8.5 Packages

[268] package prefer, various extensions

Support alpha & beta versions.

1.0a5 < 1.0b0 < 1.0, 2b3.4.2 but not 1a1b2, …

Allow multiple requirements (or-junction):

package vsatisfies v req1 ?req2 …?

package require ?-exact? name req1 ?req2 …?

Requirement syntax: min, min-, min-max

Search preferences:

package prefer stable|latest

Stable uses alpha/beta version only if no other choice available.