Add a short_tag attribute to git context

Author: marcospereira

mkdocs_macros/context.py

@@ -141,6 +141,8 @@ def get_git_info():
         'short_commit': ['git', 'rev-parse', '--short', 'HEAD'],
         'commit': ['git', 'rev-parse', 'HEAD'],
         'tag': ['git', 'describe', '--tags'],
+        # With --abbrev set to 0, git will find the closest tagname without any suffix
+        'short_tag': ['git', 'describe', '--tags', '--abbrev=0'],
         'author': LAST_COMMIT + ["--pretty=format:%an"],
         'author_email': LAST_COMMIT + ["--pretty=format:%ae"],
         'committer': LAST_COMMIT + ["--pretty=format:%cn"],

webdoc/docs/git_info.md

@@ -52,14 +52,15 @@ Here is a list of attributes of the git object:
 
 
 | Attribute         | Description                                    |
-| ----------------- | ---------------------------------------------- |
+|-------------------|------------------------------------------------|
 | `short_commit`    | short hash of the last commit (e.g. _2bd7950_) |
 | `commit`          | long hash of the last commit                   |
 | `author`          | author's name                                  |
 | `author_email`    | author's email                                 |
 | `committer`       | committer's name                               |
 | `committer_email` | committer's email                              |
 | `tag`             | last active tag of the repo                    |
+| `short_tag`       | last active tag of the repo, abbreviated       |
 | `date`            | full date of the commit (as a date object)     |
 | `date_ISO`        | full date of the commit (as an ISO string)     |
 | `message`         | full message of the last commit                |
@@ -104,6 +105,13 @@ which would return e.g.
 
     May 13, 2020 16:08:52        
 
+## `tag` and `short_tag`
+
+The tag attribute shows the full description of the tag, for
+example `v1.0.4-14-g2414721`. Meanwhile, `short_tag` shows the
+tag name without any suffix, for example `v1.0.4`. The later can
+be usefull when showing the latest release.
+
 ## Tip: Is this really a git repo?
 
 In case you are not sure that there really is a git repo, you could use: