fsevents_watcher

A python extension to gather filesystem events generated by the operating system (macOS) for a specific path. Have a look at macos_watcher.py for an example.

requirements

homebrew (used to pull other requirements)
xcode devutils
golang (used to compile the go code)
pkg-config (used to generate the header files)

bootstrap

xcode-select --install  # installs xcode devutils
# make sure you have set your GOPATH
brew install pkg-config golang
mkdir -p $GOPATH/src/github.com/nilleb
cd $GOPATH/src/github.com/nilleb
git clone https://github.com/nilleb/fsevents-watcher
cd fsevents-watcher
# which python do you use? we try to detect it in the set-python-home.sh.
# if you feel it's not the right version, feel free to edit it.
./build.sh

# now you can:
# - launch the example by typing
./launch.sh
# - if you want to use the included mtime_file_watcher.py for your AppEngine dev_appserver.py
sudo python replace_mtime_file_watcher.py replace
# now you can start `dev_appserver.py` as usual
# - if you want to restore the original mtime_file_watcher.py,
sudo python replace_mtime_file_watcher.py restore

notes

has been tested on

Darwin 17.4.0 Darwin Kernel Version 17.4.0: Sun Dec 17 09:19:54 PST 2017; root:xnu-4570.41.2~1/RELEASE_X86_64 x86_64 i386 MacBookPro12,1 Darwin (homebrew python 2.7.13)
Darwin 17.4.0 Darwin Kernel Version 17.4.0: Sun Dec 17 09:19:54 PST 2017; root:xnu-4570.41.2~1/RELEASE_X86_64 x86_64 i386 MacBookPro13,1 Darwin (System Default Python Interpreter - 2.7.10 as of writing)
Darwin 16.7.0 Darwin Kernel Version 16.7.0: Thu Jan 11 22:59:40 PST 2018; root:xnu-3789.73.8~1/RELEASE_X86_64 x86_64 i386 MacBookPro12,1 Darwin

troubleshooting

python version mismatch

Fatal Python error: PyThreadState_Get: no current thread
./launch.sh: line 4: 52141 Abort trap: 6           $PYTHON_HOME/bin/python macos_watcher.py

Execute a otool -L fsevents_watcher.so and verify that the python path is the one of the python executable you are using to launch the code.

permission denied while replacing the mtime file watcher

IOError: [Errno 13] Permission denied: '/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/mtime_file_watcher.py' Have you typed sudo before the replace_mtime_file_watcher.py invocation?

gcloud components update

If you update the gcloud components, you shall re-replace the mtime_file_watcher.py again..

OCJvanDijk/fsevents-watcher