Merge pull request #7324 from prometheus/superq/tag-release-alias

Update RELEASE doc

RELEASE.md

@@ -103,11 +103,20 @@ Entries in the `CHANGELOG.md` are meant to be in this order:
 Tag the new release via the following commands:
 
 ```bash
-$ tag=$(< VERSION)
-$ git tag -s "v${tag}" -m "v${tag}"
-$ git push origin "v${tag}"
+$ tag="v$(< VERSION)"
+$ git tag -s "${tag}" -m "${tag}"
+$ git push origin "${tag}"
 ```
 
+Optionally, you can use this handy `.gitconfig` alias.
+
+```ini
+[alias]
+  tag-release = "!f() { tag=v${1:-$(cat VERSION)} ; git tag -s ${tag} -m ${tag} && git push origin ${tag}; }; f"
+```
+
+Then release with `git tag-release`.
+
 Signing a tag with a GPG key is appreciated, but in case you can't add a GPG key to your Github account using the following [procedure](https://help.github.com/articles/generating-a-gpg-key/), you can replace the `-s` flag by `-a` flag of the `git tag` command to only annotate the tag without signing.
 
 Once a tag is created, the release process through CircleCI will be triggered for this tag and Circle CI will draft the GitHub release using the `prombot` account.