Add im6 docker support for tests and update travis config

.travis.yml

@@ -1,50 +1,33 @@
-language: go
 sudo: required
-
-go:
-  - 1.9.x
 
-cache:
-  directories:
-  - "$HOME/opt"
-
+language: generic
+
+services:
+  - docker
+
 env:
   global:
-    - GOARCH=amd64
-    - IMAGEMAGICK_VERSION=$IMAGEMAGICK6_VERSION # Set externally by Travis 
-
+    - DOCKER_IMAGE=gographics/imagick.v2:im-$IMAGEMAGICK6_VERSION
+    - CACHE_DIR=$HOME/.cache
+    - DOCKER_CACHE_DIR=$CACHE_DIR/docker
+
+cache:
+  directories:
+    - $DOCKER_CACHE_DIR
+
 before_install:
-  # Update PATH so that travis can find newer imagemagick
-  - export PATH=$HOME/opt/bin:$PATH
-
-  # Build ImageMagick from source
-  - convert -version | grep $IMAGEMAGICK_VERSION || {
-    export CORES=$(nproc) && 
-    echo "Using $CORES cores for compiling..." && 
-    cd /tmp && 
-    sudo apt-get install build-essential -y && 
-    sudo apt-get build-dep imagemagick -y && 
-    wget "https://github.com/ImageMagick/ImageMagick6/archive/${IMAGEMAGICK_VERSION}.tar.gz" && 
-    tar -xvf "${IMAGEMAGICK_VERSION}.tar.gz" && 
-    cd "ImageMagick6-${IMAGEMAGICK_VERSION}" && 
-    ./configure --prefix=$HOME/opt --without-magick-plus-plus --without-perl --disable-openmp --with-gvc=no && 
-    make -j$CORES && sudo make install && sudo ldconfig && 
-    $HOME/opt/bin/convert -version | grep $IMAGEMAGICK_VERSION && 
-    cd $TRAVIS_BUILD_DIR; }
-
-  # Update library paths for programs
-  - export LD_FLAGS=-L$HOME/opt/lib
-  - export LD_LIBRARY_PATH=/lib:/usr/lib:/usr/local/lib:$HOME/opt/lib
-  - export CPATH=$CPATH:$HOME/opt/include
-  - export LD_LIBRARY_PATH=/lib:/usr/lib:/usr/local/lib:$HOME/opt/lib
-  - export PKG_CONFIG_PATH=$HOME/opt/lib/pkgconfig
-
-  # Set the import path for the particular branch of imagick bindings
-  - export IMAGICK_IMPORT_PATH=$(grep gopkg.in/gographics/imagick.v imagick/imagick.go | cut -d\" -f2)
+  # load cached Docker images
+  - if [[ -d $DOCKER_CACHE_DIR ]]; then ls $DOCKER_CACHE_DIR/*.tar.gz | xargs -I {file} sh -c "zcat {file} | docker load"; fi
 
 install:
-  - pkg-config --cflags --libs MagickWand
-  - go get $IMAGICK_IMPORT_PATH
+  - docker build -f Dockerfile --cache-from $DOCKER_IMAGE -t $DOCKER_IMAGE .
+
+script:
+  - docker run -it --rm -v $PWD:/go/projects/imagick $DOCKER_IMAGE
 
-script: 
-  - go test -v $IMAGICK_IMPORT_PATH
+before_cache:
+  # save tagged Docker images
+  # https://github.com/travis-ci/travis-ci/issues/5358#issuecomment-248915326
+  - >
+    mkdir -p $DOCKER_CACHE_DIR && docker images -a --filter='dangling=false' --format '{{.Repository}}:{{.Tag}} {{.ID}}'
+    | xargs -n 2 -t sh -c 'test -e $DOCKER_CACHE_DIR/$1.tar.gz || docker save $0 | gzip -2 > $DOCKER_CACHE_DIR/$1.tar.gz'

Dockerfile

@@ -0,0 +1,45 @@
+FROM golang:1.13
+
+# Ignore APT warnings about not having a TTY
+ENV DEBIAN_FRONTEND noninteractive
+
+RUN apt-get update \
+    && apt-get install -y \
+        wget build-essential \
+        pkg-config \
+        --no-install-recommends \
+    && apt-get -q -y install \
+        libjpeg-dev \
+        libpng-dev \
+        libtiff-dev \
+        libgif-dev \
+        libx11-dev \
+        fontconfig fontconfig-config libfontconfig1-dev \
+        ghostscript gsfonts gsfonts-x11 \
+        libfreetype6-dev \
+        --no-install-recommends \
+    && rm -rf /var/lib/apt/lists/*
+
+ARG IMAGEMAGICK_PROJECT=ImageMagick6
+ARG IMAGEMAGICK_VERSION=6.9.10-11
+ENV IMAGEMAGICK_VERSION=$IMAGEMAGICK_VERSION
+
+RUN cd && \
+	wget https://github.com/ImageMagick/${IMAGEMAGICK_PROJECT}/archive/${IMAGEMAGICK_VERSION}.tar.gz && \
+	tar xvzf ${IMAGEMAGICK_VERSION}.tar.gz && \
+	cd ImageMagick* && \
+	./configure \
+	    --without-magick-plus-plus \
+	    --without-perl \
+	    --disable-openmp \
+	    --with-gvc=no \
+	    --with-fontconfig=yes \
+	    --with-freetype=yes \
+	    --with-gslib \
+	    --disable-docs && \
+	make -j$(nproc) && make install && \
+	ldconfig /usr/local/lib
+
+WORKDIR /go/projects/imagick
+
+CMD go test -v ./imagick

go.mod

@@ -0,0 +1,3 @@
+module gopkg.in/gographics/imagick.v2
+
+go 1.13