Discard all and get clean copy of latest revision

Question

I m moving a build process to use mercurial and want to get the working directory back to the state of the tip revision  Earlier runs of the build process will have modified some files and added some files that I don t want to commit  so I have local changes and files that aren t added to the repository    What s the easiest way to discard all that and get a clean working directory that has the latest revision   Currently I m doing this    hg revert --all  lt build command here to delete the contents of the working directory  except the  hg folder  gt  hg pull hg update -r MY BRANCH   but it seems like there should be a simpler way   I want to do the equivalent of deleting the repo  doing a fresh clone  and an update  But the repo is too big for that to be fast enough

User · Answer

If you re looking for a method that s easy  then you might want to try this   I for myself can hardly remember commandlines for all of my tools  so I tend to do it using the UI     1  First  select  commit     2  Then  display ignored files  If you have uncommitted changes  hide them     3  Now  select all of them and click  Delete Unversioned      Done  It s a procedure that is far easier to remember than commandline stuff

User · Answer

Those steps should be able to be shortened down to   hg pull hg update -r MY BRANCH -C   The -C flag tells the update command to discard all local changes before updating   However  this might still leave untracked files in your repository  It sounds like you want to get rid of those as well  so I would use the purge extension for that   hg pull hg update -r MY BRANCH -C hg purge   In any case  there is no single one command you can ask Mercurial to perform that will do everything you want here  except if you change the process to that  full clone  method that you say you can t do

User · Answer

hg up -C   This will remove all the changes and update to the latest head in the current branch   And you can turn on purge extension to be able to remove all unversioned files too

User · Answer

To delete untracked on  nix without the purge extension you can use hg pull hg update -r MY BRANCH -C hg status -un xargs rm  Which is using  update -r --rev REV    revision update -C --clean      discard uncommitted changes  no backup  status -u --unknown              show only unknown  not tracked  files status -n --no-status            hide status prefix

User · Answer

hg status will show you all the new files  and then you can just rm them   Normally I want to get rid of ignored and unversioned files  so   hg status -iu                            to show  hg status -iun0   xargs -r0 rm           to destroy   And then follow that with   hg update -C -r xxxxx   which puts all the versioned files in the right state for revision xxxx    To follow the Stack Overflow tradition of telling you that you don t want to do this  I often find that this  Nuclear Option  has destroyed stuff I care about    The right way to do it is to have a  make clean  option in your build process  and maybe a  make reallyclean  and  make distclean  too

[mercurial] Discard all and get clean copy of latest revision?

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