Make sure you have checked all steps below.

Prerequisite

• Please consider implementing the feature as a hook script or plugin as a first step.
  • pyenv has some powerful support for plugins and hook scripts. Please refer to Authoring plugins for details and try to implement it as a plugin if possible.
• Please consider contributing the patch upstream to rbenv, since we have borrowed most of the code from that project.
  • We occasionally import the changes from rbenv. In general, you can expect changes made in rbenv will be imported to pyenv too, eventually.
  • Generally speaking, we prefer not to make changes in the core in order to keep compatibility with rbenv.
• My PR addresses the following pyenv issue (if any)
  • None. A prerequisite to fix pyenv-virtualenv not auto-resolve version pyenv-virtualenv#441

Description

• Here are some details about my PR

A missed bit when implementing autoresolution. The code was using -d versions/${version} instead of delegating to pyenv-prefix.
Also did a cleanup to avoid iterating twice.

Tests

• My PR adds the following unit tests (if any)

• test for resolving a prefix
• test for resolving version name for hooks (conda.bash hook in Pyenv-virtualenv uses this)