:\t:)${${(f)~~"$(<$HOME/.host-completion)"}%%\#*}##[:blank:]#[^[:blank:]]#}}} || _host_completion=()
+[ -r /etc/hosts ] && : ${(A)_etc_hosts:=${(s: :)${(ps:\t:)${${(f)~~"$(</etc/hosts)"}%%\#*}##[:blank:]#[^[:blank:]]#}}} || _etc_hosts=()
+hosts=(
+  "$_ssh_config_hosts[@]"
+  "$_ssh_hosts[@]"
+  "$_etc_hosts[@]"
+  "$_host_completion[@]"
+  `hostname`
+  localhost
+)
+
+zstyle ':completion:*:hosts' hosts $hosts