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prezto/modules/explainshell/init.zsh

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#
# Adds a explain function and explainshell widget
#
# Authors
# C Lentfort
#
function _expand_alias_recursive {
local _alias
for word in "$@"; do
# Check if word is aliased
_alias=$aliases[$word]
if [ -n "$_alias" ]; then
# Check if found alias and given command are identical
if [[ "$_alias" != "${(j: :)@}" ]]; then
_expand_alias_recursive "${(z)_alias}"
else
_explainshell_expanded_buffer+=$1
fi
else
_explainshell_expanded_buffer+=$word
fi
done
}
function explain {
local url
# We don't explain empty buffers
if (( $# == 0 )); then
return 1;
fi
# Replace aliases with their actual expansions
_explainshell_expanded_buffer=()
_expand_alias_recursive $@
_explainshell_expanded_buffer=(${(u)_explainshell_expanded_buffer})
# base url with first command already injected
# $ explain tar
# => http://explainshel.com/explain/tar?args=
url="http://explainshell.com/explain?cmd="
# iterates over remaining args and adds builds the rest of the url
for i in "$_explainshell_expanded_buffer"; do
url=$url"$i""+"
done
unset _explainshell_expanded_buffer
# opens url in browser
$BROWSER -t $url &> /dev/null
}
function explainshell {
explain ${(z)BUFFER}
}
zle -N explainshell
zstyle -s ':prezto:module:explainshell' key-binding 'key_binding'
if [[ -n "$key_binding" ]]; then
bindkey "$key_binding" explainshell
fi
unset key_binding