Part -1: Who to bug If you have any problems with this conversion, please contact: matt@starnix.com no one else. cvs2p4 1.2.6 January 18, 2000. ==== INTRODUCTION This small set of tools provides a means for importing a CVS module into Perforce. It was developed for our use at Network Appliance, to convert our product source code revision history from CVS history into Perforce. As such it has sprouted some NetApp-specific features suited to our special needs, but I have made an attempt to make these unobtrusive to the general user. Basically, it is patterned at a high level after the PVCS to Perforce converter available on the Perforce web site, doing the following steps during a conversion: - Scans the CVS repository to generate a metadata file; - Scans the metadata file to identify groups of RCS revisions that comprise Perforce changes; - Imports the revisions/log history into a Perforce depot, by running p4 client commands against a Perforce server (this is driven by the output of the previous phase); - Finally, (and optionally), generates a map of RCS revisions and the Perforce changes they belong to. ==== MANIFEST After unpacking the distribution archive, use the MANIFEST script to verify that you have all of the pieces. The output should go something like this: rmg $ MANIFEST MANIFEST Artistic README NEWS bin/genmetadata bin/genchanges bin/dochanges bin/revmap lib/util.pl test/file,v test/config test/runtest test/norm test/metadata.good test/lines.good test/changes.good test/changes.good test/p4_changes_-l.good test/p4_describe.good All ok ==== REQUIREMENTS I've tested this all *only* in the following configuration: - conversion client machine: Sun UltraSparc running Solaris 2.6 (I'd expect Solaris 2.5 to be fine) - Perl 5.0 patch level 4 subversion 1, with working dbm support (i.e., dbmopen()/dbmclose() work). The scripts assume that perl will be found via $PATH. It must be a perl5! - RCS (actually, only the "co" command is used). Tested with RCS version 5.7. - Tested with p4 P4/SOLARIS/97.3/5047 (01/02/98) p4d P4/SOLARIS/97.3/5047 (01/02/98) p4 P4/SOLARIS/98.2/7068 (1998/07/31) p4d P4D/OSF/98.2/8102 (1998/10/16) *NOTE*: if you are using 97.3 or earlier, you should rename mv test/p4_describe.good test/p4_describe.good-r98.2 mv test/p4_describe.good-r97.3 test/p4_describe.good to avoid spurious reports of failure during the final diff when running the test cases provided with this distribution. The ability to spoof the actual checkin times and users depends on using Perforce version 97.3 or later. (Note: I've tended to run with both the server and the converter/client sides on the same host, but I am unaware of any requirement to do so; it should work if you want to use different hosts for each side). ==== WHAT IT DOES This converter will import a CVS module into Perforce, preserving the branching structure seen in the RCS ,v file in the CVS repository, and translating them into Perforce branches within the depot. As it stands, it will only import RCS branches up through the highest numbered revisions on branches that have branch tags referring to them; thus, it will not necessarily bring *every* revision in the CVS module into Perforce, but *will* bring in every revision leading up to the current revision for every branch it imports. I think this is what most people will want; if not, hack away. Like the RCS -> Perforce converter available on the Perforce web site, it applies heuristics to try and identify multiple changes in CVS that are highly likely to comprise what would be seen as a single change in Perforce, and does commit them as a single Perforce change. (The heuristics are: checked in by the same user, proximal in time, and bearing an identical log message). It deals OK with files that are dead on the CVS trunk (I.e., where the RCS ,v files are in the "Attic/". The "UI" for the converter is not very slick, but for most people it's a one-time kind of tool anyway. Feel free to improve it if you are so inclined. In general, I would call this "hackware"; I'm doing this minimal stab at documenting it, and then giving it away, in hopes that somebody will find it useful (Or perhaps only entertaining :-). ==== TESTING I have included a *very* rudimentary automated test "suite", in the test/ directory. You can use this to verify that it seems to work in your environment. To run it: 1. Set up a virgin Perforce server; 2. If you're going to run the client side of the converter as some other user than the one you used to set up the server in step (1)., use "p4 protect", and grant p4 superuser privileges to the user who will be running the client side of the converter. 3. Edit test/config, and change the lines # p4 command location (If other than "/usr/local/bin/p4") # $P4 = "/u/p4/VERS/bin.solaris/p4"; # Perforce server we're using. # $P4PORT = "cranford:1668"; to reflect the actual location of your "p4" command and the server hostname and port that you are using. 4. Run the tests with test/runtest This should run all of the conversion scripts on the test CVS module (well, file - it's a one-file module!), and then verify a few things by querying the Perforce server after the conversion is complete. If everything goes well, the end of the output should be something like: SUBMITR->:Change 22 updated. runtest> /u/p4/VERS/bin.solaris/p4 changes -l | /n/makita/... runtest> /u/p4/VERS/bin.solaris/p4 describe 1 2 3 4 5 6 7 ... runtest: ok In this version, the converted CVS "module" consists of a single file, but it does have a carefully constructed branching structure, intended to verify that the converter does the right stuff with respect to branching. ==== USAGE 1. Make a directory to hold all the glop for the importation, and create a config file, starting with test/config as a template: $ mkdir convdir; cp test/config convdir Edit the convdir/config file to reflect your locale and intent. (See the comments in the config file). 2. Set up a virgin Perforce server (well, it doesn't have to be a virgin, I guess, and if there's no volcano, then why bother?) Make sure P4PORT in the config file is set to the hostname:port for this server. As described in the prep for running the tests, above, use "p4 protect" if required, to grant the user who will be running the conversion scripts Perforce superuser privileges. 3. Run bin/genmetadata: It takes a single argument - the name of the directory where the "config" file resides. (It will create all intermediate, temp, and working files under this directory. By the end of the entire process, this will include a tree with the same topology as what you end up with in the imported depot, so, if you're converting a big repository, you might need considerable space in this directory). $ bin/genmetadata convdir genmetadata: rm -rf convdir/logmsgs.dir convdir/logmsgs.pag ... . . (filenames of each file in the CVS module, as they are scanned) . ===== Lines referenced: chupa curly ha <- a list of branch tags encountered in the scan; larry also saved to convdir/lines. shemp xxx This reads cvsdir/config to get its marching orders, then scans the CVS module for all ,v and Attic/,v files, creating: convdir/metadata <- the extracted RCS/CVS metadata convdir/logmsgs.pag <- An ndbm database convdir/logmsgs.dir <- of the log messages convdir/lines <- A list of "codelines" (== branch tags) At this point, you may want to look at the list of branch tags encountered, (which was written to convdir/lines), edit the config file, setting WANTLINES to 1, and filling in the "< -l " as the user, and from the host, which is going to run "dochanges". E.g., Let's say I'm running the p4 server on host "cranford", under login name "p4", and running "dochanges" as "rmg" on host "turok". Then user "rmg" on turok must be able to run "rsh cranford -l p4 ". Typically, this will require an entry in ~p4/.rhosts on "cranford", with a line of the form "turok rmg". You can avoid all of this rigamarole by running with CHECKPOINT_INTERVAL set to 0, or by runnig the converter and the p4d on the same host as the same user. [At this time running with CHECKPOINT_INTERVAL *other* than 0 is useless anyway, as the "recover from checkpoint" stuff hasn't been implemented yet!] Finally, you might want to save a copy of the output with "tee". The output will look something like: $ bin/dochanges T 2>&1 | tee bin/dochanges.out dochanges: /bin/rm -rf /n/makita/users/rmg/proj/cvs2p4/convdir/p4 dochanges: /u/p4/VERS/bin.solaris/p4 client -d dochanges Client 'dochanges' doesn't exist. dochanges: *** "/u/p4/VERS/bin.solaris/p4 client -d dochanges" ... Client dochanges saved. ========== change group 0 rmg 971112190556 Tmodule/convdir/1.1 Exp shemp - === deletes ===adds/edits=== dochanges: /u/p4/VERS/bin.solaris/p4 files /n/makita/users/rmg/... dochanges: /usr/local/bin/co -p1.1 Tmodule/T,v >/n/makita/users... Tmodule/T,v --> standard output revision 1.1 dochanges: /u/p4/VERS/bin.solaris/p4 add -t ktext /n/makita/use... //depoconvdir/ontap/trunk/T#1 - opened for add dochanges: ...| /u/p4/VERS/bin.solaris/p4 submit -i >/tmp/p4_su... SUBMITR->:Change 1 created with 1 open file(s). SUBMITR->:Submitting change 1. SUBMITR->:Locking 1 files ... SUBMITR->:add //depoconvdir/ontap/trunk/T#1 SUBMITR->://depoconvdir/ontap/trunk/T#1 - refreshing SUBMITR->:Change 1 submitted. dochanges: ...| /u/p4/VERS/bin.solaris/p4 change -i -f >/tmp/p4... SUBMITR->:Change 1 updated. ===branches=== ========== change group 1 . . . (Extremely voluminous output. You may want to tweak the . scripts to recduce it if you're tight on disk space . and tee'ing the output! . Basically, that's it. When this command finishes, your CVS module has been imported to Perforce. It make take a while. Converting our product source (=~ 4400 ,v files, and 16000 individual Perforce changes) takes something like 16 hours. But hey, that represents over 5 years of checkins to CVS!... 6. If you want the RCS revision-to-Perforce change map, run: $ bin/revmap convdir 3.2.2.2.2.1 18 1.2.2.1.2.2 15 1.2.2.1.2.1 14 3.3.4.1 19 3.2.2.2 17 3.2.2.1 16 1.2.2.2 13 1.2.2.1 11 3.5 20 3.4 9 3.3 7 3.2 5 3.1 4 1.2 2 1.1 1 I.e., the 1.2.2.1.2.1 rev of ,v was imported to Perforce as part of Perforce change #14. (I don't have it making the RCS -> file#rev map yet, so to get that you need to indirect throught what "p4 change -n N" tells you). ==== SUPPORT I can make absolutely no warranty that this will be helpful or even nontoxic for you, nor any promise of support. I may deny that I know anything about these tools. On the other hand, I will probably be happy to act as a collector of bug reports, and *may* be able to offer some help if you run into problems. Can't hurt to ask... Richard Geiger - rmg@netapp.com January, 1998 (revised January 2000, release 1.2.6)