46 lines
2.1 KiB
Markdown
46 lines
2.1 KiB
Markdown
I have a bunch of directory trees with large data files scattered over various computers and disk drives - they contain photos, videos, music, and so on. In many cases I initially copied one of these trees from one machine to another just as a cheap and dirty backup, and then made small modifications to both trees in ways I no longer remember. For example, I returned from a trip with a bunch of new photos, and then might have rotated some of them 90 degrees on one machine, and edited or renamed them on another.
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What I want to do now is use git-annex as a way of initially synchronising the trees, and then fully managing them on an ongoing basis. Note that the trees are *not* yet git repositories. In order to be able to detect straight-forward file renames, I believe that [[the SHA1 backend|tips/using_the_SHA1_backend]] probably makes the most sense.
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I've been playing around and arrived at the following setup procedure. For the sake of discussion, I assume that we have two trees `a` and `b` which live in the same directory referred to by `$td`, and that all large files end with the `.avi` suffix.
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# Setup git in 'a'.
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cd $td/a
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git init
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# Setup git-annex in 'a'.
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echo '* annex.backend=SHA1' > .gitattributes
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git add .gitattributes
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git commit -m'use SHA1 backend'
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git annex init
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# Annex all large files.
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find -name \*.avi | xargs git annex add
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git add .
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git commit -m'Initial import'
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# Setup git in 'b'.
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cd $td/b
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git clone -n $td/a new
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mv new/.git .
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rmdir new
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git reset # reset git index to b's wd - hangover from cloning from 'a'
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# Setup git-annex in 'b'.
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# This merges a's (origin's) git-annex branch into the local git-annex branch.
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git annex init
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# Annex all large files - because we're using SHA1 backend, some
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# should hash to the same keys as in 'a'.
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find -name \*.avi | xargs git annex add
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git add .
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git commit -m'Changes in b tree'
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git remote add a $td/a
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# Now pull changes in 'b' back to 'a'.
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cd $td/a
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git remote add b $td/b
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git pull b master
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This seems to work, but have I missed anything?
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