[PATCH 2/2] devtools: configure source repo to use as ABI reference

[Ferruh Yigit <ferruh.yigit@amd.com>]

By default 'test-meson-builds.sh' script clones the repository which the
script is in, and selects a configured branch ('DPDK_ABI_REF_VERSION')
as a reference for ABI check.

This patch enables selecting different repository to close for reference
using 'DPDK_ABI_REF_SRC' environment variable.

It is possible to put these variables to 'devel.config' config file, or
provide via command line, like:
`
 DPDK_ABI_REF_SRC=~/dpdk-stable/   \
 DPDK_ABI_REF_VERSION=v22.11.1     \
 DPDK_ABI_REF_DIR=/tmp/dpdk-abiref \
 ./devtools/test-meson-builds.sh
`

When 'DPDK_ABI_REF_SRC' is not defined, script behaves as it did
previously.

Other alternative to using 'DPDK_ABI_REF_SRC' variable is adding that
other repo as a new 'remote' to the exiting git repository.

Signed-off-by: Ferruh Yigit <ferruh.yigit@amd.com>
---
 devtools/test-meson-builds.sh | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/devtools/test-meson-builds.sh b/devtools/test-meson-builds.sh
index bbe90e2bde2e..8a0ed92fcf0a 100755
--- a/devtools/test-meson-builds.sh
+++ b/devtools/test-meson-builds.sh
@@ -18,6 +18,7 @@ srcdir=$(dirname $(readlink -f $0))/..
 #
 # - DPDK_MESON_OPTIONS
 #
+# - DPDK_ABI_REF_SRC
 # - DPDK_ABI_REF_DIR
 # - DPDK_ABI_REF_VERSION
 #
@@ -185,12 +186,13 @@ build () # <directory> <target cc | cross file> <ABI check> [meson options]
 	if [ -n "$DPDK_ABI_REF_VERSION" -a "$abicheck" = ABI ] ; then
 		abirefdir=${DPDK_ABI_REF_DIR:-reference}/$DPDK_ABI_REF_VERSION
 		if [ ! -d $abirefdir/$targetdir ]; then
+			abirefsrc=${DPDK_ABI_REF_SRC:-$srcdir}
 			# clone current sources
 			if [ ! -d $abirefdir/src ]; then
 				git clone --local --no-hardlinks \
 					--single-branch \
 					-b $DPDK_ABI_REF_VERSION \
-					$srcdir $abirefdir/src
+					$abirefsrc $abirefdir/src
 			fi
 
 			rm -rf $abirefdir/build
-- 
2.25.1