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nixos: nixos/doc/manual/configuration/summary.xml to CommonMark
This commit is contained in:
Bobby Rong
parent
6122fb4123
commit
800c1f15a3
@ -21,4 +21,5 @@ xlink:href="https://nixos.org/nix/manual/#chap-writing-nix-expressions">Nix
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<xi:include href="../from_md/configuration/config-file.section.xml" />
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<xi:include href="../from_md/configuration/abstractions.section.xml" />
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<xi:include href="../from_md/configuration/modularity.section.xml" />
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<xi:include href="../from_md/configuration/summary.section.xml" />
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</chapter>
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46
nixos/doc/manual/configuration/summary.section.md
Normal file
46
nixos/doc/manual/configuration/summary.section.md
Normal file
@ -0,0 +1,46 @@
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# Syntax Summary {#sec-nix-syntax-summary}
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Below is a summary of the most important syntactic constructs in the Nix
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expression language. It's not complete. In particular, there are many
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other built-in functions. See the [Nix
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manual](https://nixos.org/nix/manual/#chap-writing-nix-expressions) for
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the rest.
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| Example | Description |
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|-----------------------------------------------|--------------------------------------------------------------------------------------------------------------------|
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| *Basic values* | |
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| `"Hello world"` | A string |
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| `"${pkgs.bash}/bin/sh"` | A string containing an expression (expands to `"/nix/store/hash-bash-version/bin/sh"`) |
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| `true`, `false` | Booleans |
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| `123` | An integer |
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| `./foo.png` | A path (relative to the containing Nix expression) |
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| *Compound values* | |
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| `{ x = 1; y = 2; }` | A set with attributes named `x` and `y` |
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| `{ foo.bar = 1; }` | A nested set, equivalent to `{ foo = { bar = 1; }; }` |
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| `rec { x = "foo"; y = x + "bar"; }` | A recursive set, equivalent to `{ x = "foo"; y = "foobar"; }` |
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| `[ "foo" "bar" ]` | A list with two elements |
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| *Operators* | |
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| `"foo" + "bar"` | String concatenation |
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| `1 + 2` | Integer addition |
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| `"foo" == "f" + "oo"` | Equality test (evaluates to `true`) |
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| `"foo" != "bar"` | Inequality test (evaluates to `true`) |
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| `!true` | Boolean negation |
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| `{ x = 1; y = 2; }.x` | Attribute selection (evaluates to `1`) |
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| `{ x = 1; y = 2; }.z or 3` | Attribute selection with default (evaluates to `3`) |
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| `{ x = 1; y = 2; } // { z = 3; }` | Merge two sets (attributes in the right-hand set taking precedence) |
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| *Control structures* | |
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| `if 1 + 1 == 2 then "yes!" else "no!"` | Conditional expression |
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| `assert 1 + 1 == 2; "yes!"` | Assertion check (evaluates to `"yes!"`). See [](#sec-assertions) for using assertions in modules |
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| `let x = "foo"; y = "bar"; in x + y` | Variable definition |
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| `with pkgs.lib; head [ 1 2 3 ]` | Add all attributes from the given set to the scope (evaluates to `1`) |
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| *Functions (lambdas)* | |
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| `x: x + 1` | A function that expects an integer and returns it increased by 1 |
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| `(x: x + 1) 100` | A function call (evaluates to 101) |
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| `let inc = x: x + 1; in inc (inc (inc 100))` | A function bound to a variable and subsequently called by name (evaluates to 103) |
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| `{ x, y }: x + y` | A function that expects a set with required attributes `x` and `y` and concatenates them |
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| `{ x, y ? "bar" }: x + y` | A function that expects a set with required attribute `x` and optional `y`, using `"bar"` as default value for `y` |
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| `{ x, y, ... }: x + y` | A function that expects a set with required attributes `x` and `y` and ignores any other attributes |
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| `{ x, y } @ args: x + y` | A function that expects a set with required attributes `x` and `y`, and binds the whole set to `args` |
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| *Built-in functions* | |
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| `import ./foo.nix` | Load and return Nix expression in given file |
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| `map (x: x + x) [ 1 2 3 ]` | Apply a function to every element of a list (evaluates to `[ 2 4 6 ]`) |
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@ -1,227 +0,0 @@
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<section xmlns="http://docbook.org/ns/docbook"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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xmlns:xi="http://www.w3.org/2001/XInclude"
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version="5.0"
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xml:id="sec-nix-syntax-summary">
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<title>Syntax Summary</title>
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<para>
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Below is a summary of the most important syntactic constructs in the Nix
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expression language. It’s not complete. In particular, there are many other
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built-in functions. See the
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<link
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xlink:href="https://nixos.org/nix/manual/#chap-writing-nix-expressions">Nix
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||||
manual</link> for the rest.
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</para>
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<informaltable frame='none'>
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<tgroup cols='2'>
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<colspec colname='c1' rowsep='1' colsep='1' />
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||||
<colspec colname='c2' rowsep='1' />
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<thead>
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||||
<row>
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<entry>Example</entry>
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||||
<entry>Description</entry>
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||||
</row>
|
||||
</thead>
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||||
<tbody>
|
||||
<row>
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<entry namest="c1" nameend="c2"><emphasis>Basic values</emphasis>
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||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>"Hello world"</literal>
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</entry>
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||||
<entry>A string</entry>
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||||
</row>
|
||||
<row>
|
||||
<entry><literal>"${pkgs.bash}/bin/sh"</literal>
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||||
</entry>
|
||||
<entry>A string containing an expression (expands to <literal>"/nix/store/<replaceable>hash</replaceable>-bash-<replaceable>version</replaceable>/bin/sh"</literal>)</entry>
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</row>
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<row>
|
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<entry><literal>true</literal>, <literal>false</literal>
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</entry>
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<entry>Booleans</entry>
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</row>
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<row>
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<entry><literal>123</literal>
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</entry>
|
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<entry>An integer</entry>
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</row>
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<row>
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<entry><literal>./foo.png</literal>
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</entry>
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<entry>A path (relative to the containing Nix expression)</entry>
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</row>
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<row>
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<entry namest="c1" nameend="c2"><emphasis>Compound values</emphasis>
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</entry>
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</row>
|
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<row>
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<entry><literal>{ x = 1; y = 2; }</literal>
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</entry>
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<entry>A set with attributes named <literal>x</literal> and <literal>y</literal>
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</entry>
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</row>
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<row>
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<entry><literal>{ foo.bar = 1; }</literal>
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</entry>
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<entry>A nested set, equivalent to <literal>{ foo = { bar = 1; }; }</literal>
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</entry>
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</row>
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<row>
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<entry><literal>rec { x = "foo"; y = x + "bar"; }</literal>
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</entry>
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<entry>A recursive set, equivalent to <literal>{ x = "foo"; y = "foobar"; }</literal>
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</entry>
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</row>
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<row>
|
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<entry><literal>[ "foo" "bar" ]</literal>
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</entry>
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<entry>A list with two elements</entry>
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</row>
|
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<row>
|
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<entry namest="c1" nameend="c2"><emphasis>Operators</emphasis>
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</entry>
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</row>
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<row>
|
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<entry><literal>"foo" + "bar"</literal>
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</entry>
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<entry>String concatenation</entry>
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</row>
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<row>
|
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<entry><literal>1 + 2</literal>
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</entry>
|
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<entry>Integer addition</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>"foo" == "f" + "oo"</literal>
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</entry>
|
||||
<entry>Equality test (evaluates to <literal>true</literal>)</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>"foo" != "bar"</literal>
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</entry>
|
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<entry>Inequality test (evaluates to <literal>true</literal>)</entry>
|
||||
</row>
|
||||
<row>
|
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<entry><literal>!true</literal>
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</entry>
|
||||
<entry>Boolean negation</entry>
|
||||
</row>
|
||||
<row>
|
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<entry><literal>{ x = 1; y = 2; }.x</literal>
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</entry>
|
||||
<entry>Attribute selection (evaluates to <literal>1</literal>)</entry>
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||||
</row>
|
||||
<row>
|
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<entry><literal>{ x = 1; y = 2; }.z or 3</literal>
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</entry>
|
||||
<entry>Attribute selection with default (evaluates to <literal>3</literal>)</entry>
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</row>
|
||||
<row>
|
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<entry><literal>{ x = 1; y = 2; } // { z = 3; }</literal>
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</entry>
|
||||
<entry>Merge two sets (attributes in the right-hand set taking precedence)</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry namest="c1" nameend="c2"><emphasis>Control structures</emphasis>
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||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>if 1 + 1 == 2 then "yes!" else "no!"</literal>
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</entry>
|
||||
<entry>Conditional expression</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>assert 1 + 1 == 2; "yes!"</literal>
|
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</entry>
|
||||
<entry>Assertion check (evaluates to <literal>"yes!"</literal>). See <xref
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linkend="sec-assertions"/> for using assertions in modules</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>let x = "foo"; y = "bar"; in x + y</literal>
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||||
</entry>
|
||||
<entry>Variable definition</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>with pkgs.lib; head [ 1 2 3 ]</literal>
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||||
</entry>
|
||||
<entry>Add all attributes from the given set to the scope
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(evaluates to <literal>1</literal>)</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry namest="c1" nameend="c2"><emphasis>Functions (lambdas)</emphasis>
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>x: x + 1</literal>
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||||
</entry>
|
||||
<entry>A function that expects an integer and returns it increased by 1</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>(x: x + 1) 100</literal>
|
||||
</entry>
|
||||
<entry>A function call (evaluates to 101)</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>let inc = x: x + 1; in inc (inc (inc 100))</literal>
|
||||
</entry>
|
||||
<entry>A function bound to a variable and subsequently called by name (evaluates to 103)</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>{ x, y }: x + y</literal>
|
||||
</entry>
|
||||
<entry>A function that expects a set with required attributes
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<literal>x</literal> and <literal>y</literal> and concatenates
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them</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>{ x, y ? "bar" }: x + y</literal>
|
||||
</entry>
|
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<entry>A function that expects a set with required attribute
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||||
<literal>x</literal> and optional <literal>y</literal>, using
|
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<literal>"bar"</literal> as default value for
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<literal>y</literal>
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>{ x, y, ... }: x + y</literal>
|
||||
</entry>
|
||||
<entry>A function that expects a set with required attributes
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<literal>x</literal> and <literal>y</literal> and ignores any
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||||
other attributes</entry>
|
||||
</row>
|
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<row>
|
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<entry><literal>{ x, y } @ args: x + y</literal>
|
||||
</entry>
|
||||
<entry>A function that expects a set with required attributes
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<literal>x</literal> and <literal>y</literal>, and binds the
|
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whole set to <literal>args</literal>
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry namest="c1" nameend="c2"><emphasis>Built-in functions</emphasis>
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>import ./foo.nix</literal>
|
||||
</entry>
|
||||
<entry>Load and return Nix expression in given file</entry>
|
||||
</row>
|
||||
<row>
|
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<entry><literal>map (x: x + x) [ 1 2 3 ]</literal>
|
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</entry>
|
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<entry>Apply a function to every element of a list (evaluates to <literal>[ 2 4 6 ]</literal>)</entry>
|
||||
</row>
|
||||
<!--
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<row>
|
||||
<entry><literal>throw "Urgh"</literal></entry>
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<entry>Raise an error condition</entry>
|
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</row>
|
||||
-->
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||||
</tbody>
|
||||
</tgroup>
|
||||
</informaltable>
|
||||
</section>
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332
nixos/doc/manual/from_md/configuration/summary.section.xml
Normal file
332
nixos/doc/manual/from_md/configuration/summary.section.xml
Normal file
@ -0,0 +1,332 @@
|
||||
<section xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xml:id="sec-nix-syntax-summary">
|
||||
<title>Syntax Summary</title>
|
||||
<para>
|
||||
Below is a summary of the most important syntactic constructs in the
|
||||
Nix expression language. It’s not complete. In particular, there are
|
||||
many other built-in functions. See the
|
||||
<link xlink:href="https://nixos.org/nix/manual/#chap-writing-nix-expressions">Nix
|
||||
manual</link> for the rest.
|
||||
</para>
|
||||
<informaltable>
|
||||
<tgroup cols="2">
|
||||
<colspec align="left" />
|
||||
<colspec align="left" />
|
||||
<thead>
|
||||
<row>
|
||||
<entry>
|
||||
Example
|
||||
</entry>
|
||||
<entry>
|
||||
Description
|
||||
</entry>
|
||||
</row>
|
||||
</thead>
|
||||
<tbody>
|
||||
<row>
|
||||
<entry>
|
||||
<emphasis>Basic values</emphasis>
|
||||
</entry>
|
||||
<entry>
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>"Hello world"</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
A string
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>"${pkgs.bash}/bin/sh"</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
A string containing an expression (expands to
|
||||
<literal>"/nix/store/hash-bash-version/bin/sh"</literal>)
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>true</literal>, <literal>false</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
Booleans
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>123</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
An integer
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>./foo.png</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
A path (relative to the containing Nix expression)
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<emphasis>Compound values</emphasis>
|
||||
</entry>
|
||||
<entry>
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>{ x = 1; y = 2; }</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
A set with attributes named <literal>x</literal> and
|
||||
<literal>y</literal>
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>{ foo.bar = 1; }</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
A nested set, equivalent to
|
||||
<literal>{ foo = { bar = 1; }; }</literal>
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>rec { x = "foo"; y = x + "bar"; }</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
A recursive set, equivalent to
|
||||
<literal>{ x = "foo"; y = "foobar"; }</literal>
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>[ "foo" "bar" ]</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
A list with two elements
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<emphasis>Operators</emphasis>
|
||||
</entry>
|
||||
<entry>
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>"foo" + "bar"</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
String concatenation
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>1 + 2</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
Integer addition
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>"foo" == "f" + "oo"</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
Equality test (evaluates to <literal>true</literal>)
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>"foo" != "bar"</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
Inequality test (evaluates to <literal>true</literal>)
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>!true</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
Boolean negation
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>{ x = 1; y = 2; }.x</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
Attribute selection (evaluates to <literal>1</literal>)
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>{ x = 1; y = 2; }.z or 3</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
Attribute selection with default (evaluates to
|
||||
<literal>3</literal>)
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>{ x = 1; y = 2; } // { z = 3; }</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
Merge two sets (attributes in the right-hand set taking
|
||||
precedence)
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<emphasis>Control structures</emphasis>
|
||||
</entry>
|
||||
<entry>
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>if 1 + 1 == 2 then "yes!" else "no!"</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
Conditional expression
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>assert 1 + 1 == 2; "yes!"</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
Assertion check (evaluates to
|
||||
<literal>"yes!"</literal>). See
|
||||
<xref linkend="sec-assertions" /> for using assertions in
|
||||
modules
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>let x = "foo"; y = "bar"; in x + y</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
Variable definition
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>with pkgs.lib; head [ 1 2 3 ]</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
Add all attributes from the given set to the scope
|
||||
(evaluates to <literal>1</literal>)
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<emphasis>Functions (lambdas)</emphasis>
|
||||
</entry>
|
||||
<entry>
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>x: x + 1</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
A function that expects an integer and returns it increased
|
||||
by 1
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>(x: x + 1) 100</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
A function call (evaluates to 101)
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>let inc = x: x + 1; in inc (inc (inc 100))</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
A function bound to a variable and subsequently called by
|
||||
name (evaluates to 103)
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>{ x, y }: x + y</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
A function that expects a set with required attributes
|
||||
<literal>x</literal> and <literal>y</literal> and
|
||||
concatenates them
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>{ x, y ? "bar" }: x + y</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
A function that expects a set with required attribute
|
||||
<literal>x</literal> and optional <literal>y</literal>,
|
||||
using <literal>"bar"</literal> as default value
|
||||
for <literal>y</literal>
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>{ x, y, ... }: x + y</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
A function that expects a set with required attributes
|
||||
<literal>x</literal> and <literal>y</literal> and ignores
|
||||
any other attributes
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>{ x, y } @ args: x + y</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
A function that expects a set with required attributes
|
||||
<literal>x</literal> and <literal>y</literal>, and binds the
|
||||
whole set to <literal>args</literal>
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<emphasis>Built-in functions</emphasis>
|
||||
</entry>
|
||||
<entry>
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>import ./foo.nix</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
Load and return Nix expression in given file
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>map (x: x + x) [ 1 2 3 ]</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
Apply a function to every element of a list (evaluates to
|
||||
<literal>[ 2 4 6 ]</literal>)
|
||||
</entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</informaltable>
|
||||
</section>
|
||||
Loading…
Reference in New Issue
Block a user