docs: new package magic-version (#57)

Author: shaunthegeek

_posts/2021-08-14-magic-version.md

@@ -0,0 +1,37 @@
+---
+layout: post
+title: "magic-version"
+description: "calculate version from CI env"
+category: ci
+tags: [coding, github, ci, jenkins]
+---
+
+calculate version for CI (CODING, GitHub Actions, Jenkins)
+
+when   | version
+-------|---------
+tag    | 1.2.0
+branch | main-3a11e12
+MR     | mr-123-3a11e12
+PR(GitHub) | pr-123-3a11e12
+
+```bash
+bpkg install [-g] sinkcup/magic-version
+```
+
+## Usage
+
+```bash
+export TAG_NAME=1.2.0
+magic-version
+```
+
+> 1.2.0
+
+more examples in [test code](https://github.com/sinkcup/magic-version/tree/main/test)
+
+## Links
+
+* [Source Code](https://github.com/sinkcup/magic-version)
+* [Author: sink](https://github.com/sinkcup)
+