Is there a way to get chruby to automatically do something when switching?

I have a ruby 1.8 install where I must set RUBYLIB manually before any ruby programs will work ... is it possible to have chruby do this automatically when switching to ruby 1.8? I don't see a way ... it would be nice to be able to take arbitrary actions when switching rubies ...

[postmodern]

You would have to write your own post-switching commands system.

[bronson]

Or use one of the zillions that already exist... Here are some notes from a year ago when I needed to solve this. (I ended up writing a one-off script, eschew overengineering)

• autoenv: Overrides cd, that won't go well.
• direnv: Well that's an awful lot of Go code.
• anyenv: No README, looks kinda loose on security.
• dotenv: Ruby/Rails-specific, requires changing your source code.
• chenv: A lot of code plus a git-style UI.
  It's a popular name: chenv, chenv, etc.
• aam: Apparently it's now named tem.
• tem: Must be solving a completely different problem?

[postmodern]

@bronson right, the real problem is Bash doesn't support something like preexec_functions. You have to either inject a command into PROMPT_COMMAND (only works in interactive mode) or use trap DEBUG (not inherited by sub-processes). So most of these Bash solutions clobber any previously inserted Bash "hooks".

[ilikepi]

Would the idea proposed in #227 make this easier?

[postmodern]

@ilikepi providing a function would allow users to manually set the trap DEBUG command. Manually injection into trap DEBUG is still impossibly/difficult unless set -T is set.

[ilikepi]

Right... so does that mean you agree with this proposal (in a general sense)? I'm happy to put together a PR for further discussion.

On Jan 5, 2016, at 20:33, Postmodern notifications@github.com wrote:

@ilikepi providing a function would allow users to manually set the trap DEBUG command. Manually injection into trap DEBUG is still impossibly/difficult unless set -T is set.

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[bitboxer]

rbenv has plugins that enable you to do things when switching versions and other things. Would love to see that in chruby, too.