From 2142f47c0606aac6f0b66bc3fe25fe79fc85e7d8 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Sun, 14 Dec 2014 03:19:15 +0100
Subject: Add section on SSH substituter

---
 doc/manual/packages/copy-closure.xml | 50 ++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 doc/manual/packages/copy-closure.xml

(limited to 'doc/manual/packages/copy-closure.xml')

diff --git a/doc/manual/packages/copy-closure.xml b/doc/manual/packages/copy-closure.xml
new file mode 100644
index 000000000..5ec7896d8
--- /dev/null
+++ b/doc/manual/packages/copy-closure.xml
@@ -0,0 +1,50 @@
+<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</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 &lt; 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>
-- 
cgit v1.2.3