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

.gitignore

@@ -7,3 +7,4 @@ tetrapak/.local.cache
 *~
 rebar3
 rebar.lock
+doc

README.md

@@ -1,5 +1,7 @@
 gtplib
 ======
+[![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]
@@ -17,6 +19,9 @@ Using rebar:
     # rebar3 compile
 
 <!-- Badges -->
+[hexpm]: https://hex.pm/packages/gtplib
+[hexpm version]: https://img.shields.io/hexpm/v/gtplib.svg?style=flat-square
+[hexpm downloads]: https://img.shields.io/hexpm/dt/gtplib.svg?style=flat-square
 [gh]: https://github.com/travelping/gtplib/actions/workflows/main.yml
 [gh badge]: https://img.shields.io/github/workflow/status/travelping/gtplib/CI?style=flat-square
 [coveralls]: https://coveralls.io/github/travelping/gtplib

rebar.config

@@ -1,13 +1,15 @@
 %-*-Erlang-*-
 {erl_opts, [debug_info]}.
 
+{edoc_opts, [{preprocess, true}]}.
+
 {deps, [
 	{cut, "1.0.3"},
 	{ppplib, "1.0.0"}
 ]}.
 
 {minimum_otp_vsn, "21.3"}.
-{plugins, []}.
+{plugins, [rebar3_hex]}.
 
 {profiles, [
 	    {test,

src/gtplib.app.src

@@ -3,5 +3,7 @@
     {vsn, semver},
     {description, "Erlang library for GTP-c v1 and v2"},
     {applications, [kernel, stdlib]},
-    {registered, []}
+    {registered, []},
+    {licenses, ["Mozilla Public License 2.0"]},
+    {links, [{"Github", "https://github.com/travelping/gtplib"}]}
 ]}.