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<pre><a name="line-1"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-2"></a><span class='hs-comment'>-- |</span>
<a name="line-3"></a><span class='hs-comment'>-- Module : Distribution.Package</span>
<a name="line-4"></a><span class='hs-comment'>-- Copyright : Isaac Jones 2003-2004</span>
<a name="line-5"></a><span class='hs-comment'>--</span>
<a name="line-6"></a><span class='hs-comment'>-- Maintainer : cabal-devel@haskell.org</span>
<a name="line-7"></a><span class='hs-comment'>-- Portability : portable</span>
<a name="line-8"></a><span class='hs-comment'>--</span>
<a name="line-9"></a><span class='hs-comment'>-- Defines a package identifier along with a parser and pretty printer for it.</span>
<a name="line-10"></a><span class='hs-comment'>-- 'PackageIdentifier's consist of a name and an exact version. It also defines</span>
<a name="line-11"></a><span class='hs-comment'>-- a 'Dependency' data type. A dependency is a package name and a version</span>
<a name="line-12"></a><span class='hs-comment'>-- range, like @\"foo >= 1.2 && < 2\"@.</span>
<a name="line-13"></a>
<a name="line-14"></a><span class='hs-comment'>{- All rights reserved.
<a name="line-15"></a>
<a name="line-16"></a>Redistribution and use in source and binary forms, with or without
<a name="line-17"></a>modification, are permitted provided that the following conditions are
<a name="line-18"></a>met:
<a name="line-19"></a>
<a name="line-20"></a> * Redistributions of source code must retain the above copyright
<a name="line-21"></a> notice, this list of conditions and the following disclaimer.
<a name="line-22"></a>
<a name="line-23"></a> * Redistributions in binary form must reproduce the above
<a name="line-24"></a> copyright notice, this list of conditions and the following
<a name="line-25"></a> disclaimer in the documentation and/or other materials provided
<a name="line-26"></a> with the distribution.
<a name="line-27"></a>
<a name="line-28"></a> * Neither the name of Isaac Jones nor the names of other
<a name="line-29"></a> contributors may be used to endorse or promote products derived
<a name="line-30"></a> from this software without specific prior written permission.
<a name="line-31"></a>
<a name="line-32"></a>THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
<a name="line-33"></a>"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
<a name="line-34"></a>LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
<a name="line-35"></a>A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
<a name="line-36"></a>OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
<a name="line-37"></a>SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
<a name="line-38"></a>LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
<a name="line-39"></a>DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
<a name="line-40"></a>THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
<a name="line-41"></a>(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
<a name="line-42"></a>OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -}</span>
<a name="line-43"></a>
<a name="line-44"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Distribution</span><span class='hs-varop'>.</span><span class='hs-conid'>Package</span> <span class='hs-layout'>(</span>
<a name="line-45"></a> <span class='hs-comment'>-- * Package ids</span>
<a name="line-46"></a> <span class='hs-conid'>PackageName</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-47"></a> <span class='hs-conid'>PackageIdentifier</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-48"></a> <span class='hs-conid'>PackageId</span><span class='hs-layout'>,</span>
<a name="line-49"></a>
<a name="line-50"></a> <span class='hs-comment'>-- * Installed package identifiers</span>
<a name="line-51"></a> <span class='hs-conid'>InstalledPackageId</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-52"></a>
<a name="line-53"></a> <span class='hs-comment'>-- * Package source dependencies</span>
<a name="line-54"></a> <span class='hs-conid'>Dependency</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-55"></a> <span class='hs-varid'>thisPackageVersion</span><span class='hs-layout'>,</span>
<a name="line-56"></a> <span class='hs-varid'>notThisPackageVersion</span><span class='hs-layout'>,</span>
<a name="line-57"></a> <span class='hs-varid'>simplifyDependency</span><span class='hs-layout'>,</span>
<a name="line-58"></a>
<a name="line-59"></a> <span class='hs-comment'>-- * Package classes</span>
<a name="line-60"></a> <span class='hs-conid'>Package</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'>packageName</span><span class='hs-layout'>,</span> <span class='hs-varid'>packageVersion</span><span class='hs-layout'>,</span>
<a name="line-61"></a> <span class='hs-conid'>PackageFixedDeps</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-62"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-63"></a>
<a name="line-64"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Distribution</span><span class='hs-varop'>.</span><span class='hs-conid'>Version</span>
<a name="line-65"></a> <span class='hs-layout'>(</span> <span class='hs-conid'>Version</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>VersionRange</span><span class='hs-layout'>,</span> <span class='hs-varid'>anyVersion</span><span class='hs-layout'>,</span> <span class='hs-varid'>thisVersion</span>
<a name="line-66"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>notThisVersion</span><span class='hs-layout'>,</span> <span class='hs-varid'>simplifyVersionRange</span> <span class='hs-layout'>)</span>
<a name="line-67"></a>
<a name="line-68"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Distribution</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span> <span class='hs-layout'>(</span><span class='hs-conid'>Text</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-69"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Distribution</span><span class='hs-varop'>.</span><span class='hs-conid'>Compat</span><span class='hs-varop'>.</span><span class='hs-conid'>ReadP</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>Parse</span>
<a name="line-70"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Distribution</span><span class='hs-varop'>.</span><span class='hs-conid'>Compat</span><span class='hs-varop'>.</span><span class='hs-conid'>ReadP</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'><++</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-71"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>PrettyPrint</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>Disp</span>
<a name="line-72"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>PrettyPrint</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'><></span><span class='hs-layout'>)</span><span class='hs-layout'>,</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'>text</span><span class='hs-layout'>)</span>
<a name="line-73"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Char</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>Char</span> <span class='hs-layout'>(</span> <span class='hs-varid'>isDigit</span><span class='hs-layout'>,</span> <span class='hs-varid'>isAlphaNum</span> <span class='hs-layout'>)</span>
<a name="line-74"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span> <span class='hs-layout'>(</span> <span class='hs-varid'>intersperse</span> <span class='hs-layout'>)</span>
<a name="line-75"></a>
<a name="line-76"></a><a name="PackageName"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>PackageName</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PackageName</span> <span class='hs-conid'>String</span>
<a name="line-77"></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'>Eq</span><span class='hs-layout'>,</span> <span class='hs-conid'>Ord</span><span class='hs-layout'>)</span>
<a name="line-78"></a>
<a name="line-79"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Text</span> <span class='hs-conid'>PackageName</span> <span class='hs-keyword'>where</span>
<a name="line-80"></a> <span class='hs-varid'>disp</span> <span class='hs-layout'>(</span><span class='hs-conid'>PackageName</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Disp</span><span class='hs-varop'>.</span><span class='hs-varid'>text</span> <span class='hs-varid'>n</span>
<a name="line-81"></a> <span class='hs-varid'>parse</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-82"></a> <span class='hs-varid'>ns</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>Parse</span><span class='hs-varop'>.</span><span class='hs-varid'>sepBy1</span> <span class='hs-varid'>component</span> <span class='hs-layout'>(</span><span class='hs-conid'>Parse</span><span class='hs-varop'>.</span><span class='hs-varid'>char</span> <span class='hs-chr'>'-'</span><span class='hs-layout'>)</span>
<a name="line-83"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>PackageName</span> <span class='hs-layout'>(</span><span class='hs-varid'>concat</span> <span class='hs-layout'>(</span><span class='hs-varid'>intersperse</span> <span class='hs-str'>"-"</span> <span class='hs-varid'>ns</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-84"></a> <span class='hs-keyword'>where</span>
<a name="line-85"></a> <span class='hs-varid'>component</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-86"></a> <span class='hs-varid'>cs</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>Parse</span><span class='hs-varop'>.</span><span class='hs-varid'>munch1</span> <span class='hs-conid'>Char</span><span class='hs-varop'>.</span><span class='hs-varid'>isAlphaNum</span>
<a name="line-87"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>all</span> <span class='hs-conid'>Char</span><span class='hs-varop'>.</span><span class='hs-varid'>isDigit</span> <span class='hs-varid'>cs</span> <span class='hs-keyword'>then</span> <span class='hs-conid'>Parse</span><span class='hs-varop'>.</span><span class='hs-varid'>pfail</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-varid'>cs</span>
<a name="line-88"></a> <span class='hs-comment'>-- each component must contain an alphabetic character, to avoid</span>
<a name="line-89"></a> <span class='hs-comment'>-- ambiguity in identifiers like foo-1 (the 1 is the version number).</span>
<a name="line-90"></a>
<a name="line-91"></a><a name="PackageId"></a><span class='hs-comment'>-- | Type alias so we can use the shorter name PackageId.</span>
<a name="line-92"></a><a name="PackageId"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>PackageId</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PackageIdentifier</span>
<a name="line-93"></a>
<a name="line-94"></a><a name="PackageIdentifier"></a><span class='hs-comment'>-- | The name and version of a package.</span>
<a name="line-95"></a><a name="PackageIdentifier"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>PackageIdentifier</span>
<a name="line-96"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PackageIdentifier</span> <span class='hs-layout'>{</span>
<a name="line-97"></a> <span class='hs-varid'>pkgName</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>PackageName</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- ^The name of this package, eg. foo</span>
<a name="line-98"></a> <span class='hs-varid'>pkgVersion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Version</span> <span class='hs-comment'>-- ^the version of this package, eg 1.2</span>
<a name="line-99"></a> <span class='hs-layout'>}</span>
<a name="line-100"></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'>Eq</span><span class='hs-layout'>,</span> <span class='hs-conid'>Ord</span><span class='hs-layout'>)</span>
<a name="line-101"></a>
<a name="line-102"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Text</span> <span class='hs-conid'>PackageIdentifier</span> <span class='hs-keyword'>where</span>
<a name="line-103"></a> <span class='hs-varid'>disp</span> <span class='hs-layout'>(</span><span class='hs-conid'>PackageIdentifier</span> <span class='hs-varid'>n</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>v</span> <span class='hs-keyword'>of</span>
<a name="line-104"></a> <span class='hs-conid'>Version</span> <span class='hs-conid'>[]</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>disp</span> <span class='hs-varid'>n</span> <span class='hs-comment'>-- if no version, don't show version.</span>
<a name="line-105"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>disp</span> <span class='hs-varid'>n</span> <span class='hs-varop'><></span> <span class='hs-conid'>Disp</span><span class='hs-varop'>.</span><span class='hs-varid'>char</span> <span class='hs-chr'>'-'</span> <span class='hs-varop'><></span> <span class='hs-varid'>disp</span> <span class='hs-varid'>v</span>
<a name="line-106"></a>
<a name="line-107"></a> <span class='hs-varid'>parse</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-108"></a> <span class='hs-varid'>n</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>parse</span>
<a name="line-109"></a> <span class='hs-varid'>v</span> <span class='hs-keyglyph'><-</span> <span class='hs-layout'>(</span><span class='hs-conid'>Parse</span><span class='hs-varop'>.</span><span class='hs-varid'>char</span> <span class='hs-chr'>'-'</span> <span class='hs-varop'>>></span> <span class='hs-varid'>parse</span><span class='hs-layout'>)</span> <span class='hs-varop'><++</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>Version</span> <span class='hs-conid'>[]</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span>
<a name="line-110"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>PackageIdentifier</span> <span class='hs-varid'>n</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span>
<a name="line-111"></a>
<a name="line-112"></a><span class='hs-comment'>-- ------------------------------------------------------------</span>
<a name="line-113"></a><span class='hs-comment'>-- * Installed Package Ids</span>
<a name="line-114"></a><span class='hs-comment'>-- ------------------------------------------------------------</span>
<a name="line-115"></a>
<a name="line-116"></a><a name="InstalledPackageId"></a><span class='hs-comment'>-- | An InstalledPackageId uniquely identifies an instance of an installed package.</span>
<a name="line-117"></a><a name="InstalledPackageId"></a><span class='hs-comment'>-- There can be at most one package with a given 'InstalledPackageId'</span>
<a name="line-118"></a><a name="InstalledPackageId"></a><span class='hs-comment'>-- in a package database, or overlay of databases.</span>
<a name="line-119"></a><a name="InstalledPackageId"></a><span class='hs-comment'>--</span>
<a name="line-120"></a><a name="InstalledPackageId"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>InstalledPackageId</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>InstalledPackageId</span> <span class='hs-conid'>String</span>
<a name="line-121"></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'>Eq</span><span class='hs-layout'>,</span><span class='hs-conid'>Ord</span><span class='hs-layout'>)</span>
<a name="line-122"></a>
<a name="line-123"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Text</span> <span class='hs-conid'>InstalledPackageId</span> <span class='hs-keyword'>where</span>
<a name="line-124"></a> <span class='hs-varid'>disp</span> <span class='hs-layout'>(</span><span class='hs-conid'>InstalledPackageId</span> <span class='hs-varid'>str</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>text</span> <span class='hs-varid'>str</span>
<a name="line-125"></a>
<a name="line-126"></a> <span class='hs-varid'>parse</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>InstalledPackageId</span> <span class='hs-varop'>`fmap`</span> <span class='hs-conid'>Parse</span><span class='hs-varop'>.</span><span class='hs-varid'>munch1</span> <span class='hs-varid'>abi_char</span>
<a name="line-127"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>abi_char</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Char</span><span class='hs-varop'>.</span><span class='hs-varid'>isAlphaNum</span> <span class='hs-varid'>c</span> <span class='hs-varop'>||</span> <span class='hs-varid'>c</span> <span class='hs-varop'>`elem`</span> <span class='hs-str'>":-_."</span>
<a name="line-128"></a>
<a name="line-129"></a><span class='hs-comment'>-- ------------------------------------------------------------</span>
<a name="line-130"></a><span class='hs-comment'>-- * Package source dependencies</span>
<a name="line-131"></a><span class='hs-comment'>-- ------------------------------------------------------------</span>
<a name="line-132"></a>
<a name="line-133"></a><a name="Dependency"></a><span class='hs-comment'>-- | Describes a dependency on a source package (API)</span>
<a name="line-134"></a><a name="Dependency"></a><span class='hs-comment'>--</span>
<a name="line-135"></a><a name="Dependency"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Dependency</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Dependency</span> <span class='hs-conid'>PackageName</span> <span class='hs-conid'>VersionRange</span>
<a name="line-136"></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'>Eq</span><span class='hs-layout'>)</span>
<a name="line-137"></a>
<a name="line-138"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Text</span> <span class='hs-conid'>Dependency</span> <span class='hs-keyword'>where</span>
<a name="line-139"></a> <span class='hs-varid'>disp</span> <span class='hs-layout'>(</span><span class='hs-conid'>Dependency</span> <span class='hs-varid'>name</span> <span class='hs-varid'>ver</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-140"></a> <span class='hs-varid'>disp</span> <span class='hs-varid'>name</span> <span class='hs-varop'><+></span> <span class='hs-varid'>disp</span> <span class='hs-varid'>ver</span>
<a name="line-141"></a>
<a name="line-142"></a> <span class='hs-varid'>parse</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>name</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>parse</span>
<a name="line-143"></a> <span class='hs-conid'>Parse</span><span class='hs-varop'>.</span><span class='hs-varid'>skipSpaces</span>
<a name="line-144"></a> <span class='hs-varid'>ver</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>parse</span> <span class='hs-varop'><++</span> <span class='hs-varid'>return</span> <span class='hs-varid'>anyVersion</span>
<a name="line-145"></a> <span class='hs-conid'>Parse</span><span class='hs-varop'>.</span><span class='hs-varid'>skipSpaces</span>
<a name="line-146"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>Dependency</span> <span class='hs-varid'>name</span> <span class='hs-varid'>ver</span><span class='hs-layout'>)</span>
<a name="line-147"></a>
<a name="line-148"></a><a name="thisPackageVersion"></a><span class='hs-definition'>thisPackageVersion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>PackageIdentifier</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Dependency</span>
<a name="line-149"></a><span class='hs-definition'>thisPackageVersion</span> <span class='hs-layout'>(</span><span class='hs-conid'>PackageIdentifier</span> <span class='hs-varid'>n</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-150"></a> <span class='hs-conid'>Dependency</span> <span class='hs-varid'>n</span> <span class='hs-layout'>(</span><span class='hs-varid'>thisVersion</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span>
<a name="line-151"></a>
<a name="line-152"></a><a name="notThisPackageVersion"></a><span class='hs-definition'>notThisPackageVersion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>PackageIdentifier</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Dependency</span>
<a name="line-153"></a><span class='hs-definition'>notThisPackageVersion</span> <span class='hs-layout'>(</span><span class='hs-conid'>PackageIdentifier</span> <span class='hs-varid'>n</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-154"></a> <span class='hs-conid'>Dependency</span> <span class='hs-varid'>n</span> <span class='hs-layout'>(</span><span class='hs-varid'>notThisVersion</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span>
<a name="line-155"></a>
<a name="line-156"></a><a name="simplifyDependency"></a><span class='hs-comment'>-- | Simplify the 'VersionRange' expression in a 'Dependency'.</span>
<a name="line-157"></a><span class='hs-comment'>-- See 'simplifyVersionRange'.</span>
<a name="line-158"></a><span class='hs-comment'>--</span>
<a name="line-159"></a><span class='hs-definition'>simplifyDependency</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Dependency</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Dependency</span>
<a name="line-160"></a><span class='hs-definition'>simplifyDependency</span> <span class='hs-layout'>(</span><span class='hs-conid'>Dependency</span> <span class='hs-varid'>name</span> <span class='hs-varid'>range</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-161"></a> <span class='hs-conid'>Dependency</span> <span class='hs-varid'>name</span> <span class='hs-layout'>(</span><span class='hs-varid'>simplifyVersionRange</span> <span class='hs-varid'>range</span><span class='hs-layout'>)</span>
<a name="line-162"></a>
<a name="line-163"></a><span class='hs-comment'>-- | Class of things that have a 'PackageIdentifier'</span>
<a name="line-164"></a><span class='hs-comment'>--</span>
<a name="line-165"></a><span class='hs-comment'>-- Types in this class are all notions of a package. This allows us to have</span>
<a name="line-166"></a><span class='hs-comment'>-- different types for the different phases that packages go though, from</span>
<a name="line-167"></a><span class='hs-comment'>-- simple name\/id, package description, configured or installed packages.</span>
<a name="line-168"></a><span class='hs-comment'>--</span>
<a name="line-169"></a><span class='hs-comment'>-- Not all kinds of packages can be uniquely identified by a</span>
<a name="line-170"></a><span class='hs-comment'>-- 'PackageIdentifier'. In particular, installed packages cannot, there may be</span>
<a name="line-171"></a><span class='hs-comment'>-- many installed instances of the same source package.</span>
<a name="line-172"></a><span class='hs-comment'>--</span>
<a name="line-173"></a><span class='hs-keyword'>class</span> <span class='hs-conid'>Package</span> <span class='hs-varid'>pkg</span> <span class='hs-keyword'>where</span>
<a name="line-174"></a> <span class='hs-varid'>packageId</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>pkg</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PackageIdentifier</span>
<a name="line-175"></a>
<a name="line-176"></a><a name="packageName"></a><span class='hs-definition'>packageName</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Package</span> <span class='hs-varid'>pkg</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>pkg</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PackageName</span>
<a name="line-177"></a><span class='hs-definition'>packageName</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pkgName</span> <span class='hs-varop'>.</span> <span class='hs-varid'>packageId</span>
<a name="line-178"></a>
<a name="line-179"></a><a name="packageVersion"></a><span class='hs-definition'>packageVersion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Package</span> <span class='hs-varid'>pkg</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>pkg</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Version</span>
<a name="line-180"></a><span class='hs-definition'>packageVersion</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pkgVersion</span> <span class='hs-varop'>.</span> <span class='hs-varid'>packageId</span>
<a name="line-181"></a>
<a name="line-182"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Package</span> <span class='hs-conid'>PackageIdentifier</span> <span class='hs-keyword'>where</span>
<a name="line-183"></a> <span class='hs-varid'>packageId</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>id</span>
<a name="line-184"></a>
<a name="line-185"></a><a name="PackageFixedDeps"></a><span class='hs-comment'>-- | Subclass of packages that have specific versioned dependencies.</span>
<a name="line-186"></a><a name="PackageFixedDeps"></a><span class='hs-comment'>--</span>
<a name="line-187"></a><a name="PackageFixedDeps"></a><span class='hs-comment'>-- So for example a not-yet-configured package has dependencies on version</span>
<a name="line-188"></a><a name="PackageFixedDeps"></a><span class='hs-comment'>-- ranges, not specific versions. A configured or an already installed package</span>
<a name="line-189"></a><a name="PackageFixedDeps"></a><span class='hs-comment'>-- depends on exact versions. Some operations or data structures (like</span>
<a name="line-190"></a><a name="PackageFixedDeps"></a><span class='hs-comment'>-- dependency graphs) only make sense on this subclass of package types.</span>
<a name="line-191"></a><a name="PackageFixedDeps"></a><span class='hs-comment'>--</span>
<a name="line-192"></a><a name="PackageFixedDeps"></a><span class='hs-keyword'>class</span> <span class='hs-conid'>Package</span> <span class='hs-varid'>pkg</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>PackageFixedDeps</span> <span class='hs-varid'>pkg</span> <span class='hs-keyword'>where</span>
<a name="line-193"></a> <span class='hs-varid'>depends</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>pkg</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>PackageIdentifier</span><span class='hs-keyglyph'>]</span>
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