javascript - How do you change a line of code in a specific file?

Question

Closed. This question needs details or clarity. It is not currently accepting answers. question from:https://stackoverflow.com/questions/65850847/how-do-you-change-a-line-of-code-in-a-specific-file

Answer 1

grep checks for matches in a file. sed is a stream editor. What you can do is locate the file containing a string (or line of code) using grep, then stream (or pipe) the file through sed to create a new (updated) file, then overwrite the old file.

From the top of my head:

STRING="Import {something,somethingElse} from “something”"
REPLACE="Import {something} from “something”"

MATCHING_FILES=$(grep -r $(DIR) -e "$STRING" -l)
OUTPUT=`mktemp`

for file in "$MATCHING_FILES"; do
    cat $file | sed -e "s/$STRING/$REPLACE/g" > $OUTPUT
    cp $OUTPUT $file
done

For a single file, you can omit the grep step as you know its path:

STRING="Import {something,somethingElse} from “something”"
REPLACE="Import {something} from “something”"

OUTPUT=`mktemp`

cat $YOUR_FILE | sed -e "s/$STRING/$REPLACE/g" > $OUTPUT
cp $OUTPUT $YOUR_FILE