[source] scripts/getver.sh: stop relying on the reboot tag

[LEDE Commits]

nbd pushed a commit to source.git, branch master:
https://git.lede-project.org/?p=source.git;a=commitdiff;h=7ed215437c784eb466302a5c01a4ee2fff9eac2d

commit 7ed215437c784eb466302a5c01a4ee2fff9eac2d
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Thu Jul 14 13:30:54 2016 +0200

    scripts/getver.sh: stop relying on the reboot tag
    
    It may not be present when cloning a staging tree or another fork
    
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
---
 scripts/getver.sh | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/scripts/getver.sh b/scripts/getver.sh
index 46eee9a..a65a6af 100755
--- a/scripts/getver.sh
+++ b/scripts/getver.sh
@@ -12,6 +12,7 @@ try_version() {
 }
 
 try_git() {
+	REBOOT=ee53a240ac902dc83209008a2671e7fdcf55957a
 	git rev-parse --git-dir >/dev/null 2>&1 || return 1
 
 	[ -n "$GET_REV" ] || GET_REV="HEAD"
@@ -19,18 +20,18 @@ try_git() {
 	case "$GET_REV" in
 	r*)
 		GET_REV="$(echo $GET_REV | tr -d 'r')"
-		BASE_REV="$(git rev-list reboot..HEAD | wc -l | awk '{print $1}')"
+		BASE_REV="$(git rev-list ${REBOOT}..HEAD | wc -l | awk '{print $1}')"
 		REV="$(git rev-parse HEAD~$((BASE_REV - GET_REV)))"
 		;;
 	*)
 		BRANCH="$(git rev-parse --abbrev-ref HEAD)"
 		ORIGIN="$(git rev-parse --symbolic-full-name ${BRANCH}@{u} 2>/dev/null)"
 		[ -n "$ORIGIN" ] || ORIGIN="$(git rev-parse --symbolic-full-name master@{u} 2>/dev/null)"
-		REV="$(git rev-list reboot..$GET_REV | wc -l | awk '{print $1}')"
+		REV="$(git rev-list ${REBOOT}..$GET_REV | wc -l | awk '{print $1}')"
 
 		if [ -n "$ORIGIN" ]; then
 			UPSTREAM_BASE="$(git merge-base $GET_REV $ORIGIN)"
-			UPSTREAM_REV="$(git rev-list reboot..$UPSTREAM_BASE | wc -l | awk '{print $1}')"
+			UPSTREAM_REV="$(git rev-list ${REBOOT}..$UPSTREAM_BASE | wc -l | awk '{print $1}')"
 		else
 			UPSTREAM_REV=$REV
 		fi