brew search <user>/<repo> [substring]

For example `brew search homebrew/science` to get a list of all formulae
from that tap, even if not yet tapped.

`brew search <user>/<repo>/<substr>` or
`brew search <user>/<repo> <substr>` to grep for `<substr>`
inside of the tap `<user>/<repo>`.

1 files changed, 23 insertions, 0 deletions

diff --git a/Library/Homebrew/cmd/search.rb b/Library/Homebrew/cmd/search.rb
index f18f21ca3..b2febbdba 100644
--- a/Library/Homebrew/cmd/search.rb
+++ b/Library/Homebrew/cmd/search.rb
@@ -4,6 +4,12 @@ require 'utils'
 require 'utils/json'
 
 module Homebrew extend self
+
+  # A regular expession to capture the username (one or more char but no `/`,
+  # which has to be escaped like `\/`), repository, followed by an optional `/`
+  # and an optional query.
+  TAP_QUERY_REGEX = /^([^\/]+)\/([^\/]+)\/?(.+)?$/
+
   def search
     if ARGV.include? '--macports'
       exec_browser "http://www.macports.org/ports.php?by=name&substr=#{ARGV.next}"
@@ -19,6 +25,23 @@ module Homebrew extend self
       exec_browser "http://packages.ubuntu.com/search?keywords=#{ARGV.next}&searchon=names&suite=all&section=all"
     elsif (query = ARGV.first).nil?
       puts_columns Formula.names
+    elsif ARGV.first =~ TAP_QUERY_REGEX
+      # So look for user/repo/query or list all formulae by the tap
+      # we downcase to avoid case-insensitive filesystem issues.
+      user, repo, query = $1.downcase, $2.downcase, $3
+      tap_dir = HOMEBREW_LIBRARY/"Taps/#{user}-#{repo}"
+      # If, instead of `user/repo/query` the user wrote `user/repo query`:
+      query = ARGV[1] if query.nil?
+      if tap_dir.directory?
+        # There is a local tap already:
+        result = Dir["#{tap_dir}/*.rb"].map{ |f| File.basename(f).chomp('.rb') }
+        result = result.grep(query_regexp(query)) unless query.nil?
+      else
+        # Search online:
+        query = '' if query.nil?
+        result = search_tap(user, repo, query_regexp(query))
+      end
+      puts_columns result
     else
       rx = query_regexp(query)
       local_results = search_formulae(rx)