giannoug · August 11, 2021 19:26 · Aug 11, 2021
diff --git a/rename.sh b/rename.sh
@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+
+# Any copyright is dedicated to the Public Domain.
+# https://creativecommons.org/publicdomain/zero/1.0/
+
+# This script was used to migrate photos and videos saved
+# from Dropbox to OneDrive. Since both services use their
+# own naming scheme, I wanted to maintain consistency between
+# the newly uploaded files (automatically from my devices) and
+# the old ones migrated from Dropbox.
+# This script renames files from the Dropbox format
+# (e.g. 2018-07-27 20.12.21.jpg) to OneDrive format
+# (e.g. 20180727_201221.jpg). Special care was taken for duplicate
+# files within the same second (e.g: 2016-07-19 07.50.07-1.mp4 for
+# Dropbox and 20160719_075007_001.mp4 for OneDrive).
+
+source_dir=$1
+
+[ ! -d "$source_dir" ] && {
+  echo "Source directory doesn't exist or isn't specified."
+  exit 1
+}
+
+destination_dir=$2
+
+[ ! -d "$destination_dir" ] && mkdir "$destination_dir"
+
+for file in $source_dir/*; do
+  basename=$(basename "$file")
+
+  filename="${basename%.*}"
+  extension="${basename##*.}"
+  number=$(echo $filename | cut -d'-' -f4)
+
+  # Replace . in filename to : so date parses the format
+  replaced=${filename//\./\:}
+
+  # Check if a sequence number is added at the end
+  if [ -z "$number" ]; then
+    new_date=$(date --date="$replaced" "+%Y%m%d_%H%M%S")
+    new_filename=$destination_dir/$new_date.$extension
+  else
+    removed_number=${replaced%-*}
+    new_date=$(date --date="$removed_number" "+%Y%m%d_%H%M%S")
+    prepended_number=$(printf "%03d" $number)
+    new_filename="$destination_dir/${new_date}_$prepended_number.$extension"
+  fi
+
+  cp -p "$file" $new_filename
+
+  echo "Copied $file to $new_filename"
+done
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