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annotate notes/metadata.txt @ 979:ce02baa04e53

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svn verify: print out diffs of bad files in a verbose mode
author Dan Villiom Podlaski Christiansen <danchr@gmail.com>
date Sun, 11 Nov 2012 15:31:19 +0100
parents ba801f44d240
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
134
22248b34b15a Add notes on how metadata is stored and recovered. Note that at this point,
Augie Fackler <durin42@gmail.com>
parents:
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1 Branches
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Augie Fackler <durin42@gmail.com>
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2 --------
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Augie Fackler <durin42@gmail.com>
parents:
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3 In order to handle branches that are not immediate children of /branches/, the
22248b34b15a Add notes on how metadata is stored and recovered. Note that at this point,
Augie Fackler <durin42@gmail.com>
parents:
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4 following information must be stored in the revmap:
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Augie Fackler <durin42@gmail.com>
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5
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Augie Fackler <durin42@gmail.com>
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6 revision path
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Augie Fackler <durin42@gmail.com>
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7
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Augie Fackler <durin42@gmail.com>
parents:
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8 Where path is the actual relative path of the branch in svn. An example, with
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Augie Fackler <durin42@gmail.com>
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9 the previous format for clarification:
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Augie Fackler <durin42@gmail.com>
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10 New | Old
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Augie Fackler <durin42@gmail.com>
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11 3 <hash> trunk | 3 <hash>
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Augie Fackler <durin42@gmail.com>
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12 4 <hash> branches/foo | 4 <hash> foo
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Augie Fackler <durin42@gmail.com>
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13
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Augie Fackler <durin42@gmail.com>
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14 Tags
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Augie Fackler <durin42@gmail.com>
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15 ----
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Augie Fackler <durin42@gmail.com>
parents:
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16 Note that if a tag is committed to, we can handle that case by making a branch
22248b34b15a Add notes on how metadata is stored and recovered. Note that at this point,
Augie Fackler <durin42@gmail.com>
parents:
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17 and then marking it as deleted. The revmap line would look something like this:
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Augie Fackler <durin42@gmail.com>
parents:
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18 10 <hash> tags/the_tag
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Augie Fackler <durin42@gmail.com>
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19 And the commit would be done on the hg branch 'modified-tag/the_tag'. Note that
22248b34b15a Add notes on how metadata is stored and recovered. Note that at this point,
Augie Fackler <durin42@gmail.com>
parents:
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20 if this was 'tags/releases/1.0.0', then the branch would be
22248b34b15a Add notes on how metadata is stored and recovered. Note that at this point,
Augie Fackler <durin42@gmail.com>
parents:
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21 'modified-tag/releases/1.0.0'.
22248b34b15a Add notes on how metadata is stored and recovered. Note that at this point,
Augie Fackler <durin42@gmail.com>
parents:
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22
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Augie Fackler <durin42@gmail.com>
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23 Detecting Closing of Branches
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Augie Fackler <durin42@gmail.com>
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24 -----------------------------
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Augie Fackler <durin42@gmail.com>
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25 Subversion users typically remove branches when done with them. This means that
22248b34b15a Add notes on how metadata is stored and recovered. Note that at this point,
Augie Fackler <durin42@gmail.com>
parents:
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26 if a commit performs a delete operation on the '' path inside a branch, we can
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Augie Fackler <durin42@gmail.com>
parents:
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27 be sure that the branch no longer exists. The branch should then be marked as
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Augie Fackler <durin42@gmail.com>
parents:
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28 inactive.
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29
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Augie Fackler <durin42@gmail.com>
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30 Closing Branches
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Augie Fackler <durin42@gmail.com>
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31 ----------------
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Augie Fackler <durin42@gmail.com>
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32 As of this writing, Mercurial marks branches as inactive by merging them so they
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Augie Fackler <durin42@gmail.com>
parents:
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33 have no active heads. In order to mark a branch as closed, the active head on
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parents:
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34 the branch will be used as the first parent of the new changeset, and the second
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Augie Fackler <durin42@gmail.com>
parents:
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35 changeset will be either the active head on the hg branch 'closed-branches' or
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parents:
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36 be the nullrev. The commit to mark the branch as inactive will happen on the
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parents:
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37 'closed-branches' branch in Mercurial.
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38
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39 Recovery
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40 --------
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41 hgsubversion stores several pieces of essential metadata in .hg/svn/. In order
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Augie Fackler <durin42@gmail.com>
parents:
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42 to rebuild this data, the key 'convert_revision' should be stored in the extra
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Augie Fackler <durin42@gmail.com>
parents:
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43 dictionary of the converted revision. The key should contain data in the format:
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Augie Fackler <durin42@gmail.com>
parents:
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44 'svn:<uuid>/abs/path@<rev>' where <uuid> is the repo UUID, /abs/path is the
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Augie Fackler <durin42@gmail.com>
parents:
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45 absolute path to the location the edits were made in Subversion (that is, if it
22248b34b15a Add notes on how metadata is stored and recovered. Note that at this point,
Augie Fackler <durin42@gmail.com>
parents:
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46 was a trunk commit on /foo/trunk, then /foo/trunk is what gets stored here, even
22248b34b15a Add notes on how metadata is stored and recovered. Note that at this point,
Augie Fackler <durin42@gmail.com>
parents:
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47 though the project root does not equal the repo root), and <rev> is the revision
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Augie Fackler <durin42@gmail.com>
parents:
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48 number of the change in Subversion. This key (and its contents) have been
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parents:
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49 chosen to be compatible with the convert extension so that repos originally
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Augie Fackler <durin42@gmail.com>
parents:
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50 converted to hg using convert can be maintained using hgsubversion if desired.
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parents:
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51
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52 Tags (tag_info) can be reconstructed by listing the tags directory and then
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53 running log on each tag to determine its parent changeset.
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Augie Fackler <durin42@gmail.com>
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54
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Augie Fackler <durin42@gmail.com>
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55 The last revision converted (last_rev) can be converted simply by using the
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Augie Fackler <durin42@gmail.com>
parents:
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56 highest revision number encountered while rebuilding the revision map.
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Augie Fackler <durin42@gmail.com>
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57
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58 The legacy tag_locations file does not need to be replaced - it will be
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parents:
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59 obsoleted as part of the long-term branch refactor.
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60
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61 The url will have to be provided by the user. The uuid can be re-requested from
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62 the repository.
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63
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64 branch_info can be rebuilt during the rebuild of the revision map by recording
155
ba801f44d240 utility_commands: Implement rebuildmeta so that metadata can be rebuilt.
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65 the revisions of all active heads of server-side branches. branch_info contains
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66 a map from branch: (parent_branch, parent_branch_rev, branch_created_rev)