Eliminate RABBITMQ_PLUGINS_EXPAND_DIRbug23145

There were a number of issues with RABBITMQ_PLUGINS_EXPAND_DIR:

- It was undocumented in the context of the generic unix package, and
  if unwisely set could do an effective "rm -rf" in an unintended
  location.

- It did not take account of the possibility that multiple nodes could
  be starting at once, and so doing plugins activation
  simultanteously.

Instead, use RABBITMQ_MNESIA_DIR/plugins-scratch.  This avoids the
need to extend the generic unix package documentation, the location is
node-specific, and the distinctive plugins-scratch subdirectory
reduces the risk of unintended file deletions.
(transplanted from 064b8797493bb290156fb72a54f9e9276df0faed)

3 files changed, 12 insertions, 20 deletions

diff --git a/scripts/rabbitmq-server b/scripts/rabbitmq-server
index d52dc774..9310752f 100755
--- a/scripts/rabbitmq-server
+++ b/scripts/rabbitmq-server
@@ -39,7 +39,6 @@ CLUSTER_CONFIG_FILE=/etc/rabbitmq/rabbitmq_cluster.config
 CONFIG_FILE=/etc/rabbitmq/rabbitmq
 LOG_BASE=/var/log/rabbitmq
 MNESIA_BASE=/var/lib/rabbitmq/mnesia
-PLUGINS_EXPAND_DIR=/var/lib/rabbitmq/plugins-scratch
 SERVER_START_ARGS=
 
 . `dirname $0`/rabbitmq-env
@@ -70,7 +69,6 @@ fi
 [ "x" = "x$RABBITMQ_MNESIA_DIR" ] && RABBITMQ_MNESIA_DIR=${RABBITMQ_MNESIA_BASE}/${RABBITMQ_NODENAME}
 
 [ "x" = "x$RABBITMQ_PLUGINS_DIR" ] && RABBITMQ_PLUGINS_DIR="${RABBITMQ_HOME}/plugins"
-[ "x" = "x$RABBITMQ_PLUGINS_EXPAND_DIR" ] && RABBITMQ_PLUGINS_EXPAND_DIR="${PLUGINS_EXPAND_DIR}"
 
 ## Log rotation
 [ "x" = "x$RABBITMQ_LOGS" ] && RABBITMQ_LOGS=${LOGS}
@@ -91,14 +89,14 @@ if [ "x" = "x$RABBITMQ_NODE_ONLY" ]; then
     if erl \
 	-pa "$RABBITMQ_EBIN_ROOT" \
 	-rabbit plugins_dir "\"$RABBITMQ_PLUGINS_DIR\"" \
-	-rabbit plugins_expand_dir "\"$RABBITMQ_PLUGINS_EXPAND_DIR\"" \
+	-rabbit plugins_expand_dir "\"${RABBITMQ_MNESIA_DIR}/plugins-scratch\"" \
 	-rabbit rabbit_ebin "\"$RABBITMQ_EBIN_ROOT\"" \
 	-noinput \
 	-hidden \
 	-s rabbit_plugin_activator \
 	-extra "$@"
     then
-	RABBITMQ_BOOT_FILE="${RABBITMQ_PLUGINS_EXPAND_DIR}/rabbit"
+	RABBITMQ_BOOT_FILE="${RABBITMQ_MNESIA_DIR}/plugins-scratch/rabbit"
 	RABBITMQ_EBIN_PATH=""
     else
 	exit 1
diff --git a/scripts/rabbitmq-server.bat b/scripts/rabbitmq-server.bat
index b1a91f47..5bcbc6ba 100644
--- a/scripts/rabbitmq-server.bat
+++ b/scripts/rabbitmq-server.bat
@@ -110,24 +110,21 @@ if "!RABBITMQ_MNESIA_DIR!"=="" (
 set RABBITMQ_PLUGINS_DIR=!TDP0!..\plugins

 set RABBITMQ_EBIN_ROOT=!TDP0!..\ebin

 

-if "!RABBITMQ_PLUGINS_EXPAND_DIR!"=="" (

-    set RABBITMQ_PLUGINS_EXPAND_DIR=!RABBITMQ_BASE!\plugins-scratch

-)

-

 "!ERLANG_HOME!\bin\erl.exe" ^

 -pa "!RABBITMQ_EBIN_ROOT!" ^

 -noinput -hidden ^

 -s rabbit_plugin_activator ^

 -rabbit plugins_dir \""!RABBITMQ_PLUGINS_DIR:\=/!"\" ^

--rabbit plugins_expand_dir \""!RABBITMQ_PLUGINS_EXPAND_DIR:\=/!"\" ^

+-rabbit plugins_expand_dir \""!RABBITMQ_MNESIA_DIR:\=/!/plugins-scratch"\" ^

 -rabbit rabbit_ebin  \""!RABBITMQ_EBIN_ROOT:\=/!"\" ^

 -extra !STAR!

 

-if not exist "!RABBITMQ_PLUGINS_EXPAND_DIR!\rabbit.boot" (

-    echo Custom Boot File "!RABBITMQ_PLUGINS_EXPAND_DIR!\rabbit.boot" is missing.

+set RABBITMQ_BOOT_FILE=!RABBITMQ_MNESIA_DIR!\plugins-scratch\rabbit

+if not exist "!RABBITMQ_BOOT_FILE!.boot" (

+    echo Custom Boot File "!RABBITMQ_BOOT_FILE!.boot" is missing.

     exit /B 1

 )

-set RABBITMQ_BOOT_FILE=!RABBITMQ_PLUGINS_EXPAND_DIR!\rabbit

+

 set RABBITMQ_EBIN_PATH=

 

 if "!RABBITMQ_CONFIG_FILE!"=="" (

diff --git a/scripts/rabbitmq-service.bat b/scripts/rabbitmq-service.bat
index 95e5eebf..4b3961d4 100644
--- a/scripts/rabbitmq-service.bat
+++ b/scripts/rabbitmq-service.bat
@@ -180,24 +180,21 @@ if errorlevel 1 (
 set RABBITMQ_PLUGINS_DIR=!TDP0!..\plugins

 set RABBITMQ_EBIN_ROOT=!TDP0!..\ebin

 

-if "!RABBITMQ_PLUGINS_EXPAND_DIR!"=="" (

-    set RABBITMQ_PLUGINS_EXPAND_DIR=!RABBITMQ_BASE!\plugins-scratch

-)

-

 "!ERLANG_HOME!\bin\erl.exe" ^

 -pa "!RABBITMQ_EBIN_ROOT!" ^

 -noinput -hidden ^

 -s rabbit_plugin_activator ^

 -rabbit plugins_dir \""!RABBITMQ_PLUGINS_DIR:\=/!"\" ^

--rabbit plugins_expand_dir \""!RABBITMQ_PLUGINS_EXPAND_DIR:\=/!"\" ^

+-rabbit plugins_expand_dir \""!RABBITMQ_MNESIA_DIR:\=/!/plugins-scratch"\" ^

 -rabbit rabbit_ebin  \""!RABBITMQ_EBIN_ROOT:\=/!"\" ^

 -extra !STAR!

 

-if not exist "!RABBITMQ_PLUGINS_EXPAND_DIR!\rabbit.boot" (

-    echo Custom Boot File "!RABBITMQ_PLUGINS_EXPAND_DIR!\rabbit.boot" is missing.

+set RABBITMQ_BOOT_FILE=!RABBITMQ_MNESIA_DIR!\plugins-scratch\rabbit

+if not exist "!RABBITMQ_BOOT_FILE!.boot" (

+    echo Custom Boot File "!RABBITMQ_BOOT_FILE!.boot" is missing.

     exit /B 1

 )

-set RABBITMQ_BOOT_FILE=!RABBITMQ_PLUGINS_EXPAND_DIR!\rabbit

+

 set RABBITMQ_EBIN_PATH=

 

 if "!RABBITMQ_CONFIG_FILE!"=="" (