查找和替换两个文件夹之间的图像文件

Question

I have two folders on my Mac's hard drive.

Directory A, and Directory B

Both directories contain image files.

I need to find matching filenames is Dir A.

If I find a match overwrite the file in Dir A with the matching one from Dir B.

How should I approach this?

Answer 1

rsync is THE best tool for synchronizing files. It has tons of options so be sure to read the man page in detail.

rsync -rv --inplace --existing /path/to/dir/b/* /path/to/dir/a

If you want to write a script then the this should do what you are looking for:

#!/bin/bash

DIR_A='/path/to/dir_a'
DIR_B='/path/to/dir_b'

for file in "$DIR_B"/*; do 
    name="${file##*/}" 
    if [[ -e $DIR_A/$name ]]; then 
        echo "Match found = $name"; 
        cp "$file" "$DIR_A" 
    fi
done

What it does is, look for files in Directory B and extracts the file name (since we use absolute paths). It checks for that filename to see if it exists in Directory A. -e is the test that does that. If it is successful test then we print a message saying that Match found along with the filename. We then proceed to copy the file from Directory B to Directory A.

Now you may choose to remove the message that prints out to the screen and use mv instead of cp if you don't want the copy present in Directory B.