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1. .hgrc host fingerprints

   [hostfingerprints]
   my.server.com = 07:a0:bd:32:6e:2f:81:58:92:e9:60:d4:e4:83:7a:48:43:d3:5a:c4
   

2. .hgrc HTTP authentication

   [auth]
   repo.prefix = https://my.repository.com:444/hg/xxx/
   repo.username = nseriot
   repo.password = password
   

3. .hgrc username

   [ui]
   username = Nicolas Seriot <nicolas.seriot@xxx.com>
   

4. Change latest commit message

   like git commit --amend

   $ hg rollback
   $ hg commit -m "new message"
   

5. Compact Mercurial logs

   $ hg log --limit 3 --template '{node|short} | {date|isodatesec} | {author|user}: {desc|strip|firstline}\n'
   
   683a489bf341 | 2012-08-03 13:20:31 +0200 | nicolas: misc
   99de916e21d9 | 2012-08-02 11:10:28 +0200 | nicolas: misc
   a6a45f2e7ff6 | 2012-07-31 16:58:53 +0200 | nicolas: misc
   

   Even better with an alias in .hgrc

   [alias]
   shortlog = log --template '{node|short} | {date|isodatesec} | {author|user}: {desc|strip|firstline}\n'
   

   Now callable with:

   $ hg shortlog
   

6. Diff between tags

   $ hg diff -r tag1:tag2
   

7. Pull from a repository with a self-signed certificate

   $ hg pull --insecure https://server/repository
   

8. Rename a tag

   hg tag -r 1220 new_tag
   hg tag --remove old_tag
   

9. Use FileMerge for diffs

   Create opendiff-w, an executable script in your path, with the following contents:

   # opendiff returns immediately, without waiting for FileMerge to exit.
   # Piping the output makes opendiff wait for FileMerge.
   opendiff "$@" | cat
   

   Set the following in your .hgrc file

   [extensions]
   hgext.extdiff = 
   
   [extdiff]
   cmd.opendiff = opendiff-w
   

   Now you can see the diff in FileMerge by calling:

   $ hg opendiff
   

   http://mercurial.selenic.com/wiki/ExtdiffExtension