[RFC 02/15] dpkg-gbp: Use separate export-orig command

[Anton Mikanovich <amikan@ilbers.de>]

We don't actually build the package with gbp, but only prepare it for
the building with external dpkg-buildpackage command. In case there is
no need in real build we can perform only export-orig command which
will produce upstream tarball to pass for later building.
This allows to use any build tool for later processing.

Signed-off-by: Anton Mikanovich <amikan@ilbers.de>
---
 meta/classes/dpkg-gbp.bbclass | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/meta/classes/dpkg-gbp.bbclass b/meta/classes/dpkg-gbp.bbclass
index 20d2d4c..2711e6c 100644
--- a/meta/classes/dpkg-gbp.bbclass
+++ b/meta/classes/dpkg-gbp.bbclass
@@ -10,7 +10,7 @@ S = "${WORKDIR}/git"
 PATCHTOOL ?= "git"
 
 GBP_DEPENDS ?= "git-buildpackage pristine-tar"
-GBP_EXTRA_OPTIONS ?= "--git-pristine-tar"
+GBP_EXTRA_OPTIONS ?= "--pristine-tar"
 
 builddeps_install_append() {
     deb_dl_dir_import "${BUILDCHROOT_DIR}" "${distro}"
@@ -24,5 +24,6 @@ builddeps_install_append() {
 }
 
 dpkg_runbuild_prepend() {
-    export GBP_PREFIX="gbp buildpackage --git-ignore-new ${GBP_EXTRA_OPTIONS} --git-builder="
+    sudo -E chroot --userspec=$( id -u ):$( id -g ) ${BUILDCHROOT_DIR} \
+        sh -c "cd ${PP}/${PPS} && gbp export-orig ${GBP_EXTRA_OPTIONS}"
 }
-- 
2.25.1