test: use unpath

Dockerfile

@@ -1,6 +1,7 @@
 FROM ruby:3.3
 
 ARG IMAGE_MAGICK_VERSION=7.1.1-33
+ARG UNPATH_VERSION=0.1.0
 
 # throw errors if Gemfile has been modified since Gemfile.lock
 RUN bundle config --global frozen 1
@@ -21,6 +22,10 @@ RUN apt-get update && apt-get install -y \
     libvips-tools && \
     rm -rf /var/lib/apt/lists/*
 
+RUN curl --location https://github.com/3v0k4/unpath/releases/download/v$UNPATH_VERSION/unpath-linux-amd64 --output unpath && \
+    chmod +x unpath && \
+    mv unpath /usr/local/sbin
+
 WORKDIR /usr/src/app
 
 COPY lib/favicon_factory/version.rb ./lib/favicon_factory/version.rb

Rakefile

@@ -19,14 +19,12 @@ namespace :test do
   task :e2e do
     require "open3"
 
+    unpath_vips = "unpath libvips unpath libvips-tools unpath vips"
     statuses = [
       ["bin/rake test N=/e2e__with_deps/"],
-      ["apt-get remove -y --purge libvips libvips-tools && bin/rake test N=/e2e__with_deps/"],
+      ["#{unpath_vips} bin/rake test N=/e2e__with_deps/"],
       ["apt-get remove -y --purge *imagemagick* inkscape libvips libvips-tools && bin/rake test N=/e2e__without_deps/"],
-      [
-        "apt-get remove -y --purge libvips libvips-tools && bin/rake test N=/e2e__with_deps/",
-        "--build-arg IMAGE_MAGICK_VERSION=6.9.13-11"
-      ]
+      ["#{unpath_vips} bin/rake test N=/e2e__with_deps/", "--build-arg IMAGE_MAGICK_VERSION=6.9.13-11"]
     ].map do |command, build_args|
       command = "docker run $(docker build -q #{build_args} .) bash -c '#{command}'"
       stdout, stderr, status = Open3.capture3(command)