# One-Click Ruby Installer can run in upgrade mode?
**URL:** https://rubytalk.org/t/one-click-ruby-installer-can-run-in-upgrade-mode/28617
**Category:** ruby-talk
**Created:** [3 July 2006 18:08 UTC](https://rubytalk.org/t/one-click-ruby-installer-can-run-in-upgrade-mode/28617 "2006-07-03T18:08:29Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Alexandru\_Popescu](https://rubytalk.org/u/Alexandru_Popescu)
#### Post date: [3 July 2006 18:08 UTC](https://rubytalk.org/t/one-click-ruby-installer-can-run-in-upgrade-mode/28617/1 "2006-07-03T18:08:29Z")
Hi!
I have a couple of gems installed by the InstantRails installer (and
hacked according to
[http://themindstorms.blogspot.com/2006/06/instantrails-using-existing.html](http://themindstorms.blogspot.com/2006/06/instantrails-using-existing.html)).
I am wondering if now that the RC3 is out (and I would definitely like
to upgrade), than what are the steps that I must perform. I see 2
possible options:
1/ the clean scenario
- uninstall previous version
- install new one
- install old gems (if I can remember which one; is there a away to
know which gems are installed on my system?)
2/ upgrade scenario
- install the new one-click ruby installer over the old one
I guess the first scenario is the recommended one, but than is there a
way to have a list of the gems I have installed so that I can install
them back?
TIA,
./alex
> **···**
>
> --
> .w( the\_mindstorm )p.
> ---
> ([http://themindstorms.blogspot.com](http://themindstorms.blogspot.com))
---
### Author:  [@Curt\_Work\_Hibbs1](https://rubytalk.org/u/Curt_Work_Hibbs1)
#### Post date: [3 July 2006 18:44 UTC](https://rubytalk.org/t/one-click-ruby-installer-can-run-in-upgrade-mode/28617/2 "2006-07-03T18:44:35Z")
Unfortunately, there is only option #1. Option #2 resulting in broken
systems to the installer checks for this and explicitly does not allow it.
To find out what RubyGems you have installed, open a command window and run
the command:
\*gem list\*
Curt
Curt
> **···**
>
> On 7/3/06, Alexandru Popescu \ wrote:
>
> > Hi!
> >
> > I have a couple of gems installed by the InstantRails installer (and
> > hacked according to
> > [mindstorms: InstantRails using existing installations (tips and tricks)](http://themindstorms.blogspot.com/2006/06/instantrails-using-existing.html)
> > ).
> > I am wondering if now that the RC3 is out (and I would definitely like
> > to upgrade), than what are the steps that I must perform. I see 2
> > possible options:
> >
> > 1/ the clean scenario
> > - uninstall previous version
> > - install new one
> > - install old gems (if I can remember which one; is there a away to
> > know which gems are installed on my system?)
> >
> > 2/ upgrade scenario
> > - install the new one-click ruby installer over the old one
> >
> > I guess the first scenario is the recommended one, but than is there a
> > way to have a list of the gems I have installed so that I can install
> > them back?
---
### Author:  [@James\_Britt3](https://rubytalk.org/u/James_Britt3)
#### Post date: [3 July 2006 18:46 UTC](https://rubytalk.org/t/one-click-ruby-installer-can-run-in-upgrade-mode/28617/3 "2006-07-03T18:46:02Z")
Alexandru Popescu wrote:
> Hi!
>
> I have a couple of gems installed by the InstantRails installer (and
> hacked according to
> [http://themindstorms.blogspot.com/2006/06/instantrails-using-existing.html\](http://themindstorms.blogspot.com/2006/06/instantrails-using-existing.html%5C)).
>
> I am wondering if now that the RC3 is out (and I would definitely like
> to upgrade), than what are the steps that I must perform. I see 2
> possible options:
>
> 1/ the clean scenario
> - uninstall previous version
> - install new one
> - install old gems (if I can remember which one; is there a away to
> know which gems are installed on my system?)
You will also have to look after any additional libraries not installed via rubygems (such as with install.rb)
> 2/ upgrade scenario
> - install the new one-click ruby installer over the old one
>
> I guess the first scenario is the recommended one, but than is there a
> way to have a list of the gems I have installed so that I can install
> them back?
gem list
> **···**
>
> --
> James Britt
>
> "In physics the truth is rarely perfectly clear, and that is certainly
> universally the case in human affairs. Hence, what is not surrounded by
> uncertainty cannot be the truth."
> - R. Feynman
---
### Author:  [@Alexandru\_Popescu](https://rubytalk.org/u/Alexandru_Popescu)
#### Post date: [3 July 2006 18:59 UTC](https://rubytalk.org/t/one-click-ruby-installer-can-run-in-upgrade-mode/28617/4 "2006-07-03T18:59:15Z")
Thanks a lot to both answers.
./alex
> **···**
>
> --
> .w( the\_mindstorm )p.
> ---
> ([http://themindstorms.blogspot.com](http://themindstorms.blogspot.com))
>
> On 7/3/06, James Britt \ wrote:
>
> > Alexandru Popescu wrote:
> > \> Hi!
> > \>
> > \> I have a couple of gems installed by the InstantRails installer (and
> > \> hacked according to
> > \> [http://themindstorms.blogspot.com/2006/06/instantrails-using-existing.html\](http://themindstorms.blogspot.com/2006/06/instantrails-using-existing.html%5C)).
> > \>
> > \> I am wondering if now that the RC3 is out (and I would definitely like
> > \> to upgrade), than what are the steps that I must perform. I see 2
> > \> possible options:
> > \>
> > \> 1/ the clean scenario
> > \> - uninstall previous version
> > \> - install new one
> > \> - install old gems (if I can remember which one; is there a away to
> > \> know which gems are installed on my system?)
> >
> > You will also have to look after any additional libraries not installed
> > via rubygems (such as with install.rb)
> >
> > \>
> > \> 2/ upgrade scenario
> > \> - install the new one-click ruby installer over the old one
> > \>
> > \> I guess the first scenario is the recommended one, but than is there a
> > \> way to have a list of the gems I have installed so that I can install
> > \> them back?
> > \>
> >
> > gem list
> >
> > --
> > James Britt
> >
> > "In physics the truth is rarely perfectly clear, and that is certainly
> > universally the case in human affairs. Hence, what is not surrounded by
> > uncertainty cannot be the truth."
> > - R. Feynman