diff options
Diffstat (limited to 'doc/manual/nix-env.xml')
| -rw-r--r-- | doc/manual/nix-env.xml | 226 |
1 files changed, 224 insertions, 2 deletions
diff --git a/doc/manual/nix-env.xml b/doc/manual/nix-env.xml index 874f27081..70069fa1a 100644 --- a/doc/manual/nix-env.xml +++ b/doc/manual/nix-env.xml @@ -111,8 +111,9 @@ <listitem> <para> For the <option>--install</option>, - <option>--upgrade</option> and - <option>--uninstall</option> operations, this flag will + <option>--upgrade</option>, <option>--uninstall</option>, + <option>--switch-generation</option> and + <option>--rollback</option> operations, this flag will cause <command>nix-env</command> to print what <emphasis>would</emphasis> be done if this flag had not been specified, without actually doing it. @@ -594,4 +595,225 @@ foo-1.2.3</screen> </refsection> + + <!--######################################################################--> + + <refsection> + <title>Operation <option>--switch-profile</option></title> + + <refsection> + <title>Synopsis</title> + <cmdsynopsis> + <command>nix-env</command> + <group choice='req'> + <arg choice='plain'><option>--switch-profile</option></arg> + <arg choice='plain'><option>-S</option></arg> + </group> + <arg choice='req'><replaceable>path</replaceable></arg> + </cmdsynopsis> + </refsection> + + <refsection> + <title>Description</title> + + <para> + This operation makes <replaceable>path</replaceable> the + current profile for the user. That is, the symlink + <filename>~/.nix-profile</filename> is made to point to + <replaceable>path</replaceable>. + </para> + + </refsection> + + <refsection> + <title>Examples</title> + + <screen> +$ nix-env -S ~/my-profile</screen> + + </refsection> + + </refsection> + + + + <!--######################################################################--> + + <refsection> + <title>Operation <option>--list-generations</option></title> + + <refsection> + <title>Synopsis</title> + <cmdsynopsis> + <command>nix-env</command> + <arg choice='req'><option>--list-generations</option></arg> + </cmdsynopsis> + </refsection> + + <refsection> + <title>Description</title> + + <para> + This operation print a list of all the currently existing + generations for the active profile. These may be switched to + using the <option>--switch-generation</option> operation. It + also prints the creation date of the generation, and indicates + the current generation. + </para> + + </refsection> + + <refsection> + <title>Examples</title> + + <screen> +$ nix-env --list-generations + 95 2004-02-06 11:48:24 + 96 2004-02-06 11:49:01 + 97 2004-02-06 16:22:45 + 98 2004-02-06 16:24:33 (current)</screen> + + </refsection> + + </refsection> + + + + <!--######################################################################--> + + <refsection> + <title>Operation <option>--switch-generation</option></title> + + <refsection> + <title>Synopsis</title> + <cmdsynopsis> + <command>nix-env</command> + <group choice='req'> + <arg choice='plain'><option>--switch-generation</option></arg> + <arg choice='plain'><option>-G</option></arg> + </group> + <arg choice='req'><replaceable>generation</replaceable></arg> + </cmdsynopsis> + </refsection> + + <refsection> + <title>Description</title> + + <para> + This operation makes generation number + <replaceable>generation</replaceable> the current generation + of the active profile. That is, if the + <filename><replaceable>profile</replaceable></filename> is the + path to the active profile, then the symlink + <filename><replaceable>profile</replaceable></filename> is + made to point to + <filename><replaceable>profile</replaceable>-<replaceable>generation</replaceable>-link</filename>, + which is in turn a symlink to the actual user environment in + the Nix store. + </para> + + <para> + Switching will fail if the specified generation does not + exist. + </para> + + </refsection> + + <refsection> + <title>Examples</title> + + <screen> +$ nix-env -G 42 +switching from generation 50 to 42</screen> + + </refsection> + + </refsection> + + + + <!--######################################################################--> + + <refsection> + <title>Operation <option>--rollback</option></title> + + <refsection> + <title>Synopsis</title> + <cmdsynopsis> + <command>nix-env</command> + <arg choice='req'><option>--rollback</option></arg> + </cmdsynopsis> + </refsection> + + <refsection> + <title>Description</title> + + <para> + This operation switches to the <quote>previous</quote> + generation of the active profile, that is, the highest + numbered generation lower than the current generation, if it + exists. It is just a convenience wrapper around + <option>--list-generations</option> and + <option>--switch-generation</option>. + </para> + + </refsection> + + <refsection> + <title>Examples</title> + + <screen> +$ nix-env --rollback +switching from generation 92 to 91 + +$ nix-env --rolback +error: no generation older than the current (91) exists</screen> + + </refsection> + + </refsection> + + + + <!--######################################################################--> + + <refsection> + <title>Operation <option>--import</option></title> + + <refsection> + <title>Synopsis</title> + <cmdsynopsis> + <command>nix-env</command> + <group choice='req'> + <arg choice='plain'><option>--import</option></arg> + <arg choice='plain'><option>-I</option></arg> + </group> + <arg choice='req'><replaceable>path</replaceable></arg> + </cmdsynopsis> + </refsection> + + <refsection> + <title>Description</title> + + <para> + This operation makes <replaceable>path</replaceable> the + default active Nix expression for the user. That is, the + symlink <filename>~/.nix-userenv</filename> is made to point + to <replaceable>path</replaceable>. + </para> + + </refsection> + + <refsection> + <title>Examples</title> + + <screen> +$ nix-env -I ~/nixpkgs-0.5/</screen> + + </refsection> + + </refsection> + + + </refentry> |