CODEWITHSUNDEEP
bashawk
Michael
Michael

Reputation: 42050

Concatenating files in Bash

Suppose I am writing a shell script foo.bash to concatenate the contents of test/*.txt with a comma like that:

> cat test/x.txt
a b c
> cat test/y.txt
1 2 3
> foo.bash test
a b c,
1 2 3

How would you write such a script ?

Upvotes: 0

Views: 80

Answers (3)

Bayou
Bayou

Reputation: 3441

You could use regex to do achive it.The command below grabs the content of every file and appends it after the name of the file ($ARGV).

$ grep -ER '*'
a.txt:a
b.txt:b
c.txt:c
$ perl -pe 's/^(.*)\n$/$ARGV:\1,/;' * > file.txt
$ cat file.txt
a.txt:a,b.txt:b,c.txt:c,

Upvotes: 0

RavinderSingh13
RavinderSingh13

Reputation: 133538

Could you please try following(in case you want to concatenate lines of files, line by line with comma).

 paste -d, *.txt

EDIT2: To concatenate all .txt files contents with , try following once(needed GNU awk).

awk 'ENDFILE{print ","} 1' *.txt | sed '$d'

Upvotes: 1

Poshi
Poshi

Reputation: 5762

What about

for file in /tmp/test/*.txt; do
    echo -n "$(cat "$file"),"
done | sed 's/.$//'

or maybe

for file in /tmp/test/*.txt; do
    sed 's/$/,/' "$file"
done | sed 's/.$//'

Upvotes: 1

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