CODEWITHSUNDEEP
sh
yoonjoo kim
yoonjoo kim

Reputation: 83

how to make script with grep --include multi file extension

myScript.sh:

grep --color -rn --include=*."$1" "$2" "$3"

command:

./myScript.sh java keyword .              # it works!
./myScript.sh java,xml keyword .          # it doesn't..
./myScript.sh {java,xml} keyword .        # it doesn't..
./myScript.sh "{java,xml}" keyword .      # it doesn't..
./myScript.sh '{java,xml}' keyword .      # it doesn't..
grep -rn --include=*.{java,xml} keyword . # of course it works

How do I command? or how do I edit myScript so that it can work?

Upvotes: 2

Views: 196

Answers (1)

Amadan
Amadan

Reputation: 198436

In your examples, {java,xml} argument gets expanded by your shell into two parameters java xml before it hits your script (which makes your $1 just java, and messes up your parameter numbering with $2 being xml, $3 being keyword).

In my hurried and untested first attempt at answering, I forgot one crucial bit: brace expansion goes first, before variable expansion, so when your variable $1 is substituted, the brace doesn't get another look.

The only way I found to get around that is using eval:

eval grep --color -rn --include=*."$1" "$2" "$3"

and calling it with

./myScript.sh '{java,xml}' keyword .

Or, simplifying a bit,

eval grep --color -rn --include=*."{$1}" "$2" "$3"

and calling with

./myScript.sh java,xml keyword .

Upvotes: 1

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