blob: e56d7dd389d95e81062f82dcda68662ddbad7b33 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
<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"
}
}
]
</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>
</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>
|