Fix release script

release

@@ -2,24 +2,29 @@
 
 set -x
 
+readonly BIN=protoc-gen-elm
+
 # Make sure the current commit is tagged, using the following command:
-# git tag -a 0.0.2 -m 'release'
+# git tag -a v0.0.2 -m 'release'
+
+# Remove the leading "v" from the tag, if necessary.
+VERSION=$(git tag --contains | tr -d v)
 
-TAG=$(git tag --contains)
-[[ -z $TAG ]] && exit
+# Exit if a tag does not exist for the current commit.
+[[ -z $VERSION ]] && exit
 
-OUT=elm-protobuf-${TAG}-linux-x86_32
-GOOS=linux GOARCH=386 go build -o ./bin/${OUT}/protoc-gen-elm ./protoc-gen-elm
+OUT=elm-protobuf-${VERSION}-linux-x86_32
+GOOS=linux GOARCH=386 go build -o ./bin/${OUT}/${BIN} ./${BIN}
 tar -zcvf ./bin/${OUT}.tar.gz ./bin/${OUT}
 
-OUT=elm-protobuf-${TAG}-linux-x86_64
-GOOS=linux GOARCH=amd64 go build -o ./bin/${OUT}/protoc-gen-elm ./protoc-gen-elm
+OUT=elm-protobuf-${VERSION}-linux-x86_64
+GOOS=linux GOARCH=amd64 go build -o ./bin/${OUT}/${BIN} ./${BIN}
 tar -zcvf ./bin/${OUT}.tar.gz ./bin/${OUT}
 
-OUT=elm-protobuf-${TAG}-osx-x86_32
-GOOS=darwin GOARCH=386 go build -o ./bin/${OUT}/protoc-gen-elm ./protoc-gen-elm
+OUT=elm-protobuf-${VERSION}-osx-x86_32
+GOOS=darwin GOARCH=386 go build -o ./bin/${OUT}/${BIN} ./${BIN}
 tar -zcvf ./bin/${OUT}.tar.gz ./bin/${OUT}
 
-OUT=elm-protobuf-${TAG}-osx-x86_64
-GOOS=darwin GOARCH=amd64 go build -o ./bin/${OUT}/protoc-gen-elm ./protoc-gen-elm
+OUT=elm-protobuf-${VERSION}-osx-x86_64
+GOOS=darwin GOARCH=amd64 go build -o ./bin/${OUT}/${BIN} ./${BIN}
 tar -zcvf ./bin/${OUT}.tar.gz ./bin/${OUT}