Update workflow to use release branches

release

@@ -2,22 +2,38 @@
 
 # set -x
 
+# Usage:
+#   
+#   release X.X.X
+# 
+# Creates a new version of the package. This script creates a new release branch
+# where it updates the version variable. It then creates a matching tag and 
+# pushes both to GitHub.
+
+# The file holding a version variable.
+VERSION_FILE=meta.go
+
+function create_release_branch {
+  local version="$1"
+  git checkout -b "releases/${version}"
+}
+
 function update_version {
   local version="$1"
-  sed -i.backup "s/var Version =.*/var Version = \"${version}\"/" meta.go
-  rm -rf meta.go.backup
+  sed -i.backup "s/var Version =.*/var Version = \"${version}\"/" "${VERSION_FILE}"
+  rm -rf "${VERSION_FILE}.backup"
 }
 
 function commit_changes {
   local version="$1"
-  git add meta.go
+  git add "${VERSION_FILE}"
   git commit -m "v${version}"
   git tag -a "v${version}" -m "v${version}"
 }
 
 function push_changes {
   local version="$1"
-  git push origin master
+  git push origin "releases/${version}"
   git push origin "v${version}"
 }
 
@@ -31,9 +47,15 @@ function main {
     echo "version $version already exists"
     exit 1
   fi
+
+  local current_branch=$(git rev-parse --symbolic-full-name --abbrev-ref HEAD)
+
+  create_release_branch $version
   update_version $version
   commit_changes $version
   push_changes $version
+
+  git checkout $current_branch
 }
 
 main "$@"