Enable build dir outside of the poky directory

You need to first set up the build directory by sourcing the poky build script,
after that builds can be run in that directory so long as bitbake is in $PATH
removing the need to source the init script for each build.

i.e:
$ . poky-init-build-env ~/my-build
$ bitbake some-image
<<later, in a different shell>>
$ cd ~/my-build
$ export PATH=/path/to/bitbake/bin:$PATH
$ bitbake an-image

This patch also removes use of OEROOT in recipes, etc.

Signed-off-by: Joshua Lock <josh@linux.intel.com>

1 files changed, 31 insertions, 18 deletions

diff --git a/scripts/poky-env-internal b/scripts/poky-env-internal
index 54b6ee8964..862ce7aec2 100755
--- a/scripts/poky-env-internal
+++ b/scripts/poky-env-internal
@@ -19,19 +19,30 @@
 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
 
-# Change this to the location of this file.
-# Also update the locations at the top of conf/local.conf
+# scripts/ is a sub-directory of OEROOT, we use readlink to get the full path
+SCRIPTPATH=`readlink -f "$BASH_SOURCE"`
+OEROOT="`dirname $SCRIPTPATH`/../"
 
-OEROOT=`pwd`
 if [ "x$BDIR" = "x" ]; then
-	if [ "x$1" = "x" ]; then
-		BDIR="build"
-	else
-		BDIR="$1"
-	fi
+	  if [ "x$1" = "x" ]; then
+        BDIR="build"
+	  else
+		    BDIR=`readlink -f "$1"`
+	  fi
+fi
+if [[ "$BDIR" = /* ]] ; then
+    BUILDDIR="$BDIR"
+else
+    BUILDDIR="`pwd`/$BDIR"
 fi
-BUILDDIR="$OEROOT/$BDIR/"
 unset BDIR
+
+mkdir -p $BUILDDIR/conf
+if ! (test -w "$BUILDDIR"); then
+    echo >&2 "Error: Cannot write to $BUILDDIR, perhaps try sourcing with a writable path? i.e. . poky-init-build-env ~/my-build"
+    return
+fi
+
 BITBAKEDIR="$OEROOT/bitbake$BBEXTRA/"
 PKGDIR="$OEROOT/meta/"
 BBPATH="$BITBAKEDIR $PKGDIR"
@@ -51,9 +62,8 @@ do
         continue
     fi
     if [ -e $OEROOT/$repo/poky-extra-environment ]; then
-	. $OEROOT/$repo/poky-extra-environment
+	      . $OEROOT/$repo/poky-extra-environment
     fi
-    BBPATH=" $BBPATH $OEROOT/$repo"
 done
 
 BBPATH="$BBPATH $HOME/.oe $HOME/.poky $BUILDDIR"
@@ -78,12 +88,13 @@ BUILD_SYS="$BUILD_ARCH-$BUILD_OS"
 
 PATH="$BITBAKEDIR/bin/:$OEROOT/scripts:$PATH"
 
-cd "$BUILDDIR"
-
 # Remove any symlinks from paths
 BITBAKEDIR=`readlink -f "$BITBAKEDIR"`
 PKGDIR=`readlink -f "$PKGDIR"`
 BUILDDIR=`readlink -f "$BUILDDIR"`
+OEROOT=`readlink -f "$OEROOT"`
+
+cd "$BUILDDIR"
 
 if ! (test -d "$BITBAKEDIR" && test -d "$PKGDIR" && test -d "$BUILDDIR"); then
     echo >&2 "Error: Not all directories exist! Did you run this script in poky directory?"
@@ -91,7 +102,7 @@ if ! (test -d "$BITBAKEDIR" && test -d "$PKGDIR" && test -d "$BUILDDIR"); then
 fi
 
 if [ "x" = "x$POKYLOCALCONF" ]; then
-    POKYLOCALCONF="$BUILDDIR/conf/local.conf.sample"
+    POKYLOCALCONF="$OEROOT/build/conf/local.conf.sample"
 fi
 if ! (test -r "$BUILDDIR/conf/local.conf"); then
     echo "You had no conf/local.conf file. Poky has created this configuration file for you"
@@ -105,17 +116,19 @@ if ! (test -r "$BUILDDIR/conf/local.conf"); then
 fi
 
 if [ "x" = "x$POKYLAYERCONF" ]; then
-    POKYLAYERCONF="$BUILDDIR/conf/bblayers.conf.sample"
+    POKYLAYERCONF="$OEROOT/build/conf/bblayers.conf.sample"
 fi
 if ! (test -r "$BUILDDIR/conf/bblayers.conf"); then
-    cp -f $POKYLAYERCONF $BUILDDIR/conf/bblayers.conf
+    # Put the abosolute path to the layers in bblayers.conf so we can run
+    # bitbake without the init script after the first run
+    sed "s|##POKYBASE##|$OEROOT|g" $POKYLAYERCONF > $BUILDDIR/conf/bblayers.conf
 fi
 
 # Prevent disturbing a new GIT clone in same console
 unset POKYLOCALCONF
 unset POKYLAYERCONF
 
-export BBPATH OEROOT BUILD_SYS BUILDDIR
+export BBPATH BUILD_SYS BUILDDIR
 
 # Kill off the TERMINFO variable, as glibc will grab its contents in its 'make
 # install' if set
@@ -141,4 +154,4 @@ echo "Common targets are poky-image-minimal, poky-image-sato, meta-toolchain or
 echo
 echo "You can also run generated qemu images with a command like 'runqemu qemux86'"
 
-export BB_ENV_EXTRAWHITE="MACHINE DISTRO POKYMODE POKYLIBC OEROOT http_proxy ftp_proxy SSH_AGENT_PID SSH_AUTH_SOCK BB_SRCREV_POLICY SDKMACHINE BB_NUMBER_THREADS"
+export BB_ENV_EXTRAWHITE="MACHINE DISTRO POKYMODE POKYLIBC http_proxy ftp_proxy SSH_AGENT_PID SSH_AUTH_SOCK BB_SRCREV_POLICY SDKMACHINE BB_NUMBER_THREADS"