weechat-irc-gitter-im.md

Start weechat if you haven't already:

$ weechat

open up browser and go to: https://irc.gitter.im/ retrieve your /PASS

In weecaht run (thanks to raine):

/server add gitter irc.gitter.im -ssl -ssl_verify -ssl_dhkey_size=1024 -password=GET_THIS_FROM_IRC_GITTER_IM

If you receive an error about certifications like this:

               │15:56:35   gitter  -- | irc: connecting to server irc.gitter.im/6667 (SSL)...
               │15:56:35   gitter  -- | gnutls: connected using 1024-bit Diffie-Hellman shared secret exchange
               │15:56:35   gitter  -- | gnutls: receiving 2 certificates
               │15:56:35   gitter  -- |  - certificate[1] info:
               │15:56:35   gitter  -- |    - subject `OU=Domain Control Validated,OU=Gandi Standard Wildcard SSL,CN=*.gitter.im', issuer `C=FR,O=GANDI SAS,CN=Gandi Standard SSL CA',
               │                      | RSA key 2048 bits, signed using RSA-SHA1, activated `2014-10-27 00:00:00 UTC', expires `2015-11-20 23:59:59 UTC', SHA-1 fingerprint
               │                      | `0f519b2d14ede0a82689ef42e328403fda5052a2'
               │15:56:35   gitter  -- |  - certificate[2] info:
               │15:56:35   gitter  -- |    - subject `C=FR,O=GANDI SAS,CN=Gandi Standard SSL CA', issuer `C=US,ST=UT,L=Salt Lake City,O=The USERTRUST
               │                      | Network,OU=http://www.usertrust.com,CN=UTN-USERFirst-Hardware', RSA key 2048 bits, signed using RSA-SHA1, activated `2008-10-23 00:00:00
               │                      | UTC', expires `2020-05-30 10:48:38 UTC', SHA-1 fingerprint `a9f79883a075ce82d20d274d1368e876140d33b3'
               │15:56:35   gitter =!= | gnutls: peer's certificate is NOT trusted
               │15:56:35   gitter =!= | gnutls: peer's certificate issuer is unknown
               │15:56:35   gitter =!= | irc: TLS handshake failed
               │15:56:35   gitter =!= | irc: error: Error in the certificate.

Take the last SHA-1 fingerprint received (in my case it's 0f519b2d14ede0a82689ef42e328403fda5052a2 - yours will be different).

Then in weechat run:

/set irc.server.gitter.ssl_fingerprint YOUR_FINGER_PRINT

This will hopefully give you:

                   │09:56:13   gitter  -- | - Message of the Day -
                   │09:56:13   gitter  -- | Welcome to Gitter
                   │09:56:13   gitter  -- | (null)
                   │09:56:13   gitter  -- | Please provide your password token using /PASS <token> and your GitHub username as your /NICK.
                   │09:56:13   gitter  -- | (null)
                   │09:56:13   gitter  -- | If you don't have a password token, please visit https://irc.gitter.im.
                   │09:56:13   gitter  -- | (null)
                   │09:56:13   gitter  -- | To join room, simply type /JOIN #owner/repo or /JOIN #orgname.
                   │09:56:13   gitter  -- | (null)
                   │09:56:13   gitter  -- | This service is still very much in Beta. To report any issues, please visit http://support.gitter.im.
                   │09:56:13   gitter  -- | (null)
                   │09:56:13   gitter  -- | Be nice, have fun
                   |
                   

From there you should be good to go - enter in the /NICK & /PASS info from irc.gitter.im

@sudoforge a gitter plugin for weechat could potentatially have a lot of features, such as, seeing own messages from other clients, and nick completion. wee-slack even shows when other people are typing.

For the record, a lot of problems with failure to verify the ssl connection are solved in weechat by ensuring the ca certificates are configured correctly:

https://weechat.org/files/doc/devel/weechat_faq.en.html#irc_ssl_freenode