kernel-yocto: use cat-file instead of git-show

Parsing the output of git show is error prone, since it changes based on
the type of issue with bad comit IDs. Since the output is no longer used
in the case of a valid ref, we can switch to git-cat-file and  simply
check the return code.

(From OE-Core rev: 228c05013fe691321ec00467d8d0c0bb64dd175c)

Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/meta/classes/kernel-yocto.bbclass b/meta/classes/kernel-yocto.bbclass
index 6c92427704..38c886b21b 100644
--- a/meta/classes/kernel-yocto.bbclass
+++ b/meta/classes/kernel-yocto.bbclass
@@ -321,8 +321,8 @@ do_validate_branches() {
                 fi
         fi
 
-        ref=`git show ${machine_srcrev} 2>&1 | head -n1 || true`
-        if [ "$ref" = "fatal: bad object ${target_meta_head}" ]; then
+        git cat-file -t ${machine_srcrev} > /dev/null
+        if [ if $? -ne 0 ]; then
             echo "ERROR ${machine_srcrev} is not a valid commit ID."
             echo "The kernel source tree may be out of sync"
             exit 1
@@ -358,8 +358,8 @@ do_validate_branches() {
         git show-ref --quiet --verify -- "refs/heads/${KMETA}"
         if [ $? -eq 0 ] && [ "${target_meta_head}" != "AUTOINC" ]; then
                 if [ "$meta_head" != "$target_meta_head" ]; then
-                        ref=`git show ${target_meta_head} 2>&1 | head -n1 || true`
-                        if [ "$ref" = "fatal: bad object ${target_meta_head}" ]; then
+                        git cat-file -t ${target_meta_head} > /dev/null
+                        if [ $? -ne 0 ]; then
                                 echo "ERROR ${target_meta_head} is not a valid commit ID"
                                 echo "The kernel source tree may be out of sync"
                                 exit 1