littlefs: Integrated littlefs's .travis.yml into mbed OS

Also cleaned up the central .travis.yml to better support
similar local testing in Travis CI

.travis.yml

@@ -1,40 +1,62 @@
 python:
   - "2.7"
+
 script:
-  - mkdir BUILD
+  # Assert that the Doxygen build produced no warnings.
-# Assert that the Doxygen build produced no warnings.
+  # The strange command below asserts that the Doxygen command had an
-# The strange command below asserts that the Doxygen command had an
+  # output of zero length
-# output of zero length
   - |
     doxygen doxyfile_options 2>&1 | tee BUILD/doxygen.out && [ ! -s BUILD/doxygen.out ]
-# Assert that all binary libraries are named correctly
+  # Assert that all binary libraries are named correctly
-# The strange command below asserts that there are exactly 0 libraries that do
+  # The strange command below asserts that there are exactly 0 libraries that do
-# not start with lib
+  # not start with lib
   - |
     find "(" -name "*.a" -or -name "*.ar" ")" -and -not -name "lib*" | tee BUILD/badlibs | sed -e "s/^/Bad library name found: /" && [ ! -s BUILD/badlibs ]
-# Assert that all assebler files are named correctly
+  # Assert that all assebler files are named correctly
-# The strange command below asserts that there are exactly 0 libraries that do
+  # The strange command below asserts that there are exactly 0 libraries that do
-# end with .s
+  # end with .s
   - |
     find  -name "*.s" | tee BUILD/badasm | sed -e "s/^/Bad Assembler file name found: /" && [ ! -s BUILD/badasm ]
-  - make -C events/equeue test clean
+  # Run local testing on tools
+  # Note: These take ~40 minutes to run
   - PYTHONPATH=. coverage run -a -m pytest tools/test
   - python2 tools/test/pylint.py
-  - coverage run -a tools/project.py -S
+  - coverage run -a tools/project.py -S | sed -n '/^Total/p'
-  - python2 tools/build_travis.py
+  - python2 -u tools/build_travis.py | sed -n '/^Executing/p'
   - coverage html
+  # Run local event queue tests
+  - make -C events/equeue test
+  # Run local littlefs tests
+  - CFLAGS="-Wno-format" make -Cfeatures/filesystem/littlefs/littlefs test QUIET=1
+  # Run local littlefs tests with set of variations
+  - CFLAGS="-Wno-format -DLFS_READ_SIZE=64 -DLFS_PROG_SIZE=64" make -Cfeatures/filesystem/littlefs/littlefs test QUIET=1
+  - CFLAGS="-Wno-format -DLFS_READ_SIZE=1 -DLFS_PROG_SIZE=1" make -Cfeatures/filesystem/littlefs/littlefs test QUIET=1
+  - CFLAGS="-Wno-format -DLFS_READ_SIZE=512 -DLFS_PROG_SIZE=512" make -Cfeatures/filesystem/littlefs/littlefs test QUIET=1
+  - CFLAGS="-Wno-format -DLFS_BLOCK_COUNT=1023" make -Cfeatures/filesystem/littlefs/littlefs test QUIET=1
+  - CFLAGS="-Wno-format -DLFS_LOOKAHEAD=2048" make -Cfeatures/filesystem/littlefs/littlefs test QUIET=1
+  # Self-hosting littlefs fuzz test with littlefs-fuse
+  - make -C littlefs-fuse
+  - littlefs-fuse/lfs --format /dev/loop0
+  - littlefs-fuse/lfs /dev/loop0 MOUNT
+  - ls MOUNT
+  - mkdir MOUNT/littlefs
+  - cp -r $(git ls-tree --name-only HEAD features/filesystem/littlefs/littlefs/) MOUNT/littlefs
+  - ls MOUNT/littlefs
+  - CFLAGS="-Wno-format" make -CMOUNT/littlefs -B test_dirs QUIET=1
+
 after_success:
+  # Coverage for tools
   - coveralls
+
 before_install:
+  # Setup ppa to make sure arm-none-eabi-gcc is correct version
   - sudo add-apt-repository -y ppa:team-gcc-arm-embedded/ppa
   - sudo add-apt-repository -y ppa:libreoffice/libreoffice-4-2
   - sudo apt-get update -qq
-  - sudo apt-get install -qq gcc-arm-embedded doxygen --force-yes
+
-  # Print versions we use
-  - arm-none-eabi-gcc --version
-  - python --version
-  - doxygen --version
 install:
+  # Install dependencies
+  - sudo apt-get install -qq gcc-arm-embedded doxygen libfuse-dev
   - pip install --user -r requirements.txt
   - pip install --user pytest
   - pip install --user pylint
@@ -42,3 +64,25 @@ install:
   - pip install --user mock
   - pip install --user coverage
   - pip install --user coveralls
+  # Print versions we use
+  - arm-none-eabi-gcc --version
+  - python --version
+  - doxygen --version
+  - gcc --version
+  - fusermount --version
+
+before_script:
+  # Create BUILD directory for tests
+  - mkdir BUILD
+  # Make sure pipefail
+  - set -o pipefail
+  # Setup and patch littlefs-fuse
+  - git clone https://github.com/geky/littlefs-fuse
+  - echo '*' > littlefs-fuse/.mbedignore
+  - rm -rf littlefs-fuse/littlefs/*
+  - cp -r $(git ls-tree --name-only HEAD features/filesystem/littlefs/littlefs/) littlefs-fuse/littlefs
+  # Create file-backed disk
+  - mkdir MOUNT
+  - sudo chmod a+rw /dev/loop0
+  - dd if=/dev/zero bs=512 count=2048 of=DISK
+  - losetup /dev/loop0 DISK