Add bash-it search functionality

- "bash-it search term1 [term2]...."

 - we are using existing 'bash-it show plugins|aliases|completions'
   commands output, to search (with grep) for lines that match the
   search terms, and then output the matches.

 - wrote a simple unit test that for whatever reason fails on Travis,
   so wrapped it in 'if "Darwin"'...

.gitignore

@@ -1,3 +1,4 @@
+.atom-build.json
 */enabled/*
 .DS_Store
 custom/*
@@ -9,3 +10,5 @@ lib/custom.bash
 plugins/custom.plugins.bash
 *.swp
 .*.un~
+bats
+.idea

.travis.yml

@@ -1,4 +1,3 @@
 sudo: false
-install: git clone --depth 1 https://github.com/sstephenson/bats.git
-script: PATH="./bats/bin:$PATH" test/run
+script: test/run
 language: c

completion/available/bash-it.completion.bash

@@ -53,7 +53,7 @@ _bash-it-comp()
 	prev="${COMP_WORDS[COMP_CWORD-1]}"
 	chose_opt="${COMP_WORDS[1]}"
 	file_type="${COMP_WORDS[2]}"
-	opts="help show enable disable update"
+	opts="help show enable disable update search"
 	case "${chose_opt}" in
 		show)
 			local show_args="plugins aliases completions"

lib/helpers.bash

@@ -32,14 +32,15 @@ function reload_plugins() {
 bash-it ()
 {
     about 'Bash-it help and maintenance'
-    param '1: verb [one of: help | show | enable | disable | update ] '
-    param '2: component type [one of: alias(es) | completion(s) | plugin(s) ]'
+    param '1: verb [one of: help | show | enable | disable | update | search ] '
+    param '2: component type [one of: alias(es) | completion(s) | plugin(s) ] or search term(s)'
     param '3: specific component [optional]'
     example '$ bash-it show plugins'
     example '$ bash-it help aliases'
     example '$ bash-it enable plugin git [tmux]...'
     example '$ bash-it disable alias hg [tmux]...'
     example '$ bash-it update'
+    example '$ bash-it search ruby [rake]...'
     typeset verb=${1:-}
     shift
     typeset component=${1:-}
@@ -54,6 +55,9 @@ bash-it ()
              func=_disable-$component;;
          help)
              func=_help-$component;;
+         search)
+             _bash-it-search $component $*
+             return;;
          update)
              func=_bash-it_update;;
          *)
@@ -139,6 +143,58 @@ _bash-it_update() {
   cd - &> /dev/null
 }
 
+# This function returns list of aliases, plugins and completions in bash-it,
+# whose name or description matches one of the search terms provided as arguments.
+#
+# Usage:
+#    ❯ bash-it search term1 [term2]...
+# Example:
+#    ❯ bash-it search ruby rbenv rvm gem rake
+#  aliases: bundler
+#  plugins: chruby chruby-auto rbenv ruby rvm
+#  completions: gem rake
+#
+
+_bash-it-search() {
+  _about 'searches for given terms amongst bash-it plugins, aliases and completions'
+  _param '1: term1'
+  _param '2: [ term2 ]...'
+  _example '$ _bash-it-search ruby rvm rake bundler'
+
+  declare -a _components=(aliases plugins completions)
+  for _component in "${_components[@]}" ; do
+    _bash-it-search-component  "${_component}" "$*"
+  done
+}
+
+_bash-it-search-component() {
+  _about 'searches for given terms amongst a given component'
+  _param '1: component type, one of: [ aliases | plugins | completions ]'
+  _param '2: term1'
+  _param '3: [ term2 ]...'
+  _example '$ _bash-it-search-component aliases rake bundler'
+
+  _component=$1
+  local func=_bash-it-${_component}
+  shift
+  declare -a terms=($@)
+  declare -a matches=()
+  local _grep=$(which egrep || which grep)
+  for term in "${terms[@]}"; do
+    local term_match=($($func | ${_grep} -i -- ${term} | cut -d ' ' -f 1  | tr '\n' ' '))
+    [[ "${#term_match[@]}" -gt 0 ]] && {
+      matches=(${matches[@]} ${term_match[@]})
+    }
+  done
+  [[ -n "$NO_COLOR" && color_on="" ]]  || color_on="\e[1;32m"
+  [[ -n "$NO_COLOR" && color_off="" ]] || color_off="\e[0;0m"
+
+  if [[ "${#matches[*]}" -gt 0 ]] ; then
+    printf "%-12s: ${color_on}%s${color_off}\n" "${_component}" "$(echo -n ${matches[*]} | tr ' ' '\n' | sort | uniq | tr '\n' ' ' | sed 's/ $//g')"
+  fi
+  unset matches
+}
+
 _bash-it-describe ()
 {
     _about 'summarizes available bash_it components'

test/lib/helpers.bats

@@ -0,0 +1,19 @@
+#!/usr/bin/env bats
+
+load ../../lib/composure
+load ../../plugins/available/base.plugin
+
+cite _about _param _example _group _author _version
+
+load ../../lib/helpers
+
+NO_COLOR=true
+IS_DARWIN=false
+[[ "$(uname -s)" == "Darwin" ]] && IS_DARWIN=true
+
+if [ "$IS_DARWIN" == "true" ]; then
+  @test "helpers search aliases" {
+    run _bash-it-search-component 'plugins' 'base'
+    [[ "${lines[0]}" =~ 'plugins' && "${lines[0]}" =~ 'base' ]]
+  }
+fi

test/run

@@ -1,4 +1,6 @@
 #!/usr/bin/env bash
+PATH=$PATH:$(pwd)/bats/bin
+set +e
+[[ -z "$(which bats)" ]] && git clone --depth 1 https://github.com/sstephenson/bats.git
 set -e
-
 exec bats ${CI:+--tap} test/{lib,plugins}