platforms-ci.sh: add smart release date check

If we are releasing at the start of a month, that almost always because
we're making the previous month's release late.

So if it's the start of a month, use the previous month's date as the
release marker.

I used 15th of the month as the cut-off point. From the 15th onwards, we
assume we're making the release early.

Eg. if it's 14th August 2017, use 17.07
    if it's 15th August 2017, use 17.08

Signed-off-by: Ryan Harkin <ryan.harkin@linaro.org>

1 files changed, 17 insertions, 1 deletions

diff --git a/platforms-ci.sh b/platforms-ci.sh
index 505ffc1..b944c22 100755
--- a/platforms-ci.sh
+++ b/platforms-ci.sh
@@ -27,7 +27,23 @@ unset WORKSPACE
 case "$1" in
 	"release" )
 		JOB_TYPE=release
-		YYMM=`date +%y`.`date +%m`
+
+		Y=`date +%-y`
+		M=`date +%-m`
+		D=`date +%-d`
+		# if the release is being made at the start of the month
+		# we assume we're making the previous month's release late
+		if [ "${D}" -lt "15" ]; then
+			# check if we need to wrap to the previous year
+			if [ "$M" == "1" ]; then
+				M=11
+				((Y--))
+			else
+				((M--))
+			fi
+		fi
+		YYMM=`printf "%02d.%02d" $Y $M`
+		echo Building release $YYMM
 		PINNED="pinned-"
 		;;