Trying to create an npm version requirement of ^16.0.0-0 results in a NullPointerException i.e.
Requirement.buildNPM("^16.0.0-0");
gives
java.lang.NullPointerException: null
at com.vdurmont.semver4j.Semver.<init>(Semver.java:26)
at com.vdurmont.semver4j.Requirement.hyphenRequirement(Requirement.java:487)
at com.vdurmont.semver4j.Requirement.evaluateReversePolishNotation(Requirement.java:338)
at com.vdurmont.semver4j.Requirement.buildWithTokenizer(Requirement.java:138)
at com.vdurmont.semver4j.Requirement.buildNPM(Requirement.java:112)
Whereas this requirement is parseable by node-semver (which is what npm uses) https://github.com/npm/node-semver i.e.
npm install -g semver
...
// In Node.js console
const semver = require('semver')
undefined
semver.satisfies('16.14.0', '^16.0.0-0')
true
This requirement can arise from e.g. trying to install enzyme-adapter-react-16 using npm 6.14.13
npm install [email protected]
Then in the package-lock.json you'll see
"enzyme-adapter-react-16": {
"version": "1.15.6",
...
"requires": {
...
"react-test-renderer": "^16.0.0-0",
}
}
Trying to create an npm version requirement of
^16.0.0-0results in aNullPointerExceptioni.e.Requirement.buildNPM("^16.0.0-0");gives
Whereas this requirement is parseable by
node-semver(which is what npm uses) https://github.com/npm/node-semver i.e.This requirement can arise from e.g. trying to install
enzyme-adapter-react-16using npm6.14.13npm install [email protected]Then in the
package-lock.jsonyou'll see