improvements to generate-release-artifacts.sh

- better filename for the generated archive
- clean before build, always feels like a good idea
- always be sure to include the example site files, instead of doing it
  manually, post-run as i was doing before (and forgot to do for one
  of the releases ... oops ...)

generate-release-artifacts.sh

@@ -1,9 +1,22 @@
 #!/bin/bash
 cd "$(dirname "$0")"
 
+package_version=$(cargo pkgid | cut -d# -f2 | cut -d: -f2)
+current_target=$(rustc -vV | sed -n 's|host: ||p')
+
+package_filename="pbe-v${package_version}-${current_target}.tar.gz"
+
+rm -f ./artifacts/bin/pbe
+rm -f ./artifacts/bin/syntax_to_css
+
+cargo clean
 cargo install --path . --root ./artifacts/
 cargo install --path ./syntax_to_css/ --root ./artifacts/
 
-cd ./artifacts/bin
-tar -cvf ../../release.tar.gz ./pbe ./syntax_to_css
+tar -cvf $package_filename \
+    example-site \
+    -C ./artifacts/bin \
+    pbe \
+    syntax_to_css
 
+echo "Packaged release as ${package_filename}"