Try to make it build with docker

Author: Paxa

.dockerignore

@@ -0,0 +1,2 @@
+libxlsxwriter
+.git

.gitignore

@@ -8,6 +8,9 @@ gen_ffi.rb
 a.out
 .DS_Store
 *.gem
+*.cmake
+libxlsxwriter/CmakeFiles
+libxlsxwriter/CmakeCache.txt
 libxlsxwriter/dev
 libxlsxwriter/docs
 libxlsxwriter/examples

.travis.yml

@@ -21,6 +21,7 @@ matrix:
     rvm: 2.5.5
   - os: linux
     rvm: 2.6.3
+    env: BUILD_DOCKER=true
   - os: osx
     rvm: 2.6.3
     osx_image: xcode10.2
@@ -38,3 +39,4 @@ script:
   - make
   - bundle exec rake test
   - bundle exec rake examples
+  - [ -z "$BUILD_DOCKER" ] && docker build . -f Dockerfile.test --build-arg TRAVIS_COMMIT || true

Dockerfile.test

@@ -0,0 +1,15 @@
+FROM ruby
+
+RUN gem install fast_excel
+
+ARG TRAVIS_COMMIT
+
+RUN echo "source 'https://rubygems.org'" > Gemfile
+
+RUN [ -z "$TRAVIS_COMMIT" ] && \
+  echo "gem 'fast_excel', git: 'https://github.com/Paxa/fast_excel.git'" >> Gemfile || true
+RUN [ -z "$TRAVIS_COMMIT" ] || \
+  echo "gem 'fast_excel', git: 'https://github.com/Paxa/fast_excel.git', ref: '$TRAVIS_COMMIT'" >> Gemfile
+
+RUN cat Gemfile
+RUN bundle

Makefile

@@ -3,11 +3,22 @@ ifdef V
 Q=
 endif
 
+# with xcode better to use cmake
+UNAME_S := $(shell uname -s)
+ifeq ($(UNAME_S),"Darwin")
+	USE_CMAKE := $(shell command -v cmake 2> /dev/null)
+endif
+
 all :
 	@echo "Compiling ext/text_width ..."
 	rake compile
 	@echo "Compiling libxlsxwriter ..."
+ifdef USE_CMAKE
+	@echo "run cmake libxlsxwriter ..."
+	cmake libxlsxwriter
+else
 	$(Q)$(MAKE) -C libxlsxwriter
+endif
 
 clean :
 	$(Q)$(MAKE) clean -C libxlsxwriter

libxlsxwriter/Makefile

@@ -34,8 +34,8 @@ examples :
 # Clean src and test directories.
 clean :
 	$(Q)$(MAKE) clean -C src
-	$(Q)$(MAKE) clean -C test/unit
-	$(Q)$(MAKE) clean -C test/functional/src
+	# $(Q)$(MAKE) clean -C test/unit
+	# $(Q)$(MAKE) clean -C test/functional/src
 	$(Q)$(MAKE) clean -C examples
 	$(Q)rm -rf docs/html
 	$(Q)rm -rf test/functional/__pycache__