From: "Shot (Piotr Szotkowski)" <shot@...>
Date: 2009-12-13T11:21:20+09:00
Subject: Re: Is it possible to force a Ruby program to run as a proc name	different than "ruby"?

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I=C3=B1aki Baz Castillo:

> I suffer same issues. I've installed ruby 1.9.1 (installed from
> sources) under /usr/local. and ruby 1.8.7 (Debian package) under /usr.

> I compile ruby1.9 with these options:
>   /configure --prefix=3D/usr/local/ --program-suffix=3D1.9 ; make ; make =
install
> so all its runnable files are sufixed by 1.9 (ruby1.9, gem1.9, irb1.9...).

I think a much simpler solutions are to either (a) use rvm (which
doesn=E2=80=99t work for me for some reason) or (b) use my approach (below).

I don=E2=80=99t use program suffixes, but rather use

=2E/configure --prefix=3D/home/shot/opt/ruby-1.9.1-p376

(and similar, for example ~/opt/ruby-1.8.7-git when building 1.8.7 from
the repo=E2=80=99s latest 1.8.7 revision) plus ~/opt/ruby-1.8 and ~/opt/rub=
y-1.9
symlinks poiting to the hand-compiled versions I want to use for my
development. I then have

export PATH_ORIG=3D"$PATH"

at the end of my ~/.bashrc and

alias r18=3D'export PATH=3D/home/shot/opt/ruby-1.8/bin:$PATH_ORIG'
alias r19=3D'export PATH=3D/home/shot/opt/ruby-1.9/bin:$PATH_ORIG'

in my ~/.bash_aliases, and switching between Ruby 1.8 and 1.9 is as
quick as running =E2=80=98r18=E2=80=99 and =E2=80=98r19=E2=80=99 in the she=
ll. I leave system-packaged
Ruby alone, if only so that =E2=80=98gem update --system=E2=80=99 works san=
ely (and so
no sudo is required for any of my Ruby development whatsoever).

Of course, if you want to have system-wide hand-compiled Ruby 1.8 and/or
1.9, putting them in /opt (rather than ~/opt) might be more elegant.

=E2=80=94 Shot
--=20
We don=E2=80=99t think of ourselves as being perfectionists, really. To us
it=E2=80=99s more about desperately trying to have it sound more or less OK.
                                                      [Donald Fagen]

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