[gnome-todo] build: Enable out-of-tree builds

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 23c8c1531ad17560128872b0652954b8397fbf90
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Tue Jul 21 11:10:21 2015 +0100

    build: Enable out-of-tree builds
    
    A couple simple changes that allow running autogen.sh from a separate
    build directory.

 autogen.sh |   14 ++++++++++----
 1 files changed, 10 insertions(+), 4 deletions(-)
---
diff --git a/autogen.sh b/autogen.sh
index 363eaf2..f6bdaba 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -1,14 +1,18 @@
 #!/bin/sh
 
-srcdir=`dirname $0`
-test -z "$srcdir" && srcdir=.
+test -n "$srcdir" || srcdir=`dirname "$0"`
+test -n "$srcdir" || srcdir=.
 
-(test -f "$srcdir/configure.ac") || {
+olddir=`pwd`
+
+cd $srcdir
+
+(test -f configure.ac) || {
         echo "*** ERROR: Directory '$srcdir' does not look like the top-level directory of the project ***"
         exit 1
 }
 
-PKG_NAME=`autoconf --trace 'AC_INIT:$1' "$srcdir/configure.ac"`
+PKG_NAME=`autoconf --trace 'AC_INIT:$1' configure.ac`
 
 if [ "$#" = 0 -a "x$NOCONFIGURE" = "x" ]; then
         echo "*** WARNING: I am going to run \`configure' with no arguments." >&2
@@ -23,6 +27,8 @@ glib-gettextize --force --copy || exit $?
 intltoolize --force --copy --automake || exit $?
 autoreconf --verbose --force --install -Wno-portability || exit $?
 
+cd $olddir
+
 if [ "x$NOCONFIGURE" = x ]; then
         $srcdir/configure "$@" || exit $?
 else