Piping to Spidermonkey isn't working correctly

I've installed the latest version of Spidermonkey (JavaScript-C 1.8.5+ 2011-04-16) and have noticed a strange quirk that you might k开发者_如何学JAVAnow the answer to.

In the past, if I did:

echo -n "print('hi');"

The result would come back as:

js> hi

However, now when I run that very same command, the return output I get is:

js> print('hi');
hi
js>

As you can see there are 3 lines of output, rather than just 1.

This normally wouldn't be an issue, but I'm working with a particular CMS which isn't handling this exception and so just errors out.

Is there a workaround? Should I just install an older version?

P.S. I understand Spidermonkey has the option of "e" (i.e. js -e "print('hi')") to run inline code, but once again the CMS I'm using doesn't work that way :\

Looks like they have changed the way spidermonkey works in the newest versions. To overcome this issue in Ubuntu 10+ follow these instructions:

sudo add-apt-repository ppa:launchpad/ppa
sudo apt-get update
sudo apt-get install spidermonkey-bin

Now if you run:

echo -n "print('hi');" | js

It will print:

hi 

+1 for Anton Babushkin's answer, but the newest SpiderMonkey command line option parser actually a subtle distinction here:

$ echo -n "print('hi');" | ./js
js> print('hi');
hi
js> 
$ echo -n "print('hi');" | ./js -
hi

I rewrote the option parser only a few months ago so this would have to be with an up to date version.