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Improved help message formatting:

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* Do not hardcode formatting constants
* Add margin for multiline descriptions
This commit is contained in:
mpeterv
2014-02-17 15:08:24 +04:00
parent e7aa042004
commit 2afab887a9
1 changed files with 17 additions and 4 deletions
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21
src/argparse.lua
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@@ -335,15 +335,28 @@ function Parser:get_usage()
return self._usage
end
local margin_len = 3
local margin_len2 = 25
local margin = (" "):rep(margin_len)
local margin2 = (" "):rep(margin_len2)
local function make_two_columns(s1, s2)
if s2 == "" then
return " " .. s1
return margin .. s1
end
if #s1 < 22 then
return " " .. s1 .. (" "):rep(22 - #s1) .. s2
s2 = s2:gsub("[\r\n][\r\n]?", function(sub)
if #sub == 1 or sub == "\r\n" then
return "\r\n" .. margin2
else
return "\r\n\r\n" .. margin2
end
end)
if #s1 < (margin_len2-margin_len) then
return margin .. s1 .. (" "):rep(margin_len2-margin_len-#s1) .. s2
else
return " " .. s1 .. "\r\n" .. (" "):rep(25) .. s2
return margin .. s1 .. "\r\n" .. margin2 .. s2
end
end