1 files changed, 29 insertions, 12 deletions

diff --git a/_.lua b/_.lua
index 03761d2..945f4f2 100755
--- a/_.lua
+++ b/_.lua
@@ -28,14 +28,15 @@ C = function(s)	print('CRITICAL ' .. s); io.flush() end
 
 local optionsCommon =
 {
-    help =      {help = 'Print the help text',
-        func = function(self, a, args, i)
+    help =      {help = 'Print the help text.',
+        func = function(self, options, a, args, i)
             print(Help)
+            _.usage(args, options, true)
             os.exit(0)
         end
     },
     ['--version'] =     {help = 'Print the version details.',
-        func = function(self, a, args, i)
+        func = function(self, options, a, args, i)
             print('This is version ' ..Version .. ' of ' .. args[0])
             os.exit(0)
         end
@@ -43,6 +44,29 @@ local optionsCommon =
 }
 optionsCommon['--help'] = optionsCommon['help']
 
+_.usage = function(args, options, all)
+        local h = ''
+        for k, v in pairs(options) do
+            if 'table' == type(v) then h = h .. k .. ' | ' end
+        end
+        for k, v in pairs(optionsCommon) do
+            if 'table' == type(v) then h = h .. k .. ' | ' end
+        end
+        print('Usage: ' .. args[0] .. ' {' .. string.sub(h, 1, -2) .. '}')
+        if true == all then
+            for k, v in pairs(options) do
+                if 'table' == type(v) then
+                    if nil ~= v.help then print(k .. '\t\t' .. v.help) end
+                end
+            end
+            for k, v in pairs(optionsCommon) do
+                if 'table' == type(v) then
+                    if nil ~= v.help then print(k .. '\t\t' .. v.help) end
+                end
+            end
+        end
+end
+
 _.parse = function(args, options, confFile)
     local o = nil
 
@@ -51,7 +75,7 @@ _.parse = function(args, options, confFile)
             if nil == o then o = optionsCommon[name] end
             if nil ~= o then
                 if nil ~= val then o.value = val; D(name .. ' = ' .. tostring(val)) end
-                if nil ~= o.func then o:func(a, args, i) end
+                if nil ~= o.func then o:func(options, a, args, i) end
             end
         return o
     end
@@ -85,14 +109,7 @@ _.parse = function(args, options, confFile)
     end
 
     if nil == o then
-        local h = ''
-        for k, v in pairs(options) do
-            if 'table' == type(v) then h = h .. k .. ' | ' end
-        end
-        for k, v in pairs(optionsCommon) do
-            if 'table' == type(v) then h = h .. k .. ' | ' end
-        end
-        print('Usage: ' .. args[0] .. ' {' .. string.sub(h, 1, -2) .. '}')
+        _.usage(args, options)
         os.exit(0)
     end
 end