Remove redundant braces from code

Question

I am trying to use tr command or any similar command to perform a specific text manipulation to this block:

if (/*condition*/)
{
    statement1;
}
int a=3;
if (a)
{
    statement1;
    statement2;
}
else
{
    statement1;
    statement2;
    statement3;
    statement4;
    ///may be more lines
}

I want to remove single line commands and get this:

if (/*condition*/)
    statement1;
int a=3;
if (a)
{
    statement1;
    statement2;
}
else
{
    statement1;
    statement2;
    statement3;
    statement4;
    ///may be more lines
}

I've tried tr -s '{}' ' ' <file.txt but it squeezes all of the braces, not with the specific single line format.

Thanks

You cannot do that with `tr` - it simply replaces character A with character B largely. — Mark Setchell, Jun 26 '15 at 10:25

score 0 · Answer 1 · answered Jun 26 '15 at 10:27

0

You can set the record separator to either { or } and check how many fields you have. If there are more than one, print brackets around:

$ awk -v RS=[{}] 'NF>1{$0="{"$0"}"}1' file
if(true)


statement;


if(false)

{
statement1;
statement2;
}

answered Jun 26 '15 at 10:27

fedorqui

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It keeps empty lines in between. I am trying to figure out how to remove them. – fedorqui Jun 26 '15 at 10:28
@Potter6000 yep, however I am using a different Record Separator (RS) instead of the default new line. So this would work if we piped to the awk you suggest or any other tool removing empty lines. But I was hoping to find a one-command to do all together. – fedorqui Jun 26 '15 at 13:26
@Potter6000 update your question showing some representative data. I of course based my answer in the input you gave. If you were thinking in another type of input, edit your question. But try to stick to one thing, otherwise I don't think I will follow up. – fedorqui Jun 26 '15 at 13:28
Uhms, now I see my answer is quite fragile. I will probably delete it and see if I can improve it – fedorqui Jun 26 '15 at 13:37

Remove redundant braces from code

1 Answers1