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git-remote-fd

File descriptor transport helper for Git

TLDR

Clone using file descriptors for input and output
$ git clone "fd::[fd-in],[fd-out]"
copy
Fetch using pre-opened file descriptor connections
$ git fetch "fd::17,18"
copy
Use a single file descriptor for both input and output
$ git fetch "fd::17"
copy

SYNOPSIS

git-remote-fd url

DESCRIPTION

git-remote-fd is a Git remote helper program that uses pre-opened file descriptors for communication instead of establishing its own connections. When a URL in the form `fd::in[,out]` is used, Git invokes this helper to transfer data over the specified file descriptors.If only one file descriptor is provided, it is used for both reading and writing. If two are given separated by a comma, the first is used for reading from the remote and the second for writing.This enables integration with connection brokers, process supervisors, or custom transport layers that manage connections externally. The file descriptors must be opened before invoking Git.

PARAMETERS

URL

fd:: URL in the format fd::in[,out].
in
File descriptor number for reading from the remote. If out is omitted, this descriptor is used for both directions.
out
File descriptor number for writing to the remote.

CAVEATS

This is an advanced, low-level feature. File descriptors must be pre-opened by the calling process. Not suitable for everyday Git workflows; primarily useful for embedding Git in applications that manage their own connections.

SEE ALSO

git-remote(1), git-remote-ext(1)

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