What exactly is a Mercurial changeset? - mercurial

If you pull down a changeset are you pulling down the full copy of all files that were changed in the changeset?
Or are you pulling down some type of diff report which Mercurial will then apply to your repo when you do hg update?

You are pulling down a list of changes
for each file.
More details at the site below.
https://www.mercurial-scm.org/wiki/ChangeSet

Related

Why won't my hg work?

I'm trying to do hg pull from another computer but hg is not giving me the latest version. It might be that I'm on the wrong branch. What can I do to resolve the error? When I make hg diff there is no diff but I know that is is not the latest version.
hg diff will never show you any output irrespective of the currently changeset, assuming that you have no uncommitted changes.
hg pull does not update your working dir to any revision - it just pulls the changesets into your mercurial repository without updating your currently checked our revision
You'll need to update your working copy to whatever revision you want. If there is only one branch involved, a simple hg update will do the trick. If there are several branches involved and the new changesets are on another branch, you'll need to tell mercurial explicitly that you're also ok with a branch change during update: hg update --check. Alternatively you can also try hg update --rev tip after the pull. If there's no branch switch involved and necessary, you can also tell pull to update immediately after a successful pull (but it won't switch branches): hg pull --update

replicate Hg repo with all largefiles

We have a large, old repository with largefiles. I want to replicate the repository to a backup server using a cron script that runs hg pull. However, this command doesn't retrieve the largefiles.
I currently have 2GB of history replicated, but I'm missing 6GB of largefiles. How can I get Hg to pull down those important files?
By default, only largefiles for the revision you update to will be downloaded.
'hg help largefiles' says:
When you pull a changeset that affects largefiles from a remote repository,
the largefiles for the changeset will by default not be pulled down. However,
when you update to such a revision, any largefiles needed by that revision are
downloaded and cached (if they have never been downloaded before). One way to
pull largefiles when pulling is thus to use --update, which will update your
working copy to the latest pulled revision (and thereby downloading any new
largefiles).
If you want to pull largefiles you don't need for update yet, then you can use
pull with the "--lfrev" option or the "hg lfpull" command.
You should be able to use 'hg lfpull --rev "all()"' for this purpose.

Mercurial pushing update to previous revision

I ran hg update -r REVISION to revert a branch to a previous revision, but when I try to push this to a remote repository it says "no changes found". How can I accomplish this?
To revert the files to a previous revision you can use
hg revert -r REVISION
This will change your working directory files to what they were at that revison. Then you
will need to commit these changes before pushing.
hg update -r REVISION changes the working directory's parent to be that revision as well as changes the contents of the working directory to that revision. This is not what you want here.
hg update only affects the state of your working directory, not the repository itself. If you want to "undo" the effects of one or more previous revisions, you will need to change the repository by committing a new changeset that reflects those changes. You could do it manually but hg's builtin backout command makes this easy to do. See a brief description here. There is a detailed explanation of backout here.

repo cloned from one remote branch needs to be commited to a different remote branch

We have a master repository located on a separate server. I originally cloned the default branch and made my changes locally. I have locally commited those changes. However, there has been a branch created on the master repository that I would like to push my changes to. Below is the description of my attempt at getting this accomplished.
I have cloned the branch. I am trying to export my changes from local default like so:
C:\hg\default>hg export -g -o mypatch -r tip
and when trying to import them into the clone of the new branch, I get the following:
C:\hg\newBranch>hg import C:\hg\default\mypatch
applying C:\hg\Fill1\mypatch
patching file .hgignore
Hunk #1 FAILED at 11
1 out of 1 hunks FAILED -- saving rejects to file .hgignore.rej
abort: patch failed to apply
I can manually fix the .hgingore.rej file just fine. The problem is that the patch also contains files that were moved. Instead of the files showing as moved, I get the following when running hg status:
C:\hg\newBranch>hg status -C
M someOtherFilesThatLookAsExpected.txt
! originalLocaion\fileA.txt
? newLocation\fileA.txt
This missing and new status is for all files that were moved in the commit contained the applied patch. Am I doing something wrong? Do I always have to manually move files when applying a patch? Is there an easier way to accomplish this branch transfer?
That's a bit difficult to answer without knowing more about your repository structure, but here's how I'd go about it without knowing more. I'm assuming that the reason for the conflict is that there are conflicting changes in the same branch of the repository.
First, get the contents of the newBranch repository:
cd c:\hg\default
hg pull c:\hg\newBranch
Then, either merge or rebase your changes on top. If you are working on the same branch, then just using
hg pull --rebase c:\hg\newBranch
in lieu of the regular pull should do (assuming you have rebasing enabled). Otherwise, do an explicit merge or rebase of the two heads that you need to reconcile. Finally, do:
hg push -r tip c:\hg\newBranch
in order to get your (now reconciled) changes back into newBranch.
Unless you have very specific and unusual requirements, push and pull should be your normal way to sync repositories or part of them (note that using -r will only push/pull the respective branch). Export/import are rather low-level mechanisms that may not give you the benefits of the standard machinery that handles renames, three-way merging logic, etc.

Mercurial: How can I import only some changesets from a repository?

I have a repository, called "my project" based in a framework called "framework". The two of them have each it's repository, unrelated between them, with each branches and tags. I want to receive "framework"'s updates in my repository, but only from "default" branch and not from others. And, of course, I do not want to have "framework"'s tags in my repository, as it is a totally different project.
I have Mercurial HG, and I would like to be able to pull changes from "framework" repository directly from my "Manage repository" page.
Furthermore, I only want to download latest changesets, since I started my project not long ago. And It would be perfect if I could rename the "framework"'s default branch to other name in my repo, e.g. "Framework Changesets".
Note: I do not have write access to the "framework" repository.
I tried to do what mercurial wiki said:
hg pull -f -r default "framework"
It was OK, until I realised I had downloaded all the tags from the "framework" repository, and I had downloaded all the changesets from the remote repository. Furthermore, when in TortoiseHG->Configuration->Synchronization I put the "framework" repository as a remote repository for that project, and pulled from the remote repository, I got all the branches from that repository.
Of course I wasn't able to change default branch name, and updated my default branch, even though I tried to use hg convert --branchmap (but I didn't know how to use it).
Is there any solution to my problem? or even a partial solution?
I think you can address this issue through a combination of these things:
Pulling specific branches
Using the command line: hg pull -r <branch name>
Using TortoiseHg v1.1.X:
Check for incoming changesets by using the button labeled Download and view incoming changesets
Right-click on the tip of the branch you want to pull and select Pull to here
Reject the rest of the changesets using the Reject button
Removing existing tags
You can always hand-edit the .hgtags file to remove tags created on the "framework" branch, but I don't know of a way to pull changesets without the tags.
Changing branch name
Using the mq extension you can change the named branch that your new "framework" changesets live on. See answer to "Apply patches in branch" for instructions on how to do this in TortoiseHg v1.1.X, as well as the CLI. The basic idea here is to create a named branch with the name you want, import all of the "framework" changesets you pulled into a patch queue, and then apply them to the new named branch. They will shed the branch name from "framework" and use the branch name of the branch you applied them to.
If you are going to pull from "framework" more than once, you would need to use the patch queue to move only the new changesets with each pull. It should be easy to see which changesets you haven't moved yet.
We can specify the branch name by appending branch name with a # symbol in the clone url.
e.g.
hg clone --verbose https://user#cloneurl/my_product#MY_BRANCH "C:\myCode"