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
Related
I want to clone part of repository to non-tip changeset, so I use TortoiseHG -> Clone command, enter commit URL and clone. For some reason I get the clone to the last changeset, not that I wanted to clone.
How to clone to old changeset?
I've read that I can do this with git commands. Can I do it with TortoiseHG?
You clone not "commit", but "repository"
If you want to have partial clone, you have to read hg help clone
Procedure and syntax is common to all and any repositories, unrelated to BitBucket
To pull only a subset of changesets, specify one or more revisions
identifiers with -r/--rev or branches with -b/--branch. The resulting
clone will contain only the specified changesets and their ancestors.
hg clone -r <ID> SRC
hg help urls suggests second form of command
hg clone SRC#ID
GUI-way
In case of pure GUI in TortoiseHG "Clone" dialogue, expand "Options" enable "Clone to revision" and define this revision ID
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
I am familiar with TFS and Vault, but having just started using Mercurial I seem to be getting into a bit of a mess.
Heres what I (think) I've done:
-Created a central repository on bitbucket.org
-On my desktop PC, cloned repository from bitbucket, added files, commit them, push them to bitbucket
-On my laptop, cloned repository from bitbucket, pulled files, added more files, commit them, push them to bitbucket
I've continued to add, edit etc on the different computers.
Now I've noticed that some files from each computer are not in the bitbucket repository, and therefore only in the local repository. No amount of pulling and pushing seems to get it into the bitbucket repository.
What is the most likely thing I've done wrong?
Is there a way to 'force' by changes up to the bitbucket repository?
Did they get into your local repository? I suspect not, i.e. they were new files that were not added to the commit. Use hg add to add them to the changeset before committing or whatever the equivalent is for whatever mercurial interface you're using.
Edit:
Here's the help from Mercurial:
C:\Users\Bert>hg add --help
hg add [OPTION]... [FILE]...
add the specified files on the next commit
Schedule files to be version controlled and added to the repository.
The files will be added to the repository at the next commit. To undo an
add before that, see "hg forget".
If no names are given, add all files to the repository.
...
See Mercurial: The Definitive Guide (a.k.a. the hg "red book") for more info:
http://hgbook.red-bean.com/read/mercurial-in-daily-use.html
Telling Mercurial which files to track
Mercurial does not work with files in your repository unless you tell it to manage them. The hg status command will tell you which files Mercurial doesn't know about; it uses a “?” to display such files.
To tell Mercurial to track a file, use the hg add command. Once you have added a file, the entry in the output of hg status for that file changes from “?” to “A”.
$ hg init add-example
$ cd add-example
$ echo a > myfile.txt
$ hg status
? myfile.txt
$ hg add myfile.txt
$ hg status
A myfile.txt
$ hg commit -m 'Added one file'
$ hg status
use "hg -v help add" to show global options
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 have a clone of a central repo at rev 2048. I want to remove the last 10 changesets on my local repo as if I was back in time two weeks ago. I suppose I could delete my local repo and do "hg clone -rev 2038" but that would be long (cloning the repo takes several minutes). Is there a way to just "unpull" some changesets?
Notes:
I'm not trying to backout the changesets. I'll eventually pull those changesets again from the central repo.
I'm not trying to update the working directory to an earlier version; I really want to affect the repository.
I don't have any outgoing changesets or pending modifications in my current repo and working directory.
Use the strip command:
hg strip -r 2039
This command is provided by the StripExtension. It is distributed as part of Mercurial 2.8 and later, but you do need to enable it first by adding the following lines to your .hgrc or Mercurial.ini:
[extensions]
strip =
Before Mercurial 2.8, it was part of the MqExtension.
To prevent you from accidentally destroying history, the command will generate a backup bundle in .hg/strip-backup/ which you can hg unbundle again if desired.
Cloning your local repo should be fast. I assume "several minutes" refers to a remote repo?
You can use hg clone <local repo> <new repo> -r <revision> to only clone up to a certain revision.
To remove a changeset that was already committed and pushed use :
hg backout -r (changeset number)
To remove a changeset that was committed but not pushed use :
hg strip -r (changeset number)
For versions previous to Mercurial 2.8, the Strip was part of the MqExtension.
In case you need to Enable the old MQ Extensions,
you can do it by adding this:
[extensions]
hgext.mq =
to your ~/.hgrc (or mercurial.ini) file.
The Strip information used to be here but now it can be found here.