diff options
author | Frederik Rietdijk <fridh@fridh.nl> | 2019-10-20 13:34:32 +0200 |
---|---|---|
committer | Frederik Rietdijk <fridh@fridh.nl> | 2019-10-20 13:35:04 +0200 |
commit | 16d733bbe58baa9e4dfd1912d13d7fdc59268212 (patch) | |
tree | 2f3c7c8da037ea2cb2fdaea101b62b947abb61cb /doc/functions | |
parent | efb55d2a42e1b047c65b1d125cc955df84f8e0af (diff) |
doc: move fetchers and trivial builders under builders
Diffstat (limited to 'doc/functions')
-rw-r--r-- | doc/functions/fetchers.xml | 148 | ||||
-rw-r--r-- | doc/functions/trivial-builders.xml | 79 |
2 files changed, 0 insertions, 227 deletions
diff --git a/doc/functions/fetchers.xml b/doc/functions/fetchers.xml deleted file mode 100644 index 369c1fb153eb..000000000000 --- a/doc/functions/fetchers.xml +++ /dev/null @@ -1,148 +0,0 @@ -<section xmlns="http://docbook.org/ns/docbook" - xmlns:xlink="http://www.w3.org/1999/xlink" - xmlns:xi="http://www.w3.org/2001/XInclude" - xml:id="sec-pkgs-fetchers"> - <title>Fetcher functions</title> - - <para> - When using Nix, you will frequently need to download source code and other files from the internet. Nixpkgs comes with a few helper functions that allow you to fetch fixed-output derivations in a structured way. - </para> - - <para> - The two fetcher primitives are <function>fetchurl</function> and <function>fetchzip</function>. Both of these have two required arguments, a URL and a hash. The hash is typically <literal>sha256</literal>, although many more hash algorithms are supported. Nixpkgs contributors are currently recommended to use <literal>sha256</literal>. This hash will be used by Nix to identify your source. A typical usage of fetchurl is provided below. - </para> - -<programlisting><![CDATA[ -{ stdenv, fetchurl }: - -stdenv.mkDerivation { - name = "hello"; - src = fetchurl { - url = "http://www.example.org/hello.tar.gz"; - sha256 = "1111111111111111111111111111111111111111111111111111"; - }; -} -]]></programlisting> - - <para> - The main difference between <function>fetchurl</function> and <function>fetchzip</function> is in how they store the contents. <function>fetchurl</function> will store the unaltered contents of the URL within the Nix store. <function>fetchzip</function> on the other hand will decompress the archive for you, making files and directories directly accessible in the future. <function>fetchzip</function> can only be used with archives. Despite the name, <function>fetchzip</function> is not limited to .zip files and can also be used with any tarball. - </para> - - <para> - <function>fetchpatch</function> works very similarly to <function>fetchurl</function> with the same arguments expected. It expects patch files as a source and and performs normalization on them before computing the checksum. For example it will remove comments or other unstable parts that are sometimes added by version control systems and can change over time. - </para> - - <para> - Other fetcher functions allow you to add source code directly from a VCS such as subversion or git. These are mostly straightforward names based on the name of the command used with the VCS system. Because they give you a working repository, they act most like <function>fetchzip</function>. - </para> - - <variablelist> - <varlistentry> - <term> - <literal>fetchsvn</literal> - </term> - <listitem> - <para> - Used with Subversion. Expects <literal>url</literal> to a Subversion directory, <literal>rev</literal>, and <literal>sha256</literal>. - </para> - </listitem> - </varlistentry> - <varlistentry> - <term> - <literal>fetchgit</literal> - </term> - <listitem> - <para> - Used with Git. Expects <literal>url</literal> to a Git repo, <literal>rev</literal>, and <literal>sha256</literal>. <literal>rev</literal> in this case can be full the git commit id (SHA1 hash) or a tag name like <literal>refs/tags/v1.0</literal>. - </para> - </listitem> - </varlistentry> - <varlistentry> - <term> - <literal>fetchfossil</literal> - </term> - <listitem> - <para> - Used with Fossil. Expects <literal>url</literal> to a Fossil archive, <literal>rev</literal>, and <literal>sha256</literal>. - </para> - </listitem> - </varlistentry> - <varlistentry> - <term> - <literal>fetchcvs</literal> - </term> - <listitem> - <para> - Used with CVS. Expects <literal>cvsRoot</literal>, <literal>tag</literal>, and <literal>sha256</literal>. - </para> - </listitem> - </varlistentry> - <varlistentry> - <term> - <literal>fetchhg</literal> - </term> - <listitem> - <para> - Used with Mercurial. Expects <literal>url</literal>, <literal>rev</literal>, and <literal>sha256</literal>. - </para> - </listitem> - </varlistentry> - </variablelist> - - <para> - A number of fetcher functions wrap part of <function>fetchurl</function> and <function>fetchzip</function>. They are mainly convenience functions intended for commonly used destinations of source code in Nixpkgs. These wrapper fetchers are listed below. - </para> - - <variablelist> - <varlistentry> - <term> - <literal>fetchFromGitHub</literal> - </term> - <listitem> - <para> - <function>fetchFromGitHub</function> expects four arguments. <literal>owner</literal> is a string corresponding to the GitHub user or organization that controls this repository. <literal>repo</literal> corresponds to the name of the software repository. These are located at the top of every GitHub HTML page as <literal>owner</literal>/<literal>repo</literal>. <literal>rev</literal> corresponds to the Git commit hash or tag (e.g <literal>v1.0</literal>) that will be downloaded from Git. Finally, <literal>sha256</literal> corresponds to the hash of the extracted directory. Again, other hash algorithms are also available but <literal>sha256</literal> is currently preferred. - </para> - </listitem> - </varlistentry> - <varlistentry> - <term> - <literal>fetchFromGitLab</literal> - </term> - <listitem> - <para> - This is used with GitLab repositories. The arguments expected are very similar to fetchFromGitHub above. - </para> - </listitem> - </varlistentry> - <varlistentry> - <term> - <literal>fetchFromBitbucket</literal> - </term> - <listitem> - <para> - This is used with BitBucket repositories. The arguments expected are very similar to fetchFromGitHub above. - </para> - </listitem> - </varlistentry> - <varlistentry> - <term> - <literal>fetchFromSavannah</literal> - </term> - <listitem> - <para> - This is used with Savannah repositories. The arguments expected are very similar to fetchFromGitHub above. - </para> - </listitem> - </varlistentry> - <varlistentry> - <term> - <literal>fetchFromRepoOrCz</literal> - </term> - <listitem> - <para> - This is used with repo.or.cz repositories. The arguments expected are very similar to fetchFromGitHub above. - </para> - </listitem> - </varlistentry> - </variablelist> -</section> diff --git a/doc/functions/trivial-builders.xml b/doc/functions/trivial-builders.xml deleted file mode 100644 index ae9f3a1b255d..000000000000 --- a/doc/functions/trivial-builders.xml +++ /dev/null @@ -1,79 +0,0 @@ -<section xmlns="http://docbook.org/ns/docbook" - xmlns:xlink="http://www.w3.org/1999/xlink" - xmlns:xi="http://www.w3.org/2001/XInclude" - xml:id="sec-trivial-builders"> - <title>Trivial builders</title> - - <para> - Nixpkgs provides a couple of functions that help with building derivations. The most important one, <function>stdenv.mkDerivation</function>, has already been documented above. The following functions wrap <function>stdenv.mkDerivation</function>, making it easier to use in certain cases. - </para> - - <variablelist> - <varlistentry> - <term> - <literal>runCommand</literal> - </term> - <listitem> - <para> - This takes three arguments, <literal>name</literal>, <literal>env</literal>, and <literal>buildCommand</literal>. <literal>name</literal> is just the name that Nix will append to the store path in the same way that <literal>stdenv.mkDerivation</literal> uses its <literal>name</literal> attribute. <literal>env</literal> is an attribute set specifying environment variables that will be set for this derivation. These attributes are then passed to the wrapped <literal>stdenv.mkDerivation</literal>. <literal>buildCommand</literal> specifies the commands that will be run to create this derivation. Note that you will need to create <literal>$out</literal> for Nix to register the command as successful. - </para> - <para> - An example of using <literal>runCommand</literal> is provided below. - </para> -<programlisting> -(import <nixpkgs> {}).runCommand "my-example" {} '' - echo My example command is running - - mkdir $out - - echo I can write data to the Nix store > $out/message - - echo I can also run basic commands like: - - echo ls - ls - - echo whoami - whoami - - echo date - date -'' -</programlisting> - </listitem> - </varlistentry> - <varlistentry> - <term> - <literal>runCommandCC</literal> - </term> - <listitem> - <para> - This works just like <literal>runCommand</literal>. The only difference is that it also provides a C compiler in <literal>buildCommand</literal>’s environment. To minimize your dependencies, you should only use this if you are sure you will need a C compiler as part of running your command. - </para> - </listitem> - </varlistentry> - <varlistentry> - <term> - <literal>writeTextFile</literal>, <literal>writeText</literal>, <literal>writeTextDir</literal>, <literal>writeScript</literal>, <literal>writeScriptBin</literal> - </term> - <listitem> - <para> - These functions write <literal>text</literal> to the Nix store. This is useful for creating scripts from Nix expressions. <literal>writeTextFile</literal> takes an attribute set and expects two arguments, <literal>name</literal> and <literal>text</literal>. <literal>name</literal> corresponds to the name used in the Nix store path. <literal>text</literal> will be the contents of the file. You can also set <literal>executable</literal> to true to make this file have the executable bit set. - </para> - <para> - Many more commands wrap <literal>writeTextFile</literal> including <literal>writeText</literal>, <literal>writeTextDir</literal>, <literal>writeScript</literal>, and <literal>writeScriptBin</literal>. These are convenience functions over <literal>writeTextFile</literal>. - </para> - </listitem> - </varlistentry> - <varlistentry> - <term> - <literal>symlinkJoin</literal> - </term> - <listitem> - <para> - This can be used to put many derivations into the same directory structure. It works by creating a new derivation and adding symlinks to each of the paths listed. It expects two arguments, <literal>name</literal>, and <literal>paths</literal>. <literal>name</literal> is the name used in the Nix store path for the created derivation. <literal>paths</literal> is a list of paths that will be symlinked. These paths can be to Nix store derivations or any other subdirectory contained within. - </para> - </listitem> - </varlistentry> - </variablelist> -</section> |