Fsevents: [Mac OS, GitHub Actions] Error: Cannot find module 'nan'

[evandrocoan]

I have a setup which is working fine on Windows but it is not installing on Mac OS (GitHub Actions): https://github.com/evandroforks/anki/runs/607942390?check_suite_focus=true#step:27:438

> [email protected] install /Users/runner/runners/2.169.0/work/anki/anki/qt/ts/node_modules/@types/gulp/node_modules/fsevents
> node-gyp rebuild

internal/modules/cjs/loader.js:983
  throw err;
  ^

Error: Cannot find module 'nan'
Require stack:
- /Users/runner/runners/2.169.0/work/anki/anki/qt/ts/node_modules/@types/gulp/node_modules/fsevents/[eval]
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:980:15)
    at Function.Module._load (internal/modules/cjs/loader.js:862:27)
    at Module.require (internal/modules/cjs/loader.js:1042:19)
    at require (internal/modules/cjs/helpers.js:77:18)
    at [eval]:1:1
    at Script.runInThisContext (vm.js:120:20)
    at Object.runInThisContext (vm.js:311:38)
    at Object.<anonymous> ([eval]-wrapper:10:26)
    at Module._compile (internal/modules/cjs/loader.js:1156:30)
    at evalScript (internal/process/execution.js:94:25) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [
    '/Users/runner/runners/2.169.0/work/anki/anki/qt/ts/node_modules/@types/gulp/node_modules/fsevents/[eval]'
  ]
}
gyp: Call to 'node -e "require('nan')"' returned exit status 1 while in binding.gyp. while trying to load binding.gyp
gyp ERR! configure error 
gyp ERR! stack Error: `gyp` failed with exit code: 1
gyp ERR! stack     at ChildProcess.onCpExit (/Users/runner/hostedtoolcache/node/12.16.2/x64/lib/node_modules/npm/node_modules/node-gyp/lib/configure.js:351:16)
gyp ERR! stack     at ChildProcess.emit (events.js:310:20)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:275:12)
gyp ERR! System Darwin 19.4.0
gyp ERR! command "/Users/runner/hostedtoolcache/node/12.16.2/x64/bin/node" "/Users/runner/hostedtoolcache/node/12.16.2/x64/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /Users/runner/runners/2.169.0/work/anki/anki/qt/ts/node_modules/@types/gulp/node_modules/fsevents
gyp ERR! node -v v12.16.2
gyp ERR! node-gyp -v v5.1.0
gyp ERR! not ok 

> [email protected] install /Users/runner/runners/2.169.0/work/anki/anki/qt/ts/node_modules/glob-watcher/node_modules/fsevents
> node-gyp rebuild

internal/modules/cjs/loader.js:983
  throw err;
  ^

Error: Cannot find module 'nan'
Require stack:
- /Users/runner/runners/2.169.0/work/anki/anki/qt/ts/node_modules/glob-watcher/node_modules/fsevents/[eval]
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:980:15)
    at Function.Module._load (internal/modules/cjs/loader.js:862:27)
    at Module.require (internal/modules/cjs/loader.js:1042:19)
    at require (internal/modules/cjs/helpers.js:77:18)
    at [eval]:1:1
    at Script.runInThisContext (vm.js:120:20)
    at Object.runInThisContext (vm.js:311:38)
    at Object.<anonymous> ([eval]-wrapper:10:26)
    at Module._compile (internal/modules/cjs/loader.js:1156:30)
    at evalScript (internal/process/execution.js:94:25) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [
    '/Users/runner/runners/2.169.0/work/anki/anki/qt/ts/node_modules/glob-watcher/node_modules/fsevents/[eval]'
  ]
}
gyp: Call to 'node -e "require('nan')"' returned exit status 1 while in binding.gyp. while trying to load binding.gyp
gyp ERR! configure error 
gyp ERR! stack Error: `gyp` failed with exit code: 1
gyp ERR! stack     at ChildProcess.onCpExit (/Users/runner/hostedtoolcache/node/12.16.2/x64/lib/node_modules/npm/node_modules/node-gyp/lib/configure.js:351:16)
gyp ERR! stack     at ChildProcess.emit (events.js:310:20)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:275:12)
gyp ERR! System Darwin 19.4.0
gyp ERR! command "/Users/runner/hostedtoolcache/node/12.16.2/x64/bin/node" "/Users/runner/hostedtoolcache/node/12.16.2/x64/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /Users/runner/runners/2.169.0/work/anki/anki/qt/ts/node_modules/glob-watcher/node_modules/fsevents
gyp ERR! node -v v12.16.2
gyp ERR! node-gyp -v v5.1.0
gyp ERR! not ok 
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: [email protected] (node_modules/@types/gulp/node_modules/fsevents):
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: [email protected] install: `node-gyp rebuild`
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: Exit status 1
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: [email protected] (node_modules/glob-watcher/node_modules/fsevents):
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: [email protected] install: `node-gyp rebuild`
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: Exit status 1

added 423 packages from 327 contributors and audited 258938 packages in 13.602s

[paulmillr]

Please ask gulp-watcher maintainers to upgrade: https://github.com/gulpjs/glob-watcher/pull/42

[evandrocoan]

What do they need to update? Can I update it on my package.json while they do not fix it?

[paulmillr]

Because the error is related to unsupported fsevents version. We only support fsevents v2.

You could pin your fsevents to v2, but i'm not sure if that'll work.

[evandrocoan]

I fixed it by adding npm install --no-optional

1. https://stackoverflow.com/questions/42396791/force-npm-install-to-install-optional-dependencies-for-other-platforms
2. https://stackoverflow.com/questions/33542712/npm-never-install-nested-optional-dependencies-for-npm-package
3. https://stackoverflow.com/questions/51487236/how-do-i-ignore-nested-npm-dependency
4. https://github.com/npm/npm/issues/17633 - npm install --no-optional installs optional dependencies anyway