Installation fails on macOS Sierra

npm install smartcrop-cli --save-dev
/project/node_modules/opencv/utils/find-opencv.js:21
                throw new Error("ERROR: failed to run: pkg-config", opencv, flag);
                ^

Error: ERROR: failed to run: pkg-config
    at /project/node_modules/opencv/utils/find-opencv.js:21:23
    at ChildProcess.exithandler (child_process.js:213:5)
    at emitTwo (events.js:106:13)
    at ChildProcess.emit (events.js:191:7)
    at maybeClose (internal/child_process.js:877:16)
    at Socket.<anonymous> (internal/child_process.js:334:11)
    at emitOne (events.js:96:13)
    at Socket.emit (events.js:188:7)
    at Pipe._handle.close [as _onclose] (net.js:493:12)
gyp: Call to 'node utils/find-opencv.js --cflags' returned exit status 1 while in binding.gyp. while trying to load binding.gyp
Failed to execute 'node-gyp configure --fallback-to-build --module=/project/node_modules/opencv/build/opencv/v5.0.0/Release/node-v48-darwin-x64/opencv.node --module_name=opencv --module_path=/project/node_modules/opencv/build/opencv/v5.0.0/Release/node-v48-darwin-x64 --python=python2.7' (1)
/project
└── smartcrop-cli@1.0.2

I just installed OpenCV3 using:

$ brew tap homebrew/science && brew install --HEAD opencv3

At a minimum, it might be cool to have a note in README about how to get opencv installed and that it is a hard dependency (as this CLI would not install without opencv … though, I obviously can’t install with it either!).

Thanks for listening!

[rmammina]

Running

brew install homebrew/science/opencv

worked for me.

[mhulse]

brew install homebrew/science/opencv

I need to try that again actually. I recently followed this:

http://www.pyimagesearch.com/2016/12/19/install-opencv-3-on-macos-with-homebrew-the-easy-way/

But realized opencv3 is not exactly opencv

Looking like this is just boiling down to user inexperience. 😆

Closing, and thanks for the help @rmammina and all.