This testcase replicates an error of:
npm ERR! missing: [email protected], required by [email protected]
That happens with node v6.10.3 and npm v3.10.10 when npm ls is run after install of the module. What appears to be happening is that:
- The module depends on
minimist@~1.2.0 - The module depends on
node-pre-gypwhich depends onmkdirp@^0.5.1 [email protected]is pinned exactly to[email protected]: https://github.com/substack/node-mkdirp/blob/f2003bbcffa80f8c9744579fabab1212fc84545a/package.json#L19- During npm install the
mkdirpis installed in the node-pre-gyp modules folder - With node v0.10, v4, and v7 the
[email protected]is installed at the top level and[email protected]is installed within themkdirpdependended upon mynode-pre-gyp. - With node v6 the
[email protected]is installed at the top level and[email protected]is NOT installed within themkdirpdependended upon mynode-pre-gyp. - During npm install
node-pre-gypis run and themkdirpappears to work at runtime with all versions of node despite the deduping problem with node v6 - Npm runs
prepublishduring install - context at https://github.com/npm/npm/blob/latest/CHANGELOG.md#new-prepare-script-prepublish-deprecated-breaking - With node v6 the
npm lsthat is run duringprepublish(which is automatically run by npm at the end of the install) errors since the pinnned[email protected]is missing.
The tree that npm ls is outputs (when it returns an error with node v6) is:
└─┬ [email protected]
├���┬ [email protected]
│ └── UNMET DEPENDENCY [email protected]
This does not happen with node v7 and npm v4.2.0