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Document --check

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This commit is contained in:
Eelco Dolstra 2016-01-18 15:54:14 +01:00
parent 0824f40760
commit 71e5b937fb
1 changed files with 27 additions and 0 deletions
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27
doc/manual/command-ref/nix-store.xml
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@ -194,6 +194,25 @@ printed.)</para>
</varlistentry>
<varlistentry><term><option>--check</option></term>
<listitem><para>This option allows you to check whether a
derivation is deterministic. It rebuilds the specified derivation
and checks whether the result is bitwise-identical with the
existing outputs, printing an error if that’s not the case. The
outputs of the specified derivation must already exist. When used
with <option>-K</option>, if an output path is not identical to
the corresponding output from the previous build, the new output
path is left in
<filename>/nix/store/<replaceable>name</replaceable>-check.</filename></para>
<para>See also the <option>build-repeat</option> configuration
option, which repeats a derivation a number of times and prevents
its outputs from being registered as “valid” in the Nix store
unless they are identical.</para></listitem>
</varlistentry>
</variablelist>
</refsection>
@ -212,6 +231,14 @@ $ nix-store -r $(nix-instantiate ./test.nix)
This is essentially what <link
linkend="sec-nix-build"><command>nix-build</command></link> does.</para>
<para>To test whether a previously-built derivation is deterministic:
<screen>
$ nix-build -r '&lt;nixpkgs>' -A hello --check -K
</screen>
</para>
</refsection>