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diff --git a/Documentation/git-cvsimport.txt b/Documentation/git-cvsimport.txt new file mode 100644 index 0000000000..41207a24b0 --- /dev/null +++ b/Documentation/git-cvsimport.txt @@ -0,0 +1,228 @@ +git-cvsimport(1) +================ + +NAME +---- +git-cvsimport - Salvage your data out of another SCM people love to hate + + +SYNOPSIS +-------- +[verse] +'git cvsimport' [-o <branch-for-HEAD>] [-h] [-v] [-d <CVSROOT>] + [-A <author-conv-file>] [-p <options-for-cvsps>] [-P <file>] + [-C <git_repository>] [-z <fuzz>] [-i] [-k] [-u] [-s <subst>] + [-a] [-m] [-M <regex>] [-S <regex>] [-L <commitlimit>] + [-r <remote>] [-R] [<CVS_module>] + + +DESCRIPTION +----------- +*WARNING:* `git cvsimport` uses cvsps version 2, which is considered +deprecated; it does not work with cvsps version 3 and later. If you are +performing a one-shot import of a CVS repository consider using +http://cvs2svn.tigris.org/cvs2git.html[cvs2git] or +https://github.com/BartMassey/parsecvs[parsecvs]. + +Imports a CVS repository into Git. It will either create a new +repository, or incrementally import into an existing one. + +Splitting the CVS log into patch sets is done by 'cvsps'. +At least version 2.1 is required. + +*WARNING:* for certain situations the import leads to incorrect results. +Please see the section <<issues,ISSUES>> for further reference. + +You should *never* do any work of your own on the branches that are +created by 'git cvsimport'. By default initial import will create and populate a +"master" branch from the CVS repository's main branch which you're free +to work with; after that, you need to 'git merge' incremental imports, or +any CVS branches, yourself. It is advisable to specify a named remote via +-r to separate and protect the incoming branches. + +If you intend to set up a shared public repository that all developers can +read/write, or if you want to use linkgit:git-cvsserver[1], then you +probably want to make a bare clone of the imported repository, +and use the clone as the shared repository. +See linkgit:gitcvs-migration[7]. + + +OPTIONS +------- +-v:: + Verbosity: let 'cvsimport' report what it is doing. + +-d <CVSROOT>:: + The root of the CVS archive. May be local (a simple path) or remote; + currently, only the :local:, :ext: and :pserver: access methods + are supported. If not given, 'git cvsimport' will try to read it + from `CVS/Root`. If no such file exists, it checks for the + `CVSROOT` environment variable. + +<CVS_module>:: + The CVS module you want to import. Relative to <CVSROOT>. + If not given, 'git cvsimport' tries to read it from + `CVS/Repository`. + +-C <target-dir>:: + The Git repository to import to. If the directory doesn't + exist, it will be created. Default is the current directory. + +-r <remote>:: + The Git remote to import this CVS repository into. + Moves all CVS branches into remotes/<remote>/<branch> + akin to the way 'git clone' uses 'origin' by default. + +-o <branch-for-HEAD>:: + When no remote is specified (via -r) the `HEAD` branch + from CVS is imported to the 'origin' branch within the Git + repository, as `HEAD` already has a special meaning for Git. + When a remote is specified the `HEAD` branch is named + remotes/<remote>/master mirroring 'git clone' behaviour. + Use this option if you want to import into a different + branch. ++ +Use '-o master' for continuing an import that was initially done by +the old cvs2git tool. + +-i:: + Import-only: don't perform a checkout after importing. This option + ensures the working directory and index remain untouched and will + not create them if they do not exist. + +-k:: + Kill keywords: will extract files with '-kk' from the CVS archive + to avoid noisy changesets. Highly recommended, but off by default + to preserve compatibility with early imported trees. + +-u:: + Convert underscores in tag and branch names to dots. + +-s <subst>:: + Substitute the character "/" in branch names with <subst> + +-p <options-for-cvsps>:: + Additional options for cvsps. + The options `-u` and '-A' are implicit and should not be used here. ++ +If you need to pass multiple options, separate them with a comma. + +-z <fuzz>:: + Pass the timestamp fuzz factor to cvsps, in seconds. If unset, + cvsps defaults to 300s. + +-P <cvsps-output-file>:: + Instead of calling cvsps, read the provided cvsps output file. Useful + for debugging or when cvsps is being handled outside cvsimport. + +-m:: + Attempt to detect merges based on the commit message. This option + will enable default regexes that try to capture the source + branch name from the commit message. + +-M <regex>:: + Attempt to detect merges based on the commit message with a custom + regex. It can be used with `-m` to enable the default regexes + as well. You must escape forward slashes. ++ +The regex must capture the source branch name in $1. ++ +This option can be used several times to provide several detection regexes. + +-S <regex>:: + Skip paths matching the regex. + +-a:: + Import all commits, including recent ones. cvsimport by default + skips commits that have a timestamp less than 10 minutes ago. + +-L <limit>:: + Limit the number of commits imported. Workaround for cases where + cvsimport leaks memory. + +-A <author-conv-file>:: + CVS by default uses the Unix username when writing its + commit logs. Using this option and an author-conv-file + maps the name recorded in CVS to author name, e-mail and + optional time zone: ++ +--------- + exon=Andreas Ericsson <ae@op5.se> + spawn=Simon Pawn <spawn@frog-pond.org> America/Chicago + +--------- ++ +'git cvsimport' will make it appear as those authors had +their GIT_AUTHOR_NAME and GIT_AUTHOR_EMAIL set properly +all along. If a time zone is specified, GIT_AUTHOR_DATE will +have the corresponding offset applied. ++ +For convenience, this data is saved to `$GIT_DIR/cvs-authors` +each time the '-A' option is provided and read from that same +file each time 'git cvsimport' is run. ++ +It is not recommended to use this feature if you intend to +export changes back to CVS again later with +'git cvsexportcommit'. + +-R:: + Generate a `$GIT_DIR/cvs-revisions` file containing a mapping from CVS + revision numbers to newly-created Git commit IDs. The generated file + will contain one line for each (filename, revision) pair imported; + each line will look like ++ +--------- +src/widget.c 1.1 1d862f173cdc7325b6fa6d2ae1cfd61fd1b512b7 +--------- ++ +The revision data is appended to the file if it already exists, for use when +doing incremental imports. ++ +This option may be useful if you have CVS revision numbers stored in commit +messages, bug-tracking systems, email archives, and the like. + +-h:: + Print a short usage message and exit. + +OUTPUT +------ +If `-v` is specified, the script reports what it is doing. + +Otherwise, success is indicated the Unix way, i.e. by simply exiting with +a zero exit status. + +[[issues]] +ISSUES +------ +Problems related to timestamps: + + * If timestamps of commits in the CVS repository are not stable enough + to be used for ordering commits changes may show up in the wrong + order. + * If any files were ever "cvs import"ed more than once (e.g., import of + more than one vendor release) the HEAD contains the wrong content. + * If the timestamp order of different files cross the revision order + within the commit matching time window the order of commits may be + wrong. + +Problems related to branches: + + * Branches on which no commits have been made are not imported. + * All files from the branching point are added to a branch even if + never added in CVS. + * This applies to files added to the source branch *after* a daughter + branch was created: if previously no commit was made on the daughter + branch they will erroneously be added to the daughter branch in git. + +Problems related to tags: + +* Multiple tags on the same revision are not imported. + +If you suspect that any of these issues may apply to the repository you +want to import, consider using cvs2git: + +* cvs2git (part of cvs2svn), `http://subversion.apache.org/` + +GIT +--- +Part of the linkgit:git[1] suite |