.\" #
.\" # Copyright (c) 2014, Juniper Networks, Inc.
.\" # All rights reserved.
.\" # This SOFTWARE is licensed under the LICENSE provided in the
.\" # ../Copyright file. By downloading, installing, copying, or 
.\" # using the SOFTWARE, you agree to be bound by the terms of that
.\" # LICENSE.
.\" # Phil Shafer, July 2014
.\" 
.Dd December 4, 2014
.Dt XO 1
.Os
.Sh NAME
.Nm xo
.Nd emit formatted output based on format string and arguments
.Sh SYNOPSIS
.Nm
.Op Fl options
.Op Ar argument...
.Sh DESCRIPTION
The
.Nm
utility allows command line access to the functionality of
the
.Nm libxo
library.
Using
.Nm ,
shell scripts can emit
.Em XML ,
.Em JSON ,
or
.Em HTML
using the same commands that emit text output.
.Pp
.Bl -tag -width "12345678901234567"
.It Fl "-close <path>"
Close tags for the given path
.It Fl "-depth <num>"
Set the depth for pretty printing
.It Fl "-help"
Display this help text
.It Fl "-html OR -H"
Generate HTML output
.It Fl "-json OR -J"
Generate JSON output
.It Fl "-leading-xpath <path>"
Add a prefix to generated XPaths (HTML)
.It Fl "-open <path>"
Open tags for the given path
.It Fl "-pretty OR -p"
Make 'pretty' output (add indent, newlines)
.It Fl "-style <style>"
Generate given style (xml, json, text, html)
.It Fl "-text OR -T"
Generate text output (the default style)
.It Fl "-version"
Display version information
.It Fl "-warn OR -W"
Display warnings in text on stderr
.It Fl "-warn-xml"
Display warnings in xml on stdout
.It Fl "-wrap <path>"
Wrap output in a set of containers
.It Fl "-xml OR -X"
Generate XML output
.It Fl "-xpath"
Add XPath data to HTML output
.El
.Pp
The
.Nm
utility accepts a format string suitable for
.Xr xo_emit 3
and a set of zero or more arguments used to supply data for that string.
.Bd -literal -offset indent
    xo "The {k:name} weighs {:weight/%d} pounds.\\n" fish 6

  TEXT:
    The fish weighs 6 pounds.
  XML:
    <name>fish</name>
    <weight>6</weight>
  JSON:
    "name": "fish",
    "weight": 6
  HTML:
    <div class="line">
      <div class="text">The </div>
      <div class="data" data-tag="name">fish</div>
      <div class="text"> weighs </div>
      <div class="data" data-tag="weight">6</div>
      <div class="text"> pounds.</div>
    </div>
.Ed
.Pp
The
.Fl "-wrap <path>"
option can be used to wrap emitted content in a
specific hierarchy.
The path is a set of hierarchical names separated
by the '/' character.
.Bd -literal -offset indent
    xo --wrap top/a/b/c '{:tag}' value

  XML:
    <top>
      <a>
        <b>
          <c>
            <tag>value</tag>
          </c>
        </b>
      </a>
    </top>
  JSON:
    "top": {
      "a": {
        "b": {
          "c": {
            "tag": "value"
          }
        }
      }
    }
.Ed
.Pp
The
.Fl "\-open <path>"
and
.Fl "\-close <path>"
can be used to emit
hierarchical information without the matching close and open
tag.
This allows a shell script to emit open tags, data, and
then close tags.
The
.Fl \-depth
option may be used to set the
depth for indentation.
The
.Fl "\-leading-xpath"
may be used to
prepend data to the XPath values used for HTML output style.
.Bd -literal -offset indent
    #!/bin/sh
    xo --open top/data
    xo --depth 2 '{tag}' value
    xo --close top/data
  XML:
    <top>
      <data>
        <tag>value</tag>
      </data>
    </top>
  JSON:
    "top": {
      "data": {
        "tag": "value"
      }
    }
.Ed
.Sh EXAMPLE
.Bd -literal
  % xo 'The {:product} is {:status}\n' stereo "in route"
  The stereo is in route
  % xo -p -X 'The {:product} is {:status}\n' stereo "in route"
  <product>stereo</product>
  <status>in route</status>
.Ed
.Sh SEE ALSO
.Xr libxo 3 ,
.Xr xo_emit 3