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Preserve metadata when staging a new version of an annexed file.

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Performance impact: When adding a large tree of new files, this needs
to do some git cat-file queries to check if any of the files already
existed and might need a metadata copy. I tried a benchmark in a copy
of my sound repository (so there was already a significant git tree
to check against.

Adding 10000 small files, with a cold cache:
  before: 1m48.539s
  after:  1m52.791s

So, impact is 0.0004 seconds per file added. Which seems acceptable, so did
not add some kind of configuration to enable/disable this.

This commit was sponsored by Lisa Feilen.
This commit is contained in:
Joey Hess 2014-02-24 14:41:33 -04:00
parent e7252cf192
commit 8d5158fa31
5 changed files with 41 additions and 14 deletions
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debian/changelog vendored
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@ -11,6 +11,7 @@ git-annex (5.20140222) UNRELEASED; urgency=medium
tag/showname.
* annex.genmetadata can be set to make git-annex automatically set
metadata (year and month) when adding files.
* Preserve metadata when staging a new version of an annexed file.
* metadata: Field names limited to alphanumerics and a few whitelisted
punctuation characters to avoid issues with views, etc.
* metadata: Support --json