I have a labview project with a mercurial repo.
If I update to the tip.
hg up tip
hg id
93cc...
I then load project.lvproj into labview2013 then
hg id
000000000000
I expect 93cc..., maybe 93cc...+.
also the parent gets set to -1.
Inspection of .hg folder shows that when labview is loaded, a file "dirstate" is deleted, and a new file "dirstate-55eed402" is created.
I haven't figured out why dirstate is being deleted, but knowing how to rebuild it is helpful:
hg debugrebuildstate -r tip
Related
I initially committed my project to a hg repo with the following structure:
myapp/
fizz/
buzz.txt
foobar.cfg
whistlefeather/
vroom-vroom-party-starter.xml
I did so using the following commands:
hg add
hg commit -m "Initial commit."
hg push
I then changed my directory structure locally to look like this:
myapp/
buzz/
fizz.txt
config.foobar
whistlefeather/
vroom-vroom-party-starter.xml
I then ran the same following commands:
hg add
hg commit -m "Changing some things."
hg push
When I go to the remote repo, I see it has the following structure (?!?):
myapp/
fizz/
buzz.txt
buzz/
fizz.txt
foobar.cfg
config.foobar
whistlefeather/
vroom-vroom-party-starter.xml
What commands can I run to push/purge the old directories/files from the remote repo (and so that it reflect the directory struture on my local machine)?
The hg add command you issued prior to your second commit did not actually remove files from under version control, but only added new ones. Now your repository is actually a melange of old and new files.
To add new files and remove missing ones, use hg addremove command or hg commit -A
It's actually simple to remember:
hg add adds files to the repo
hg remove removes files
hg move moves or renames files
hg addremove looks at current working dir and adds and removes files from the repo such that only the files still being present will continue to be tracked.
Each of these operation can be done in any sequence. And only a commit will actually create a changeset
I have got a question regarding suprepositories. Our project is set up like this:
+ projectA
+ some files
+ dependencyA
+ some files
dependencyA is a subrepository. It was created this way:
cd projectA
mkdir dependencyA
cd dependencyA
hg init
hg pull ssh://hg#somerandomiphere/dependencyA
cd ..
echo dependencyA = ssh://hg#somerandomiphere/dependencyA > .hgsub
hg add
hg commit
hg push
If I make changes to the suprepository, then commit and push them from main project. Both of them will be pushed to the server since its recursive. Now my colleague wants to pull changes from the server. But since nothing was changed in the main project, it wont work. But if I change something in the main project and push it to server. Upon hg pull he will get the newest changeset and if he does hg update then, it will update the subrepository as well. This is expected behaviour.
Now my question would be, if there is a way to pull changes, but only for subrepository without making a new clone of it or what would be the best way to do it.
Subrepository in Mercurial wiki, p. 2.5 "Pull"
The 'pull' command is by default not recursive. This is because
Mercurial won't know which subrepos are required until an update to a
specific changeset is requested. The update will pull the requested
subrepositories and changesets on demand. To get pull and update in
one step, use 'pull --update'.
Note that this matches exactly how 'pull' works without
subrepositories, considering that subrepositories lives in the working
directory:
'hg pull' gives you the upstream changesets but doesn't affect your working directory.
'hg update' updates the contents of your working directory (both in the top repo and in all subrepos)
It might be a good idea to always pull with --update if you have any
subrepositories. That will generally ensure that updates not will miss
any changesets and that update thus not will cause any pulls. If the
pull with update fails due to crossing branches then 'hg update' must
be used to get all the subrepository updates.
What was suggested above works like I thought it would. The real problem was my way of creating a subrepository.
Instead of:
cd projectA
mkdir
dependencyA
cd dependencyA
hg init
hg pull ssh://hg#somerandomiphere/dependencyA
It should have been a simple:
hg clone ssh://hg#somerandomiphere/dependencyA dependencyA
As we know .hgsusbtate will lock the subrepo on specific revision after commit. This is what happened, but (!) doing hg pull in subrepository ended with an error
paths cannot contain dot file components
So this means my subrepo was locked on the revision it was updated after commit and it could not pull changes from its repository due to the error shown above. Why this happened is explained pretty well in this accepted answer.
Solution:
cloning is the way to go
We're using a local central repository where everyone pushes to and pulls from. Until recently this repository only contained the .hg folder. Then someone went ahead and committed directly in the central repository creating an "island" changeset with no parent (parent = -1) nor child. The correct way would have been to add it in a local repository and push the changes.
Is there any way to get the working copy of the central repository to get back to the state where it only contain .hg and not be associated with a specific changeset?
The command:
hg update null
Updates a repository's working directory to the point before the first commit, so there are no files in the working directory and hg parents shows -1.
You'll still need to remove the commit if you don't want it, but that's a separate question/issue.
Since this is your local central repository and these are commands that edit history, please take every precaution, like trying things out on a copy of the repository first.
hg rollback (to remove the last repository change)
https://www.mercurial-scm.org/wiki/Rollback
Roll back the last transaction in a repository.
hg strip (to remove specific revisions)
https://www.mercurial-scm.org/wiki/Strip
hg strip rev removes the rev revision and all its descendants from a repository.
Also see:
https://www.mercurial-scm.org/wiki/EditingHistory
If you catch your mistake immediately (or reasonably soon), you can just use hg strip REV to roll back the latest (one or more) changes. ...
Edit: This answers the question in its original form. The OP has since edited the question.
Just delete everything except the .hg folder.
If I understand correctly what happened, someone changed into the repository directory and committed a single file as an 'added file' without first checking out any changeset from the active directory.
What you ended up with is something like the following history graph:
0:a43f 1:2843 2:bc81 3:2947
o ------ o ------ o ------ o
4:228f
o
where changeset 4:228f has the "null id" as its parent changeset.
Depending on whether you want to keep changeset 4:228f or not, you can follow one of the following strategies:
Option 1: Clone the repository without the offending change
You can create a new clone of the repository, specifying revision 3:2947 as the target revision. This will pull change 3:2947 and all its ancestor changesets into the new repository. Since the offending changeset is not linked into the ancestry of changeset 3:2947, it will not be part of the new clone.
I recommend saving the old repository first, and then moving everything over to a new clone, e.g. any repository-specific setup files you keep in its .hg/ directory.
If your current repository lives in /work/repo/foo, one way to do this would be:
$ cd /work/repo
$ mv foo foo.bak
$ hg clone -r 2947 foo.bak newfoo
Now copy over any .hg/ setup files, e.g. your original .hg/hgrc file:
$ cp foo.bak/.hg/hgrc newfoo/.hg/hgrc
Finally move the new foo repository in place:
$ mv newfoo foo
Option 2: Clone the repository and keep but rebase the change
Do the same as before, but before you move the newfoo repository in place, use the "hg export" command to extract a copy of the offending change from the old repository. Then check out a working copy of the tip-most changeset in the newfoo tree and import the file changes of the offending change as a normal changeset of your current history graph.
So, right before mv newfoo foo, save the patch of the offending change by typing:
$ cd /work/repo/foo.bak
$ hg export -r 228f --git > /tmp/patchfile.diff
then you can check-out the latest revision of the new repository, and re-import the patch on top of your current history:
$ cd /work/repo/newfoo
$ hg update --clean tip
$ hg import /tmp/patchfile.diff
If the offending changeset merely adds a new file, this should work fine and you are ready to move the new repository in place!
Before doing the final rename though, it may be a good idea to remove the working-copy files of the new repository:
$ cd /work/repo/newfoo
$ hg update --clean null
I have come across a problem that I "think" can only be resolved using patches.
I cloned a project from our main repository, made quite a few changes (updates, deletion of files & directory and additions) to it. These changes are not even committed. The problem is, project from the main repository has been deleted/removed and recreated as a new project (name is same, all the directory structures everything is same as before). I cloned that project again from the main repository and would like to transfer all my uncommitted changes to it.
I am still exploring the hg patch to resolve that. It would be helpful if someone could confirm that creating and adding a patch IS the right approach to this, any resources explaining the process would be of great help.
You're correct — a patch is what you need to transfer the information from one repository to another (unrelated) repository. This will work since the files are the same, as you note.
So, to transfer your uncommitted changes from your old clone, you do
$ hg diff -g > uncommited.patch
$ cd ../new
$ hg import --no-commit ../old/uncomitted.patch
That will restore the information saved in the patch. This includes information about files that are added or renamed in the old clone.
The following steps can be performed with a standard Mercurial install:
Commit the changes in your local repository. Note the revision number.
Use "hg export -r REV >patch.diff" to create a patch.
Clone the new repository.
Use "hg import patch.diff" to apply the patch to the new repository.
Example
C:\>hg init example
C:\>cd example
C:\example>echo >file1
C:\example>hg ci -Am file1
adding file1
C:\example>hg clone . ..\example2
updating to branch default
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
C:\example>rd /s/q .hg
C:\example>hg init
C:\example>hg ci -Am same-but-different
adding file1
At this point example and example2 have identical contents, but the repositories are unrelated to each other due to deleting and reinitializing the .hg folder.
Now make some changes and commit them in one of the repositories, then export them as a patch:
C:\example>echo >>file1
C:\example>echo >file2
C:\example>hg ci -Am changes
adding file2
C:\example>hg export -r 1 >patch.diff
Below shows that the other repository can't pull the changes, because of the reinitialization. It can, however, apply the patch successfully:
C:\example>cd ..\example2
C:\example2>hg pull
pulling from c:\example
searching for changes
abort: repository is unrelated
C:\example2>hg import ..\example\patch.diff
applying ..\example\patch.diff
I would first make copies of everything so you have a way of backtracking.
Then, in the working copy with the changes, I would first delete the .hg directory, then copy in the .hg directory from the new repo. This basically transfers all of the changed files into the new repo without the need to delete any files and directories.
You will still need to tell the repo about whether to remove any files marked as missing. You will also have to handle renames manually. If this is a small number of operations, it's easier than trying to use the patch method.
Once this is done, commit your changes and push, if necessary.
seems like what you want is patch queues. In that you have uncommitted changes, and you want to pull from the new repo before committing them....
$ hg qinit -c # initialize mq for your repo containing the uncommitted changes
$ hg qnew name_of_patch # create patch that contains your uncommitted changes
$ hg qpop # resets your working dir back to the parent changeset
no worries though, your changes are safe and sound in .hg/patches/name_of_patch to see for yourself.....
$ cat .hg/patches/name_of_patch
now pull in the new repo
$ hg pull -u http://location.of.new/repo # pull in changes from new repo update working dir
$ hg qpush # apply your uncommitted changes to new repo
If you are lucky you will have no merge conflicts and you can go ahead and commit the patch by....
$ hg qfinish -a # change all applied patches to changeset
And then if you want....
$ hg push http://location.of.new/repo
If the repos are unrelated, just init a patch repo on your new repo. and manually copy the patch in and add it to .hg/patches/series file.
assuming patch was created. clone new repo
$ hg clone http://location.of.new/repo ./new_repo
init patch repo
$ cd ./new_repo && hg qinit -c
copy patch
$ cp ../old_repo/.hg/patches/name_of_patch .hg/patches/
edit series file using an editor of some sort
$ your_favorite_editor .hg/patches/series
name_of_patch # <---put this in the series file
apply your patch to new repo
$ hg qpush
if no merge conflicts and you are convinced it works
$ hg qfinish -a
If the layout is the same, you can just copy all the files over (excluding .hg) and then use hg addrem.
Try to look into the MQ plugin, it does exactly this if I recall. I've never had a use for that though, so I can't say.
If the old repository was simply moved/cloned to a new URL then you could simply change the remote repository you talk to the new one.
If, however, it was recreated from the ground up (even with the same structure) then I don't believe Mercurial has any built-in functionality to help you here. Mercurial patches reference specific changesets which won't exist in your new repository.
You could use a merge tool to perform the diff and bring across any changes you made.
Edited To answer the question in the comment:
When you clone the repository you are taking a complete snapshot of the entire change history - along with the associated change-set IDs, etc.
Mercurial tracks changes by change-sets to the repository, rather than at the file level like Subversion.
If you clone, then you can easily push/merge into another repository that was also cloned from the same source.
If you recreated the repository then the change IDs won't match, and can't be merged in Hg.
The only option in this scenario would be to use a Merge tool which will let you see mismatches in files/folder structure.
Also: Worth pointing out http://hginit.com/ because it explains (indirectly) some of this.
I am looking for best practices to do the following:
When I need to implement a feature or fix a bug, I am creating new Mercurial repository from the main one (a trunk).
Then, within some days, or weeks, I am implementing the task in newly created repository, making commits and periodically merging with trunk. After the code in new repository will pass all code reviews, I should provide a repository with all changes collapsed into single revision.
My common way to do this (rdiff extension should be enabled):
hg clone ~/repos/trunk ~/repos/new-collapsed
cd ~/repos/new-collapsed
hg diff ~/repos/new > new.diff
patch -p1 < new.diff
hg commit
This works almost well except when there are binary files present in the changes from ~/repos/new. Another way could be:
hg clone ~/repos/trunk ~/repos/new-collapsed
cd ~/repos/new-collapsed
hg pull ~/repos/new
hg update
hg rollback
then resolve possible conflicts and manually commit the changes
Both ways look for me somewhat ugly and non-native, so I am looking how this operation could be simplified. I've played with rebase extension, but seems its hg rebase --collapse command does not work with workflow described above.
Any ideas are welcome.
Sounds like a good case for mercurial queues.
I do something similar with the histedit extension.
My workflow is something like:
clone a central repo
commit incremental changes to local repo
clone my local repo to make collapsed repo
hg histedit and select/discard/fold the revisions as needed
hg push the collapsed repo to central repo
pull central repo to local or refresh local from scratch
I ensure that my local repo never gets pushed to the central repo by adding an invalid default-push path to the .hg/hgrc file in the local repo root directory.
Solved: Just add
[diff]
git = True
to your hgrc file, and then use my first solution with rdiff extension, replacing patch with hg import:
hg clone ~/repos/trunk ~/repos/new-collapsed
cd ~/repos/new-collapsed
hg diff ~/repos/new > new.diff
hg import new.diff
hg commit