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diff --git a/contrib/fast-import/git-p4.txt b/contrib/fast-import/git-p4.txt deleted file mode 100644 index e09da44..0000000 --- a/contrib/fast-import/git-p4.txt +++ /dev/null @@ -1,215 +0,0 @@ -git-p4 - Perforce <-> Git converter using git-fast-import - -Usage -===== - -git-p4 can be used in two different ways: - -1) To import changes from Perforce to a Git repository, using "git-p4 sync". - -2) To submit changes from Git back to Perforce, using "git-p4 submit". - -Importing -========= - -Simply start with - - git-p4 clone //depot/path/project - -or - - git-p4 clone //depot/path/project myproject - -This will: - -1) Create an empty git repository in a subdirectory called "project" (or -"myproject" with the second command) - -2) Import the head revision from the given Perforce path into a git branch -called "p4" (remotes/p4 actually) - -3) Create a master branch based on it and check it out. - -If you want the entire history (not just the head revision) then you can simply -append a "@all" to the depot path: - - git-p4 clone //depot/project/main@all myproject - - - -If you want more control you can also use the git-p4 sync command directly: - - mkdir repo-git - cd repo-git - git init - git-p4 sync //path/in/your/perforce/depot - -This will import the current head revision of the specified depot path into a -"remotes/p4/master" branch of your git repository. You can use the ---branch=mybranch option to import into a different branch. - -If you want to import the entire history of a given depot path simply use: - - git-p4 sync //path/in/depot@all - - -Note: - -To achieve optimal compression you may want to run 'git repack -a -d -f' after -a big import. This may take a while. - -Incremental Imports -=================== - -After an initial import you can continue to synchronize your git repository -with newer changes from the Perforce depot by just calling - - git-p4 sync - -in your git repository. By default the "remotes/p4/master" branch is updated. - -Advanced Setup -============== - -Suppose you have a periodically updated git repository somewhere, containing a -complete import of a Perforce project. This repository can be cloned and used -with git-p4. When updating the cloned repository with the "sync" command, -git-p4 will try to fetch changes from the original repository first. The git -protocol used with this is usually faster than importing from Perforce -directly. - -This behaviour can be disabled by setting the "git-p4.syncFromOrigin" git -configuration variable to "false". - -Updating -======== - -A common working pattern is to fetch the latest changes from the Perforce depot -and merge them with local uncommitted changes. The recommended way is to use -git's rebase mechanism to preserve linear history. git-p4 provides a convenient - - git-p4 rebase - -command that calls git-p4 sync followed by git rebase to rebase the current -working branch. - -Submitting -========== - -git-p4 has support for submitting changes from a git repository back to the -Perforce depot. This requires a Perforce checkout separate from your git -repository. To submit all changes that are in the current git branch but not in -the "p4" branch (or "origin" if "p4" doesn't exist) simply call - - git-p4 submit - -in your git repository. If you want to submit changes in a specific branch that -is not your current git branch you can also pass that as an argument: - - git-p4 submit mytopicbranch - -You can override the reference branch with the --origin=mysourcebranch option. - -If a submit fails you may have to "p4 resolve" and submit manually. You can -continue importing the remaining changes with - - git-p4 submit --continue - -Example -======= - -# Clone a repository - git-p4 clone //depot/path/project -# Enter the newly cloned directory - cd project -# Do some work... - vi foo.h -# ... and commit locally to gi - git commit foo.h -# In the meantime somebody submitted changes to the Perforce depot. Rebase your latest -# changes against the latest changes in Perforce: - git-p4 rebase -# Submit your locally committed changes back to Perforce - git-p4 submit -# ... and synchronize with Perforce - git-p4 rebase - - -Configuration parameters -======================== - -git-p4.user ($P4USER) - -Allows you to specify the username to use to connect to the Perforce repository. - - git config [--global] git-p4.user public - -git-p4.password ($P4PASS) - -Allows you to specify the password to use to connect to the Perforce repository. -Warning this password will be visible on the command-line invocation of the p4 binary. - - git config [--global] git-p4.password public1234 - -git-p4.port ($P4PORT) - -Specify the port to be used to contact the Perforce server. As this will be passed -directly to the p4 binary, it may be in the format host:port as well. - - git config [--global] git-p4.port codes.zimbra.com:2666 - -git-p4.host ($P4HOST) - -Specify the host to contact for a Perforce repository. - - git config [--global] git-p4.host perforce.example.com - -git-p4.client ($P4CLIENT) - -Specify the client name to use - - git config [--global] git-p4.client public-view - -git-p4.allowSubmit - - git config [--global] git-p4.allowSubmit false - -git-p4.syncFromOrigin - -A useful setup may be that you have a periodically updated git repository -somewhere that contains a complete import of a Perforce project. That git -repository can be used to clone the working repository from and one would -import from Perforce directly after cloning using git-p4. If the connection to -the Perforce server is slow and the working repository hasn't been synced for a -while it may be desirable to fetch changes from the origin git repository using -the efficient git protocol. git-p4 supports this setup by calling "git fetch origin" -by default if there is an origin branch. You can disable this using: - - git config [--global] git-p4.syncFromOrigin false - -git-p4.useclientspec - - git config [--global] git-p4.useclientspec false - -The P4CLIENT environment variable should be correctly set for p4 to be -able to find the relevant client. This client spec will be used to -both filter the files cloned by git and set the directory layout as -specified in the client (this implies --keep-path style semantics). - -Implementation Details... -========================= - -* Changesets from Perforce are imported using git fast-import. -* The import does not require anything from the Perforce client view as it just uses - "p4 print //depot/path/file#revision" to get the actual file contents. -* Every imported changeset has a special [git-p4...] line at the - end of the log message that gives information about the corresponding - Perforce change number and is also used by git-p4 itself to find out - where to continue importing when doing incremental imports. - Basically when syncing it extracts the perforce change number of the - latest commit in the "p4" branch and uses "p4 changes //depot/path/...@changenum,#head" - to find out which changes need to be imported. -* git-p4 submit uses "git rev-list" to pick the commits between the "p4" branch - and the current branch. - The commits themselves are applied using git diff/format-patch ... | git apply - |