177 lines
4.9 KiB
XML
177 lines
4.9 KiB
XML
<section xmlns="http://docbook.org/ns/docbook"
|
|
xmlns:xlink="http://www.w3.org/1999/xlink"
|
|
xml:id="sec-language-go">
|
|
|
|
<title>Go</title>
|
|
|
|
<para>The function <varname>buildGoPackage</varname> builds
|
|
standard Go programs.
|
|
</para>
|
|
|
|
<example xml:id='ex-buildGoPackage'><title>buildGoPackage</title>
|
|
<programlisting>
|
|
deis = buildGoPackage rec {
|
|
name = "deis-${version}";
|
|
version = "1.13.0";
|
|
|
|
goPackagePath = "github.com/deis/deis"; <co xml:id='ex-buildGoPackage-1' />
|
|
subPackages = [ "client" ]; <co xml:id='ex-buildGoPackage-2' />
|
|
|
|
src = fetchFromGitHub {
|
|
owner = "deis";
|
|
repo = "deis";
|
|
rev = "v${version}";
|
|
sha256 = "1qv9lxqx7m18029lj8cw3k7jngvxs4iciwrypdy0gd2nnghc68sw";
|
|
};
|
|
|
|
goDeps = ./deps.json; <co xml:id='ex-buildGoPackage-3' />
|
|
|
|
buildFlags = "--tags release"; <co xml:id='ex-buildGoPackage-4' />
|
|
}
|
|
</programlisting>
|
|
</example>
|
|
|
|
<para><xref linkend='ex-buildGoPackage'/> is an example expression using buildGoPackage,
|
|
the following arguments are of special significance to the function:
|
|
|
|
<calloutlist>
|
|
|
|
<callout arearefs='ex-buildGoPackage-1'>
|
|
<para>
|
|
<varname>goPackagePath</varname> specifies the package's canonical Go import path.
|
|
</para>
|
|
</callout>
|
|
|
|
<callout arearefs='ex-buildGoPackage-2'>
|
|
<para>
|
|
<varname>subPackages</varname> limits the builder from building child packages that
|
|
have not been listed. If <varname>subPackages</varname> is not specified, all child
|
|
packages will be built.
|
|
</para>
|
|
<para>
|
|
In this example only <literal>github.com/deis/deis/client</literal> will be built.
|
|
</para>
|
|
</callout>
|
|
|
|
<callout arearefs='ex-buildGoPackage-3'>
|
|
<para>
|
|
<varname>goDeps</varname> is where the Go dependencies of a Go program are listed
|
|
in a JSON format described below.
|
|
</para>
|
|
</callout>
|
|
|
|
<callout arearefs='ex-buildGoPackage-4'>
|
|
<para>
|
|
<varname>buildFlags</varname> is a list of flags passed to the go build command.
|
|
</para>
|
|
</callout>
|
|
|
|
</calloutlist>
|
|
|
|
</para>
|
|
|
|
<para>The <varname>goDeps</varname> attribute should point to a JSON file that defines which Go libraries
|
|
are needed and should be included in <varname>GOPATH</varname> for <varname>buildPhase</varname>.
|
|
|
|
</para>
|
|
|
|
<example xml:id='ex-goDeps'><title>deps.json</title>
|
|
<programlisting>
|
|
[ <co xml:id='ex-goDeps-1' />
|
|
{
|
|
"goPackagePath": "gopkg.in/yaml.v2", <co xml:id='ex-goDeps-2' />
|
|
"fetch": {
|
|
"type": "git", <co xml:id='ex-goDeps-3' />
|
|
"url": "https://gopkg.in/yaml.v2",
|
|
"rev": "a83829b6f1293c91addabc89d0571c246397bbf4",
|
|
"sha256": "1m4dsmk90sbi17571h6pld44zxz7jc4lrnl4f27dpd1l8g5xvjhh"
|
|
}
|
|
},
|
|
{
|
|
"include": "../../libs.json", <co xml:id='ex-goDeps-4' />
|
|
"packages": [ <co xml:id='ex-goDeps-5' />
|
|
"github.com/docopt/docopt-go",
|
|
"golang.org/x/crypto",
|
|
]
|
|
}
|
|
]
|
|
</programlisting>
|
|
</example>
|
|
|
|
<para>
|
|
|
|
<calloutlist>
|
|
|
|
<callout arearefs='ex-goDeps-1'>
|
|
<para>
|
|
<varname>goDeps</varname> is a list of Go dependencies.
|
|
</para>
|
|
</callout>
|
|
|
|
<callout arearefs='ex-goDeps-2'>
|
|
<para>
|
|
<varname>goPackagePath</varname> specifies Go package import path.
|
|
</para>
|
|
</callout>
|
|
|
|
<callout arearefs='ex-goDeps-3'>
|
|
<para>
|
|
<varname>fetch type</varname> that needs to be used to get package source. If <varname>git</varname>
|
|
is used there should be <varname>url</varname>, <varname>rev</varname> and <varname>sha256</varname>
|
|
defined next to it.
|
|
</para>
|
|
</callout>
|
|
|
|
<callout arearefs='ex-goDeps-4'>
|
|
<para>
|
|
<varname>include</varname> could be used to reuse <varname>goDeps</varname> between Go programs.
|
|
There is a common libs set in <varname><nixpkgs/pkgs/development/go-modules/libs.json></varname>
|
|
with pinned versions of many packages that you can reuse.
|
|
</para>
|
|
</callout>
|
|
|
|
<callout arearefs='ex-goDeps-5'>
|
|
<para>
|
|
<varname>packages</varname> enumerates all Go packages that will be imported from included file.
|
|
</para>
|
|
</callout>
|
|
|
|
</calloutlist>
|
|
|
|
</para>
|
|
|
|
<para>
|
|
<varname>buildGoPackage</varname> produces <xref linkend='chap-multiple-output' xrefstyle="select: title" />
|
|
where <varname>bin</varname> includes program binaries. You can test build a Go binary as follows:
|
|
|
|
<screen>
|
|
$ nix-build -A deis.bin
|
|
</screen>
|
|
|
|
or build all outputs with:
|
|
|
|
<screen>
|
|
$ nix-build -A deis.all
|
|
</screen>
|
|
|
|
<varname>bin</varname> output will be installed by default with <varname>nix-env -i</varname>
|
|
or <varname>systemPackages</varname>.
|
|
|
|
</para>
|
|
|
|
<para>
|
|
You may use Go packages installed into the active Nix profiles by adding
|
|
the following to your ~/.bashrc:
|
|
|
|
<screen>
|
|
for p in $NIX_PROFILES; do
|
|
GOPATH="$p/share/go:$GOPATH"
|
|
done
|
|
</screen>
|
|
</para>
|
|
|
|
<para>To extract dependency information from a Go package in automated way use <link xlink:href="https://github.com/kamilchm/go2nix">go2nix</link>.
|
|
It can produce complete derivation and <varname>goDeps</varname> file for Go programs.</para>
|
|
</section>
|
|
|