This a tool that will take JSON over STDIN and convert it to XML to STDOUT. This tool is written in Go. You can install the Go language from https://golang.org and compile this to your operating system.
You can build it locally using go build jsontoxml.go which will build an executable. If you need to cross compile for a different platform that is really easy for Go see below. For example, you have a windows machine and need to compile a Linux executable, Go makes this possible.
For a better example of cross compilation in Go, see Dave Cheney's post at http://dave.cheney.net/2015/03/03/cross-compilation-just-got-a-whole-lot-better-in-go-1-5
Here is a command I use to compile from OSX to an 64 bit Linux executable. This will produce a single binary that can be deployed and it includes all dependencies.
GOOS=linux GOARCH=amd64 go build -o jsontoxml jsontoxml.go
There is NO need to install anything else but the artifact produced. The -o jsontoxml controls the executable name. So if you want the executable to be called superduper-jsontoxml you would just use that for the -o parameters.
See the downloads folder for cross compiled executables built with gox.
You can pipe in a file to the application like this:
In this example we are using the go run command which compiles then runs.
cat ~/Downloads/test.json | go run jsontoxml.go
In this example we assume we compiled a binary to jsontoxml and call it with some parameters.
./jsontoxml '{"foo":"bar"}'
returns
<root><foo>bar</foo></root>