Add hex to GH action

.github/workflows/hex.yaml

@@ -0,0 +1,26 @@
+name: publish to hex.pm
+
+on:
+  push:
+    tags:
+      - '*'
+
+jobs:
+  publish:
+    runs-on: ubuntu-20.04
+    container:
+      image: erlang:23.2.5.0-alpine
+    steps:
+    - name: Prepare
+      run: |
+           apk update
+           apk --no-cache upgrade
+           apk --no-cache add gcc git libc-dev libc-utils libgcc linux-headers make bash \
+                              musl-dev musl-utils ncurses-dev pcre2 pkgconf scanelf wget zlib
+    - uses: actions/checkout@v2
+    - name: Publish to Hex.pm
+      env:
+        HEX_API_KEY: ${{ secrets.HEX_API_KEY }}
+      run: |
+           rebar3 edoc
+           rebar3 hex publish -r hexpm --yes

README.md

@@ -1,5 +1,7 @@
 regine - modular Erlang process registry
 ========================================
+[![Hex.pm Version][hexpm version]][hexpm]
+[![Hex.pm Downloads][hexpm downloads]][hexpm]
 [![Build Status][gh badge]][gh]
 [![Coverage Status][coveralls badge]][coveralls]
 [![Erlang Versions][erlang version badge]][gh]
@@ -23,6 +25,9 @@ Using rebar3:
 [1]: https://github.com/uwiger/gproc
 
 <!-- Badges -->
+[hexpm]: https://hex.pm/packages/regine
+[hexpm version]: https://img.shields.io/hexpm/v/regine.svg?style=flat
+[hexpm downloads]: https://img.shields.io/hexpm/dt/regine.svg?style=flat
 [gh]: https://github.com/travelping/regine/actions/workflows/main.yml
 [gh badge]: https://img.shields.io/github/workflow/status/travelping/regine/CI?style=flat-square
 [coveralls]: https://coveralls.io/github/travelping/regine

rebar.config

@@ -19,6 +19,8 @@
 	       locals_not_used, deprecated_function_calls,
 	       deprecated_funcqtions]}.
 
+{plugins, [rebar3_hex]}.
+
 %% == Cover ==
 %% Whether to enable coverage reporting. Default is `false'
 {cover_enabled, true}.