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79 lines
3.0 KiB
Nu
79 lines
3.0 KiB
Nu
#!/usr/bin/env nu
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use std
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# This script is intended to backup the contents of my Viofo A229 dashcam to my computer, very quickly and efficiently.
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# It is intended to be ran semi-rarely (every month or two), and is also a limited test of the Fish shell/scripting language.
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# It is intended to be cross-platform, but targets Ubuntu 22.04 LTS (with WSL2 support).
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# Acquire a list of potential mountable drive letters
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let irrelevant = mount | grep drvfs | split column " " | get column1 | split column ":" | get column1
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mut mountable = cmd.exe /C "wmic logicaldisk get name" e> (std null-device) | split row "\n" | skip 1 | split column ":" | get column1 | filter {|x| ($irrelevant | find $x | length) == 0}
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print "Pick a USB device to mount for Viofo backup:"
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let letter = $mountable | input list
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let drive_letter = $"($letter):"
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# Mount the drive
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# TODO: Check if the drive is already mounted
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sudo mkdir --parents /mnt/($letter)
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sudo mount -t drvfs ($drive_letter) /mnt/($letter) -o uid=(id -u $env.USER),gid=(id -g $env.USER),metadata
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# Test permissions & folder structure
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let expected_folders = [
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"DCIM",
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"DCIM/Movie",
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"DCIM/Movie/RO",
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"DCIM/Photo"
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]
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print "Checking folder structure..."
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for folder_suffix in $expected_folders {
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# Test folder existence
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let path = $"/mnt/($letter)/($folder_suffix)"
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let status = test -d ($path) | complete
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if $status.exit_code != 0 {
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print $"Error: Expected folder ($path) does not exist."
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exit 1
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}
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# TODO: Test folder permissions (READ, EXECUTE required)
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# TODO: Test file permissions (all RO/Photo need READ/WRITE)
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}
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# Invoke rsync to copy the files
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print "Copying video files..."
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try {
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let source = $"/mnt/($letter)/DCIM/Movie/RO"
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let target = "roman:/mnt/user/media/dashcam/video"
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do -c { rsync -avh --progress --remove-source-files ($source) ($target) }
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} catch {
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print $env.LAST_EXIT_CODE
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}
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print "Copying photo files..."
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try {
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let source = $"/mnt/($letter)/DCIM/Photo"
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let target = "roman:/mnt/user/media/dashcam/photo"
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do -c { rsync -avh --progress --remove-source-files ($source) ($target) }
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} catch {
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print $env.LAST_EXIT_CODE
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}
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print "Sync complete."
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# Unmount the drive
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print "Unmounting drive..."
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sudo umount /mnt/($letter)
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sudo rmdir /mnt/($letter)
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# TODO: Check if duplicate mounts exist
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print "All backed up."
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# TODO: Statistical analysis of file duration
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# On average, how far back do my recordings go? 2 months?
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# While the oldest video file could give an idea of how back I currently go, it would be better to use p99 average bitrate.
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# If you know the average bitrate, you can use the current space occupied by all files to estimate the total duration you could store on the drive.
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# Then, if you can estimate the daily recording duration on average, you can estimate how many days back you can record on average.
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# Additionally, since this script removes files, it might be better to use the 'full size' of the disk to estimate maximum duration capacity (minus 1GB). |