blob: 6c8db2a72757e326386e846d6557b33231027afa (
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
|
<varlistentry>
<term><option>--help</option></term>
<listitem>
<para>
Prints out a summary of the command syntax and exits.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--version</option></term>
<listitem>
<para>
Prints out the Nix version number on standard output and exits.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--verbose</option> / <option>-v</option></term>
<listitem>
<para>
Increases the level of verbosity of diagnostic messages printed
on standard error. For each Nix operation, the information
printed on standard output is well-defined; any diagnostic
information is printed on standard error, never on standard
output.
</para>
<para>
This option may be specified repeatedly. Currently, the
following verbosity levels exist:
</para>
<variablelist>
<varlistentry>
<term>0</term>
<listitem>
<para>
<quote>Errors only</quote>: only print messages explaining
why the Nix invocation failed.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>1</term>
<listitem>
<para>
<quote>Informational</quote>: print
<emphasis>useful</emphasis> messages about what Nix is
doing.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>2</term>
<listitem>
<para>
<quote>Talkative</quote>: print more informational messages.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>3</term>
<listitem>
<para>
<quote>Chatty</quote>: print even more informational messages.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>4</term>
<listitem>
<para>
<quote>Debug</quote>: print debug information:
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>5</term>
<listitem>
<para>
<quote>Vomit</quote>: print vast amounts of debug
information.
</para>
</listitem>
</varlistentry>
</variablelist>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--build-output</option> / <option>-B</option></term>
<listitem>
<para>
Causes the output written by build actions to standard output
and standard error to be echoed to standard error, regardless of
verbosity level. By default, it is only echoed at a verbosity
level of at least 4 (<quote>Debug</quote>), and is suppressed at
lower levels. Note that it is always written to a log file in
<filename><replaceable>prefix</replaceable>/nix/var/log/nix</filename>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--keep-failed</option> / <option>-K</option></term>
<listitem>
<para>
Specifies that in case of a build failure, the temporary
directory (usually in <filename>/tmp</filename>) in which the
build takes place should not be deleted. The path of the build
directory is printed as an informational message.
</para>
</listitem>
</varlistentry>
|
