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GIT-P4(1)                         Git Manual                         GIT-P4(1)



NAME
       git-p4 - Import from and submit to Perforce repositories

SYNOPSIS
       git p4 clone [<sync options>] [<clone options>] <p4 depot path>...
       git p4 sync [<sync options>] [<p4 depot path>...]
       git p4 rebase
       git p4 submit [<submit options>] [<master branch name>]


DESCRIPTION
       This command provides a way to interact with p4 repositories using git.

       Create a new git repository from an existing p4 repository using git p4 clone, giving it one or more p4 depot
       paths. Incorporate new commits from p4 changes with git p4 sync. The sync command is also used to include new
       branches from other p4 depot paths. Submit git changes back to p4 using git p4 submit. The command git p4
       rebase does a sync plus rebases the current branch onto the updated p4 remote branch.

EXAMPLE
       ?   Clone a repository:

               $ git p4 clone //depot/path/project


       ?   Do some work in the newly created git repository:

               $ cd project
               $ vi foo.h
               $ git commit -a -m "edited foo.h"


       ?   Update the git repository with recent changes from p4, rebasing your work on top:

               $ git p4 rebase


       ?   Submit your commits back to p4:

               $ git p4 submit


COMMANDS
   Clone
       Generally, git p4 clone is used to create a new git directory from an existing p4 repository:

           $ git p4 clone //depot/path/project


       This:

        1. Creates an empty git repository in a subdirectory called project.

        2. Imports the full contents of the head revision from the given p4 depot path into a single commit in the git
           branch refs/remotes/p4/master.

        3. Creates a local branch, master from this remote and checks it out.

       To reproduce the entire p4 history in git, use the @all modifier on the depot path:

           $ git p4 clone //depot/path/project@all


   Sync
       As development continues in the p4 repository, those changes can be included in the git repository using:

           $ git p4 sync


       This command finds new changes in p4 and imports them as git commits.

       P4 repositories can be added to an existing git repository using git p4 sync too:

           $ mkdir repo-git
           $ cd repo-git
           $ git init
           $ git p4 sync //path/in/your/perforce/depot


       This imports the specified depot into refs/remotes/p4/master in an existing git repository. The --branch option
       can be used to specify a different branch to be used for the p4 content.

       If a git repository includes branches refs/remotes/origin/p4, these will be fetched and consulted first during
       a git p4 sync. Since importing directly from p4 is considerably slower than pulling changes from a git remote,
       this can be useful in a multi-developer environment.

   Rebase
       A common working pattern is to fetch the latest changes from the p4 depot and merge them with local uncommitted
       changes. Often, the p4 repository is the ultimate location for all code, thus a rebase workflow makes sense.
       This command does git p4 sync followed by git rebase to move local commits on top of updated p4 changes.

           $ git p4 rebase


   Submit
       Submitting changes from a git repository back to the p4 repository requires a separate p4 client workspace.
       This should be specified using the P4CLIENT environment variable or the git configuration variable
       git-p4.client. The p4 client must exist, but the client root will be created and populated if it does not
       already exist.

       To submit all changes that are in the current git branch but not in the p4/master branch, use:

           $ git p4 submit


       To specify a branch other than the current one, use:

           $ git p4 submit topicbranch


       The upstream reference is generally refs/remotes/p4/master, but can be overridden using the --origin=
       command-line option.

       The p4 changes will be created as the user invoking git p4 submit. The --preserve-user option will cause
       ownership to be modified according to the author of the git commit. This option requires admin privileges in
       p4, which can be granted using p4 protect.

OPTIONS
   General options
       All commands except clone accept these options.

       --git-dir <dir>
           Set the GIT_DIR environment variable. See git(1).

       --verbose
           Provide more progress information.

   Sync options
       These options can be used in the initial clone as well as in subsequent sync operations.

       --branch <branch>
           Import changes into given branch. If the branch starts with refs/, it will be used as is, otherwise the
           path refs/heads/ will be prepended. The default branch is master. If used with an initial clone, no HEAD
           will be checked out.

           This example imports a new remote "p4/proj2" into an existing git repository:

                   $ git init
                   $ git p4 sync --branch=refs/remotes/p4/proj2 //depot/proj2


       --detect-branches
           Use the branch detection algorithm to find new paths in p4. It is documented below in "BRANCH DETECTION".

       --changesfile <file>
           Import exactly the p4 change numbers listed in file, one per line. Normally, git p4 inspects the current p4
           repository state and detects the changes it should import.

       --silent
           Do not print any progress information.

       --detect-labels
           Query p4 for labels associated with the depot paths, and add them as tags in git. Limited usefulness as
           only imports labels associated with new changelists. Deprecated.

       --import-labels
           Import labels from p4 into git.

       --import-local
           By default, p4 branches are stored in refs/remotes/p4/, where they will be treated as remote-tracking
           branches by git-branch(1) and other commands. This option instead puts p4 branches in refs/heads/p4/. Note
           that future sync operations must specify --import-local as well so that they can find the p4 branches in
           refs/heads.

       --max-changes <n>
           Limit the number of imported changes to n. Useful to limit the amount of history when using the @all p4
           revision specifier.

       --keep-path
           The mapping of file names from the p4 depot path to git, by default, involves removing the entire depot
           path. With this option, the full p4 depot path is retained in git. For example, path
           //depot/main/foo/bar.c, when imported from //depot/main/, becomes foo/bar.c. With --keep-path, the git path
           is instead depot/main/foo/bar.c.

       --use-client-spec
           Use a client spec to find the list of interesting files in p4. See the "CLIENT SPEC" section below.

   Clone options
       These options can be used in an initial clone, along with the sync options described above.

       --destination <directory>
           Where to create the git repository. If not provided, the last component in the p4 depot path is used to
           create a new directory.

       --bare
           Perform a bare clone. See git-clone(1).

       -/ <path>
           Exclude selected depot paths when cloning.

   Submit options
       These options can be used to modify git p4 submit behavior.

       --origin <commit>
           Upstream location from which commits are identified to submit to p4. By default, this is the most recent p4
           commit reachable from HEAD.

       -M[<n>]
           Detect renames. See git-diff(1). Renames will be represented in p4 using explicit move operations. There is
           no corresponding option to detect copies, but there are variables for both moves and copies.

       --preserve-user
           Re-author p4 changes before submitting to p4. This option requires p4 admin privileges.

       --export-labels
           Export tags from git as p4 labels. Tags found in git are applied to the perforce working directory.

   Rebase options
       These options can be used to modify git p4 rebase behavior.

       --import-labels
           Import p4 labels.

DEPOT PATH SYNTAX
       The p4 depot path argument to git p4 sync and git p4 clone can be one or more space-separated p4 depot paths,
       with an optional p4 revision specifier on the end:

       "//depot/my/project"
           Import one commit with all files in the #head change under that tree.

       "//depot/my/project@all"
           Import one commit for each change in the history of that depot path.

       "//depot/my/project@1,6"
           Import only changes 1 through 6.

       "//depot/proj1@all //depot/proj2@all"
           Import all changes from both named depot paths into a single repository. Only files below these directories
           are included. There is not a subdirectory in git for each "proj1" and "proj2". You must use the
           --destination option when specifying more than one depot path. The revision specifier must be specified
           identically on each depot path. If there are files in the depot paths with the same name, the path with the
           most recently updated version of the file is the one that appears in git.

       See p4 help revisions for the full syntax of p4 revision specifiers.

CLIENT SPEC
       The p4 client specification is maintained with the p4 client command and contains among other fields, a View
       that specifies how the depot is mapped into the client repository. The clone and sync commands can consult the
       client spec when given the --use-client-spec option or when the useClientSpec variable is true. After git p4
       clone, the useClientSpec variable is automatically set in the repository configuration file. This allows future
       git p4 submit commands to work properly; the submit command looks only at the variable and does not have a
       command-line option.

       The full syntax for a p4 view is documented in p4 help views. Git p4 knows only a subset of the view syntax. It
       understands multi-line mappings, overlays with +, exclusions with - and double-quotes around whitespace. Of the
       possible wildcards, git p4 only handles ..., and only when it is at the end of the path. Git p4 will complain
       if it encounters an unhandled wildcard.

       Bugs in the implementation of overlap mappings exist. If multiple depot paths map through overlays to the same
       location in the repository, git p4 can choose the wrong one. This is hard to solve without dedicating a client
       spec just for git p4.

       The name of the client can be given to git p4 in multiple ways. The variable git-p4.client takes precedence if
       it exists. Otherwise, normal p4 mechanisms of determining the client are used: environment variable P4CLIENT, a
       file referenced by P4CONFIG, or the local host name.

BRANCH DETECTION
       P4 does not have the same concept of a branch as git. Instead, p4 organizes its content as a directory tree,
       where by convention different logical branches are in different locations in the tree. The p4 branch command is
       used to maintain mappings between different areas in the tree, and indicate related content. git p4 can use
       these mappings to determine branch relationships.

       If you have a repository where all the branches of interest exist as subdirectories of a single depot path, you
       can use --detect-branches when cloning or syncing to have git p4 automatically find subdirectories in p4, and
       to generate these as branches in git.

       For example, if the P4 repository structure is:

           //depot/main/...
           //depot/branch1/...


       And "p4 branch -o branch1" shows a View line that looks like:

           //depot/main/... //depot/branch1/...


       Then this git p4 clone command:

           git p4 clone --detect-branches //depot@all


       produces a separate branch in refs/remotes/p4/ for //depot/main, called master, and one for //depot/branch1
       called depot/branch1.

       However, it is not necessary to create branches in p4 to be able to use them like branches. Because it is
       difficult to infer branch relationships automatically, a git configuration setting git-p4.branchList can be
       used to explicitly identify branch relationships. It is a list of "source:destination" pairs, like a simple p4
       branch specification, where the "source" and "destination" are the path elements in the p4 repository. The
       example above relied on the presence of the p4 branch. Without p4 branches, the same result will occur with:

           git config git-p4.branchList main:branch1
           git p4 clone --detect-branches //depot@all


PERFORMANCE
       The fast-import mechanism used by git p4 creates one pack file for each invocation of git p4 sync. Normally,
       git garbage compression (git-gc(1)) automatically compresses these to fewer pack files, but explicit invocation
       of git repack -adf may improve performance.

CONFIGURATION VARIABLES
       The following config settings can be used to modify git p4 behavior. They all are in the git-p4 section.

   General variables
       git-p4.user
           User specified as an option to all p4 commands, with -u <user>. The environment variable P4USER can be used
           instead.

       git-p4.password
           Password specified as an option to all p4 commands, with -P <password>. The environment variable P4PASS can
           be used instead.

       git-p4.port
           Port specified as an option to all p4 commands, with -p <port>. The environment variable P4PORT can be used
           instead.

       git-p4.host
           Host specified as an option to all p4 commands, with -h <host>. The environment variable P4HOST can be used
           instead.

       git-p4.client
           Client specified as an option to all p4 commands, with -c <client>, including the client spec.

   Clone and sync variables
       git-p4.syncFromOrigin
           Because importing commits from other git repositories is much faster than importing them from p4, a
           mechanism exists to find p4 changes first in git remotes. If branches exist under refs/remote/origin/p4,
           those will be fetched and used when syncing from p4. This variable can be set to false to disable this
           behavior.

       git-p4.branchUser
           One phase in branch detection involves looking at p4 branches to find new ones to import. By default, all
           branches are inspected. This option limits the search to just those owned by the single user named in the
           variable.

       git-p4.branchList
           List of branches to be imported when branch detection is enabled. Each entry should be a pair of branch
           names separated by a colon (:). This example declares that both branchA and branchB were created from main:

               git config       git-p4.branchList main:branchA
               git config --add git-p4.branchList main:branchB


       git-p4.ignoredP4Labels
           List of p4 labels to ignore. This is built automatically as unimportable labels are discovered.

       git-p4.importLabels
           Import p4 labels into git, as per --import-labels.

       git-p4.labelImportRegexp
           Only p4 labels matching this regular expression will be imported. The default value is [a-zA-Z0-9_\-.]+$.

       git-p4.useClientSpec
           Specify that the p4 client spec should be used to identify p4 depot paths of interest. This is equivalent
           to specifying the option --use-client-spec. See the "CLIENT SPEC" section above. This variable is a
           boolean, not the name of a p4 client.

   Submit variables
       git-p4.detectRenames
           Detect renames. See git-diff(1).

       git-p4.detectCopies
           Detect copies. See git-diff(1).

       git-p4.detectCopiesHarder
           Detect copies harder. See git-diff(1).

       git-p4.preserveUser
           On submit, re-author changes to reflect the git author, regardless of who invokes git p4 submit.

       git-p4.allowMissingP4Users
           When preserveUser is true, git p4 normally dies if it cannot find an author in the p4 user map. This
           setting submits the change regardless.

       git-p4.skipSubmitEdit
           The submit process invokes the editor before each p4 change is submitted. If this setting is true, though,
           the editing step is skipped.

       git-p4.skipSubmitEditCheck
           After editing the p4 change message, git p4 makes sure that the description really was changed by looking
           at the file modification time. This option disables that test.

       git-p4.allowSubmit
           By default, any branch can be used as the source for a git p4 submit operation. This configuration
           variable, if set, permits only the named branches to be used as submit sources. Branch names must be the
           short names (no "refs/heads/"), and should be separated by commas (","), with no spaces.

       git-p4.skipUserNameCheck
           If the user running git p4 submit does not exist in the p4 user map, git p4 exits. This option can be used
           to force submission regardless.

       git-p4.attemptRCSCleanup
           If enabled, git p4 submit will attempt to cleanup RCS keywords ($Header$, etc). These would otherwise cause
           merge conflicts and prevent the submit going ahead. This option should be considered experimental at
           present.

       git-p4.exportLabels
           Export git tags to p4 labels, as per --export-labels.

       git-p4.labelExportRegexp
           Only p4 labels matching this regular expression will be exported. The default value is [a-zA-Z0-9_\-.]+$.

IMPLEMENTATION DETAILS
       ?   Changesets from p4 are imported using git fast-import.

       ?   Cloning or syncing does not require a p4 client; file contents are collected using p4 print.

       ?   Submitting requires a p4 client, which is not in the same location as the git repository. Patches are
           applied, one at a time, to this p4 client and submitted from there.

       ?   Each commit imported by git p4 has a line at the end of the log message indicating the p4 depot location
           and change number. This line is used by later git p4 sync operations to know which p4 changes are new.



Git 1.7.11.3                      08/29/2012                         GIT-P4(1)