docs: add alternatives section

docs/docs/intro.md

@@ -13,17 +13,29 @@ clones repositories at a particular version, then overlays the repository to
 the provided destination. An alternate approach to "vendoring".
 
 What makes Gilt interesting, is the ability to overlay particular files and/or
-directories from the specified repository to given destinations. This is quite
-helpful for those using Ansible, since libraries, plugins, and playbooks are
-often shared, but Ansible's [Galaxy][] has no mechanism to handle this.
+directories from the specified repository to given destinations. Originally,
+this was quite helpful for those using Ansible, since libraries, plugins, and
+playbooks are often shared, but Ansible's [Galaxy][] has no mechanism to handle
+this. Currently, this is proving useful for overlaying [Helm charts].
 
 <br clear="left"/>
 
+## Alternatives
+
+* [Repo][]
+* [Git submodules][]
+* [Git subtree][]
+* [Gilt][]
+
 ## History
 
 This project is a golang port of [Gilt][], and aims to correct poor decisions
 made in the python version, primarially around config syntax, portability,
 and reproducibility.
 
 [Galaxy]: https://docs.ansible.com/ansible/latest/reference_appendices/galaxy.html
+[Helm charts]: https://helm.sh/docs/topics/charts/
+[Repo]: https://gerrit.googlesource.com/git-repo/+/refs/heads/master/README.md
+[Git submodules]: https://git-scm.com/book/en/v2/Git-Tools-Submodules
+[Git subtree]: https://github.com/git/git/blob/master/contrib/subtree/git-subtree.txt
 [Gilt]: http:https://gilt.readthedocs.io/en/latest/

docs/versioned_docs/version-1.0.2/intro.md

@@ -13,17 +13,29 @@ clones repositories at a particular version, then overlays the repository to
 the provided destination. An alternate approach to "vendoring".
 
 What makes Gilt interesting, is the ability to overlay particular files and/or
-directories from the specified repository to given destinations. This is quite
-helpful for those using Ansible, since libraries, plugins, and playbooks are
-often shared, but Ansible's [Galaxy][] has no mechanism to handle this.
+directories from the specified repository to given destinations. Originally,
+this was quite helpful for those using Ansible, since libraries, plugins, and
+playbooks are often shared, but Ansible's [Galaxy][] has no mechanism to handle
+this. Currently, this is proving useful for overlaying [Helm charts].
 
 <br clear="left"/>
 
+## Alternatives
+
+* [Repo][]
+* [Git submodules][]
+* [Git subtree][]
+* [Gilt][]
+
 ## History
 
 This project is a golang port of [Gilt][], and aims to correct poor decisions
 made in the python version, primarially around config syntax, portability,
 and reproducibility.
 
 [Galaxy]: https://docs.ansible.com/ansible/latest/reference_appendices/galaxy.html
+[Helm charts]: https://helm.sh/docs/topics/charts/
+[Repo]: https://gerrit.googlesource.com/git-repo/+/refs/heads/master/README.md
+[Git submodules]: https://git-scm.com/book/en/v2/Git-Tools-Submodules
+[Git subtree]: https://github.com/git/git/blob/master/contrib/subtree/git-subtree.txt
 [Gilt]: http:https://gilt.readthedocs.io/en/latest/