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annotate mercurial/revlogutils/__init__.py @ 50896:b2b8c25f9462
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author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Wed, 30 Aug 2023 13:28:09 +0200 |
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1 # mercurial.revlogutils -- basic utilities for revlog |
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2 # |
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3 # Copyright 2019 Pierre-Yves David <pierre-yves.david@octobus.net> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
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6 # GNU General Public License version 2 or any later version. |
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7 |
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8 |
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9 from ..thirdparty import attr |
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10 from ..interfaces import repository |
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11 |
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12 # See mercurial.revlogutils.constants for doc |
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13 COMP_MODE_INLINE = 2 |
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14 RANK_UNKNOWN = -1 |
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15 |
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16 |
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17 def offset_type(offset, type): |
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18 if (type & ~repository.REVISION_FLAGS_KNOWN) != 0: |
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19 raise ValueError(b'unknown revlog index flags: %d' % type) |
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20 return int(int(offset) << 16 | type) |
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21 |
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22 |
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23 def entry( |
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24 data_offset, |
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25 data_compressed_length, |
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26 data_delta_base, |
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27 link_rev, |
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28 parent_rev_1, |
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29 parent_rev_2, |
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30 node_id, |
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31 flags=0, |
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32 data_uncompressed_length=-1, |
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33 data_compression_mode=COMP_MODE_INLINE, |
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34 sidedata_offset=0, |
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35 sidedata_compressed_length=0, |
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36 sidedata_compression_mode=COMP_MODE_INLINE, |
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37 rank=RANK_UNKNOWN, |
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38 ): |
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39 """Build one entry from symbolic name |
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40 |
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41 This is useful to abstract the actual detail of how we build the entry |
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42 tuple for caller who don't care about it. |
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43 |
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44 This should always be called using keyword arguments. Some arguments have |
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45 default value, this match the value used by index version that does not store such data. |
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46 """ |
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47 return ( |
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48 offset_type(data_offset, flags), |
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49 data_compressed_length, |
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50 data_uncompressed_length, |
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51 data_delta_base, |
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52 link_rev, |
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53 parent_rev_1, |
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54 parent_rev_2, |
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55 node_id, |
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56 sidedata_offset, |
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57 sidedata_compressed_length, |
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58 data_compression_mode, |
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59 sidedata_compression_mode, |
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60 rank, |
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61 ) |
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62 |
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63 |
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64 @attr.s(slots=True, frozen=True) |
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65 class revisioninfo: |
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66 """Information about a revision that allows building its fulltext |
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67 node: expected hash of the revision |
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68 p1, p2: parent revs of the revision |
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69 btext: built text cache consisting of a one-element list |
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70 cachedelta: (baserev, uncompressed_delta, usage_mode) or None |
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71 flags: flags associated to the revision storage |
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72 |
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73 One of btext[0] or cachedelta must be set. |
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74 """ |
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75 |
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76 node = attr.ib() |
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77 p1 = attr.ib() |
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78 p2 = attr.ib() |
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79 btext = attr.ib() |
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80 textlen = attr.ib() |
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81 cachedelta = attr.ib() |
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82 flags = attr.ib() |