[96880] trunk/dports/devel/hs-platform-ghc/Portfile

[cal at macports.org]

Revision: 96880
          https://trac.macports.org/changeset/96880
Author:   cal at macports.org
Date:     2012-08-20 14:32:17 -0700 (Mon, 20 Aug 2012)
Log Message:
-----------
hs-platform-ghc: add upgrade path for haskell-platform users

Modified Paths:
--------------
    trunk/dports/devel/hs-platform-ghc/Portfile

Modified: trunk/dports/devel/hs-platform-ghc/Portfile
===================================================================
--- trunk/dports/devel/hs-platform-ghc/Portfile	2012-08-20 21:21:48 UTC (rev 96879)
+++ trunk/dports/devel/hs-platform-ghc/Portfile	2012-08-20 21:32:17 UTC (rev 96880)
@@ -559,5 +559,25 @@
 	}
 }
 
+pre-activate {
+    # Previously, the ghc port was used to specify the dependency of
+    # haskell-platform. To provide an upgrade path to this port providing
+    # ghc (which conflicts with the ghc port), we need to deactivate the
+    # ghc port.
+
+    # Taken from the isl port, added 2012-08-20
+    if {![catch {set ghc_installed [lindex [registry_active ghc] 0]}]} {
+        # ghc is installed and active
+        set ghc_version [lindex ${ghc_installed} 1]
+        set ghc_epoch [lindex ${ghc_installed} 5]
+
+        if {${ghc_epoch} == 0 && [vercmp ${ghc_version} 7.4.2] < 0} {
+            # the ghc port was probably installed as dependency of
+            # haskell-platform, deactivate it
+            registry_deactivate_composite ghc "" [list ports_nodepscheck 1]
+        }
+    }
+}
+
 livecheck.type	none
 
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