monthly release (Azure#19728)

* monthly release

* fix

* exit 0

Author: Alancere

eng/scripts/mgmt-auto-release.sh

@@ -1,6 +1,17 @@
 #!/bin/bash
 set -ex
 
+today=`date "+%Y%m%d"`
+firstDay=`date -d "${today}" +%Y%m01`
+week=`date -d "$firstDay" +%w`
+secondSaturday=$((firstDay+(12 - week) % 7 + 8))
+
+if [ $today -gt $secondSaturday ]
+then
+ echo "The PR generation time of the current month is: [$firstDay-$secondSaturday]"
+ exit 0
+fi
+
 export PATH=$PATH:$HOME/go/bin
 git config --global user.email "ReleaseHelper"
 git config --global user.name "ReleaseHelper"