rbinstall.rb: Show types to install in the help [ci skip]

1 files changed, 14 insertions, 0 deletions

diff --git a/tool/rbinstall.rb b/tool/rbinstall.rb
index 90697bfe92..8263eefb0d 100755
--- a/tool/rbinstall.rb
+++ b/tool/rbinstall.rb
@@ -96,6 +96,20 @@ def parse_args(argv = ARGV)
   opt.on('--gnumake') {gnumake = true}
   opt.on('--debug-symbols=SUFFIX', /\w+/) {|name| $debug_symbols = ".#{name}"}
 
+  unless $install_procs.empty?
+    w = (w = ENV["COLUMNS"] and (w = w.to_i) > 80 ? w - 30 : 50)
+    opt.on("\n""Types for --install and --exclude:")
+    mesg = " "
+    $install_procs.each_key do |t|
+      if mesg.size + t.size > w
+        opt.on(mesg)
+        mesg = " "
+      end
+      mesg << " " << t.to_s
+    end
+    opt.on(mesg)
+  end
+
   opt.order!(argv) do |v|
     case v
     when /\AINSTALL[-_]([-\w]+)=(.*)/