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<title>System/Console/CmdArgs/Explicit/Help.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-
<a name="line-2"></a>Sample renderings:
<a name="line-3"></a>
<a name="line-4"></a>-- ONE MODE
<a name="line-5"></a>Program description
<a name="line-6"></a>
<a name="line-7"></a>programname [OPTIONS] FILE1 FILE2 [FILES]
<a name="line-8"></a> Program to perform some action
<a name="line-9"></a>
<a name="line-10"></a> -f --flag description
<a name="line-11"></a>Flag grouping:
<a name="line-12"></a> -a --another description
<a name="line-13"></a>
<a name="line-14"></a>
<a name="line-15"></a>-- MANY MODES WITH ONE SHOWN
<a name="line-16"></a>Program description
<a name="line-17"></a>
<a name="line-18"></a>programname [COMMAND] [OPTIONS] ...
<a name="line-19"></a> Program to perform some action
<a name="line-20"></a>
<a name="line-21"></a>Commands:
<a name="line-22"></a> [build] Build action here
<a name="line-23"></a> test Test action here
<a name="line-24"></a>
<a name="line-25"></a>Flags:
<a name="line-26"></a> -s --special Special for the root only
<a name="line-27"></a>Common flags:
<a name="line-28"></a> -? --help Build action here
<a name="line-29"></a>
<a name="line-30"></a>
<a name="line-31"></a>-- MANY MODES WITH ALL SHOWN
<a name="line-32"></a>Program description
<a name="line-33"></a>
<a name="line-34"></a>programname [COMMAND] [OPTIONS] ...
<a name="line-35"></a> Program to perform some action
<a name="line-36"></a>
<a name="line-37"></a> -s --special Special for the root only
<a name="line-38"></a>Common flags:
<a name="line-39"></a> -? --help Build action here
<a name="line-40"></a>
<a name="line-41"></a>programname [build] [OPTIONS] [FILES}
<a name="line-42"></a> Action to perform here
<a name="line-43"></a>-}</span>
<a name="line-44"></a>
<a name="line-45"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Console</span><span class='hs-varop'>.</span><span class='hs-conid'>CmdArgs</span><span class='hs-varop'>.</span><span class='hs-conid'>Explicit</span><span class='hs-varop'>.</span><span class='hs-conid'>Help</span><span class='hs-layout'>(</span><span class='hs-conid'>HelpFormat</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>helpText</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-46"></a>
<a name="line-47"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Console</span><span class='hs-varop'>.</span><span class='hs-conid'>CmdArgs</span><span class='hs-varop'>.</span><span class='hs-conid'>Explicit</span><span class='hs-varop'>.</span><span class='hs-conid'>Type</span>
<a name="line-48"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Console</span><span class='hs-varop'>.</span><span class='hs-conid'>CmdArgs</span><span class='hs-varop'>.</span><span class='hs-conid'>Explicit</span><span class='hs-varop'>.</span><span class='hs-conid'>Complete</span>
<a name="line-49"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Console</span><span class='hs-varop'>.</span><span class='hs-conid'>CmdArgs</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span>
<a name="line-50"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Console</span><span class='hs-varop'>.</span><span class='hs-conid'>CmdArgs</span><span class='hs-varop'>.</span><span class='hs-conid'>Default</span>
<a name="line-51"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span>
<a name="line-52"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Maybe</span>
<a name="line-53"></a>
<a name="line-54"></a>
<a name="line-55"></a><a name="HelpFormat"></a><span class='hs-comment'>-- | Specify the format to output the help.</span>
<a name="line-56"></a><a name="HelpFormat"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>HelpFormat</span>
<a name="line-57"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>HelpFormatDefault</span> <span class='hs-comment'>-- ^ Equivalent to 'HelpFormatAll' if there is not too much text, otherwise 'HelpFormatOne'.</span>
<a name="line-58"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>HelpFormatOne</span> <span class='hs-comment'>-- ^ Display only the first mode.</span>
<a name="line-59"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>HelpFormatAll</span> <span class='hs-comment'>-- ^ Display all modes.</span>
<a name="line-60"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>HelpFormatBash</span> <span class='hs-comment'>-- ^ Bash completion information</span>
<a name="line-61"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>HelpFormatZsh</span> <span class='hs-comment'>-- ^ Z shell completion information</span>
<a name="line-62"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Read</span><span class='hs-layout'>,</span><span class='hs-conid'>Show</span><span class='hs-layout'>,</span><span class='hs-conid'>Enum</span><span class='hs-layout'>,</span><span class='hs-conid'>Bounded</span><span class='hs-layout'>,</span><span class='hs-conid'>Eq</span><span class='hs-layout'>,</span><span class='hs-conid'>Ord</span><span class='hs-layout'>)</span>
<a name="line-63"></a>
<a name="line-64"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Default</span> <span class='hs-conid'>HelpFormat</span> <span class='hs-keyword'>where</span> <span class='hs-varid'>def</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>HelpFormatDefault</span>
<a name="line-65"></a>
<a name="line-66"></a>
<a name="line-67"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show</span> <span class='hs-layout'>(</span><span class='hs-conid'>Mode</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-68"></a> <span class='hs-varid'>show</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>show</span> <span class='hs-varop'>.</span> <span class='hs-varid'>helpTextDefault</span>
<a name="line-69"></a>
<a name="line-70"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show</span> <span class='hs-layout'>(</span><span class='hs-conid'>Flag</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-71"></a> <span class='hs-varid'>show</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>show</span> <span class='hs-varop'>.</span> <span class='hs-varid'>helpFlag</span>
<a name="line-72"></a>
<a name="line-73"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show</span> <span class='hs-layout'>(</span><span class='hs-conid'>Arg</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-74"></a> <span class='hs-varid'>show</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>show</span> <span class='hs-varop'>.</span> <span class='hs-varid'>argType</span>
<a name="line-75"></a>
<a name="line-76"></a><a name="helpText"></a><span class='hs-comment'>-- | Generate a help message from a mode. The first argument is a prefix,</span>
<a name="line-77"></a><span class='hs-comment'>-- which is prepended when not using 'HelpFormatBash' or 'HelpFormatZsh'.</span>
<a name="line-78"></a><span class='hs-definition'>helpText</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>HelpFormat</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Mode</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span>
<a name="line-79"></a><span class='hs-definition'>helpText</span> <span class='hs-varid'>pre</span> <span class='hs-conid'>HelpFormatDefault</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>helpPrefix</span> <span class='hs-varid'>pre</span> <span class='hs-varop'>++</span> <span class='hs-varid'>helpTextDefault</span> <span class='hs-varid'>x</span>
<a name="line-80"></a><span class='hs-definition'>helpText</span> <span class='hs-varid'>pre</span> <span class='hs-conid'>HelpFormatOne</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>helpPrefix</span> <span class='hs-varid'>pre</span> <span class='hs-varop'>++</span> <span class='hs-varid'>helpTextOne</span> <span class='hs-varid'>x</span>
<a name="line-81"></a><span class='hs-definition'>helpText</span> <span class='hs-varid'>pre</span> <span class='hs-conid'>HelpFormatAll</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>helpPrefix</span> <span class='hs-varid'>pre</span> <span class='hs-varop'>++</span> <span class='hs-varid'>helpTextAll</span> <span class='hs-varid'>x</span>
<a name="line-82"></a><span class='hs-definition'>helpText</span> <span class='hs-varid'>pre</span> <span class='hs-conid'>HelpFormatBash</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-conid'>Line</span> <span class='hs-varop'>$</span> <span class='hs-varid'>completeBash</span> <span class='hs-varop'>$</span> <span class='hs-varid'>head</span> <span class='hs-varop'>$</span> <span class='hs-varid'>modeNames</span> <span class='hs-varid'>x</span> <span class='hs-varop'>++</span> <span class='hs-keyglyph'>[</span><span class='hs-str'>"unknown"</span><span class='hs-keyglyph'>]</span>
<a name="line-83"></a><span class='hs-definition'>helpText</span> <span class='hs-varid'>pre</span> <span class='hs-conid'>HelpFormatZsh</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-conid'>Line</span> <span class='hs-varop'>$</span> <span class='hs-varid'>completeZsh</span> <span class='hs-varop'>$</span> <span class='hs-varid'>head</span> <span class='hs-varop'>$</span> <span class='hs-varid'>modeNames</span> <span class='hs-varid'>x</span> <span class='hs-varop'>++</span> <span class='hs-keyglyph'>[</span><span class='hs-str'>"unknown"</span><span class='hs-keyglyph'>]</span>
<a name="line-84"></a>
<a name="line-85"></a>
<a name="line-86"></a><a name="helpPrefix"></a><span class='hs-definition'>helpPrefix</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span>
<a name="line-87"></a><span class='hs-definition'>helpPrefix</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-conid'>Line</span> <span class='hs-varid'>xs</span> <span class='hs-varop'>++</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Line</span> <span class='hs-str'>""</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>not</span> <span class='hs-varop'>$</span> <span class='hs-varid'>null</span> <span class='hs-varid'>xs</span><span class='hs-keyglyph'>]</span>
<a name="line-88"></a>
<a name="line-89"></a>
<a name="line-90"></a><a name="helpTextDefault"></a><span class='hs-definition'>helpTextDefault</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>length</span> <span class='hs-varid'>all</span> <span class='hs-varop'>></span> <span class='hs-num'>40</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>one</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>all</span>
<a name="line-91"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>all</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>helpTextAll</span> <span class='hs-varid'>x</span>
<a name="line-92"></a> <span class='hs-varid'>one</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>helpTextOne</span> <span class='hs-varid'>x</span>
<a name="line-93"></a>
<a name="line-94"></a>
<a name="line-95"></a><a name="helpTextAll"></a><span class='hs-comment'>-- | Help text for all modes</span>
<a name="line-96"></a><span class='hs-comment'>--</span>
<a name="line-97"></a><span class='hs-comment'>-- > <program> [OPTIONS] <file_args></span>
<a name="line-98"></a><span class='hs-comment'>-- > <options></span>
<a name="line-99"></a><span class='hs-comment'>-- > <program> MODE [SUBMODE] [OPTIONS] [FLAG]</span>
<a name="line-100"></a><span class='hs-definition'>helpTextAll</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Mode</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span>
<a name="line-101"></a><span class='hs-definition'>helpTextAll</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>disp</span> <span class='hs-varop'>.</span> <span class='hs-varid'>push</span> <span class='hs-str'>""</span>
<a name="line-102"></a> <span class='hs-keyword'>where</span>
<a name="line-103"></a> <span class='hs-varid'>disp</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>uncurry</span> <span class='hs-layout'>(</span><span class='hs-varop'>++</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>helpTextMode</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-varop'>++</span> <span class='hs-varid'>concatMap</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Line</span> <span class='hs-str'>""</span> <span class='hs-conop'>:</span> <span class='hs-varid'>disp</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>modeModes</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span>
<a name="line-104"></a> <span class='hs-varid'>push</span> <span class='hs-varid'>s</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>m</span><span class='hs-layout'>{</span><span class='hs-varid'>modeNames</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span><span class='hs-varop'>++</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>modeNames</span> <span class='hs-varid'>m</span>
<a name="line-105"></a> <span class='hs-layout'>,</span><span class='hs-varid'>modeGroupModes</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-varid'>push</span> <span class='hs-varid'>s2</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>modeGroupModes</span> <span class='hs-varid'>m</span><span class='hs-layout'>}</span>
<a name="line-106"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>s2</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>s</span> <span class='hs-varop'>++</span> <span class='hs-varid'>concat</span> <span class='hs-layout'>(</span><span class='hs-varid'>take</span> <span class='hs-num'>1</span> <span class='hs-varop'>$</span> <span class='hs-varid'>modeNames</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-varop'>++</span> <span class='hs-str'>" "</span>
<a name="line-107"></a>
<a name="line-108"></a>
<a name="line-109"></a><a name="helpTextOne"></a><span class='hs-comment'>-- | Help text for only this mode</span>
<a name="line-110"></a><span class='hs-comment'>--</span>
<a name="line-111"></a><span class='hs-comment'>-- > <program> [OPTIONS] <file_args></span>
<a name="line-112"></a><span class='hs-comment'>-- > <options></span>
<a name="line-113"></a><span class='hs-comment'>-- > <program> MODE [FLAGS]</span>
<a name="line-114"></a><span class='hs-comment'>-- > <options></span>
<a name="line-115"></a><span class='hs-definition'>helpTextOne</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Mode</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span>
<a name="line-116"></a><span class='hs-definition'>helpTextOne</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pre</span> <span class='hs-varop'>++</span> <span class='hs-varid'>ms</span> <span class='hs-varop'>++</span> <span class='hs-varid'>suf</span>
<a name="line-117"></a> <span class='hs-keyword'>where</span>
<a name="line-118"></a> <span class='hs-layout'>(</span><span class='hs-varid'>pre</span><span class='hs-layout'>,</span><span class='hs-varid'>suf</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>helpTextMode</span> <span class='hs-varid'>m</span>
<a name="line-119"></a> <span class='hs-varid'>ms</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>space</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Line</span> <span class='hs-str'>"Commands:"</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>not</span> <span class='hs-varop'>$</span> <span class='hs-varid'>null</span> <span class='hs-varop'>$</span> <span class='hs-varid'>groupUnnamed</span> <span class='hs-varop'>$</span> <span class='hs-varid'>modeGroupModes</span> <span class='hs-varid'>m</span><span class='hs-keyglyph'>]</span> <span class='hs-varop'>++</span> <span class='hs-varid'>helpGroup</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>modeGroupModes</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span>
<a name="line-120"></a> <span class='hs-varid'>f</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>cols</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>concat</span> <span class='hs-varop'>$</span> <span class='hs-varid'>take</span> <span class='hs-num'>1</span> <span class='hs-varop'>$</span> <span class='hs-varid'>modeNames</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-chr'>' '</span> <span class='hs-conop'>:</span> <span class='hs-varid'>modeHelp</span> <span class='hs-varid'>m</span><span class='hs-keyglyph'>]</span>
<a name="line-121"></a>
<a name="line-122"></a>
<a name="line-123"></a><a name="helpTextMode"></a><span class='hs-definition'>helpTextMode</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Mode</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-124"></a><span class='hs-definition'>helpTextMode</span> <span class='hs-varid'>x</span><span class='hs-keyglyph'>@</span><span class='hs-conid'>Mode</span><span class='hs-layout'>{</span><span class='hs-varid'>modeGroupFlags</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>flags</span><span class='hs-layout'>,</span><span class='hs-varid'>modeGroupModes</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>modes</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>pre</span><span class='hs-layout'>,</span><span class='hs-varid'>suf</span><span class='hs-layout'>)</span>
<a name="line-125"></a> <span class='hs-keyword'>where</span>
<a name="line-126"></a> <span class='hs-varid'>pre</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Line</span> <span class='hs-varop'>$</span> <span class='hs-varid'>unwords</span> <span class='hs-varop'>$</span> <span class='hs-varid'>take</span> <span class='hs-num'>1</span> <span class='hs-layout'>(</span><span class='hs-varid'>modeNames</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varop'>++</span>
<a name="line-127"></a> <span class='hs-keyglyph'>[</span><span class='hs-str'>"[COMMAND] ..."</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>notNullGroup</span> <span class='hs-varid'>modes</span><span class='hs-keyglyph'>]</span> <span class='hs-varop'>++</span>
<a name="line-128"></a> <span class='hs-keyglyph'>[</span><span class='hs-str'>"[OPTIONS]"</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>not</span> <span class='hs-varop'>$</span> <span class='hs-varid'>null</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fromGroup</span> <span class='hs-varid'>flags</span><span class='hs-keyglyph'>]</span> <span class='hs-varop'>++</span>
<a name="line-129"></a> <span class='hs-varid'>helpArgs</span> <span class='hs-layout'>(</span><span class='hs-varid'>modeArgs</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <span class='hs-varop'>++</span>
<a name="line-130"></a> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Line</span> <span class='hs-varop'>$</span> <span class='hs-str'>" "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>modeHelp</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>not</span> <span class='hs-varop'>$</span> <span class='hs-varid'>null</span> <span class='hs-varop'>$</span> <span class='hs-varid'>modeHelp</span> <span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span>
<a name="line-131"></a> <span class='hs-varid'>suf</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>space</span>
<a name="line-132"></a> <span class='hs-layout'>(</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>Line</span> <span class='hs-str'>"Flags:"</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>mixedGroup</span> <span class='hs-varid'>flags</span><span class='hs-keyglyph'>]</span> <span class='hs-varop'>++</span>
<a name="line-133"></a> <span class='hs-varid'>helpGroup</span> <span class='hs-varid'>helpFlag</span> <span class='hs-layout'>(</span><span class='hs-varid'>modeGroupFlags</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varop'>++</span>
<a name="line-134"></a> <span class='hs-varid'>space</span> <span class='hs-layout'>(</span><span class='hs-varid'>map</span> <span class='hs-conid'>Line</span> <span class='hs-varop'>$</span> <span class='hs-varid'>modeHelpSuffix</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-135"></a>
<a name="line-136"></a>
<a name="line-137"></a><a name="helpGroup"></a><span class='hs-definition'>helpGroup</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Group</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span>
<a name="line-138"></a><span class='hs-definition'>helpGroup</span> <span class='hs-varid'>f</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>concatMap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>groupUnnamed</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-varop'>++</span> <span class='hs-varid'>concatMap</span> <span class='hs-varid'>g</span> <span class='hs-layout'>(</span><span class='hs-varid'>groupNamed</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span>
<a name="line-139"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>g</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Line</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varop'>++</span> <span class='hs-str'>":"</span><span class='hs-layout'>)</span> <span class='hs-conop'>:</span> <span class='hs-varid'>concatMap</span> <span class='hs-varid'>f</span> <span class='hs-varid'>b</span>
<a name="line-140"></a>
<a name="line-141"></a>
<a name="line-142"></a><a name="helpArgs"></a><span class='hs-definition'>helpArgs</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>Arg</span> <span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Arg</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span>
<a name="line-143"></a><span class='hs-definition'>helpArgs</span> <span class='hs-layout'>(</span><span class='hs-varid'>ys</span><span class='hs-layout'>,</span><span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-keyglyph'>[</span><span class='hs-chr'>'['</span><span class='hs-keyglyph'>|</span><span class='hs-varid'>r</span><span class='hs-keyglyph'>]</span> <span class='hs-varop'>++</span> <span class='hs-varid'>argType</span> <span class='hs-varid'>x</span> <span class='hs-varop'>++</span> <span class='hs-keyglyph'>[</span><span class='hs-chr'>']'</span><span class='hs-keyglyph'>|</span><span class='hs-varid'>r</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>|</span> <span class='hs-layout'>(</span><span class='hs-varid'>i</span><span class='hs-layout'>,</span><span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>zip</span> <span class='hs-keyglyph'>[</span><span class='hs-num'>0</span><span class='hs-keyglyph'>..</span><span class='hs-keyglyph'>]</span> <span class='hs-varid'>xs</span><span class='hs-layout'>,</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>req</span> <span class='hs-varop'>></span> <span class='hs-varid'>i</span><span class='hs-keyglyph'>]</span>
<a name="line-144"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ys</span> <span class='hs-varop'>++</span> <span class='hs-varid'>maybeToList</span> <span class='hs-varid'>y</span>
<a name="line-145"></a> <span class='hs-varid'>req</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>maximum</span> <span class='hs-varop'>$</span> <span class='hs-num'>0</span> <span class='hs-conop'>:</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>i</span> <span class='hs-keyglyph'>|</span> <span class='hs-layout'>(</span><span class='hs-varid'>i</span><span class='hs-layout'>,</span><span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>zip</span> <span class='hs-keyglyph'>[</span><span class='hs-num'>1</span><span class='hs-keyglyph'>..</span><span class='hs-keyglyph'>]</span> <span class='hs-varid'>xs</span><span class='hs-layout'>,</span> <span class='hs-varid'>argRequire</span> <span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span>
<a name="line-146"></a>
<a name="line-147"></a>
<a name="line-148"></a><a name="helpFlag"></a><span class='hs-definition'>helpFlag</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Flag</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span>
<a name="line-149"></a><span class='hs-definition'>helpFlag</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>cols</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>unwords</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-str'>"-"</span><span class='hs-varop'>++</span><span class='hs-layout'>)</span> <span class='hs-varid'>a2</span><span class='hs-layout'>,</span> <span class='hs-varid'>unwords</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-str'>"--"</span><span class='hs-varop'>++</span><span class='hs-layout'>)</span> <span class='hs-varid'>b2</span><span class='hs-layout'>,</span> <span class='hs-chr'>' '</span> <span class='hs-conop'>:</span> <span class='hs-varid'>flagHelp</span> <span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span><span class='hs-keyglyph'>]</span>
<a name="line-150"></a> <span class='hs-keyword'>where</span>
<a name="line-151"></a> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>partition</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>==</span><span class='hs-layout'>)</span> <span class='hs-num'>1</span> <span class='hs-varop'>.</span> <span class='hs-varid'>length</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>flagNames</span> <span class='hs-varid'>x</span>
<a name="line-152"></a> <span class='hs-layout'>(</span><span class='hs-varid'>a2</span><span class='hs-layout'>,</span><span class='hs-varid'>b2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>null</span> <span class='hs-varid'>b</span> <span class='hs-keyword'>then</span> <span class='hs-layout'>(</span><span class='hs-varid'>add</span> <span class='hs-varid'>a</span> <span class='hs-varid'>opt</span><span class='hs-layout'>,</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyword'>else</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-varid'>add</span> <span class='hs-varid'>b</span> <span class='hs-varid'>opt</span><span class='hs-layout'>)</span>
<a name="line-153"></a> <span class='hs-varid'>add</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>null</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>else</span> <span class='hs-layout'>(</span><span class='hs-varid'>head</span> <span class='hs-varid'>x</span> <span class='hs-varop'>++</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-conop'>:</span> <span class='hs-varid'>tail</span> <span class='hs-varid'>x</span>
<a name="line-154"></a> <span class='hs-varid'>hlp</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>null</span> <span class='hs-layout'>(</span><span class='hs-varid'>flagType</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyword'>then</span> <span class='hs-str'>"ITEM"</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>flagType</span> <span class='hs-varid'>x</span>
<a name="line-155"></a> <span class='hs-varid'>opt</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>flagInfo</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span>
<a name="line-156"></a> <span class='hs-conid'>FlagReq</span> <span class='hs-keyglyph'>-></span> <span class='hs-chr'>'='</span> <span class='hs-conop'>:</span> <span class='hs-varid'>hlp</span>
<a name="line-157"></a> <span class='hs-conid'>FlagOpt</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>"[="</span> <span class='hs-varop'>++</span> <span class='hs-varid'>hlp</span> <span class='hs-varop'>++</span> <span class='hs-str'>"]"</span>
<a name="line-158"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>""</span>
<a name="line-159"></a>
<a name="line-160"></a><a name="cols"></a><span class='hs-definition'>cols</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Cols</span> <span class='hs-varop'>$</span> <span class='hs-layout'>(</span><span class='hs-str'>" "</span><span class='hs-varop'>++</span><span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-conop'>:</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-chr'>' '</span><span class='hs-conop'>:</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span>
<a name="line-161"></a><a name="space"></a><span class='hs-definition'>space</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Line</span> <span class='hs-str'>""</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>not</span> <span class='hs-varop'>$</span> <span class='hs-varid'>null</span> <span class='hs-varid'>xs</span><span class='hs-keyglyph'>]</span> <span class='hs-varop'>++</span> <span class='hs-varid'>xs</span>
<a name="line-162"></a>
<a name="line-163"></a>
<a name="line-164"></a><a name="nullGroup"></a><span class='hs-definition'>nullGroup</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>null</span> <span class='hs-layout'>(</span><span class='hs-varid'>groupUnnamed</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>null</span> <span class='hs-layout'>(</span><span class='hs-varid'>groupNamed</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-165"></a><a name="notNullGroup"></a><span class='hs-definition'>notNullGroup</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>not</span> <span class='hs-varop'>.</span> <span class='hs-varid'>nullGroup</span>
<a name="line-166"></a><a name="mixedGroup"></a><span class='hs-definition'>mixedGroup</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>not</span> <span class='hs-varop'>$</span> <span class='hs-varid'>null</span> <span class='hs-layout'>(</span><span class='hs-varid'>groupUnnamed</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varop'>||</span> <span class='hs-varid'>null</span> <span class='hs-layout'>(</span><span class='hs-varid'>groupNamed</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- has both unnamed and named</span>
</pre></body>
</html>
distrib
>
Fedora
>
17
>
i386
>
media
>
updates
>
by-pkgid
>
a754cb499dfee5e1f453d3b6cc13d4c8
>
files
>
147
