Improvements to macOS test and work on homebrew tap autobrew

Squashed commits:
[3f06c1e] Try setting up homebrew tap autobuilding
[01532f1] Strict mode error in brew

.gitignore

@@ -4,6 +4,8 @@
 venv*/
 pyvenv.cfg
 tasks.py
+.bash_history
+.ruffus_history.sqlite
 
 # Package building
 *.egg-info/
@@ -27,8 +29,11 @@ htmlcov/
 # Testing
 log/
 /*.pdf
+/*.qdf
+*.ipynb
 .ipynb_checkpoints/
 tests/cache/
 tests/output/
 tests/resources/private/
 tmp/
+pdfbox-app*.jar

.travis.yml

@@ -1,4 +1,3 @@
-sudo: required
 dist: trusty
 language: python
 cache:
@@ -6,33 +5,36 @@ cache:
   directories:
   - packages
   - tests/cache
+  - $HOME/Library/Caches/Homebrew
 
-python:
-- '3.4'
-- '3.5'
-- '3.6'
-
-os:
-- linux
+matrix:
+  include:
+    - os: linux
+      sudo: required
+      language: python
+      python: 3.4
+    - os: linux
+      sudo: required
+      language: python
+      python: 3.5
+    - os: linux
+      sudo: required
+      language: python
+      python: 3.6
+    - os: osx
+      osx_image: xcode8
+      language: generic
 
 before_cache:
 - rm -f $HOME/.cache/pip/log/debug.log
 
 before_install:
-- sudo add-apt-repository ppa:vshn/ghostscript -y
-- sudo add-apt-repository ppa:heyarje/libav-11 -y
-- sudo apt-get update -qq
-- sudo apt-get install -y ghostscript tesseract-ocr tesseract-ocr-deu tesseract-ocr-eng
-  tesseract-ocr-fra qpdf poppler-utils libavformat56 libavcodec56 libavutil54 libffi-dev
-- pip install --upgrade pip
-- mkdir -p packages
-- "[ -f packages/unpaper_6.1-1.deb ] || wget -q https://dl.dropboxusercontent.com/u/28971240/unpaper_6.1-1.deb
-  -O packages/unpaper_6.1-1.deb"
-- sudo dpkg -i packages/unpaper_6.1-1.deb
+- if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then bash .travis/linux_before_install.sh ; fi
+- if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then bash .travis/osx_before_install.sh ; fi
 
 install:
-- pip install .
-- pip install -r requirements.txt -r test_requirements.txt
+- pip3 install .
+- pip3 install -r requirements.txt -r test_requirements.txt
 
 script:
 - mv ocrmypdf dont_import_this_ocrmypdf
@@ -51,5 +53,5 @@ deploy:
   on:
     branch: master
     tags: true
-    condition: $TRAVIS_PYTHON_VERSION = "3.6"
+    condition: $TRAVIS_PYTHON_VERSION == "3.6" && $TRAVIS_OS_NAME == "linux"
   skip_upload_docs: true

.travis/linux_before_install.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+sudo add-apt-repository ppa:vshn/ghostscript -y
+sudo add-apt-repository ppa:heyarje/libav-11 -y
+sudo apt-get update -qq
+sudo apt-get install -y \
+	ghostscript \
+	tesseract-ocr \
+	tesseract-ocr-deu \
+	tesseract-ocr-eng \
+	tesseract-ocr-fra \
+	qpdf \
+	poppler-utils \
+	libavformat56 \
+	libavcodec56 \
+	libavutil54 \
+	libffi-dev
+
+pip install --upgrade pip
+mkdir -p packages
+[ -f packages/unpaper_6.1-1.deb ] || wget -q https://dl.dropboxusercontent.com/u/28971240/unpaper_6.1-1.deb -O packages/unpaper_6.1-1.deb
+sudo dpkg -i packages/unpaper_6.1-1.deb

.travis/osx_before_install.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+brew update
+
+brew install libpng openjpeg jbig2dec libtiff     # image libraries
+brew install qpdf
+brew install ghostscript
+brew install python3
+brew install libxml2 libffi leptonica
+brew install unpaper   # optional
+brew install tesseract
+
+pip3 install --upgrade pip
+pip3 install wheel

tests/conftest.py

@@ -22,6 +22,11 @@ def is_linux():
     return platform.system() == 'Linux'
 
 
+@pytest.helpers.register
+def is_macos():
+    return platform.system() == 'Darwin'
+
+
 @pytest.helpers.register
 def running_in_docker():
     # Docker creates a file named /.dockerenv (newer versions) or
@@ -29,6 +34,11 @@ def running_in_docker():
     return os.path.exists('/.dockerenv') or os.path.exists('/.dockerinit')
 
 
+@pytest.helpers.register
+def running_in_travis():
+    return os.environ.get('TRAVIS') == 'true'
+
+
 TESTS_ROOT = os.path.abspath(os.path.dirname(__file__))
 SPOOF_PATH = os.path.join(TESTS_ROOT, 'spoof')
 PROJECT_ROOT = os.path.dirname(TESTS_ROOT)

tests/test_main.py

@@ -409,10 +409,14 @@ def test_force_ocr_on_pdf_with_no_images(spoof_tesseract_crash, resources,
     assert not os.path.exists(no_outpdf)
 
 
+@pytest.mark.skipif(
+    pytest.helpers.is_macos() and pytest.helpers.running_in_travis(),
+    reason="takes too long to install language packs in Travis macOS homebrew")
 def test_french(spoof_tesseract_cache, resources, outpdf):
     p, out, err = run_ocrmypdf(
         resources / 'francais.pdf', outpdf, '-l', 'fra',
         env=spoof_tesseract_cache)
+    print(os.environ)
     assert p.returncode == ExitCode.ok, \
         "This test may fail if Tesseract language packs are missing"