THRIFT-4676: Fix intermittent CL build failures
diff --git a/.gitignore b/.gitignore
index 0e7eedc..b7f7b45 100644
--- a/.gitignore
+++ b/.gitignore
@@ -339,8 +339,17 @@
 /test/rs/target/
 /test/rs/*.iml
 /test/rs/**/*.iml
+/lib/cl/backport-update.zip
+/lib/cl/lib
+/tutorial/cl/quicklisp.lisp
+/tutorial/cl/externals/
+/tutorial/cl/quicklisp/
 /tutorial/cl/TutorialClient
 /tutorial/cl/TutorialServer
+/tutorial/cl/backport-update.zip
+/tutorial/cl/lib/
+/tutorial/cl/shared-implementation.fasl
+/tutorial/cl/tutorial-implementation.fasl
 /tutorial/cpp/TutorialClient
 /tutorial/cpp/TutorialServer
 /tutorial/c_glib/tutorial_client
diff --git a/tutorial/cl/Makefile.am b/tutorial/cl/Makefile.am
index fb6e83a..2b2013a 100755
--- a/tutorial/cl/Makefile.am
+++ b/tutorial/cl/Makefile.am
@@ -15,19 +15,30 @@
 # KIND, either express or implied. See the License for the
 # specific language governing permissions and limitations
 # under the License.
-#
+
+setup-local-lisp-env: ensure-externals.sh
+	bash ensure-externals.sh
 
 gen-cl: $(top_srcdir)/tutorial/tutorial.thrift
 	$(THRIFT) --gen cl -r $<
 
-TutorialServer: make-tutorial-server.lisp
+ALL_FILE_PREREQS = \
+		   load-locally.lisp \
+		   make-tutorial-server.lisp \
+		   make-tutorial-client.lisp \
+		   shared-implementation.lisp \
+		   thrift-tutorial.asd \
+		   tutorial-implementation.lisp
+
+# NOTE: the server and client cannot be built in parallel
+# because on loading the make-tutorial-* scripts SBCL will
+# attempt to compile their dependencies. Unfortunately,
+# because their dependencies are shared, parallel jobs can
+# end up overwriting or corrupting the compiled files
+all-local: gen-cl setup-local-lisp-env $(ALL_FILE_PREREQS)
 	$(SBCL) --script make-tutorial-server.lisp
-
-TutorialClient: make-tutorial-client.lisp
 	$(SBCL) --script make-tutorial-client.lisp
 
-all-local: gen-cl TutorialClient TutorialServer
-
 tutorialserver: all
 	./TutorialServer
 
@@ -35,9 +46,16 @@
 	./TutorialClient
 
 clean-local:
-	$(RM) -r gen-*
-	$(RM) TutorialServer
-	$(RM) TutorialClient
+	-$(RM) -r gen-*
+	-$(RM) -r externals
+	-$(RM) -r quicklisp
+	-$(RM) -r lib
+	-$(RM) quicklisp.lisp
+	-$(RM) backport-update.zip
+	-$(RM) shared-implementation.fasl
+	-$(RM) tutorial-implementation.fasl
+	-$(RM) TutorialServer
+	-$(RM) TutorialClient
 
 EXTRA_DIST = \
 	tutorial-implementation.lisp \
diff --git a/tutorial/cl/ensure-externals.sh b/tutorial/cl/ensure-externals.sh
new file mode 120000
index 0000000..5ae8c56
--- /dev/null
+++ b/tutorial/cl/ensure-externals.sh
@@ -0,0 +1 @@
+../../lib/cl/ensure-externals.sh
\ No newline at end of file
diff --git a/tutorial/cl/load-locally.lisp b/tutorial/cl/load-locally.lisp
new file mode 100644
index 0000000..b52a0a2
--- /dev/null
+++ b/tutorial/cl/load-locally.lisp
@@ -0,0 +1,22 @@
+(in-package #:cl-user)
+
+;;;; Licensed under the Apache License, Version 2.0 (the "License");
+;;;; you may not use this file except in compliance with the License.
+;;;; You may obtain a copy of the License at
+;;;;
+;;;;     http://www.apache.org/licenses/LICENSE-2.0
+;;;;
+;;;; Unless required by applicable law or agreed to in writing, software
+;;;; distributed under the License is distributed on an "AS IS" BASIS,
+;;;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+;;;; See the License for the specific language governing permissions and
+;;;; limitations under the License.
+
+;;;; Just a script for loading the library itself, using bundled dependencies.
+;;;; This is an identical copy of the file in lib/cl.
+
+(require "asdf")
+
+(load (merge-pathnames "externals/bundle.lisp" *load-truename*))
+(asdf:load-asd (merge-pathnames "lib/de.setf.thrift-backport-update/thrift.asd" *load-truename*))
+(asdf:load-system :thrift)
diff --git a/tutorial/cl/make-tutorial-client.lisp b/tutorial/cl/make-tutorial-client.lisp
index 59450a2..3a6d861 100644
--- a/tutorial/cl/make-tutorial-client.lisp
+++ b/tutorial/cl/make-tutorial-client.lisp
@@ -13,7 +13,7 @@
 ;;;; limitations under the License.
 
 (require "asdf")
-(load (merge-pathnames "../../lib/cl/load-locally.lisp" *load-truename*))
+(load (merge-pathnames "load-locally.lisp" *load-truename*))
 (asdf:load-system :net.didierverna.clon)
 (asdf:load-asd (merge-pathnames "gen-cl/shared/thrift-gen-shared.asd" *load-truename*))
 (asdf:load-asd (merge-pathnames "gen-cl/tutorial/thrift-gen-tutorial.asd" *load-truename*))
diff --git a/tutorial/cl/make-tutorial-server.lisp b/tutorial/cl/make-tutorial-server.lisp
index 5621ff3..4cf1a90 100644
--- a/tutorial/cl/make-tutorial-server.lisp
+++ b/tutorial/cl/make-tutorial-server.lisp
@@ -13,7 +13,7 @@
 ;;;; limitations under the License.
 
 (require "asdf")
-(load (merge-pathnames "../../lib/cl/load-locally.lisp" *load-truename*))
+(load (merge-pathnames "load-locally.lisp" *load-truename*))
 (asdf:load-system :net.didierverna.clon)
 (asdf:load-asd (merge-pathnames "gen-cl/shared/thrift-gen-shared.asd" *load-truename*))
 (asdf:load-asd (merge-pathnames "gen-cl/tutorial/thrift-gen-tutorial.asd" *load-truename*))