[BUG] When called with a --package foo@version, npx doesn't cache it

[kenotron]

What / Why

When npx is invoked with --package foo@1.2.3, npx doesn't cache it (maybe there is a good reason for this, but I can't think of one)

When

When npx is invoked with --package foo@1.2.3

Where

any package

Current Behavior

foo@1.2.3 is not cached

Steps to Reproduce

simply run npx with --package with a @ version - do this more than once

Expected Behavior

You should see the 2nd time that npx does not try to install packages again (caching the first install)

References

Look here:

• https://github.com/npm/npx/blob/latest/index.js#L172
• also semantic of the conditonal had changed when comparing the yargs-parser vs the fastPathArgs:
  • https://github.com/npm/npx/blob/latest/parse-args.js#L58
  • https://github.com/npm/npx/blob/latest/parse-args.js#L117

[stalniy]

+1 for this feature! I can even look into fixing it if somebody from npm team approves this