Build samples in Docker

.gitignore

@@ -17,4 +17,5 @@ apidox
 .docker*.build
 .docker*.Packages
 Package.pins
+Package.resolved
 

GNUmakefile

@@ -131,5 +131,22 @@ docker-build-4:
 		swift:4.0.2 \
 		bash -c "cd /src && swift build"
 
+docker-build-3-samples:
+	mkdir -p .docker3.build .docker3.Packages
+	docker run --rm \
+		-v $(PWD):/src \
+		-v $(PWD)/.docker3.build:/src/.build	\
+		-v $(PWD)/.docker3.Packages:/src/Packages \
+		swift:3.1.1 \
+		bash -c "cd /src && swift build && git tag --force 0.3.33 && cd Samples && make distclean && make && git tag -d 0.3.33"
+
+docker-build-4-samples:
+	mkdir -p .docker4.build
+	docker run --rm \
+		-v $(PWD):/src \
+		-v $(PWD)/.docker4.build:/src/.build	\
+		swift:4.0.2 \
+		bash -c "cd /src && swift build && git tag --force 0.3.33 && cd Samples && make distclean && make && git tag -d 0.3.33"
+
 docker-clean:
 	rm -rf .docker3.* .docker4.*

Samples/GNUmakefile

@@ -49,4 +49,3 @@ clean :
 
 distclean : clean
 	rm -rf */Packages */Package.pins */Package.resolved
-