[BUG] unable to resolve dependency tree

[Janpot]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

"unable to resolve dependency tree" errors when trying to install a dependency, even though the semver range is satisfied.

Expected Behavior

Dependencies can be installed without any error

Steps To Reproduce

1. go to an empty folder
2. run npm init --yes && npm add next next-rpc
3. observe error

npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR! 
npm ERR! While resolving: [email protected]
npm ERR! Found: next@undefined
npm ERR! node_modules/next
npm ERR!   next@"*" from the root project
npm ERR! 
npm ERR! Could not resolve dependency:
npm ERR! peer next@">10" from [email protected]
npm ERR! node_modules/next-rpc
npm ERR!   next-rpc@"*" from the root project
npm ERR! 
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.
npm ERR! 
npm ERR! See /Users/me/.npm/eresolve-report.txt for a full report.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/me/.npm/_logs/2021-05-26T13_42_24_577Z-debug.log

This works with npm@6.

There's also this strange line

npm ERR! Found: next@undefined

Running the install commands separately

npm add next
npm add next-rpc

gives:

npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR! 
npm ERR! While resolving: [email protected]
npm ERR! Found: [email protected]
npm ERR! node_modules/next
npm ERR!   next@"^10.2.3" from the root project
npm ERR! 
npm ERR! Could not resolve dependency:
npm ERR! peer next@">10" from [email protected]
npm ERR! node_modules/next-rpc
npm ERR!   next-rpc@"*" from the root project
npm ERR! 
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.
npm ERR! 
npm ERR! See /Users/me/.npm/eresolve-report.txt for a full report.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/me/.npm/_logs/2021-05-26T13_49_45_158Z-debug.log

10.2.3 is supposed to satisfy >10, right?

Environment

• OS: MacOs
• Node: 16.2.0
• npm: 7.13.0

[ljharb]

What is npm add?

[Janpot]

@ljharb

npm install (with no args, in package dir)
npm install [<@scope>/]<pkg>
npm install [<@scope>/]<pkg>@<tag>
npm install [<@scope>/]<pkg>@<version>
npm install [<@scope>/]<pkg>@<version range>
npm install <alias>@npm:<name>
npm install <folder>
npm install <tarball file>
npm install <tarball url>
npm install <git:// url>
npm install <github username>/<github project>

aliases: i, isntall, add
common options: [--save-prod|--save-dev|--save-optional] [--save-exact] [--no-save]

Seems to be an alias of npm install, just like npm i and npm isntall. Not sure why I used that, must be the influence of yarn 🙂

[ljharb]

oof, ok.

Either way, “> 10” excludes v10. So that requirement means you need v11+.

[Janpot]

Ok, makes sense, thanks. Will change to >=10