git svn command to get remote HEAD revision number - git-svn

is there a git svn command that will tell me the HEAD revision on the svn remote repositiory before I perform a git svn fetch?
Use case (Since someone asked why I'd want to do this.)
I want to check if there has been a large number of commits to the remote repository before I start the fetch, so I know whether to do something else* before it finishes, or just sit staring at the console because it will be done quickly.
* something else = go and make a coffee

Git has a similar feature with git ls-remote.
git svn itself might, through git svn info <url>, which does an svn info (without -r/-revision option support though)
Try using it with the URL of the remote SVN repository.
If it does now work, try svn info <url> directly.

Related

How to tag a git repo in a bamboo build

I'm trying to tag the git repo of a ruby gem in a Bamboo build. I thought doing something like this in ruby would do the job
`git tag v#{current_version}`
`git push --tags`
But the problem is that the repo does not have the origin. somehow Bamboo is getting rid of the origin
Any clue?
Yes, if you navigate to the job workspace, you will find that Bamboo does not do a straightforward git clone "under the hood", and the the remote is set to an internal file path.
Fortunately, Bamboo does store the original repository URL as ${bamboo.repository.git.repositoryUrl}, so all you need to do is set a remote pointing back at the original and push to there. This is what I've been using with both basic Git repositories and Stash, creating a tag based on the build number.
git tag -f -a ${bamboo.buildNumber} -m "${bamboo.planName} build number ${bamboo.buildNumber} passed automated acceptance testing." ${bamboo.planRepository.revision}
git remote add central ${bamboo.planRepository.repositoryUrl}
git push central ${bamboo.buildNumber}
git ls-remote --exit-code --tags central ${bamboo.buildNumber}
The final line is simply to cause the task to fail if the newly created tag cannot be read back.
EDIT: Do not be tempted to use the variable ${bamboo.repository.git.repositoryUrl}, as this will not necessarily point to the repo checked out in your job.
Also bear in mind that if you're checking out from multiple sources, ${bamboo.planRepository.repositoryUrl} points to the first repo in your "Source Code Checkout" task. The more specific URLs are referenced via:
${bamboo.planRepository.1.repositoryUrl}
${bamboo.planRepository.2.repositoryUrl}
...
and so on.
I know this is an old thread, however, I thought of adding this info.
From Bamboo version 6.7 onwards, it has the Git repository tagging feature Repository Tag.
You can add a repository tagging task to the job and the Bamboo variable as tag name.
You must have Bamboo-Bitbucket integrated via the application link.
It seems that after a checkout by the bamboo agent, the remote repository url for origin is set as file://nothing
[remote "origin"]
url = file://nothing
fetch = +refs/heads/*:refs/remotes/origin/*
That's why we can either update the url using git remote set-url or in my case I just created a new alias so it does not break the existing behavior. There must be a good reason why it is set this way.
[remote "build-origin"]
url = <remote url>
fetch = +refs/heads/*:refs/remotes/build-origin/*
I also noticed that using ${bamboo.planRepository.<position>.repositoryUrl} did not work for me since it was defined in my plan as https. Switching to ssh worked.

How can I recover after a checksum mismatch with 'git svn clone'?

I'm cloning an SVN repository to git as part of our migration plan. I've hit various snags along the way, forcing me to continue the clone with a git svn fetch command. The most recent failure I can't figure out how to solve:
$ git svn fetch
Checksum mismatch: dc/trunk-4632-jh/dc-smtpd/lib/Qpsmtpd/Address.pm.t 8ce3aea3f47dc115e8fe53bd62d0f074cfe93ec6
expected: 59de969022e46135fa6dc7599fc2f3b4
got: 4334926a01c905cdb7fce71265e370c1
I found this related answer, however that solution doesn't work because git svn log is not yet functional, as the repo is not fully in place:
$ git svn log dc/trunk-4632-jh/dc-smtpd/lib/Qpsmtpd/Address.pm.t
fatal: ambiguous argument 'HEAD': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions
log --no-color --first-parent --pretty=medium HEAD: command returned error: 128
How can I proceed?
Another answer to an old question but straight forward solutions are tough to find for this problem so hopefully this helps others.
I think this issue occurs due to a corrupted file during transfer. Not sure how or why it happens, but in my case, I get the same error at different revisions every time I do a new clone and sometimes not at all.
Using the questioners error message
$ git svn fetch
Checksum mismatch: dc/trunk-4632-jh/dc-smtpd/lib/Qpsmtpd/Address.pm.t
8ce3aea3f47dc115e8fe53bd62d0f074cfe93ec6
expected: 59de969022e46135fa6dc7599fc2f3b4
got: 4334926a01c905cdb7fce71265e370c1
The following steps allowed me to resume and progress :-
View all branches. These will all be remote branches. git branch -a
Checkout branch affected. git checkout remotes/origin/trunk-4632-jh
This will take some time to complete.
Find the last revision that the problematic file was changed. git svn log dc-smtpd/lib/Qpsmtpd/Address.pm.t
Note the highest revision #
Reset back to this rev. git svn reset -r (rev #) -p
Carry on. git svn fetch
Good luck.
I know this is old but maybe it will be helpful for future reference as all search results on this are not helpful.
I've hit similar issue on our huge repository which takes days to clone and unfortunately at one point I had to restart my machine. I am currently working out how to resolve the problem, so please keep in mind this is more a suggestion than tested solution.
I think you need to try creating a branch and checking out the commits you currently have from previous fetch:
git checkout -b master git-svn
After that is done you should have working tree up to that commit. Another fetches will probably fail due to object mismatch but at that point at least it should be possible to use "git svn reset" to revert faulty svn fetches (see OP's related answer link). If that's true find offending commit, reset before it and then continue fetching.
You might want to rebase and revert to state before that broken commit on your master branch or convert back to bare repository, if that's what you're after (in my case it is).
Hope this works. I'll post an update when my checkout is done (will take at least few hours... sigh).
Edit: That seemed to work. I successfully discarded some git-svn commits and am able to re-fetch them again. :)
Edit2: Make sure to reset until you don't get any object mismatch warnings on git svn fetch (otherwise you will run into the same issue soon).
Cheers,
Henryk
See also: Git svn rebase : checksum mismatch
In our case the additional treatment of the files (server-side includes in Apache) caused the checksum problem.
Disabling SSI in Apache's /etc/httpd.conf file for the period of migration by commenting out the
AddType text/html .shtml
AddOutputFilter INCLUDES .shtml
directives solved the problem, caused by the interpretation of .shtml files by the front-end Apache server, which produced a new content (and thus a new hash), other than the hash of the original file itself.
That means some files in the repository got corrupted. It can be caused by various reasons such as software bugs, bit rots in drives, etc. I was recently transitioning very old ~10GB svn repository to git, therefore some corruption was expected.
To fix the corruption, you basically need to dump the entire repository and import it while filtering the errors out. Note that our goal is to complete the import process no matter why or how the repository got corrupted. You cannot simply fix the corruption without having a backup and diffing through the revision files.
First basic one-off command you could use is:
svnadmin create repo2
svnadmin dump repo | sed '/^Text-content-md5/d' | svnadmin load repo2
This removes the checksum calculation from the dump so the new repo will have updated checksums.
If you encountered more errors during the dump and load (which is expected), try incremental approach so you can continue from the point you left. Below command will dump the revisions starting from 101 to 150 (inclusive).
svnadmin dump --incremental -r101:150 repo | sed '/^Text-content-md5/d' | svnadmin load repo2
Some common errors and solutions:
'Premature end of content data in dumpstream': That means Content-length of some file does not match the repository version, so some data is lost in the specified file. We must skip it. Add | svndumpfilter exclude path/to/file.jar command like this:
svnadmin dump --incremental -r101:150 repo | svndumpfilter exclude path/to/file.jar | sed '/^Text-content-md5/d' | svnadmin load repo2
Property errors: Add --bypass-prop-validation to svnadmin load command
After populating your second repo, you would simply svnserve -d -r repo2 and try git svn fetch again.
Good luck!

Is git svn dcommit atomic?

In my company we have a subversion server and everyone is using subversion on their machines.
However I'd like to use git, committing changes locally and then "push" them when I'm ready.
However, I can't understand what happens in the following situation.
Let's say that I made 3 git commits locally and now I'm ready to "push" everything on the subversion server. If I understand correctly, git svn dcommit should basically make 3 commits sequentially on the server, right? But what happens if in the meantime (let's say between the second and the third commit) another colleague of mine issues a commit?
The scenarios I can think of are:
1) git kind of "locks" (is that even possible?) the subversion server during commits so that my commits are doing atomically and my colleague's one is done after mine
2) The commit history on the server becomes mine1-mine2-other-mine3 (even if 'other' should fail since my colleague doesn't have an updated working copy at that point).
I think it's #2, but perhaps the committing speed is so high that this seldom becomes an issue. So which one is, #1 or #2?
No locks are not supported in Git, it's not a Git way (Git way is branching and merginig).
With git-svn you'll get mine1-mine2-other-mine3 history. If you need atomicity, have a look at SubGit project (it is installed into the SVN server and creates a pure Git interface for the SVN repository).
There was a similar question recently that might be interesting for you.
If you are lucky then number 2 but most of the time you aren't that lucky. In my experience when I dcommit a lot of commits and someone else commits while doing that usually 2 things happen:
It stops with dcommitting your other changes.
You lose the commits not-yet dcommitted.
Number 2 is really really annoying. The main problem is that you need to be totally up-to date to use git svn dcommit. This is because git-svn doesn't let the server merge revisions on the fly. (Because it would require both committers to have a working tree with both changes).
The only way to solve this are the following steps which I found here
Open .git/logs/HEAD
Look for your most recent commit (note that these commits are sorted
by “unix time”, although you can also find the latest one by reading
the shortlog there
Confirm that the commit you found is the right one: git show
git reset --hard hash from log
git svn rebase
git svn dcommit
Following this procedure allows you to take off from where it failed. I hope they fix this soon but they said this isn't priority for them yet.
Ofcourse if you commmit small groups and have a fast connection to the server it shouldn't happen that often. (I only got it 2-3 times when actively working and committing every day for 6 months).

git-svn : rebase fails multiple times then works

We are rolling out git on our clients to interact with a central SVN repository. On most work stations it works fine, but we have one work station where the person has to run git svn rebase 3-4 times before it completes. Each time there is no error, but random files are marks as modified or new. The files seem to be a commit that was pulled down from the central svn repository but not completed. Rerunning git svn rebase again a few times clears this up. The computer is top of the line with plenty of hard drive space and 16 gigs ram. Has anyone else ran into issues like this?
I had a similar issue that was solved by upgrading to git 1.8.
Why does "git rebase" leave opposite sets of modifications in the stage and the working copy?
Maybe you should try that.

RA layer request failed while git-svn fetch

I use git svn to sync with the subversion repos:
$ mkdir prj && cd prj
$ git svn init http://url/to/repos/branches/experimental
$ git svn fetch
and got the error message:
RA layer request failed: OPTIONS of 'http://url/to/repos/branches/experimental':
Could not read status line: connection was closed by proxy server
(http://url/to/repos) at /usr/bin/git-svn line 1352
Why and how can I fix this?
I had the same issue when accessing a SVN repo through a proxy.
The solution for me was to edit ~/.subversion/servers and add the needed proxy to the [globals] section. Uncomment the relevant lines (http-proxy-host, http-proxy-port, optionally http-proxy-username and http-proxy-password) and enter the needed information there.
This is needed because git svn uses the settings stored in ~/.subversion/servers to access SVN repositories.
It seems like this is a timeout issue on the server. Here's one bug report (I can't access the ticket it's a duplicate of, unfortunately). It's happening a lot to me, but if I just try the command again, it gets a little farther before timing out again. Eventually, I'll have the whole repository, and won't have to do this again, I hope.
I witnessed the similar
Could not read response body: connection was closed by server
I was able to resolve it by setting Timeout to 6000 in the Apache config.