git-annex/doc/special_remotes/external.mdwn

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There are three ways to implement a new special remote:
1. Using the [[hook]] special remote to tell git-annex what commands
to run to store and retrieve data. This is the easiest way, and
is great for prototyping.
2. Writing it in Haskell and adding it to git-annex.
3. Writing a program in any language you like that speaks the
[[external_special_remote_protocol]].
This page is all about writing new external special remotes. It's not hard!
* All you need is to make a program with a name like `git-annex-remote-$bar`.
* Install it in PATH.
* When the user runs `git annex initremote foo type=external externaltype=$bar`,
it will use your program.
Here's a simple shell script example, which can easily be adapted
to run whatever commands you need. ([[download|example.sh]])
[[!inline raw=yes pages="special_remotes/external/example.sh"]]