List gem updates without installing?

Ruby
#1

Is there a way to list, but not install, updated gems? I know that ‘gem
update’ will automatically update any gems to newer versions, but I’d
like to see what it’s planning to do before actually doing the updates.

Thanks!

-Mason

#2

Andrew H. wrote:

Mason B. wrote:

Is there a way to list, but not install, updated gems?

All I could think of was querying the local gems, querying the remote
gems, then comparing the version numbers on the remote gems also in the
local repository. I’ve thrown a Ruby script together to do it, though it
lacks any elegance and has only had minimal testing:

More generally, is there a nice way to add customized behavior to one’s
install of rubygems? Basically, plugins, such as could add to or alter
the default behavior?

I’ve poked around a bit, but not settled on a pleasing solution.

–
James B.

“Take eloquence and wring its neck.”

  • Paul Verlaine
#3

Andrew H. wrote:

Mason B. wrote:

Is there a way to list, but not install, updated gems?

All I could think of was querying the local gems, querying the remote
gems, then comparing the version numbers on the remote gems also in the
local repository. I’ve thrown a Ruby script together to do it, though it
lacks any elegance and has only had minimal testing:

http://pond.org.uk/misc/gem-would-update.rb

Is there a better way?

That’s exactly the type of thing I was looking for. Thanks for the
quick and awesome response.

Maybe the gem project would consider including this kind of
functionality as a future feature? They obviously already maintain
local and remote versions and compare them to determine if they need to
be upgraded.

Again, thanks!

-Mason

#4

Mason B. wrote:

Is there a way to list, but not install, updated gems?

All I could think of was querying the local gems, querying the remote
gems, then comparing the version numbers on the remote gems also in the
local repository. I’ve thrown a Ruby script together to do it, though it
lacks any elegance and has only had minimal testing:

http://pond.org.uk/misc/gem-would-update.rb

Is there a better way?

#5

What about using “gem update”, it updates all the installed gems … at
least for me it does.

#6

What about using “gem update”, it updates all the installed gems … at
least for me it does.

#7

bbiker wrote:

What about using “gem update”, it updates all the installed gems … at
least for me it does.

Yes, but the OP wanted to see what gem would update, without actually
doing the update. It’s a cautious (and IMHO wise) approach to upgrading
software rather than just updating and hoping nothing breaks.