Adds github workflow ci action

.github/workflows/ci.yml

@@ -0,0 +1,63 @@
+name: CI
+
+on:
+  push:
+    branches: ["*"]
+  pull_request:
+    branches: ["*"]
+
+jobs:
+  lint:
+    runs-on: ${{ matrix.os }}
+    env:
+      MIX_ENV: dev
+    name: Lint
+    strategy:
+      matrix:
+        os: ["ubuntu-20.04"]
+        elixir: ["1.15"]
+        otp: ["26"]
+    steps:
+      - uses: actions/checkout@v3
+      - uses: erlef/setup-beam@v1
+        with:
+          otp-version: ${{ matrix.otp }}
+          elixir-version: ${{ matrix.elixir }}
+      - uses: actions/cache@v3
+        with:
+          path: deps
+          key: ${{ matrix.os }}-otp_${{ matrix.otp }}-elixir_${{ matrix.elixir }}-mix_${{ hashFiles('**/mix.lock') }}
+          restore-keys: ${{ matrix.os }}-otp_${{ matrix.otp }}-elixir_${{ matrix.elixir }}-mix_
+      - run: mix deps.get
+      - run: mix deps.compile
+      - run: mix lint
+
+  test:
+    runs-on: ${{ matrix.os }}
+    name: Test Elixir ${{ matrix.elixir }}, OTP ${{ matrix.otp }}, OS ${{ matrix.os }}
+    env:
+      MIX_ENV: test
+    strategy:
+      fail-fast: false
+      matrix:
+        os: ["ubuntu-20.04"]
+        elixir: ["1.15", "1.14", "1.13"]
+        otp: ["26", "25", "24"]
+        exclude:
+          - elixir: "1.13"
+            otp: "26"
+    steps:
+      - uses: actions/checkout@v3
+      - uses: erlef/setup-beam@v1
+        with:
+          otp-version: ${{ matrix.otp }}
+          elixir-version: ${{ matrix.elixir }}
+      - uses: actions/cache@v3
+        with:
+          path: deps
+          key: ${{ matrix.os }}-otp_${{ matrix.otp }}-elixir_${{ matrix.elixir }}-mix_${{ hashFiles('**/mix.lock') }}
+          restore-keys: ${{ matrix.os }}-otp_${{ matrix.otp }}-elixir_${{ matrix.elixir }}-mix_
+      - run: mix deps.get --only test
+      - run: mix deps.compile
+      - run: mix compile
+      - run: mix test

lib/ex_image_info.ex

@@ -1,6 +1,5 @@
 defmodule ExImageInfo do
-
-  alias ExImageInfo.Types.{PNG, GIF, JPEG, BMP, TIFF, WEBP, PSD, JP2, PNM, ICO}
+  alias ExImageInfo.Types.{BMP, GIF, ICO, JP2, JPEG, PNG, PNM, PSD, TIFF, WEBP}
 
   @moduledoc """
   ExImageInfo is an Elixir library to parse images (binaries) and get the dimensions (size), detected mime-type and overall validity for a set of image formats. Main module to parse a binary and get if it seems to be an image (validity), the mime-type (and variant detected) and the dimensions of the image, based on a specific image format.

mix.exs

@@ -37,7 +37,11 @@ defmodule ExImageInfo.Mixfile do
   defp aliases do
     [
       test_wip: ["test --only wip"],
-      docs: ["docs", &copy_doc_to_docs/1]
+      docs: ["docs", &copy_doc_to_docs/1],
+      lint: [
+        "deps.unlock --check-unused",
+        "credo --all --strict"
+      ]
     ]
   end
 

test/ex_image_info_test/images/gif_test.exs

@@ -12,7 +12,6 @@ defmodule ExImageInfoTest.Images.GIFTest do
     {:ok, images}
   end
 
-
   test "force - gif (gif87a, gif89a) disk image - #seems? #type #info", images do
     assert seems?(images["gif87a"], :gif) == true
     assert seems?(images["gif89a"], :gif) == true

test/ex_image_info_test/images/png_test.exs

@@ -10,7 +10,6 @@ defmodule ExImageInfoTest.Images.PNGTest do
     {:ok, images}
   end
 
-
   test "force - png disk image - #seems? #type #info", images do
     assert seems?(images["png"], :png) == true
     assert type(images["png"], :png) == {"image/png", "PNG"}