From 2df3d891926b785d1abd590eb8bc233913fed992 Mon Sep 17 00:00:00 2001
From: Richard Maw <richard.maw@codethink.co.uk>
Date: Fri, 26 Oct 2012 14:04:48 +0000
Subject: Fix up makefile to allow DESTDIR

PREFIX is mostly substitutable, except in the case of symlinks.
---
 bzip2.morph             |  4 ++--
 bzip2.morph-makefix.sed | 10 ++++++++++
 2 files changed, 12 insertions(+), 2 deletions(-)
 create mode 100644 bzip2.morph-makefix.sed

diff --git a/bzip2.morph b/bzip2.morph
index bb321f1..7dd89e6 100644
--- a/bzip2.morph
+++ b/bzip2.morph
@@ -2,14 +2,14 @@
     "name": "bzip2",
     "kind": "chunk",
     "configure-commands": [
-        "sed -i -e 's|$(PREFIX)/man|$(PREFIX)/share/man|g' Makefile"
+        "sed -i -rf bzip2.morph-makefix.sed Makefile"
     ],
     "build-commands": [
         "make -f Makefile-libbz2_so",
         "make"
     ],
     "install-commands": [
-        "make PREFIX=\"$DESTDIR$PREFIX\" install",
+        "make DESTDIR=\"$DESTDIR\" PREFIX=\"$PREFIX\" install",
         "install libbz2.so* \"$DESTDIR$PREFIX/lib\""
     ]
 }
diff --git a/bzip2.morph-makefix.sed b/bzip2.morph-makefix.sed
new file mode 100644
index 0000000..9589790
--- /dev/null
+++ b/bzip2.morph-makefix.sed
@@ -0,0 +1,10 @@
+#!/usr/bin/sed
+# Match the install section of the makefile
+/^install:/,/^$/{
+    # link commands only substitute the final PREFIX
+    /^\s*ln.*$/s/\$\(PREFIX\)(\S+)$/$(DESTDIR)$(PREFIX)\1/;
+    # non-inks substitute $(PREFIX) for $(DESTDIR)$(PREFIX)
+    /^\s*ln.*$/!s/\$\(PREFIX\)/$(DESTDIR)$(PREFIX)/g;
+    # fix manpage paths
+    s|\$\(PREFIX\)/man|$(PREFIX)/share/man|g
+}
-- 
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