npm install fails

[jonathan-benn]

Hi,

Recently, when trying to install hello-lights on a brand new laptop, I encountered the following errors:

C:\Users\MTL2_ADMIN\Desktop\laptop-traffic-light>npm install hello-lights

usb-detection@4.3.0 install C:\Users\MTL2_ADMIN\Desktop\laptop-traffic-light\node_modules\usb-detection
prebuild-install || node-gyp rebuild

prebuild-install WARN install No prebuilt binaries found (target=10.16.0 runtime=node arch=x64 libc= platform=win32)

C:\Users\MTL2_ADMIN\Desktop\laptop-traffic-light\node_modules\usb-detection>if not defined npm_config_node_gyp (node "C:\Program Files\nodejs\node_modules\npm\node_modules\npm-lifecycle\node-gyp-bin\....\node_modules\node-gyp\bin\node-gyp.js" rebuild ) else (node "C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\bin\node-gyp.js" rebuild )
gyp ERR! configure error
gyp ERR! stack Error: Can't find Python executable "python", you can set the PYTHON env variable.
gyp ERR! stack at PythonFinder.failNoPython (C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\lib\configure.js:484:19)
gyp ERR! stack at PythonFinder. (C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\lib\configure.js:509:16)
gyp ERR! stack at C:\Program Files\nodejs\node_modules\npm\node_modules\graceful-fs\polyfills.js:282:31
gyp ERR! stack at FSReqWrap.oncomplete (fs.js:153:21)
gyp ERR! System Windows_NT 10.0.17763
gyp ERR! command "C:\Program Files\nodejs\node.exe" "C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\bin\node-gyp.js" "rebuild"
gyp ERR! cwd C:\Users\MTL2_ADMIN\Desktop\laptop-traffic-light\node_modules\usb-detection
gyp ERR! node -v v10.16.0
gyp ERR! node-gyp -v v3.8.0
gyp ERR! not ok
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! usb-detection@4.3.0 install: prebuild-install || node-gyp rebuild
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the usb-detection@4.3.0 install script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\MTL2_ADMIN\AppData\Roaming\npm-cache_logs\2019-07-19T20_17_50_317Z-debug.log

[jordao76]

For the time being, you should build usb-detection locally, by installing the npm build tools. I think the node installer also has an option to install them. I had already reported this here: MadLittleMods/node-usb-detection#85

[jordao76]

You can now use npm install hello-lights --no-optional, and usb-detection will not be installed.

[jonathan-benn]

Thanks! The package management is a bit awkward (in package.json I need to add a new line to scripts... "preinstall": "npm install hello-lights@^0.1.8 --no-optional"). However, it works! 👍