Today when downloading wepy-cli an error was reported

sudo npm i wepy-cli -g

gyp ERR! configure error
gyp ERR! stack Error: EACCES: permission denied, mkdir '/usr/local/lib/node_modules/wepy-cli/node_modules/fsevents/.node-gyp'
gyp ERR! System Darwin 19.2.0
gyp ERR! command "/usr/local/bin/node" "/usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "configure" "--fallback-to-build" "--module=/usr/local/lib/node_modules/wepy-cli/node_modules/fsevents/lib/binding/Release/node-v72-darwin-x64/fse.node" "--module_name=fse" "--module_path=/usr/local/lib/node_modules/wepy-cli/node_modules/fsevents/lib/binding/Release/node-v72-darwin-x64" "--napi_version=5" "--node_abi_napi=napi" "--napi_build_version=0" "--node_napi_label=node-v72"
gyp ERR! cwd /usr/local/lib/node_modules/wepy-cli/node_modules/fsevents
gyp ERR! node -v v12.13.1
gyp ERR! node-gyp -v v5.0.5
gyp ERR! not ok
node-pre-gyp ERR! build error
node-pre-gyp ERR! stack Error: Failed to execute '/usr/local/bin/node /usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js configure --fallback-to-build --module=/usr/local/lib/node_modules/wepy-cli/node_modules/fsevents/lib/binding/Release/node-v72-darwin-x64/fse.node --module_name=fse --module_path=/usr/local/lib/node_modules/wepy-cli/node_modules/fsevents/lib/binding/Release/node-v72-darwin-x64 --napi_version=5 --node_abi_napi=napi --napi_build_version=0 --node_napi_label=node-v72' (1)
node-pre-gyp ERR! stack     at ChildProcess.<anonymous> (/usr/local/lib/node_modules/wepy-cli/node_modules/fsevents/node_modules/node-pre-gyp/lib/util/compile.js:83:29)
node-pre-gyp ERR! stack     at ChildProcess.emit (events.js:210:5)
node-pre-gyp ERR! stack     at maybeClose (internal/child_process.js:1021:16)

I said I didn’t have permission. Why?I added sudo

After tossing for a long time, I found an order

sudo npm install –unsafe-perm -g wepy-cli

That’s it

Why

A: for security reasons, NPM does not support running as root. Even if you run as root, NPM will automatically turn into a user named nobody, who has almost no permissions. In this way, if your script has some operations that require permissions, such as writing files (especially/root /. Node gyp), it will crash

In order to avoid this situation, either follow the rules of NPM and set up a high authority user for running NPM; Either add the — unsafe perm parameter, so that you will not switch to nobody. The user at runtime is the same user, even root