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+<a id='x-28DOCS-3A-40INDEX-20MGL-PAX-MINIMAL-3ASECTION-29'></a>
+
+# GitHub Action to Setup Common Lisp for CI
+
+## Table of Contents
+
+- [1 What this action does for you?][f73c]
+- [2 A typical usage][ff56]
+- [3 Overriding qlfile][d1d0]
+- [4 Roadmap][278a]
+
+###### \[in package DOCS with nicknames DOCS/DOCS\]
+This is a Github Action to setup Common Lisp, Roswell and Qlot.
+
+It is useful to call it before running tests or building docs
+for your Common Lisp libraries. Action encapsulates all steps
+necessary to make available [Roswell](https://github.com/roswell/roswell)
+and [Qlot](https://github.com/fukamachi/qlot) inside the Github CI.
+
+<a id='x-28DOCS-3A-40FEATURES-20MGL-PAX-MINIMAL-3ASECTION-29'></a>
+
+## 1 What this action does for you?
+
+- It installs Roswell and all it's dependencies, doing right thing depending on
+  the operating system. It should work on Ubuntu, OSX and maybe Windows.
+
+- Upgrade `ASDF` to the latest version.
+
+- Installs Qlot.
+
+- Adds to `PATH` these directories: `~/.roswell/bin` and `.qlot/bin`
+
+- Creates `.qlot` by running `qlot install`. How to override content of the
+  `qlfile`, see "Overriding qlfile" section.
+
+- And finally, it can install a specified `ASDF` system and all it's dependencies.
+  But this step is optional.
+
+
+<a id='x-28DOCS-3A-40TYPICAL-USAGE-20MGL-PAX-MINIMAL-3ASECTION-29'></a>
+
+## 2 A typical usage
+
+Here is how a minimal GitHub Workflow might look like:
+
+```yaml
+name: 'CI'
+
+on:
+  push:
+    branches:
+      - 'main'
+      - 'master'
+  pull_request:
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    
+    strategy:
+      matrix:
+        lisp:
+          - sbcl-bin
+          - ccl-bin
+          
+    env:
+      LISP: ${{ matrix.lisp }}
+
+    steps:
+      - uses: actions/checkout@v1
+      - uses: 40ants/setup-lisp@v1
+        with:
+          asdf-system: cl-info
+      - uses: 40ants/run-tests@v2-beta
+        with:
+          asdf-system: cl-info
+```
+
+The part, corresponding to an actionn call is:
+
+```yaml
+- uses: 40ants/setup-lisp@v1
+  with:
+    asdf-system: cl-info
+```
+
+If you remove `with` part, then action will skip the `ASDF` system
+installation.
+
+The last step in this workflow runs tests for the specified `ASDF`
+system. It is documented [here](https://40ants/run-tests).
+
+<a id='x-28DOCS-3A-40QL-FILE-20MGL-PAX-MINIMAL-3ASECTION-29'></a>
+
+## 3 Overriding qlfile
+
+Sometimes you might want to generate content of qlfile
+depending on matrix parameters. For example with matrix like this one:
+
+```yaml
+matrix:
+  os:
+    - ubuntu-latest
+    - macos-latest
+  quicklisp-dist:
+    - quicklisp
+    - ultralisp
+  lisp:
+    - sbcl-bin
+    - ccl-bin
+    - ecl
+```
+
+you might want to add an [ultralisp](https://ultralisp.org) source
+to the qlfile. Here is how this can be archived:
+
+```yaml
+env:
+  LISP: ${{ matrix.lisp }}
+  OS: ${{ matrix.os }}
+  QUICKLISP_DIST: ${{ matrix.quicklisp-dist }}
+
+steps:
+  - uses: actions/checkout@v1
+  - uses: 40ants/setup-lisp@v1
+    with:
+      asdf-system: cl-info
+      qlfile-template: |
+        {% ifequal quicklisp_dist "ultralisp" %}
+        dist ultralisp http://dist.ultralisp.org
+        {% endifequal %}
+
+        github mgl-pax svetlyak40wt/mgl-pax :branch mgl-pax-minimal
+```
+
+Here we see a few important things.
+
+1. We put into the env var the type of the quicklisp distribution we want to
+   our library to test against.
+
+2. We pass a multiline argument `qlfile-template` to the action.
+
+3. Template refers to `quicklisp_dist` to conditionally include a line
+   into `qlfile` when `quicklisp_dist == "ultralisp"`.
+
+You can refer any environment variable inside the `qlfile` templater.
+Also note, it is using [Djula](https://github.com/mmontone/djula)
+markup, similar to [Django](https://docs.djangoproject.com/en/3.1/topics/templates/)
+and [Jinja2](https://jinja.palletsprojects.com/).
+
+<a id='x-28DOCS-3A-40ROADMAP-20MGL-PAX-MINIMAL-3ASECTION-29'></a>
+
+## 4 Roadmap
+
+- Make action use caching to speedup dependencies installation.
+
+- Support [CLPM](https://gitlab.common-lisp.net/clpm/clpm).
+
+- Vendor all dependencies, to make action more reliable and secure.
+
+
+  [278a]: #x-28DOCS-3A-40ROADMAP-20MGL-PAX-MINIMAL-3ASECTION-29 "Roadmap"
+  [d1d0]: #x-28DOCS-3A-40QL-FILE-20MGL-PAX-MINIMAL-3ASECTION-29 "Overriding qlfile"
+  [f73c]: #x-28DOCS-3A-40FEATURES-20MGL-PAX-MINIMAL-3ASECTION-29 "What this action does for you?"
+  [ff56]: #x-28DOCS-3A-40TYPICAL-USAGE-20MGL-PAX-MINIMAL-3ASECTION-29 "A typical usage"
+
+* * *
+###### \[generated by [MGL-PAX](https://github.com/melisgl/mgl-pax)\]