Add brackets to argname automatically

Updated aux files

.travis.yml

@@ -9,7 +9,8 @@ before_install:
   - bash .travis_setup.sh
 
 install:
-  - sudo luarocks make rockspecs/argparse-git-1.rockspec
+  - sudo luarocks make rockspecs/argparse-scm-1.rockspec
   - sudo luarocks install busted
 
-script: "busted spec"
+script:
+  - busted spec

.travis_setup.sh

@@ -5,8 +5,7 @@
 if [ "$LUA" == "LuaJIT 2.0" ]; then
   curl http://luajit.org/download/LuaJIT-2.0.2.tar.gz | tar xz
   cd LuaJIT-2.0.2
-  make && sudo make install INSTALL_TSYMNAME=lua
-  cd ..;
+  make && sudo make install INSTALL_TSYMNAME=lua;
 else
   if [ "$LUA" == "Lua 5.1" ]; then
     curl http://www.lua.org/ftp/lua-5.1.5.tar.gz | tar xz
@@ -15,13 +14,12 @@ else
     curl http://www.lua.org/ftp/lua-5.2.3.tar.gz | tar xz
     cd lua-5.2.3;
   fi
-
-  sudo make linux install
-  cd ..;
+  sudo make linux install;
 fi
 
-curl http://luarocks.org/releases/luarocks-2.1.1.tar.gz | tar xz
-cd luarocks-2.1.1
+cd ..
+curl http://luarocks.org/releases/luarocks-2.1.2.tar.gz | tar xz
+cd luarocks-2.1.2
 
 if [ "$LUA" == "LuaJIT 2.0" ]; then
   ./configure --with-lua-include=/usr/local/include/luajit-2.0;

rockspecs/argparse-scm-1.rockspec

@@ -1,5 +1,5 @@
 package = "argparse"
-version = "git-1"
+version = "scm-1"
 source = {
    url = "git://github.com/mpeterv/argparse.git"
 }

spec/usage_spec.lua

@@ -136,7 +136,7 @@ describe("tests related to usage message generation", function()
             :add_help(false)
          parser:argument "inputs"
             :args "1-2"
-            :argname "<input>"
+            :argname "input"
 
          assert.equal(
             [=[Usage: foo <input> [<input>]]=],
@@ -150,7 +150,7 @@ describe("tests related to usage message generation", function()
          parser:option "--pair"
             :args(2)
             :count "*"
-            :argname{"<key>", "<value>"}
+            :argname{"key", "value"}
 
          assert.equal(
             [=[Usage: foo [--pair <key> <value>]]=],

src/argparse.lua

@@ -31,7 +31,7 @@ do -- Create classes with setters
                   self._name = name_or_options
                end
             elseif type(name_or_options) == "table" then
-               for field, setter in pairs(fields) do
+               for field in pairs(fields) do
                   if name_or_options[field] ~= nil then
                      self[field](self, name_or_options[field])
                   end
@@ -229,7 +229,7 @@ function Argument:_get_argument_list()
    local i = 1
 
    while i <= math.min(self._minargs, 3) do
-      local argname = self:_get_argname_i(i)
+      local argname = self:_get_argname(i)
 
       if self._default and self._defmode:find "a" then
          argname = "[" .. argname .. "]"
@@ -240,7 +240,7 @@ function Argument:_get_argument_list()
    end
 
    while i <= math.min(self._maxargs, 3) do
-      table.insert(buf, "[" .. self:_get_argname_i(i) .. "]")
+      table.insert(buf, "[" .. self:_get_argname(i) .. "]")
       i = i+1
 
       if self._maxargs == math.huge then
@@ -287,24 +287,26 @@ function Argument:_get_type()
    end
 end
 
-function Argument:_get_argname_i(i)
-   local argname = self:_get_argname()
+-- Returns placeholder for `narg`-th argument. 
+function Argument:_get_argname(narg)
+   local argname = self._argname or self:_get_default_argname()
 
    if type(argname) == "table" then
-      return argname[i]
+      return "<" .. argname[narg] .. ">"
    else
-      return argname
+      return "<" .. argname .. ">"
    end
 end
 
-function Argument:_get_argname()
-   return self._argname or ("<"..self._name..">")
+function Argument:_get_default_argname()
+   return self._name
 end
 
-function Option:_get_argname()
-   return self._argname or ("<"..self:_get_target()..">")
+function Option:_get_default_argname()
+   return self:_get_target()
 end
 
+-- Returns label to be shown in the help message. 
 function Argument:_get_label()
    return self._name
 end
@@ -954,7 +956,7 @@ end
 function Parser:pparse(args)
    local errmsg
    local ok, result = pcall(function()
-      return self:_parse(args, function(parser, err)
+      return self:_parse(args, function(_, err)
          errmsg = err
          return error()
       end)