CODEWITHSUNDEEP
bash
enumag
enumag

Reputation: 916

Add newline to all files that don't already have one

I made a mistake in my .editorconfig definition and forgot to add

insert_final_newline = true

So now some files do have a newline at the end while some do not.

I found similar questions such as:

However the solutions provided there add a newline to all files. I need to only add it to those that don't have a final newline already.

EDIT: The question that was linked as answering mine question doesn't do so as the answers are for single file only. I need this recursively for all files. Voting to reopen.

Upvotes: 0

Views: 316

Answers (1)

user1934428
user1934428

Reputation: 22237

UPDATE : I updated this solution to accomodate the comment by Paul Hodges:

Just test, whether the last character in a file is a newline:

if [[ -z $(tail -c 1 YOUR_FILE) && ! -s YOUR_FILE ]]
then
  # File ends in a newline, don't add one
else
  # No newline in file, or file empty - add a newline
fi

Explanation:

If a file ends in a newline, tail -c 1 will return this newline character, but command substition will remove it. Therefore $(tail -c 1 ...) will be empty. However, if the file itself is empty, the $(tail ...) will also be empty. Therefore we need a check for the file being not-empty (! -s ... ).

Upvotes: 2

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