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Diffstat (limited to 'Documentation/git-cvsimport.txt')
| -rw-r--r-- | Documentation/git-cvsimport.txt | 72 |
1 files changed, 62 insertions, 10 deletions
diff --git a/Documentation/git-cvsimport.txt b/Documentation/git-cvsimport.txt index b7a8c10b87..608cd63fc3 100644 --- a/Documentation/git-cvsimport.txt +++ b/Documentation/git-cvsimport.txt @@ -13,7 +13,7 @@ SYNOPSIS [-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>] [<CVS_module>] + [-r <remote>] [-R] [<CVS_module>] DESCRIPTION @@ -24,10 +24,13 @@ 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 +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 +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. @@ -46,13 +49,13 @@ OPTIONS -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 + 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 + If not given, 'git cvsimport' tries to read it from `CVS/Repository`. -C <target-dir>:: @@ -62,14 +65,14 @@ OPTIONS -r <remote>:: The git remote to import this CVS repository into. Moves all CVS branches into remotes/<remote>/<branch> - akin to the 'git-clone' "--use-separate-remote" option. + 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. + remotes/<remote>/master mirroring 'git clone' behaviour. Use this option if you want to import into a different branch. + @@ -142,17 +145,33 @@ This option can be used several times to provide several detection regexes. --------- + -'git-cvsimport' will make it appear as those authors had +'git cvsimport' will make it appear as those authors had their GIT_AUTHOR_NAME and GIT_AUTHOR_EMAIL set properly all along. + For convenience, this data is saved to `$GIT_DIR/cvs-authors` each time the '-A' option is provided and read from that same -file each time 'git-cvsimport' is run. +file each time 'git cvsimport' is run. + It is not recommended to use this feature if you intend to export changes back to CVS again later with -'git-cvsexportcommit'. +'git cvsexportcommit'. + +-R:: + Generate a `$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. @@ -164,6 +183,39 @@ 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 these alternative tools which proved to be +more stable in practice: + +* cvs2git (part of cvs2svn), `http://cvs2svn.tigris.org` +* parsecvs, `http://cgit.freedesktop.org/~keithp/parsecvs` Author ------ |