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Diffstat (limited to 'Documentation/git-svn.txt')
| -rw-r--r-- | Documentation/git-svn.txt | 504 |
1 files changed, 325 insertions, 179 deletions
diff --git a/Documentation/git-svn.txt b/Documentation/git-svn.txt index ca3fc3de1f..b09bd9761f 100644 --- a/Documentation/git-svn.txt +++ b/Documentation/git-svn.txt @@ -3,7 +3,7 @@ git-svn(1) NAME ---- -git-svn - Bidirectional operation between a single Subversion branch and git +git-svn - Bidirectional operation between a Subversion repository and git SYNOPSIS -------- @@ -11,27 +11,25 @@ SYNOPSIS DESCRIPTION ----------- -'git-svn' is a simple conduit for changesets between Subversion and git. +'git svn' is a simple conduit for changesets between Subversion and git. It provides a bidirectional flow of changes between a Subversion and a git repository. -'git-svn' can track a single Subversion branch simply by using a -URL to the branch, follow branches laid out in the Subversion recommended -method (trunk, branches, tags directories) with the --stdlayout option, or -follow branches in any layout with the -T/-t/-b options (see options to -'init' below, and also the 'clone' command). +'git svn' can track a standard Subversion repository, +following the common "trunk/branches/tags" layout, with the --stdlayout option. +It can also follow branches and tags in any layout with the -T/-t/-b options +(see options to 'init' below, and also the 'clone' command). -Once tracking a Subversion branch (with any of the above methods), the git +Once tracking a Subversion repository (with any of the above methods), the git repository can be updated from Subversion by the 'fetch' command and Subversion updated from git by the 'dcommit' command. COMMANDS -------- --- 'init':: Initializes an empty git repository with additional - metadata directories for 'git-svn'. The Subversion URL + 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 @@ -48,8 +46,11 @@ COMMANDS --stdlayout;; 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). The option --stdlayout is + (--tags=project/tags) or a full url + (--tags=https://foo.org/project/tags). + You can specify more than one --tags and/or --branches options, in case + your Subversion repository places tags or branches under multiple paths. + The option --stdlayout is a shorthand way of setting trunk,tags,branches as the relative paths, which is the Subversion default. If any of the other options are given as well, they take precedence. @@ -61,16 +62,8 @@ COMMANDS Set the 'useSvnsyncProps' option in the [svn-remote] config. --rewrite-root=<URL>;; Set the 'rewriteRoot' option in the [svn-remote] config. ---use-log-author;; - When retrieving svn commits into git (as part of fetch, rebase, or - dcommit operations), look for the first From: or Signed-off-by: line - in the log message and use that as the author string. ---add-author-from;; - When committing to svn from git (as part of commit or dcommit - operations), if the existing log message doesn't already have a - From: or Signed-off-by: line, append a From: line based on the - git commit's author string. If you use this, then --use-log-author - will retrieve a valid author string for all commits. +--rewrite-uuid=<UUID>;; + Set the 'rewriteUUID' option in the [svn-remote] config. --username=<USER>;; For transports that SVN handles authentication for (http, https, and plain svn), specify the username. For other @@ -89,6 +82,17 @@ COMMANDS When passed to 'init' or 'clone' this regular expression will be preserved as a config key. See 'fetch' for a description of '--ignore-paths'. +--no-minimize-url;; + When tracking multiple directories (using --stdlayout, + --branches, or --tags options), git svn will attempt to connect + to the root (or highest allowed level) of the Subversion + repository. This default allows better tracking of history if + entire projects are moved within a repository, but may cause + issues on repositories where read access restrictions are in + place. Passing '--no-minimize-url' will allow git svn to + accept URLs as-is without attempting to connect to a higher + level directory. This option is off by default when only + one URL/branch is tracked (it would do little good). 'fetch':: Fetch unfetched revisions from the Subversion remote we are @@ -98,38 +102,57 @@ COMMANDS --localtime;; Store Git commit times in the local timezone instead of UTC. This - makes 'git-log' (even without --date=local) show the same times + makes 'git log' (even without --date=local) show the same times that `svn log` would in the local timezone. - ---parent;; - Fetch only from the SVN parent of the current HEAD. - ++ This doesn't interfere with interoperating with the Subversion repository you cloned from, but if you wish for your local Git repository to be able to interoperate with someone else's local Git repository, either don't use this option or you should both use it in the same local timezone. +--parent;; + Fetch only from the SVN parent of the current HEAD. + --ignore-paths=<regex>;; This allows one to specify a Perl regular expression that will cause skipping of all matching paths from checkout from SVN. The '--ignore-paths' option should match for every 'fetch' (including automatic fetches due to 'clone', 'dcommit', 'rebase', etc) on a given repository. - ++ +[verse] config key: svn-remote.<name>.ignore-paths - - If the ignore-paths config key is set and the command - line option is also given, both regular expressions - will be used. - ++ +If the ignore-paths config key is set and the command line option is +also given, both regular expressions will be used. ++ Examples: ++ +-- +Skip "doc*" directory for every fetch;; ++ +------------------------------------------------------------------------ +--ignore-paths="^doc" +------------------------------------------------------------------------ - --ignore-paths="^doc" - skip "doc*" directory for every - fetch. +Skip "branches" and "tags" of first level directories;; ++ +------------------------------------------------------------------------ +--ignore-paths="^[^/]+/(?:branches|tags)" +------------------------------------------------------------------------ +-- - --ignore-paths="^[^/]+/(?:branches|tags)" - skip - "branches" and "tags" of first level directories. +--use-log-author;; + When retrieving svn commits into git (as part of fetch, rebase, or + dcommit operations), look for the first From: or Signed-off-by: line + in the log message and use that as the author string. +--add-author-from;; + When committing to svn from git (as part of commit or dcommit + operations), if the existing log message doesn't already have a + From: or Signed-off-by: line, append a From: line based on the + git commit's author string. If you use this, then --use-log-author + will retrieve a valid author string for all commits. 'clone':: Runs 'init' and 'fetch'. It will automatically create a @@ -137,29 +160,29 @@ Examples: or if a second argument is passed; it will create a directory and work within that. It accepts all arguments that the 'init' and 'fetch' commands accept; with the exception of - '--fetch-all'. After a repository is cloned, the 'fetch' - command will be able to update revisions without affecting - the working tree; and the 'rebase' command will be able - to update the working tree with the latest changes. + '--fetch-all' and '--parent'. After a repository is cloned, + the 'fetch' command will be able to update revisions without + affecting the working tree; and the 'rebase' command will be + able to update the working tree with the latest changes. 'rebase':: This fetches revisions from the SVN parent of the current HEAD and rebases the current (uncommitted to SVN) work against it. - -This works similarly to `svn update` or 'git-pull' except that -it preserves linear history with 'git-rebase' instead of -'git-merge' for ease of dcommitting with 'git-svn'. - -This accepts all options that 'git-svn fetch' and 'git-rebase' ++ +This works similarly to `svn update` or 'git pull' except that +it preserves linear history with 'git rebase' instead of +'git merge' for ease of dcommitting with 'git svn'. ++ +This accepts all options that 'git svn fetch' and 'git rebase' accept. However, '--fetch-all' only fetches from the current [svn-remote], and not all [svn-remote] definitions. - -Like 'git-rebase'; this requires that the working tree be clean ++ +Like 'git rebase'; this requires that the working tree be clean and have no uncommitted changes. -l;; --local;; - Do not fetch remotely; only run 'git-rebase' against the + Do not fetch remotely; only run 'git rebase' against the last fetched commit from the upstream SVN. 'dcommit':: @@ -167,11 +190,12 @@ and have no uncommitted changes. 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 + 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. + An optional revision or branch argument may be specified, and + causes 'git svn' to do all work on that revision/branch + instead of HEAD. This is advantageous over 'set-tree' (below) because it produces cleaner, more linear history. + @@ -179,18 +203,17 @@ and have no uncommitted changes. After committing, do not rebase or reset. --commit-url <URL>;; Commit to this SVN URL (the full path). This is intended to - allow existing git-svn repositories created with one transport + allow existing 'git svn' repositories created with one transport method (e.g. `svn://` or `http://` for anonymous read) to be reused if a user is later given access to an alternate transport method (e.g. `svn+ssh://` or `https://`) for commit. - ++ +[verse] config key: svn-remote.<name>.commiturl - config key: svn.commiturl (overwrites all svn-remote.<name>.commiturl options) - - Using this option for any other purpose (don't ask) - is very strongly discouraged. --- ++ +Using this option for any other purpose (don't ask) is very strongly +discouraged. 'branch':: Create a branch in the SVN repository. @@ -204,6 +227,33 @@ config key: svn.commiturl (overwrites all svn-remote.<name>.commiturl options) Create a tag by using the tags_subdir instead of the branches_subdir specified during git svn init. +-d;; +--destination;; + If more than one --branches (or --tags) option was given to the 'init' + or 'clone' command, you must provide the location of the branch (or + tag) you wish to create in the SVN repository. The value of this + option must match one of the paths specified by a --branches (or + --tags) option. You can see these paths with the commands ++ + git config --get-all svn-remote.<name>.branches + git config --get-all svn-remote.<name>.tags ++ +where <name> is the name of the SVN repository as specified by the -R option to +'init' (or "svn" by default). + +--username;; + Specify the SVN username to perform the commit as. This option overrides + the 'username' configuration property. + +--commit-url;; + Use the specified URL to connect to the destination Subversion + repository. This is useful in cases where the source SVN + repository is read-only. This option overrides configuration + property 'commiturl'. ++ + git config --get-all svn-remote.<name>.commiturl ++ + 'tag':: Create a tag in the SVN repository. This is a shorthand for 'branch -t'. @@ -215,10 +265,12 @@ config key: svn.commiturl (overwrites all svn-remote.<name>.commiturl options) The following features from `svn log' are supported: + -- +-r <n>[:<n>];; --revision=<n>[:<n>];; is supported, non-numeric args are not: HEAD, NEXT, BASE, PREV, etc ... --v/--verbose;; +-v;; +--verbose;; it's not completely compatible with the --verbose output in svn log, but reasonably close. --limit=<n>;; @@ -241,7 +293,7 @@ NOTE: SVN itself only stores times in UTC and nothing else. The regular svn client converts the UTC time to the local time (or based on the TZ= environment). This command has the same behaviour. + -Any other arguments are passed directly to 'git-log' +Any other arguments are passed directly to 'git log' 'blame':: Show what revision and author last modified each line of a file. The @@ -249,15 +301,14 @@ Any other arguments are passed directly to 'git-log' `svn blame' by default. Like the SVN blame command, local uncommitted changes in the working copy are ignored; the version of the file in the HEAD revision is annotated. Unknown - arguments are passed directly to 'git-blame'. + arguments are passed directly to 'git blame'. + --git-format;; - Produce output in the same format as 'git-blame', but with + Produce output in the same format as 'git blame', but with SVN revision numbers instead of git commit hashes. In this mode, changes that haven't been committed to SVN (including local working-copy edits) are shown as revision 0. --- 'find-rev':: When given an SVN revision number of the form 'rN', returns the corresponding git commit hash (this can optionally be followed by a @@ -271,7 +322,7 @@ Any other arguments are passed directly to 'git-log' 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. + independently of 'git svn' functions. 'create-ignore':: Recursively finds the svn:ignore property on directories and @@ -284,14 +335,21 @@ Any other arguments are passed directly to 'git-log' directories. The output is suitable for appending to the $GIT_DIR/info/exclude file. +'mkdirs':: + Attempts to recreate empty directories that core git cannot track + based on information in $GIT_DIR/svn/<refname>/unhandled.log files. + Empty directories are automatically recreated when using + "git svn clone" and "git svn rebase", so "mkdirs" is intended + for use after commands like "git checkout" or "git reset". + 'commit-diff':: Commits the diff of two tree-ish arguments from the - command-line. This command does not rely on being inside an `git-svn + command-line. This command 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'). + (URL) may be omitted if you are working from a 'git svn'-aware + repository (that has been `init`-ed with 'git svn'). The -r<revision> option is required for this. 'info':: @@ -313,116 +371,170 @@ Any other arguments are passed directly to 'git-log' Shows the Subversion externals. Use -r/--revision to specify a specific revision. --- +'gc':: + Compress $GIT_DIR/svn/<refname>/unhandled.log files in .git/svn + and remove $GIT_DIR/svn/<refname>index files in .git/svn. + +'reset':: + Undoes the effects of 'fetch' back to the specified revision. + This allows you to re-'fetch' an SVN revision. Normally the + contents of an SVN revision should never change and 'reset' + should not be necessary. However, if SVN permissions change, + or if you alter your --ignore-paths option, a 'fetch' may fail + with "not found in commit" (file not previously visible) or + "checksum mismatch" (missed a modification). If the problem + file cannot be ignored forever (with --ignore-paths) the only + way to repair the repo is to use 'reset'. ++ +Only the rev_map and refs/remotes/git-svn are changed. Follow 'reset' +with a 'fetch' and then 'git reset' or 'git rebase' to move local +branches onto the new tree. + +-r <n>;; +--revision=<n>;; + Specify the most recent revision to keep. All later revisions + are discarded. +-p;; +--parent;; + Discard the specified revision as well, keeping the nearest + parent instead. +Example:;; +Assume you have local changes in "master", but you need to refetch "r2". ++ +------------ + r1---r2---r3 remotes/git-svn + \ + A---B master +------------ ++ +Fix the ignore-paths or SVN permissions problem that caused "r2" to +be incomplete in the first place. Then: ++ +[verse] +git svn reset -r2 -p +git svn fetch ++ +------------ + r1---r2'--r3' remotes/git-svn + \ + r2---r3---A---B master +------------ ++ +Then fixup "master" with 'git rebase'. +Do NOT use 'git merge' or your history will not be compatible with a +future 'dcommit'! ++ +[verse] +git rebase --onto remotes/git-svn A^ master ++ +------------ + r1---r2'--r3' remotes/git-svn + \ + A'--B' master +------------ OPTIONS ------- --- --shared[={false|true|umask|group|all|world|everybody}]:: --template=<template_directory>:: Only used with the 'init' command. - These are passed directly to 'git-init'. + These are passed directly to 'git init'. -r <ARG>:: --revision <ARG>:: - -Used with the 'fetch' command. - + 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. - + 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. +'git rev-list --pretty=oneline' output can be used. --rmdir:: - -Only used with the 'dcommit', 'set-tree' and 'commit-diff' commands. - + 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. - ++ +[verse] config key: svn.rmdir -e:: --edit:: - -Only used with the 'dcommit', 'set-tree' and 'commit-diff' commands. - + 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. - ++ +[verse] config key: svn.edit -l<num>:: --find-copies-harder:: - -Only used with the 'dcommit', 'set-tree' and 'commit-diff' commands. - -They are both passed directly to 'git-diff-tree'; see + Only used with the 'dcommit', 'set-tree' and 'commit-diff' commands. ++ +They are both passed directly to 'git diff-tree'; see linkgit:git-diff-tree[1] for more information. - ++ [verse] config key: svn.l config key: svn.findcopiesharder -A<filename>:: --authors-file=<filename>:: - -Syntax is compatible with the file used by 'git-cvsimport': - + Syntax is compatible with the file used by 'git cvsimport': ++ ------------------------------------------------------------------------ loginname = Joe User <user@example.com> ------------------------------------------------------------------------ - -If this option is specified and 'git-svn' encounters an SVN -committer name that does not exist in the authors-file, 'git-svn' ++ +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 +appropriate entry. Re-running the previous 'git svn' command after the authors-file is modified should continue operation. - ++ +[verse] config key: svn.authorsfile --authors-prog=<filename>:: - -If this option is specified, for each SVN committer name that does not -exist in the authors file, the given file is executed with the committer -name as the first argument. The program is expected to return a single -line of the form "Name <email>", which will be treated as if included in -the authors file. + If this option is specified, for each SVN committer name that + does not exist in the authors file, the given file is executed + with the committer name as the first argument. The program is + expected to return a single line of the form "Name <email>", + which will be treated as if included in the authors file. -q:: --quiet:: - Make 'git-svn' less verbose. Specify a second time to make it + Make 'git svn' less verbose. Specify a second time to make it even less verbose. --repack[=<n>]:: --repack-flags=<flags>:: - -These should help keep disk usage sane for large fetches -with many revisions. - + 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 'git-repack'. - ++ +--repack-flags are passed directly to 'git repack'. ++ [verse] config key: svn.repack config key: svn.repackflags @@ -431,41 +543,36 @@ config key: svn.repackflags --merge:: -s<strategy>:: --strategy=<strategy>:: - -These are only used with the 'dcommit' and 'rebase' commands. - -Passed directly to 'git-rebase' when using 'dcommit' if a -'git-reset' cannot be used (see 'dcommit'). + These are only used with the 'dcommit' and 'rebase' commands. ++ +Passed directly to 'git rebase' when using 'dcommit' if a +'git reset' cannot be used (see 'dcommit'). -n:: --dry-run:: - -This can be used with the 'dcommit', 'rebase', 'branch' and 'tag' -commands. - + This can be used with the 'dcommit', 'rebase', 'branch' and + 'tag' commands. ++ For 'dcommit', print out the series of git arguments that would show which diffs would be committed to SVN. - ++ For 'rebase', display the local branch associated with the upstream svn repository associated with the current branch and the URL of svn repository that will be fetched from. - ++ For 'branch' and 'tag', display the urls that will be used for copying when creating the branch or tag. --- ADVANCED OPTIONS ---------------- --- -i<GIT_SVN_ID>:: --id <GIT_SVN_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. + 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<remote name>:: --svn-remote <remote name>:: @@ -479,33 +586,30 @@ no longer require this switch as an argument. 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. - ++ +[verse] config key: svn.followparent --- CONFIG FILE-ONLY OPTIONS ------------------------ --- svn.noMetadata:: svn-remote.<name>.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 + 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 ++ +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.<name>.useSvmProps:: - -This allows 'git-svn' to re-map repository URLs and UUIDs from -mirrors created using SVN::Mirror (or svk) for metadata. - + 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 @@ -522,28 +626,34 @@ svn-remote.<name>.useSvnsyncprops:: svn-remote.<name>.rewriteRoot:: This allows users to create repositories from alternate - URLs. For example, an administrator could run 'git-svn' on the + URLs. For example, an administrator could run 'git svn' on the server locally (accessing via file://) but wish to distribute the repository with a public http:// or svn:// URL in the metadata so users of it will see the public URL. -svn.brokenSymlinkWorkaround:: -This disables potentially expensive checks to workaround broken symlinks -checked into SVN by broken clients. Set this option to "false" if you -track a SVN repository with many empty blobs that are not symlinks. -This option may be changed while "git-svn" is running and take effect on -the next revision fetched. If unset, git-svn assumes this option to be -"true". - --- +svn-remote.<name>.rewriteUUID:: + Similar to the useSvmProps option; this is for users who need + to remap the UUID manually. This may be useful in situations + where the original UUID is not available via either useSvmProps + or useSvnsyncProps. -Since the noMetadata, rewriteRoot, useSvnsyncProps and useSvmProps -options all affect the metadata generated and used by 'git-svn'; they +svn.brokenSymlinkWorkaround:: + This disables potentially expensive checks to workaround + broken symlinks checked into SVN by broken clients. Set this + option to "false" if you track a SVN repository with many + empty blobs that are not symlinks. This option may be changed + while 'git svn' is running and take effect on the next + revision fetched. If unset, 'git svn' assumes this option to + be "true". + +Since the noMetadata, rewriteRoot, rewriteUUID, useSvnsyncProps and useSvmProps +options all affect the metadata generated and used by 'git svn'; they *must* be set in the configuration file before any history is imported and these settings should never be changed once they are set. -Additionally, only one of these four options can be used per-svn-remote -section because they affect the 'git-svn-id:' metadata line. +Additionally, only one of these options can be used per svn-remote +section because they affect the 'git-svn-id:' metadata line, except +for rewriteRoot and rewriteUUID which can be used together. BASIC EXAMPLES @@ -556,7 +666,7 @@ Tracking and contributing to the trunk of a Subversion-managed project: git svn clone http://svn.example.com/project/trunk # Enter the newly cloned directory: cd trunk -# You should be on master branch, double-check with git-branch +# You should be on master branch, double-check with 'git branch' git branch # Do some work and commit locally to git: git commit ... @@ -587,12 +697,12 @@ Tracking and contributing to an entire Subversion-managed project # of dcommit/rebase/show-ignore should be the same as above. ------------------------------------------------------------------------ -The initial 'git-svn clone' can be quite time-consuming +The initial 'git svn clone' can be quite time-consuming (especially for large Subversion repositories). If multiple people (or one person with multiple machines) want to use -'git-svn' to interact with the same Subversion repository, you can -do the initial 'git-svn clone' to a repository on a server and -have each person clone that repository with 'git-clone': +'git svn' to interact with the same Subversion repository, you can +do the initial 'git svn clone' to a repository on a server and +have each person clone that repository with 'git clone': ------------------------------------------------------------------------ # Do the initial import on a server @@ -606,7 +716,7 @@ have each person clone that repository with 'git-clone': git fetch # Create a local branch from one of the branches just fetched git checkout -b master FETCH_HEAD -# Initialize git-svn locally (be sure to use the same URL and -T/-b/-t options as were used on server) +# Initialize 'git svn' locally (be sure to use the same URL and -T/-b/-t options as were used on server) git svn init http://svn.example.com/project # Pull the latest changes from Subversion git svn rebase @@ -615,7 +725,7 @@ have each person clone that repository with 'git-clone': REBASE VS. PULL/MERGE --------------------- -Originally, 'git-svn' recommended that the 'remotes/git-svn' branch be +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. @@ -623,14 +733,14 @@ pulled or merged from. This is because the author favored 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 svn rebase` to update your work branch instead of `git pull` or -`git merge`. `pull`/`merge' can cause non-linear history to be flattened +`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 can be cumbersome as a result. While 'git-svn' can track +with Subversion can be cumbersome as a result. While 'git svn' can track copy history (including branches and tags) for repositories adopting a standard layout, it cannot yet represent merge history that happened inside git back upstream to SVN users. Therefore it is advised that @@ -641,25 +751,35 @@ CAVEATS ------- For the sake of simplicity and interoperating with a less-capable system -(SVN), it is recommended that all 'git-svn' users clone, fetch and dcommit -directly from the SVN server, and avoid all 'git-clone'/'pull'/'merge'/'push' +(SVN), it is recommended that all 'git svn' users clone, fetch and dcommit +directly from the SVN server, and avoid all 'git clone'/'pull'/'merge'/'push' operations between git repositories and branches. The recommended method of exchanging code between git branches and users is -'git-format-patch' and 'git-am', or just 'dcommit'ing to the SVN repository. +'git format-patch' and 'git am', or just 'dcommit'ing to the SVN repository. -Running 'git-merge' or 'git-pull' is NOT recommended on a branch you +Running 'git merge' or 'git pull' is NOT recommended on a branch you plan to 'dcommit' from. Subversion does not represent merges in any reasonable or useful fashion; so users using Subversion cannot see any merges you've made. Furthermore, if you merge or pull from a git branch that is a mirror of an SVN branch, 'dcommit' may commit to the wrong branch. -'git-clone' does not clone branches under the refs/remotes/ hierarchy or -any 'git-svn' metadata, or config. So repositories created and managed with -using 'git-svn' should use 'rsync' for cloning, if cloning is to be done +If you do merge, note the following rule: 'git svn dcommit' will +attempt to commit on top of the SVN commit named in +------------------------------------------------------------------------ +git log --grep=^git-svn-id: --first-parent -1 +------------------------------------------------------------------------ +You 'must' therefore ensure that the most recent commit of the branch +you want to dcommit to is the 'first' parent of the merge. Chaos will +ensue otherwise, especially if the first parent is an older commit on +the same SVN branch. + +'git clone' does not clone branches under the refs/remotes/ hierarchy or +any 'git svn' metadata, or config. So repositories created and managed with +using 'git svn' should use 'rsync' for cloning, if cloning is to be done at all. -Since 'dcommit' uses rebase internally, any git branches you 'git-push' to +Since 'dcommit' uses rebase internally, any git branches you 'git push' to before 'dcommit' on will require forcing an overwrite of the existing ref on the remote repository. This is generally considered bad practice, see the linkgit:git-push[1] documentation for details. @@ -669,6 +789,16 @@ already dcommitted. It is considered bad practice to --amend commits you've already pushed to a remote repository for other users, and dcommit with SVN is analogous to that. +When using multiple --branches or --tags, 'git svn' does not automatically +handle name collisions (for example, if two branches from different paths have +the same name, or if a branch and a tag have the same name). In these cases, +use 'init' to set up your git repository then, before your first 'fetch', edit +the .git/config file so that the branches and tags are associated with +different name spaces. For example: + + branches = stable/*:refs/remotes/svn/stable/* + branches = debug/*:refs/remotes/svn/debug/* + BUGS ---- @@ -685,7 +815,7 @@ for git to detect them. CONFIGURATION ------------- -'git-svn' stores [svn-remote] configuration information in the +'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' @@ -706,7 +836,23 @@ Keep in mind that the '\*' (asterisk) wildcard of the local ref however the remote wildcard may be anywhere as long as it's an independent path component (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 'git-config'. +should be manually entered with a text-editor or using 'git config'. + +It is also possible to fetch a subset of branches or tags by using a +comma-separated list of names within braces. For example: + +------------------------------------------------------------------------ +[svn-remote "huge-project"] + url = http://server.org/svn + fetch = trunk/src:refs/remotes/trunk + branches = branches/{red,green}/src:refs/remotes/branches/* + tags = tags/{1.0,2.0}/src:refs/remotes/tags/* +------------------------------------------------------------------------ + +Note that git-svn keeps track of the highest revision in which a branch +or tag has appeared. If the subset of branches or tags is changed after +fetching, then .git/svn/.metadata must be manually edited to remove (or +reset) branches-maxRev and/or tags-maxRev as appropriate. SEE ALSO -------- |