git-svn(1) ========== NAME ---- git-svn - Bidirectional operation between a single Subversion branch and git SYNOPSIS -------- 'git-svn' [options] [arguments] DESCRIPTION ----------- git-svn is a simple conduit for changesets between Subversion and git. It is not to be confused with gitlink:git-svnimport[1], which is read-only. git-svn was originally designed for an individual developer who wants a bidirectional flow of changesets between a single branch in Subversion and an arbitrary number of branches in git. Since its inception, git-svn has gained the ability to track multiple branches in a manner similar to git-svnimport. git-svn is especially useful when it comes to tracking repositories not organized in the way Subversion developers recommend (trunk, branches, tags directories). COMMANDS -------- -- 'init':: Initializes an empty git repository with additional metadata directories for git-svn. The Subversion URL may be specified as a command-line argument, or as full URL arguments to -T/-t/-b. Optionally, the target directory to operate on can be specified as a second argument. Normally this command initializes the current directory. -T:: --trunk=:: -t:: --tags=:: -b:: --branches=:: These are optional command-line options for init. Each of these flags can point to a relative repository path (--tags=project/tags') or a full url (--tags=https://foo.org/project/tags) --prefix= This allows one to specify a prefix which is prepended to the names of remotes if trunk/branches/tags are specified. The prefix does not automatically include a trailing slash, so be sure you include one in the argument if that is what you want. This is useful if you wish to track multiple projects that share a common repository. 'fetch':: Fetch unfetched revisions from the Subversion remote we are tracking. The name of the [svn-remote "..."] section in the .git/config file may be specified as an optional command-line argument. 'dcommit':: Commit each diff from a specified head directly to the SVN repository, and then rebase or reset (depending on whether or not there is a diff between SVN and head). This will create a revision in SVN for each commit in git. It is recommended that you run git-svn fetch and rebase (not pull or merge) your commits against the latest changes in the SVN repository. An optional command-line argument may be specified as an alternative to HEAD. This is advantageous over 'set-tree' (below) because it produces cleaner, more linear history. 'log':: This should make it easy to look up svn log messages when svn users refer to -r/--revision numbers. The following features from `svn log' are supported: --revision=[:] - is supported, non-numeric args are not: HEAD, NEXT, BASE, PREV, etc ... -v/--verbose - it's not completely compatible with the --verbose output in svn log, but reasonably close. --limit= - is NOT the same as --max-count, doesn't count merged/excluded commits --incremental - supported New features: --show-commit - shows the git commit sha1, as well --oneline - our version of --pretty=oneline Any other arguments are passed directly to `git log' 'set-tree':: You should consider using 'dcommit' instead of this command. Commit specified commit or tree objects to SVN. This relies on your imported fetch data being up-to-date. This makes absolutely no attempts to do patching when committing to SVN, it simply overwrites files with those specified in the tree or commit. All merging is assumed to have taken place independently of git-svn functions. 'show-ignore':: Recursively finds and lists the svn:ignore property on directories. The output is suitable for appending to the $GIT_DIR/info/exclude file. 'commit-diff':: Commits the diff of two tree-ish arguments from the command-line. This command is intended for interoperability with git-svnimport and does not rely on being inside an git-svn init-ed repository. This command takes three arguments, (a) the original tree to diff against, (b) the new tree result, (c) the URL of the target Subversion repository. The final argument (URL) may be omitted if you are working from a git-svn-aware repository (that has been init-ed with git-svn). The -r option is required for this. -- OPTIONS ------- -- --shared[={false|true|umask|group|all|world|everybody}]:: --template=:: Only used with the 'init' command. These are passed directly to gitlink:git-init[1]. -r :: --revision :: Used with the 'fetch' command. This allows revision ranges for partial/cauterized history to be supported. $NUMBER, $NUMBER1:$NUMBER2 (numeric ranges), $NUMBER:HEAD, and BASE:$NUMBER are all supported. This can allow you to make partial mirrors when running fetch; but is generally not recommended because history will be skipped and lost. -:: --stdin:: Only used with the 'set-tree' command. Read a list of commits from stdin and commit them in reverse order. Only the leading sha1 is read from each line, so git-rev-list --pretty=oneline output can be used. --rmdir:: Only used with the 'dcommit', 'set-tree' and 'commit-diff' commands. Remove directories from the SVN tree if there are no files left behind. SVN can version empty directories, and they are not removed by default if there are no files left in them. git cannot version empty directories. Enabling this flag will make the commit to SVN act like git. config key: svn.rmdir -e:: --edit:: Only used with the 'dcommit', 'set-tree' and 'commit-diff' commands. Edit the commit message before committing to SVN. This is off by default for objects that are commits, and forced on when committing tree objects. config key: svn.edit -l:: --find-copies-harder:: Only used with the 'dcommit', 'set-tree' and 'commit-diff' commands. They are both passed directly to git-diff-tree see gitlink:git-diff-tree[1] for more information. [verse] config key: svn.l config key: svn.findcopiesharder -A:: --authors-file=:: Syntax is compatible with the files used by git-svnimport and git-cvsimport: ------------------------------------------------------------------------ loginname = Joe User ------------------------------------------------------------------------ If this option is specified and git-svn encounters an SVN committer name that does not exist in the authors-file, git-svn will abort operation. The user will then have to add the appropriate entry. Re-running the previous git-svn command after the authors-file is modified should continue operation. config key: svn.authorsfile -q:: --quiet:: Make git-svn less verbose. --repack[=]:: --repack-flags= These should help keep disk usage sane for large fetches with many revisions. --repack takes an optional argument for the number of revisions to fetch before repacking. This defaults to repacking every 1000 commits fetched if no argument is specified. --repack-flags are passed directly to gitlink:git-repack[1]. config key: svn.repack config key: svn.repackflags -m:: --merge:: -s:: --strategy=:: These are only used with the 'dcommit' command. Passed directly to git-rebase when using 'dcommit' if a 'git-reset' cannot be used (see dcommit). -n:: --dry-run:: This is only used with the 'dcommit' command. Print out the series of git arguments that would show which diffs would be committed to SVN. -- ADVANCED OPTIONS ---------------- -- -i:: --id :: This sets GIT_SVN_ID (instead of using the environment). This allows the user to override the default refname to fetch from when tracking a single URL. The 'log' and 'dcommit' commands no longer require this switch as an argument. -R:: --svn-remote :: Specify the [svn-remote ""] section to use, this allows SVN multiple repositories to be tracked. Default: "svn" --follow-parent:: This is especially helpful when we're tracking a directory that has been moved around within the repository, or if we started tracking a branch and never tracked the trunk it was descended from. This feature is enabled by default, use --no-follow-parent to disable it. config key: svn.followparent svn.noMetadata: svn-remote..noMetadata: This gets rid of the git-svn-id: lines at the end of every commit. If you lose your .git/svn/git-svn/.rev_db file, git-svn will not be able to rebuild it and you won't be able to fetch again, either. This is fine for one-shot imports. The 'git-svn log' command will not work on repositories using this, either. Using this conflicts with the 'useSvmProps' option for (hopefully) obvious reasons. svn.useSvmProps: svn-remote..useSvmProps: This allows git-svn to re-map repository URLs and UUIDs from mirrors created using SVN::Mirror (or svk) for metadata. If an SVN revision has a property, "svm:headrev", it is likely that the revision was created by SVN::Mirror (also used by SVK). The property contains a repository UUID and a revision. We want to make it look like we are mirroring the original URL, so introduce a helper function that returns the original identity URL and UUID, and use it when generating metadata in commit messages. Using this conflicts with the 'noMetadata' option for (hopefully) obvious reasons. -- Basic Examples ~~~~~~~~~~~~~~ Tracking and contributing to a the trunk of a Subversion-managed project: ------------------------------------------------------------------------ # Initialize a repo (like git init): git-svn init http://svn.foo.org/project/trunk # Fetch remote revisions: git-svn fetch # Create your own branch to hack on: git checkout -b my-branch remotes/git-svn # Do some work, and then commit your new changes to SVN, as well as # automatically updating your working HEAD: git-svn dcommit # Something is committed to SVN, rebase the latest into your branch: git-svn fetch && git rebase remotes/git-svn # Append svn:ignore settings to the default git exclude file: git-svn show-ignore >> .git/info/exclude ------------------------------------------------------------------------ Tracking and contributing to an entire Subversion-managed project (complete with a trunk, tags and branches): ------------------------------------------------------------------------ # Initialize a repo (like git init): git-svn init http://svn.foo.org/project -T trunk -b branches -t tags # Fetch remote revisions: git-svn fetch # Create your own branch of trunk to hack on: git checkout -b my-trunk remotes/trunk # Do some work, and then commit your new changes to SVN, as well as # automatically updating your working HEAD: git-svn dcommit # Something has been committed to trunk, rebase the latest into your branch: git-svn fetch && git rebase remotes/trunk # Append svn:ignore settings of trunk to the default git exclude file: git-svn show-ignore -i trunk >> .git/info/exclude ------------------------------------------------------------------------ REBASE VS. PULL/MERGE --------------------- Originally, git-svn recommended that the remotes/git-svn branch be pulled or merged from. This is because the author favored 'git-svn set-tree B' to commit a single head rather than the 'git-svn set-tree A..B' notation to commit multiple commits. If you use 'git-svn set-tree A..B' to commit several diffs and you do not have the latest remotes/git-svn merged into my-branch, you should use 'git rebase' to update your work branch instead of 'git pull' or 'git merge'. 'pull/merge' can cause non-linear history to be flattened when committing into SVN, which can lead to merge commits reversing previous commits in SVN. DESIGN PHILOSOPHY ----------------- Merge tracking in Subversion is lacking and doing branched development with Subversion is cumbersome as a result. git-svn does not do automated merge/branch tracking by default and leaves it entirely up to the user on the git side. git-svn does however follow copy history of the directory that it is tracking, however (much like how 'svn log' works). BUGS ---- We ignore all SVN properties except svn:executable. Too difficult to map them since we rely heavily on git write-tree being _exactly_ the same on both the SVN and git working trees and I prefer not to clutter working trees with metadata files. Renamed and copied directories are not detected by git and hence not tracked when committing to SVN. I do not plan on adding support for this as it's quite difficult and time-consuming to get working for all the possible corner cases (git doesn't do it, either). Renamed and copied files are fully supported if they're similar enough for git to detect them. CONFIGURATION ------------- git-svn stores [svn-remote] configuration information in the repository .git/config file. It is similar the core git [remote] sections except 'fetch' keys do not accept glob arguments; but they are instead handled by the 'branches' and 'tags' keys. Since some SVN repositories are oddly configured with multiple projects glob expansions such those listed below are allowed: ------------------------------------------------------------------------ [svn-remote "project-a"] url = http://server.org/svn branches = branches/*/project-a:refs/remotes/project-a/branches/* tags = tags/*/project-a:refs/remotes/project-a/tags/* trunk = trunk/project-a:refs/remotes/project-a/trunk ------------------------------------------------------------------------ Keep in mind that the '*' (asterisk) wildcard of the local ref (left of the ':') *must* be the farthest right path component; however the remote wildcard may be anywhere as long as it's own independent path componet (surrounded by '/' or EOL). This type of configuration is not automatically created by 'init' and should be manually entered with a text-editor or using gitlink:git-config[1] SEE ALSO -------- gitlink:git-rebase[1] Author ------ Written by Eric Wong . Documentation ------------- Written by Eric Wong .