Show casks in install not found output

- Move `search_names` and `print_missing_formula_help` out of `cmd/search.rb` to `search.rb`
- Change to using those functions in `cmd/install.rb` when a formula or cask doesn't exist

Library/Homebrew/cmd/install.rb

@@ -278,48 +278,26 @@ module Homebrew
     # formula was found, but there's a problem with its implementation).
     $stderr.puts e.backtrace if Homebrew::EnvConfig.developer?
     ofail e.message
-  rescue FormulaOrCaskUnavailableError => e
-    if e.name == "updog"
+  rescue FormulaOrCaskUnavailableError, Cask::CaskUnavailableError => e
+    # formula name or cask token
+    name = e.try(:name) || e.token
+
+    if name == "updog"
       ofail "What's updog?"
       return
     end
 
     opoo e
-    ohai "Searching for similarly named formulae..."
-    formulae_search_results = search_formulae(e.name)
-    case formulae_search_results.length
-    when 0
-      ofail "No similarly named formulae found."
-    when 1
-      puts "This similarly named formula was found:"
-      puts formulae_search_results
-      puts "To install it, run:\n  brew install #{formulae_search_results.first}"
-    else
-      puts "These similarly named formulae were found:"
-      puts Formatter.columns(formulae_search_results)
-      puts "To install one of them, run (for example):\n  brew install #{formulae_search_results.first}"
-    end
+    ohai "Searching for similarly named formulae and casks..."
 
-    if (reason = MissingFormula.reason(e.name))
-      $stderr.puts reason
-      return
-    end
+    # Don't treat formula/cask name as a regex
+    query = string_or_regex = name
+    if search_names(query, string_or_regex, args)
+      puts <<~EOL
 
-    # Do not search taps if the formula name is qualified
-    return if e.name.include?("/")
-
-    taps_search_results = search_taps(e.name)[:formulae]
-    case taps_search_results.length
-    when 0
-      ofail "No formulae found in taps."
-    when 1
-      puts "This formula was found in a tap:"
-      puts taps_search_results
-      puts "To install it, run:\n  brew install #{taps_search_results.first}"
-    else
-      puts "These formulae were found in taps:"
-      puts Formatter.columns(taps_search_results)
-      puts "To install one of them, run (for example):\n  brew install #{taps_search_results.first}"
+        To install one of them, run:
+          brew install 'package_name'
+      EOL
     end
   end
 end

Library/Homebrew/cmd/search.rb

@@ -128,57 +128,4 @@ module Homebrew
 
     GitHub.print_pull_requests_matching(query, only)
   end
-
-  def search_names(query, string_or_regex, args)
-    remote_results = search_taps(query, silent: true)
-
-    local_formulae = search_formulae(string_or_regex)
-    remote_formulae = remote_results[:formulae]
-    all_formulae = local_formulae + remote_formulae
-
-    local_casks = search_casks(string_or_regex)
-    remote_casks = remote_results[:casks]
-    all_casks = local_casks + remote_casks
-
-    print_formulae = args.formula?
-    print_casks = args.cask?
-    print_formulae = print_casks = true if !print_formulae && !print_casks
-    print_formulae &&= all_formulae.any?
-    print_casks &&= all_casks.any?
-
-    if print_formulae
-      if $stdout.tty?
-        ohai "Formulae", Formatter.columns(all_formulae)
-      else
-        puts all_formulae
-      end
-    end
-    puts if print_formulae && print_casks
-    if print_casks
-      if $stdout.tty?
-        ohai "Casks", Formatter.columns(all_casks)
-      else
-        puts all_casks
-      end
-    end
-
-    count = all_formulae.count + all_casks.count
-
-    print_missing_formula_help(query, count.positive?) if local_casks.exclude?(query)
-
-    odie "No formulae or casks found for #{query.inspect}." if count.zero?
-  end
-
-  def print_missing_formula_help(query, found_matches)
-    return unless $stdout.tty?
-
-    reason = MissingFormula.reason(query, silent: true)
-    return if reason.nil?
-
-    if found_matches
-      puts
-      puts "If you meant #{query.inspect} specifically:"
-    end
-    puts reason
-  end
 end

Library/Homebrew/search.rb

@@ -114,6 +114,61 @@ module Homebrew
     def search_casks(_string_or_regex)
       []
     end
+
+    def search_names(query, string_or_regex, args)
+      remote_results = search_taps(query, silent: true)
+
+      local_formulae = search_formulae(string_or_regex)
+      remote_formulae = remote_results[:formulae]
+      all_formulae = local_formulae + remote_formulae
+
+      local_casks = search_casks(string_or_regex)
+      remote_casks = remote_results[:casks]
+      all_casks = local_casks + remote_casks
+
+      print_formulae = args.formula?
+      print_casks = args.cask?
+      print_formulae = print_casks = true if !print_formulae && !print_casks
+      print_formulae &&= all_formulae.any?
+      print_casks &&= all_casks.any?
+
+      count = 0
+      if print_formulae
+        if $stdout.tty?
+          ohai "Formulae", Formatter.columns(all_formulae)
+        else
+          puts all_formulae
+        end
+        count += all_formulae.count
+      end
+      puts if print_formulae && print_casks
+      if print_casks
+        if $stdout.tty?
+          ohai "Casks", Formatter.columns(all_casks)
+        else
+          puts all_casks
+        end
+        count += all_casks.count
+      end
+
+      print_missing_formula_help(query, count.positive?) if local_casks.exclude?(query)
+
+      odie "No formulae or casks found for #{query.inspect}." if count.zero?
+      !count.zero?
+    end
+
+    def print_missing_formula_help(query, found_matches)
+      return unless $stdout.tty?
+
+      reason = MissingFormula.reason(query, silent: true)
+      return if reason.nil?
+
+      if found_matches
+        puts
+        puts "If you meant #{query.inspect} specifically:"
+      end
+      puts reason
+    end
   end
 end