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annotate relnotes/5.8 @ 48792:8bbb1abb9d19

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tracked-file: rename the format option to use `use-` This is more consistent with the other options. Differential Revision: https://phab.mercurial-scm.org/D12200
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Thu, 17 Feb 2022 06:41:54 +0100
parents 32b527417ba3
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 == New Features ==
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2
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3 * `hg purge` is now a core command using `--confirm` by default.
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5 * The `rev-branch-cache` is now updated incrementally whenever changesets
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6 are added.
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7
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8 * The new options `experimental.bundlecompthreads` and
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9 `experimental.bundlecompthreads.<engine>` can be used to instruct
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10 the compression engines for bundle operations to use multiple threads
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11 for compression. The default is single threaded operation. Currently
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12 only supported for zstd.
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13
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14 == Default Format Change ==
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15
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16 These changes affects newly created repositories (or new clone) done with
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17 Mercurial 5.8.
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19 * The `ZSTD` compression will now be used by default for new repositories
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20 when available. This compression format was introduced in Mercurial 5.0,
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21 released in May 2019. See `hg help config.format.revlog-compression` for
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22 details.
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23
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24 * Mercurial installation built with the Rust parts will now use the
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25 "persistent nodemap" feature by default. This feature was introduced in
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26 Mercurial 5.4 (May 2020). However Mercurial instalation built without the
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27 fast Rust implementation will refuse to interract with them by default.
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28 This restriction can be lifted through configuration.
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29
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30 See `hg help config.format.use-persistent-nodemap` for details
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31
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32 == New Experimental Features ==
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33
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34 * There's a new `diff.merge` config option to show the changes
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35 relative to an automerge for merge changesets. This makes it
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36 easier to detect and review manual changes performed in merge
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37 changesets. It is supported by `hg diff --change`, `hg log -p`
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38 `hg incoming -p`, and `hg outgoing -p` so far.
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40
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41 == Bug Fixes ==
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42
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43 * gracefully recover from inconsistent persistent-nodemap data from disk.
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46 == Backwards Compatibility Changes ==
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48 * In normal repositories, the first parent of a changeset is not null,
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49 unless both parents are null (like the first changeset). Some legacy
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50 repositories violate this condition. The revlog code will now
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51 silentely swap the parents if this condition is tested. This can
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52 change the output of `hg log` when explicitly asking for first or
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53 second parent. The changesets "nodeid" are not affected.
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55
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56 == Internal API Changes ==
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57
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58 * `changelog.branchinfo` is deprecated and will be removed after 5.8.
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59 It is superseded by `changelogrevision.branchinfo`.
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61 * Callbacks for revlog.addgroup and the changelog._nodeduplicatecallback hook
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62 now get a revision number as argument instead of a node.
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64 * revlog.addrevision returns the revision number instead of the node.
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65
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66 * `nodes.nullid` and related constants are being phased out as part of
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67 the deprecation of SHA1. Repository instances and related classes
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68 provide access via `nodeconstants` and in some cases `nullid` attributes.