start-mailserver.sh split (#1820)

* splitting start-mailserver.sh

* refactoring part 2

* refactored setup-stack.sh
* stzarted adjusting target/bin/*.sh to use new usage format

* corrected lowercase-uppercase test error

* better handling of .bashrc variable export

* linting tests and fix for default assignements

* last stylistic changes and rebase

target/scripts/startup/misc-stack.sh

@@ -0,0 +1,64 @@
+#! /bin/bash
+
+function start_misc
+{
+  _notify 'inf' 'Starting miscellaneous tasks'
+  for FUNC in "${FUNCS_MISC[@]}"
+  do
+    ${FUNC} || _defunc
+  done
+}
+
+# consolidate all states into a single directory
+# (/var/mail-state) to allow persistence using docker volumes
+function _misc_save_states
+{
+  local STATEDIR FILE FILES
+
+  STATEDIR='/var/mail-state'
+
+  if [[ ${ONE_DIR} -eq 1 ]] && [[ -d ${STATEDIR} ]]
+  then
+    _notify 'inf' "Consolidating all state onto ${STATEDIR}"
+
+    FILES=(
+      spool/postfix
+      lib/postfix
+      lib/amavis
+      lib/clamav
+      lib/spamassassin
+      lib/fail2ban
+      lib/postgrey
+      lib/dovecot
+    )
+
+    for FILE in "${FILES[@]}"
+    do
+      DEST="${STATEDIR}/${FILE//\//-}"
+      FILE="/var/${FILE}"
+
+      if [[ -d ${DEST} ]]
+      then
+        _notify 'inf' "Destination ${DEST} exists, linking ${FILE} to it"
+        rm -rf "${FILE}"
+        ln -s "${DEST}" "${FILE}"
+      elif [[ -d ${FILE} ]]
+      then
+        _notify 'inf' "Moving contents of ${FILE} to ${DEST}:" "$(ls "${FILE}")"
+        mv "${FILE}" "${DEST}"
+        ln -s "${DEST}" "${FILE}"
+      else
+        _notify 'inf' "Linking ${FILE} to ${DEST}"
+        mkdir -p "${DEST}"
+        ln -s "${DEST}" "${FILE}"
+      fi
+    done
+
+    _notify 'inf' 'Fixing /var/mail-state/* permissions'
+    chown -R clamav /var/mail-state/lib-clamav
+    chown -R postfix /var/mail-state/lib-postfix
+    chown -R postgrey /var/mail-state/lib-postgrey
+    chown -R debian-spamd /var/mail-state/lib-spamassassin
+    chown -R postfix /var/mail-state/spool-postfix
+  fi
+}