Renaming files with the same name using sequential numbers? - google-apps-script

Question

I feel like this is pretty simple, but I'm missing something. I have 130 folders, all containing the same file, "Document.pdf". Of course, the contents vary from file to file, but they all have the same name and extension. What I'm trying to do is have a script take all those 130 files, and give them names from "1.pdf" to "130.pdf", in order. The folders are in order as well (1-130). I have these folders on both local storage and Google Drive, so any solution involving either bash or GScripts will be good with me. Thanks.

Answer 1

This should do the trick:
Code:
function renameFiles() {
var iter = 1;
while (iter <= 130) {
Logger.log(iter);
var folders = DriveApp.getFoldersByName(iter);
while (folders.hasNext()) {
var folder = folders.next();
Logger.log("Folder: " + folder.getName());
var files = folder.getFilesByName("Document.pdf");
while (files.hasNext()) {
var file = files.next();
file.setName(iter + "." + file.getMimeType().substr(-3));
Logger.log("File: " + file.getName());
}
}
iter++;
}
}
Assumptions:
Folders are named 1, 2, .... 130
Sample ouptut:

Answer 2

Assuming the directories are actually named 1, 2, and so on up to and including 130, here is a bash solution:
# Edit this to desired path
parent_dir='.'
find "$parent_dir" -maxdepth 1 -type d | while read -r directory; do
dir_name="$(basename directory)"
if [ "$dir_name" -ge 1 ] && [ "$dir_name" -le 130 ]; then
mv "$directory/Document.pdf" "$directory/$dir_name.pdf"
fi
done
This uses basename to get the name of each directory (i.e., the value between 1 and 130), and uses that to rename the Document.pdf files.
Note that -maxdepth is not POSIX. To replace -maxdepth with POSIX options, see this answer.