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Difference between revisions of "CVS2SVN"
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== The process == | == The process == | ||
To successfully fullfill the task I wrote several simple scripts. I had to do it in scripts, not manually, because restoration of connections is pretty long process, and I wanted to minimize the repository freeze time. So I | To successfully fullfill the task I wrote several simple scripts. I had to do it in scripts, not manually, because restoration of connections is pretty long process, and I wanted to minimize the repository freeze time. So first I modified the dump file locally, and later reapplied my changes to the fresh dump. Those scripts are intentionally kept simple and no error checking is performed. | ||
The whole dump takes over 1.4GB, so there is no way to edit the file directly. Hence I came up with | The whole dump takes over 1.4GB, so there is no way to edit the file directly. Hence I came up with a simple idea of extracting just those Revision numbers and Node-paths, so they could be later replaced in the original dump. | ||
=== automation-pass1. | === automation-pass1.sh === | ||
wget http://.../scummvm-cvsroot.tar.bz2 | wget http://.../scummvm-cvsroot.tar.bz2 | ||
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=== Manual editing === | === Manual editing === | ||
Now I opened the dump.nodes.in files in XEmacs and started to add those links. First, I searched it for the word 'delete' and studied each case. I had to consult files layout and CVS log messages to see | Now I opened the dump.nodes.in files in XEmacs and started to add those links. First, I searched it for the word 'delete' and studied each case. I had to consult files layout and CVS log messages to see if those files were simply killed or really moved or renamed. Due to fact that some files were really renamed, and there are name clashes between files in directories, it was not possible to fully automate the task, although big chunk of it could be scripted. | ||
So what I did is | So what I did is specified that Node-copyfrom-path: manually and left Node-copyfrom-rev blank. Then I recorded a simple macro in XEmacs, as that was quicker to do than writing yet another script. The macro was something like this: | ||
* It starts on Node-copyfrom-path line. | * It starts on Node-copyfrom-path line. | ||
* Put path | * Put path to yank buffer | ||
* Kill other windows | * Kill other windows | ||
* Split window (thus we have 2 views of buffer at the same place) | * Split window (thus we have 2 views of buffer at the same place) | ||
* Switch to another window | * Switch to another window | ||
* Search backwards contents of yank buffer | * Search backwards contents of the yank buffer | ||
With this I saw the revision number in another window. I doublechecked that this is the correct place and put that revision number to Node-copyfrom-rev field. However I didn't see any inconsistencies here, so I guess it could insert those numbers fully automatic. | With this I saw the revision number in another window. I doublechecked that this is the correct place and put that revision number to Node-copyfrom-rev field. However I didn't see any inconsistencies here, so I guess it could insert those numbers fully automatic. | ||
Resulting .nodes file | Resulting .nodes file had inserted lines marked with leading + like on example at the top of this document. | ||
=== automation-pass2. | === automation-pass2.sh === | ||
This one is simple. | This one is simple. It merges back those inserted lines and modifies all internal paths, so it will put all modules into separate directories of the SVN repository: | ||
perl merge-dump.pl scummvm.dump.nodes scummvm <scummvm.dump >scummvm.dump.new | perl merge-dump.pl scummvm.dump.nodes scummvm <scummvm.dump >scummvm.dump.new | ||
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} | } | ||
The second regexp here is tricky, since Node-copyfrom-path could contain either /trunk/scummvm/blah or trunk/scummvm/blah and we have to keep that leading slash | The second regexp here is tricky, since Node-copyfrom-path could contain either /trunk/scummvm/blah or trunk/scummvm/blah and we have to keep that leading slash if it is present. | ||
So after this stage the amount of data on disk doubles since we have both merged and non-merged dumps. I kept non-merged dumps, so pass2 could be redone without performing lengthy pass1 over again. | So after this stage the amount of data on the disk doubles since we have both merged and non-merged dumps. I kept non-merged dumps intact, so pass2 could be redone without performing lengthy pass1 over again. | ||
=== automation-pass3.sh === | === automation-pass3.sh === | ||
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== Final step == | == Final step == | ||
Last step is dump the repository, bzip it and upload to sf.net. Later SF.net added possibility to import an existing dump automagically, but at the time we performed the move, we had to submit a PR. | |||