mirror of
https://github.com/privatevoid-net/nix-super.git
synced 2024-11-10 16:26:18 +02:00
50 lines
1.8 KiB
XML
50 lines
1.8 KiB
XML
<section xmlns="http://docbook.org/ns/docbook"
|
||
xmlns:xlink="http://www.w3.org/1999/xlink"
|
||
xmlns:xi="http://www.w3.org/2001/XInclude"
|
||
version="5.0"
|
||
xml:id="ssec-copy-closure">
|
||
|
||
<title>Copying Closures via SSH</title>
|
||
|
||
<para>The command <command
|
||
linkend="sec-nix-copy-closure">nix-copy-closure</command> copies a Nix
|
||
store path along with all its dependencies to or from another machine
|
||
via the SSH protocol. It doesn’t copy store paths that are already
|
||
present on the target machine. For example, the following command
|
||
copies Firefox with all its dependencies:
|
||
|
||
<screen>
|
||
$ nix-copy-closure --to alice@itchy.example.org $(type -p firefox)</screen>
|
||
|
||
See <xref linkend='sec-nix-copy-closure' /> for details.</para>
|
||
|
||
<para>With <command linkend='refsec-nix-store-export'>nix-store
|
||
--export</command> and <command
|
||
linkend='refsec-nix-store-import'>nix-store --import</command> you can
|
||
write the closure of a store path (that is, the path and all its
|
||
dependencies) to a file, and then unpack that file into another Nix
|
||
store. For example,
|
||
|
||
<screen>
|
||
$ nix-store --export $(nix-store -qR $(type -p firefox)) > firefox.closure</screen>
|
||
|
||
writes the closure of Firefox to a file. You can then copy this file
|
||
to another machine and install the closure:
|
||
|
||
<screen>
|
||
$ nix-store --import < firefox.closure</screen>
|
||
|
||
Any store paths in the closure that are already present in the target
|
||
store are ignored. It is also possible to pipe the export into
|
||
another command, e.g. to copy and install a closure directly to/on
|
||
another machine:
|
||
|
||
<screen>
|
||
$ nix-store --export $(nix-store -qR $(type -p firefox)) | bzip2 | \
|
||
ssh alice@itchy.example.org "bunzip2 | nix-store --import"</screen>
|
||
|
||
However, <command>nix-copy-closure</command> is generally more
|
||
efficient because it only copies paths that are not already present in
|
||
the target Nix store.</para>
|
||
|
||
</section>
|