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Mark entire option as optional if there is default value

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mpeterv
2014-02-20 12:52:24 +04:00
parent 3e6dc54201
commit d9fc8728ca
2 changed files with 8 additions and 5 deletions
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11
spec/usage_spec.lua
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@@ -43,13 +43,16 @@ describe("tests related to usage message generation", function()
it("creates correct usage message for elements with default value", function() it("creates correct usage message for elements with default value", function()
local parser = Parser "foo" local parser = Parser "foo"
:add_help(false) :add_help(false)
parser:argument "output" parser:argument "input"
:default "a.out" :default "a.in"
parser:option "--from" "-f" parser:option "-f" "--from"
:default "there" :default "there"
parser:option "-o" "--output"
:default "a.out"
:count(1)
assert.equal( assert.equal(
[=[Usage: foo [--from [<from>]] [<output>]]=], [=[Usage: foo [-f [<from>]] [-o [<output>]] [<input>]]=],
parser:prepare():get_usage() parser:prepare():get_usage()
) )
end) end)

2
src/argparse.lua
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@@ -212,7 +212,7 @@ function Option:get_usage()
table.insert(self._usage, 1, self._name) table.insert(self._usage, 1, self._name)
self._usage = table.concat(self._usage, " ") self._usage = table.concat(self._usage, " ")
if self._mincount == 0 then if self._mincount == 0 or self._default then
self._usage = "[" .. self._usage .. "]" self._usage = "[" .. self._usage .. "]"
end end
end end