Support for importing the in-camera ratings from Fujifilm cameras

contrib/fujifilm_ratings.lua

@@ -0,0 +1,56 @@
+--[[ fujifilm_ratings-0.1
+
+Support for importing Fujifilm in-camera ratings in darktable.
+
+Copyright (C) 2017 Ben Mendis <ben.mendis@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+Dependencies:
+- exiftool (https://www.sno.phy.queensu.ca/~phil/exiftool/)
+
+--]]
+
+darktable = require "darktable"
+
+local function detect_rating(event, image)
+	local RAF_filename = tostring(image)
+	local JPEG_filename = string.gsub(RAF_filename, "%.RAF$", ".JPG")
+	local command = "exiftool -Rating " .. JPEG_filename
+	darktable.print_error(command)
+	local output = io.popen(command)
+	local jpeg_result = output:read("*all")
+	output:close()
+	if string.len(jpeg_result) > 0 then
+		jpeg_result = string.gsub(jpeg_result, "^Rating.*(%d)", "%1")
+		image.rating = tonumber(jpeg_result)
+		darktable.print_error("Using JPEG Rating: " .. tostring(jpeg_result))
+		return
+	end
+	command = "exiftool -Rating " .. RAF_filename
+	darktable.print_error(command)
+	output = io.popen(command)
+	local raf_result = output:read("*all")
+	output:close()
+	if string.len(raf_result) > 0 then
+		raf_result = string.gsub(raf_result, "^Rating.*(%d)", "%1")
+		image.rating = tonumber(raf_result)
+		darktable.print_error("Using RAF Rating: " .. tostring(raf_result))
+	end
+end
+
+darktable.register_event("post-import-image", detect_rating)
+
+darktable.print_error("fujifilm_ratings loaded.")