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authorRobin H. Johnson <robbat2@gentoo.org>2015-08-08 13:49:04 -0700
committerRobin H. Johnson <robbat2@gentoo.org>2015-08-08 17:38:18 -0700
commit56bd759df1d0c750a065b8c845e93d5dfa6b549d (patch)
tree3f91093cdb475e565ae857f1c5a7fd339e2d781e /dev-haskell/options/metadata.xml
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proj/gentoo: Initial commit
This commit represents a new era for Gentoo: Storing the gentoo-x86 tree in Git, as converted from CVS. This commit is the start of the NEW history. Any historical data is intended to be grafted onto this point. Creation process: 1. Take final CVS checkout snapshot 2. Remove ALL ChangeLog* files 3. Transform all Manifests to thin 4. Remove empty Manifests 5. Convert all stale $Header$/$Id$ CVS keywords to non-expanded Git $Id$ 5.1. Do not touch files with -kb/-ko keyword flags. Signed-off-by: Robin H. Johnson <robbat2@gentoo.org> X-Thanks: Alec Warner <antarus@gentoo.org> - did the GSoC 2006 migration tests X-Thanks: Robin H. Johnson <robbat2@gentoo.org> - infra guy, herding this project X-Thanks: Nguyen Thai Ngoc Duy <pclouds@gentoo.org> - Former Gentoo developer, wrote Git features for the migration X-Thanks: Brian Harring <ferringb@gentoo.org> - wrote much python to improve cvs2svn X-Thanks: Rich Freeman <rich0@gentoo.org> - validation scripts X-Thanks: Patrick Lauer <patrick@gentoo.org> - Gentoo dev, running new 2014 work in migration X-Thanks: Michał Górny <mgorny@gentoo.org> - scripts, QA, nagging X-Thanks: All of other Gentoo developers - many ideas and lots of paint on the bikeshed
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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+ <herd>haskell</herd>
+ <longdescription>
+ The @options@ package lets library and application developers easily work
+ with command-line options.
+
+ The following example is a full program that can accept two options,
+ @--message@ and @--quiet@:
+
+ @
+ import Control.Applicative
+ import Options
+
+ data MainOptions = MainOptions
+ &amp;#x20; &amp;#x7b; optMessage :: String
+ &amp;#x20; , optQuiet :: Bool
+ &amp;#x20; &amp;#x7d;
+
+ instance &#39;Options&#39; MainOptions where
+ &amp;#x20; defineOptions = pure MainOptions
+ &amp;#x20; \&lt;*\&gt; simpleOption \&quot;message\&quot; \&quot;Hello world!\&quot;
+ &amp;#x20; \&quot;A message to show the user.\&quot;
+ &amp;#x20; \&lt;*\&gt; simpleOption \&quot;quiet\&quot; False
+ &amp;#x20; \&quot;Whether to be quiet.\&quot;
+
+ main :: IO ()
+ main = runCommand $ \\opts args -&gt; do
+ &amp;#x20; if optQuiet opts
+ &amp;#x20; then return ()
+ &amp;#x20; else putStrLn (optMessage opts)
+ @
+
+ &gt;$ ./hello
+ &gt;Hello world!
+ &gt;$ ./hello --message=&#39;ciao mondo&#39;
+ &gt;ciao mondo
+ &gt;$ ./hello --quiet
+ &gt;$
+
+ In addition, this library will automatically create documentation options
+ such as @--help@ and @--help-all@:
+
+ &gt;$ ./hello --help
+ &gt;Help Options:
+ &gt; -h, --help
+ &gt; Show option summary.
+ &gt; --help-all
+ &gt; Show all help options.
+ &gt;
+ &gt;Application Options:
+ &gt; --message :: text
+ &gt; A message to show the user.
+ &gt; default: &quot;Hello world!&quot;
+ &gt; --quiet :: bool
+ &gt; Whether to be quiet.
+ &gt; default: false
+ </longdescription>
+</pkgmetadata>