Lint with GH actions

.github/workflows/Dockerfile

@@ -7,16 +7,8 @@ RUN apt-get -qq update \
     build-essential \
     curl \
     git \
-    mercurial \
-    make \
-    binutils \
-    bison \
-    gcc \
-    gobject-introspection \
     libglib2.0-dev \
-    libexpat1-dev \
     libxml2-dev \
-    libfftw3-dev \
     libjpeg-dev \
     libpng-dev \
     libwebp-dev \
@@ -27,9 +19,8 @@ RUN apt-get -qq update \
     libavformat-dev \
     libavutil-dev \
     libswscale-dev \
-    libopencv-dev
-
-RUN curl -s -S -L https://raw.githubusercontent.com/moovweb/gvm/master/binscripts/gvm-installer | bash -
+    libopencv-core-dev \
+    libopencv-dnn-dev
 
 RUN \
   mkdir /root/vips \
@@ -59,7 +50,14 @@ RUN \
     && rm -rf $VIPS_RELEASE.tar.gz vips-$VIPS_RELEASE; \
   done
 
+RUN echo "Name: OpenCV\n" \
+  "Description: Open Source Computer Vision Library\n" \
+  "Version: 4.5.1\n" \
+  "Libs: -L/usr/lib/x86_64-linux-gnu -lopencv_dnn -lopencv_imgproc -lopencv_core\n" \
+  "Libs.private: -ldl -lm -lpthread -lrt\n" \
+  "Cflags: -I/usr/include/opencv4\n" \
+  > /usr/lib/x86_64-linux-gnu/pkgconfig/opencv4.pc
+
 WORKDIR /go/src
-ENV GOPATH=/go
 
 ENTRYPOINT [ "/bin/bash" ]

.github/workflows/lint.yml

@@ -0,0 +1,40 @@
+name: Lint
+
+on:
+  - push
+  - pull_request
+
+env:
+  CGO_LDFLAGS_ALLOW: "-s|-w"
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    container:
+      image: darthsim/imgproxy-ci:latest
+    strategy:
+      matrix:
+        go-version: ["1.18.x"]
+        vips-version: ["8.12"]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - uses: actions/setup-go@v2
+        with:
+          go-version: ${{ matrix.go-version }}
+      - name: Cache mods
+        uses: actions/cache@v3
+        with:
+          path: ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+      - name: Download mods
+        run: go mod download
+      - name: Lint
+        uses: golangci/golangci-lint-action@v3
+        with:
+          version: v1.45.2
+          args: --timeout 2m0s
+          skip-cache: true
+        env:
+          LD_LIBRARY_PATH: "${{ env.LD_LIBRARY_PATH }}:/root/vips/${{ matrix.vips-version }}/lib"
+          PKG_CONFIG_PATH: "${{ env.PKG_CONFIG_PATH }}:/root/vips/${{ matrix.vips-version }}/lib/pkgconfig"