100 lines
5.4 KiB
Markdown
100 lines
5.4 KiB
Markdown
Git-annex supports a wide variety of workflows, a spectrum that ranges from
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completely automatic behavior where git-annex handles everything, through
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manual behavior where git-annex does only what you say when you tell it to,
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all the way down to internal behavior, where you have complete control and
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understand how everything is stored and exactly what changes are happening.
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I will proceed to summarize all of these. I will begin at the automatic
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end, hoping that this is most useful, and drill down to the low level
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approaches. Note, however, that this is the opposite order of how git-annex
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was developed. A list of workflows that started from manual,
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commandline usage would be much more intuitive, but you'd have to be
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willing to read the man page and wiki pages to get started, and that's
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pretty much what's already out there anyway.
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Note that for each of these levels of interaction, all the levels following
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will also work as well. So you can actually manually move annexed files
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around while the webapp is running, etc.
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# 1. [[git annex webapp|git-annex-webapp]]
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The [[`git annex webapp`|git-annex-webapp]] command launches a local web
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server which serves a graphical user interface and automatically manages
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git annex. It will attempt to guide you through the whole process and do
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everything for you. [[You do not even need to type the command.
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|assistant/quickstart]] This should be run on every machine that may
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produce file changes. When you move files into or out of your repository
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folder, git-annex should record the changes and automatically propagate
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them to other connected machines.
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# 2. [[git annex assistant|git-annex-assistant]] without the webapp
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You could call [[`git annex assistant`|git-annex-assistant]] the
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command-line version of the webapp, giving you more control over creating
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and connecting your repositories, and configuring how files are moved
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between them.
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The assistant, when running, will automatically watch for file changes and
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synchronize them to other repositories, but you must manually create the
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repositories and configure the rules for syncing. To create a repository,
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use `git init` and then [[`git annex init`|git-annex-init]], and then `git
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remote add` it to any other repositories. If you want more than one annex,
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you can add their paths to `~/.config/git-annex/autostart` if you would
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like them to automatically begin syncing when `git annex assistant
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--autostart` is run, perhaps on boot or login. You can configure rules for
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where files are copied using the repository setup commands such as [[git
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annex preferred-content|git-annex-preferred-content]] to configure
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[[content preferences|preferred content]] for what goes where, [[`git annex
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numcopies`|git-annex-numcopies]] for how many [[copies]] must be kept of
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each file, and [[`git config annex.largefiles`|tips/largefiles]] to define
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small files that should be stored straight in git; most of the settings are
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accessible in one place with [[`git annex vicfg`|git-annex-vicfg]].
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# 3. [[git annex watch|git-annex-watch]] without the assistant
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The [[`git annex watch`|git-annex-watch]] command is like the assistant but
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has no automatic network behavior, giving you complete control over when
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repositories are pushed and pulled, and when files are moved between
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systems. The local repository is watched, and any file changes are added to
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git-annex. In order to synchronize between repositories, you must run
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[[`git annex sync --content`|git-annex-sync]] in the repository with the
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changes, which will merge the git history and logs with your remotes, and
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automatically transfer files to match your preferred and required content
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expressions.
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# 4. No background processes
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This allows you to decide when and what files are annexed. In order to tell
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git-annex to manage files, you must [[`git annex add`|git-annex-add]] the
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files.
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# 5. Plain [[git annex sync|git-annex-sync]] without `--content`
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This gives you fine-grained control of where copies of your files are
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stored. [[`git annex sync`|git-annex-sync]] without `--content` tells
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git-annex to merge git histories, but it does not automatically transfer
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your large files between systems. To transfer files and directories, you
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can use [[`git annex get`|git-annex-get]], [[`git annex
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drop`|git-annex-drop]], [[`git annex move`|git-annex-move]], and [[`git
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annex copy`|git-annex-copy]]. Git-annex will not violate a required content
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expression or your numcopies setting unless you pass `--force`, so your
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files are still safe.
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# 6. Manual management of git history without the synchronizer
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This allows you to control precisely what is committed to git, what commit
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message is used, and how your history is merged between repositories. You
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must have an understanding of git, and run `git commit` after `git annex
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add` to store the change. You must manage the git history yourself, using
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`git pull` and `git push`, to synchronize repositories. You may freely use
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git normally side-by-side with git-annex.
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# 7. Manual management of git annex keys
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This gives you control of what and where git annex stores your files under
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the hood, and how they are associated with your working tree, rather than
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using the `git annex add` and `git annex get` commands which reference
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files automatically. Git-annex has a variety of plumbing commands listed in
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the [[man page|git-annex]] that let you directly store and retrieve data in
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an annex associated with your git repository, where every datafile is
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enumerated by a unique hashkey.
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