Merge branch 'nopackages' into 'master'

Send an email to admins in the event that there are no new packages

See merge request !14

stream8_snapshots/email_nopackages.tpl

+To: $EMAIL_ADMIN
+From: $EMAIL_FROM
+Reply-To: noreply.$EMAIL_FROM
+Return-Path: $EMAIL_ADMIN
+Subject: CS8 - No new packages today
+
+Dear Linux admins,
+
+Just a quick message to let you know that there were no new upstream CentOS Stream 8 packages today.
+
+Here's the current state of the symlinks:
+
+$STATE
+
+Have a nice day!
+
+---
+Best regards,
+CERN Linux Droid
+(on behalf of the friendly humans of Linux Support)

stream8_snapshots/sendemail.sh

@@ -43,8 +43,35 @@ for ARCH in $CENTOS_ARCHES; do
   done
 done
 
+if [[ $CHANNEL == "daily" ]]; then
+  STATE=""
+  while IFS= read -r LINE; do
+    MODTIME="`echo $LINE | cut -d'.' -f1`"
+    LINK="`echo $LINE | cut -d' ' -f2`"
+    TARGET="`readlink $DESTINATION/$LINK`"
+    STATE="$STATE  `printf '%-20s' "$LINK"` -> $TARGET (modified $MODTIME)\n"
+  done <<< "`find $DESTINATION -maxdepth 1 -type l -name \"${RELEASE}*\" -printf '%T+ %P\n' | sort | tail -n 10`"
+  # grab the last 10 symlinks so we can see the state of the previous point release as well
+
+  FROZEN=`find $DESTINATION -maxdepth 1 -type f -name ".freeze.${RELEASE}*" -print -quit`
+  if [[ -n "$FROZEN" ]]; then
+    STATE="$STATE\n ***************************************************\n"
+    STATE="$STATE ***  .freeze.${RELEASE}* exists, links won't be updated  ***\n"
+    STATE="$STATE ***************************************************\n"
+  fi
+  export STATE="`printf "$STATE"`"
+fi
+
 # There are no diffs to report on, we can stop
-[[ ! -s "$TMPDIR/.longlist" ]] && exit
+if [[ ! -s "$TMPDIR/.longlist" ]]; then
+  if [[ $CHANNEL == "daily" ]]; then
+    # But let's inform the admins (so they don't worry unneccessarily)
+    envsubst < /root/email_nopackages.tpl >> "$TMPDIR/.email"
+    cat "$TMPDIR/.email" | swaks --server $MAILMX --to $EMAIL_TO --data -
+    rm "$TMPDIR/.email"
+  fi
+  exit
+fi
 
 # Update website
 if [[ $CHANNEL == "production" ]] || [[ $CHANNEL == "testing" ]]; then
@@ -67,25 +94,6 @@ export TODAY="$TODAY"
 export SHORTLIST="`echo "$SHORTLIST" | sed 's/\b\s\+\b/, /g'`"
 export WEBSITE
 
-if [[ $CHANNEL == "daily" ]]; then
-  STATE=""
-  while IFS= read -r LINE; do
-    MODTIME="`echo $LINE | cut -d'.' -f1`"
-    LINK="`echo $LINE | cut -d' ' -f2`"
-    TARGET="`readlink $DESTINATION/$LINK`"
-    STATE="$STATE  `printf '%-20s' "$LINK"` -> $TARGET (modified $MODTIME)\n"
-  done <<< "`find $DESTINATION -maxdepth 1 -type l -name \"${RELEASE}*\" -printf '%T+ %P\n' | sort | tail -n 10`"
-  # grab the last 10 symlinks so we can see the state of the previous point release as well
-
-  FROZEN=`find $DESTINATION -maxdepth 1 -type f -name ".freeze.${RELEASE}*" -print -quit`
-  if [[ -n "$FROZEN" ]]; then
-    STATE="$STATE\n ***************************************************\n"
-    STATE="$STATE ***  .freeze.${RELEASE}* exists, links won't be updated  ***\n"
-    STATE="$STATE ***************************************************\n"
-  fi
-  export STATE="`printf "$STATE"`"
-fi
-
 envsubst < $TEMPLATE | sed '/^--PACKAGES--$/Q' > "$TMPDIR/.email"
 for ARCH in $CENTOS_ARCHES; do
   for REPO in $ALL_REPOS; do