discourse/script/downsize_uploads.rb

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# frozen_string_literal: true
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require File.expand_path("../../config/environment", __FILE__)
# Supported ENV arguments:
#
# VERBOSE=1
# Shows debug information.
#
# INTERACTIVE=1
# Shows debug information and pauses for input on issues.
#
# WORKER_ID/WORKER_COUNT
# When running the script on a single forum in multiple terminals.
# For example, if you want 4 concurrent scripts use WORKER_COUNT=4
# and WORKER_ID from 0 to 3
MIN_IMAGE_PIXELS = 500_000 # 0.5 megapixels
DEFAULT_IMAGE_PIXELS = 1_000_000 # 1 megapixel
MAX_IMAGE_PIXELS = [
ARGV[0]&.to_i || DEFAULT_IMAGE_PIXELS,
MIN_IMAGE_PIXELS
].max
ENV["VERBOSE"] = "1" if ENV["INTERACTIVE"]
def log(*args)
puts(*args) if ENV["VERBOSE"]
end
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def process_uploads
puts "", "Downsizing images to no more than #{MAX_IMAGE_PIXELS} pixels"
dimensions_count = 0
downsized_count = 0
scope = Upload.by_users.where("LOWER(extension) IN ('jpg', 'jpeg', 'gif', 'png')")
scope = scope.where(<<-SQL, MAX_IMAGE_PIXELS)
COALESCE(width, 0) = 0 OR
COALESCE(height, 0) = 0 OR
COALESCE(thumbnail_width, 0) = 0 OR
COALESCE(thumbnail_height, 0) = 0 OR
width * height > ?
SQL
if ENV["WORKER_ID"] && ENV["WORKER_COUNT"]
scope = scope.where("id % ? = ?", ENV["WORKER_COUNT"], ENV["WORKER_ID"])
end
skipped = 0
total_count = scope.count
puts "Uploads to process: #{total_count}"
scope.find_each.with_index do |upload, index|
progress = (index * 100.0 / total_count).round(1)
log "\n"
print "\r#{progress}% Fixed dimensions: #{dimensions_count} Downsized: #{downsized_count} Skipped: #{skipped} (upload id: #{upload.id})"
log "\n"
path = if upload.local?
Discourse.store.path_for(upload)
else
(Discourse.store.download(upload, max_file_size_kb: 100.megabytes) rescue nil)&.path
end
unless path
log "No image path"
skipped += 1
next
end
begin
w, h = FastImage.size(path, raise_on_failure: true)
rescue FastImage::UnknownImageType
log "Unknown image type"
skipped += 1
next
rescue FastImage::SizeNotFound
log "Size not found"
skipped += 1
next
end
if !w || !h
log "Invalid image dimensions"
skipped += 1
next
end
ww, hh = ImageSizer.resize(w, h)
if w == 0 || h == 0 || ww == 0 || hh == 0
log "Invalid image dimensions"
skipped += 1
next
end
upload.attributes = {
width: w,
height: h,
thumbnail_width: ww,
thumbnail_height: hh,
filesize: File.size(path)
}
if upload.changed?
log "Correcting the upload dimensions"
log "Before: #{upload.width_was}x#{upload.height_was} #{upload.thumbnail_width_was}x#{upload.thumbnail_height_was} (#{upload.filesize_was})"
log "After: #{w}x#{h} #{ww}x#{hh} (#{upload.filesize})"
dimensions_count += 1
upload.save!
end
if w * h < MAX_IMAGE_PIXELS
log "Image size within allowed range"
skipped += 1
next
end
result = ShrinkUploadedImage.new(
upload: upload,
path: path,
max_pixels: MAX_IMAGE_PIXELS,
verbose: ENV["VERBOSE"],
interactive: ENV["INTERACTIVE"]
).perform
if result
downsized_count += 1
else
skipped += 1
end
end
STDIN.beep
puts "", "Done", Time.zone.now
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end
process_uploads