forked from lix-project/lix
<simplesect> -> <section>
Pandoc silently ignores <simplesect>...
This commit is contained in:
Eelco Dolstra
parent
136fd55bb2
commit
ee05108472
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@ -6,7 +6,7 @@
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<title>Language Constructs</title>
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<simplesect><title>Recursive sets</title>
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<section><title>Recursive sets</title>
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<para>Recursive sets are just normal sets, but the attributes can
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refer to each other. For example,
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@ -38,10 +38,10 @@ does not terminate<footnote><para>Actually, Nix detects infinite
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recursion in this case and aborts (<quote>infinite recursion
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encountered</quote>).</para></footnote>.</para>
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</simplesect>
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</section>
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<simplesect xml:id="sect-let-expressions"><title>Let-expressions</title>
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<section xml:id="sect-let-expressions"><title>Let-expressions</title>
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<para>A let-expression allows you to define local variables for an
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expression. For instance,
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@ -56,10 +56,10 @@ evaluates to <literal>"foobar"</literal>.
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</para>
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</simplesect>
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</section>
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<simplesect><title>Inheriting attributes</title>
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<section><title>Inheriting attributes</title>
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<para>When defining a set or in a let-expression it is often convenient to copy variables
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from the surrounding lexical scope (e.g., when you want to propagate
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@ -129,10 +129,10 @@ a = src-set.a; b = src-set.b; c = src-set.c;
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when used while defining local variables in a let-expression or
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while defining a set.</para>
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</simplesect>
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</section>
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<simplesect xml:id="ss-functions"><title>Functions</title>
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<section xml:id="ss-functions"><title>Functions</title>
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<para>Functions have the following form:
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@ -248,10 +248,10 @@ in concat { x = "foo"; y = "bar"; }</programlisting>
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</para>
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</simplesect>
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</section>
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<simplesect><title>Conditionals</title>
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<section><title>Conditionals</title>
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<para>Conditionals look like this:
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@ -262,10 +262,10 @@ where <replaceable>e1</replaceable> is an expression that should
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evaluate to a Boolean value (<literal>true</literal> or
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<literal>false</literal>).</para>
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</simplesect>
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</section>
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<simplesect><title>Assertions</title>
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<section><title>Assertions</title>
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<para>Assertions are generally used to check that certain requirements
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on or between features and dependencies hold. They look like this:
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@ -349,11 +349,11 @@ stdenv.mkDerivation {
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</orderedlist>
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</simplesect>
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</section>
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<simplesect><title>With-expressions</title>
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<section><title>With-expressions</title>
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<para>A <emphasis>with-expression</emphasis>,
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@ -394,16 +394,16 @@ let a = 1; in let a = 2; in let a = 3; in let a = 4; in ...</programlisting>
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</para>
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</simplesect>
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</section>
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<simplesect><title>Comments</title>
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<section><title>Comments</title>
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<para>Comments can be single-line, started with a <literal>#</literal>
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character, or inline/multi-line, enclosed within <literal>/*
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... */</literal>.</para>
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</simplesect>
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</section>
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</section>
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@ -7,7 +7,7 @@
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<title>Values</title>
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<simplesect><title>Simple Values</title>
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<section><title>Simple Values</title>
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<para>Nix has the following basic data types:
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@ -193,10 +193,10 @@ stdenv.mkDerivation {
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</para>
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</simplesect>
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</section>
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<simplesect><title>Lists</title>
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<section><title>Lists</title>
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<para>Lists are formed by enclosing a whitespace-separated list of
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values between square brackets. For example,
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@ -217,10 +217,10 @@ function and the fifth being a set.</para>
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<para>Note that lists are only lazy in values, and they are strict in length.
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</para>
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</simplesect>
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</section>
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<simplesect><title>Sets</title>
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<section><title>Sets</title>
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<para>Sets are really the core of the language, since ultimately the
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Nix language is all about creating derivations, which are really just
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@ -307,7 +307,7 @@ a form of object-oriented programming, for example.
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</para>
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</simplesect>
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</section>
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</section>
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@ -30,7 +30,7 @@ arbitrary Nix expressions, they may not get pre-built
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binaries.</para></note>
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<simplesect>
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<section>
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<title>Setting up the build users</title>
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@ -52,10 +52,10 @@ This creates 10 build users. There can never be more concurrent builds
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than the number of build users, so you may want to increase this if
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you expect to do many builds at the same time.</para>
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</simplesect>
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</section>
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<simplesect>
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<section>
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<title>Running the daemon</title>
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@ -78,10 +78,10 @@ export NIX_REMOTE=daemon</programlisting>
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into the users’ login scripts.</para>
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</simplesect>
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</section>
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<simplesect>
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<section>
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<title>Restricting access</title>
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@ -101,7 +101,7 @@ cannot connect to the Unix domain socket
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<filename>/nix/var/nix/daemon-socket/socket</filename>, so they cannot
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perform Nix operations.</para>
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</simplesect>
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</section>
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</section>
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@ -25,7 +25,7 @@ of the package’s build dependency graph). This enables many powerful
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features.</para>
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<simplesect><title>Multiple versions</title>
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<section><title>Multiple versions</title>
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<para>You can have multiple versions or variants of a package
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installed at the same time. This is especially important when
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@ -39,10 +39,10 @@ uninstalling an application cannot break other applications, since
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these operations never “destructively” update or delete files that are
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used by other packages.</para>
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</simplesect>
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</section>
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<simplesect><title>Complete dependencies</title>
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<section><title>Complete dependencies</title>
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<para>Nix helps you make sure that package dependency specifications
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are complete. In general, when you’re making a package for a package
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@ -68,10 +68,10 @@ scanning binaries for the hash parts of Nix store paths (such as
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<literal>r8vvq9kq…</literal>). This sounds risky, but it works
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extremely well.</para>
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</simplesect>
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</section>
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<simplesect><title>Multi-user support</title>
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<section><title>Multi-user support</title>
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<para>Nix has multi-user support. This means that non-privileged
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users can securely install software. Each user can have a different
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@ -82,10 +82,10 @@ package won’t be built or downloaded a second time. At the same time,
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it is not possible for one user to inject a Trojan horse into a
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package that might be used by another user.</para>
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</simplesect>
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</section>
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<simplesect><title>Atomic upgrades and rollbacks</title>
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<section><title>Atomic upgrades and rollbacks</title>
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<para>Since package management operations never overwrite packages in
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the Nix store but just add new versions in different paths, they are
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@ -103,10 +103,10 @@ $ nix-env --upgrade <replaceable>some-packages</replaceable>
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$ nix-env --rollback
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</screen>
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</simplesect>
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</section>
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<simplesect><title>Garbage collection</title>
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<section><title>Garbage collection</title>
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<para>When you uninstall a package like this…
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@ -126,10 +126,10 @@ $ nix-collect-garbage
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This deletes all packages that aren’t in use by any user profile or by
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a currently running program.</para>
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</simplesect>
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</section>
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<simplesect><title>Functional package language</title>
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<section><title>Functional package language</title>
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<para>Packages are built from <emphasis>Nix expressions</emphasis>,
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which is a simple functional language. A Nix expression describes
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@ -145,10 +145,10 @@ function and call it any number of times with the appropriate
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arguments. Due to the hashing scheme, variants don’t conflict with
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each other in the Nix store.</para>
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</simplesect>
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</section>
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<simplesect><title>Transparent source/binary deployment</title>
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<section><title>Transparent source/binary deployment</title>
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<para>Nix expressions generally describe how to build a package from
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source, so an installation action like
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@ -172,31 +172,31 @@ Nix would first check if the file
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if so, fetch the pre-built binary referenced from there; otherwise, it
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would fall back to building from source.</para>
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</simplesect>
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</section>
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<!--
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<simplesect><title>Binary patching</title>
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<section><title>Binary patching</title>
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<para>In addition to downloading binaries automatically if they’re
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available, Nix can download binary deltas that patch an existing
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package in the Nix store into a new version. This speeds up
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upgrades.</para>
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</simplesect>
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</section>
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-->
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<simplesect><title>Nix Packages collection</title>
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<section><title>Nix Packages collection</title>
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<para>We provide a large set of Nix expressions containing hundreds of
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existing Unix packages, the <emphasis>Nix Packages
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collection</emphasis> (Nixpkgs).</para>
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</simplesect>
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</section>
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<simplesect><title>Managing build environments</title>
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<section><title>Managing build environments</title>
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<para>Nix is extremely useful for developers as it makes it easy to
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automatically set up the build environment for a package. Given a
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@ -232,17 +232,17 @@ specifications, Nix makes an excellent basis for <a
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href="[%root%]hydra">a continuous build system</a>.</para>
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-->
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</simplesect>
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</section>
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<simplesect><title>Portability</title>
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<section><title>Portability</title>
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<para>Nix runs on Linux and macOS.</para>
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</simplesect>
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</section>
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<simplesect><title>NixOS</title>
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<section><title>NixOS</title>
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<para>NixOS is a Linux distribution based on Nix. It uses Nix not
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just for package management but also to manage the system
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@ -253,16 +253,16 @@ earlier state. Also, users can install software without root
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privileges. For more information and downloads, see the <link
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xlink:href="http://nixos.org/">NixOS homepage</link>.</para>
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</simplesect>
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</section>
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<simplesect><title>License</title>
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<section><title>License</title>
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<para>Nix is released under the terms of the <link
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xlink:href="http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html">GNU
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LGPLv2.1 or (at your option) any later version</link>.</para>
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</simplesect>
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</section>
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</chapter>
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@ -1,5 +1,7 @@
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# Language Constructs
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## Recursive sets
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Recursive sets are just normal sets, but the attributes can refer to
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each other. For example,
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@ -24,6 +26,8 @@ example,
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does not terminate\[1\].
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## Let-expressions
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A let-expression allows you to define local variables for an expression.
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For instance,
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evaluates to `"foobar"`.
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## Inheriting attributes
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When defining a set or in a let-expression it is often convenient to
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copy variables from the surrounding lexical scope (e.g., when you want
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to propagate attributes). This can be shortened using the `inherit`
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@ -95,6 +101,8 @@ is equivalent to
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when used while defining local variables in a let-expression or while
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defining a set.
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## Functions
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Functions have the following form:
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pattern: body
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@ -187,6 +195,8 @@ you can bind them to an attribute, e.g.,
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let concat = { x, y }: x + y;
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in concat { x = "foo"; y = "bar"; }
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## Conditionals
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Conditionals look like this:
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if e1 then e2 else e3
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@ -194,6 +204,8 @@ Conditionals look like this:
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where e1 is an expression that should evaluate to a Boolean value
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(`true` or `false`).
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## Assertions
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Assertions are generally used to check that certain requirements on or
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between features and dependencies hold. They look like this:
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@ -257,6 +269,8 @@ The points of interest are:
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non-`null` value was passed. This prevents an unnecessary rebuild of
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Subversion if OpenSSL changes.
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## With-expressions
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A *with-expression*,
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with e1; e2
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@ -285,6 +299,8 @@ establishes the same scope as
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let a = 1; in let a = 2; in let a = 3; in let a = 4; in ...
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## Comments
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Comments can be single-line, started with a `#` character, or
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inline/multi-line, enclosed within `/*
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... */`.
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@ -1,5 +1,7 @@
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# Values
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## Simple Values
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Nix has the following basic data types:
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- *Strings* can be written in three ways.
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@ -127,6 +129,8 @@ Nix has the following basic data types:
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- The null value, denoted as `null`.
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## Lists
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Lists are formed by enclosing a whitespace-separated list of values
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between square brackets. For example,
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|
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@ -143,6 +147,8 @@ function and the fifth being a set.
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Note that lists are only lazy in values, and they are strict in length.
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## Sets
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Sets are really the core of the language, since ultimately the Nix
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language is all about creating derivations, which are really just sets
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of attributes to be passed to build scripts.
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|
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@ -20,6 +20,8 @@ Nix store/database that performs the operation.
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> caches. So while unprivileged users may install packages from
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> arbitrary Nix expressions, they may not get pre-built binaries.
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## Setting up the build users
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The *build users* are the special UIDs under which builds are performed.
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They should all be members of the *build users group* `nixbld`. This
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group should have no other members. The build users should not be
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@ -35,6 +37,8 @@ This creates 10 build users. There can never be more concurrent builds
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than the number of build users, so you may want to increase this if you
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expect to do many builds at the same time.
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## Running the daemon
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The [Nix daemon](#sec-nix-daemon) should be started as follows (as
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`root`):
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@ -50,6 +54,8 @@ should put a line like
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into the users’ login scripts.
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## Restricting access
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To limit which users can perform Nix operations, you can use the
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permissions on the directory `/nix/var/nix/daemon-socket`. For instance,
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if you want to restrict the use of Nix to the members of a group called
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|
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Loading…
Reference in a new issue