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e3b4968f9c
Move git-p4import.py and Documentation/git-p4import.txt into a contrib/p4import directory. Add a README there directing people to contrib/fast-import/git-p4 as a better alternative. Signed-off-by: Sean Estabrooks <seanlkml@sympatico.ca> Signed-off-by: Junio C Hamano <gitster@pobox.com>
168 lines
4.7 KiB
Plaintext
168 lines
4.7 KiB
Plaintext
git-p4import(1)
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===============
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NAME
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----
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git-p4import - Import a Perforce repository into git
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SYNOPSIS
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--------
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[verse]
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`git-p4import` [-q|-v] [--notags] [--authors <file>] [-t <timezone>]
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<//p4repo/path> <branch>
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`git-p4import` --stitch <//p4repo/path>
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`git-p4import`
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DESCRIPTION
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-----------
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Import a Perforce repository into an existing git repository. When
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a <//p4repo/path> and <branch> are specified a new branch with the
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given name will be created and the initial import will begin.
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Once the initial import is complete you can do an incremental import
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of new commits from the Perforce repository. You do this by checking
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out the appropriate git branch and then running `git-p4import` without
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any options.
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The standard p4 client is used to communicate with the Perforce
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repository; it must be configured correctly in order for `git-p4import`
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to operate (see below).
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OPTIONS
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-------
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-q::
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Do not display any progress information.
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-v::
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Give extra progress information.
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\--authors::
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Specify an authors file containing a mapping of Perforce user
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ids to full names and email addresses (see Notes below).
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\--notags::
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Do not create a tag for each imported commit.
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\--stitch::
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Import the contents of the given perforce branch into the
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currently checked out git branch.
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\--log::
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Store debugging information in the specified file.
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-t::
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Specify that the remote repository is in the specified timezone.
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Timezone must be in the format "US/Pacific" or "Europe/London"
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etc. You only need to specify this once, it will be saved in
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the git config file for the repository.
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<//p4repo/path>::
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The Perforce path that will be imported into the specified branch.
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<branch>::
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The new branch that will be created to hold the Perforce imports.
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P4 Client
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---------
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You must make the `p4` client command available in your $PATH and
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configure it to communicate with the target Perforce repository.
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Typically this means you must set the "$P4PORT" and "$P4CLIENT"
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environment variables.
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You must also configure a `p4` client "view" which maps the Perforce
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branch into the top level of your git repository, for example:
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------------
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Client: myhost
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Root: /home/sean/import
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Options: noallwrite clobber nocompress unlocked modtime rmdir
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View:
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//public/jam/... //myhost/jam/...
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------------
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With the above `p4` client setup, you could import the "jam"
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perforce branch into a branch named "jammy", like so:
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------------
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$ mkdir -p /home/sean/import/jam
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$ cd /home/sean/import/jam
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$ git init
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$ git p4import //public/jam jammy
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------------
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Multiple Branches
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-----------------
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Note that by creating multiple "views" you can use `git-p4import`
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to import additional branches into the same git repository.
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However, the `p4` client has a limitation in that it silently
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ignores all but the last "view" that maps into the same local
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directory. So the following will *not* work:
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------------
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View:
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//public/jam/... //myhost/jam/...
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//public/other/... //myhost/jam/...
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//public/guest/... //myhost/jam/...
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------------
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If you want more than one Perforce branch to be imported into the
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same directory you must employ a workaround. A simple option is
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to adjust your `p4` client before each import to only include a
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single view.
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Another option is to create multiple symlinks locally which all
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point to the same directory in your git repository and then use
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one per "view" instead of listing the actual directory.
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Tags
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----
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A git tag of the form p4/xx is created for every change imported from
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the Perforce repository where xx is the Perforce changeset number.
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Therefore after the import you can use git to access any commit by its
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Perforce number, e.g. git show p4/327.
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The tag associated with the HEAD commit is also how `git-p4import`
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determines if there are new changes to incrementally import from the
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Perforce repository.
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If you import from a repository with many thousands of changes
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you will have an equal number of p4/xxxx git tags. Git tags can
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be expensive in terms of disk space and repository operations.
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If you don't need to perform further incremental imports, you
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may delete the tags.
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Notes
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-----
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You can interrupt the import (e.g. ctrl-c) at any time and restart it
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without worry.
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Author information is automatically determined by querying the
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Perforce "users" table using the id associated with each change.
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However, if you want to manually supply these mappings you can do
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so with the "--authors" option. It accepts a file containing a list
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of mappings with each line containing one mapping in the format:
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------------
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perforce_id = Full Name <email@address.com>
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------------
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Author
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------
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Written by Sean Estabrooks <seanlkml@sympatico.ca>
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GIT
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---
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Part of the gitlink:git[7] suite
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