From f28129b5c96317a0486592011db8e02655b18e1a Mon Sep 17 00:00:00 2001
From: dvs1
Date: Fri, 25 Oct 2024 17:03:00 +1000
Subject: Help command now prints out full usage as well.

---
 _.lua | 41 +++++++++++++++++++++++++++++------------
 1 file changed, 29 insertions(+), 12 deletions(-)

(limited to '_.lua')

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
-- 
cgit v1.1