Is there a bash equivalent to "some content #{foo}" with ruby?

Question

I'm used to being able to pass variables inside strings in ruby, like so

"message in double quotes #{expression_or_variable_to_run}"

What's the equivalent in bash, for really quick scripting?

score 7 · Accepted Answer · answered Jul 07 '09 at 13:01

7

Is this what you're after?

#!/bin/bash

# Source hostname from command.
echo "Hostname is $(hostname)"

# Set hostname as string.
HOSTNAME="somestring"
echo "Hostname is ${HOSTNAME}"

answered Jul 07 '09 at 13:01

Dan Carley

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Beat me by that much. – Dennis Williamson Jul 07 '09 at 13:04
2

However, $() is not "sourcing" - it's a subshell. – Dennis Williamson Jul 07 '09 at 13:06
Ah, this is -exactly- what need, thanks! – Chris Adams Jul 07 '09 at 14:26
I didn't mean source in a Bash '. ' sense. Just that the command was the source of the string. Semantics ;) – Dan Carley Jul 08 '09 at 10:08

score 1 · Answer 2 · answered Jul 07 '09 at 12:54

1

Maybe this will help you understand some basics:

#!/bin/bash
VARIABLE="is"
echo "the server $VARIABLE `hostname`"

Variables are defined without $, referenced with $. Shell commands can be executed within `` quotes.

answered Jul 07 '09 at 12:54

Karolis T.

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backticks should be extracted with a hot needle and a pair of tweezers - **use $() instead** - http://mywiki.wooledge.org/BashFAQ/082 – Dennis Williamson Jul 07 '09 at 13:02

Is there a bash equivalent to "some content #{foo}" with ruby?

2 Answers2