Add files via upload

The new and I hope the finished version for now.

Author: preklov

contrib/OpenInExplorer.lua

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+--[[
+OpenInExplorer plugin for darktable
+
+  copyright (c) 2018  Kevin Ertel
+  Update 2020 and macOS support by Volker Lenhardt
+  Linux support 2020 by Bill Ferguson
+  
+  darktable 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 3 of the License, or
+  (at your option) any later version.
+  
+  darktable 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 darktable.  If not, see <http://www.gnu.org/licenses/>.
+]]
+
+--[[About this plugin
+This plugin adds the module "OpenInExplorer" to darktable's lighttable view.
+
+----REQUIRED SOFTWARE----
+Apple macOS, Microsoft Windows or Linux
+
+----USAGE----
+Install: (see here for more detail: https://github.com/darktable-org/lua-scripts )
+ 1) Copy this file into your "lua/contrib" folder where all other scripts reside. 
+ 2) Require this file in your luarc file, as with any other dt plug-in
+
+Select the photo(s) you wish to find in your operating system's file manager and press "show in file explorer" in the "selected images" section.
+
+- Nautilus (Linux), Explorer (Windows), and Finder (macOS before Catalina) will open one window for each selected image at the file's location. The file name will be highlighted.
+
+- On macOS Catalina the Finder will open one window for each different directory. In these windows only the last one of the corresponding files will be highlighted (bug or feature?).
+
+- Dolphin (Linux) will open one window with tabs for the different directories. All the selected images' file names are highlighted in their respective directories.
+
+----KNOWN ISSUES----
+]]
+
+local dt = require "darktable"
+local du = require "lib/dtutils"
+local df = require "lib/dtutils.file"
+local dsys = require "lib/dtutils.system"
+local gettext = dt.gettext
+
+--Check API version
+du.check_min_api_version("5.0.0", "OpenInExplorer") 
+
+gettext.bindtextdomain("OpenInExplorer",dt.configuration.config_dir.."/lua/locale/")
+
+local function _(msgid)
+    return gettext.dgettext("OpenInExplorer", msgid)
+end
+
+local act_os = dt.configuration.running_os
+local PS = act_os == "windows" and  "\\"  or  "/"
+
+--Detect OS and quit if it is not supported--	
+local proper_install = true
+if act_os ~= "macos" and act_os ~= "windows" and act_os ~= "linux" then
+  proper_install = false
+  dt.print_error(_('OpenInExplorer plug-in only supports Linux, macOS, and Windows at this time'))
+  return
+end
+
+--Format strings for the commands to open the corresponding OS' file manager
+local fmng_cmd = {}
+fmng_cmd.linux = [[busctl --user call org.freedesktop.FileManager1 /org/freedesktop/FileManager1 org.freedesktop.FileManager1 ShowItems ass %d %s""]]
+fmng_cmd.macos = 'open -Rn %s'
+fmng_cmd.windows = 'explorer.exe /select, %s'
+
+--The working function that opens the file manager windows with the selected image file names highlighted.
+local function open_in_fmanager(op_sys, fmcmd)
+  local images = dt.gui.selection()
+  local curr_image, run_cmd, file_uris = '', '', ''
+  if #images == 0 then
+    dt.print(_('Please select an image'))
+  elseif #images <= 15 then
+    for _,image in pairs(images) do
+      curr_image = image.path..PS..image.filename
+      if op_sys == 'linux' then
+        file_uris = file_uris .. df.sanitize_filename("file://" .. curr_image) .. " "
+        dt.print_log("file_uris is " .. file_uris)
+      else
+        run_cmd = string.format(fmcmd, df.sanitize_filename(curr_image))
+        dt.print_log("OpenInExplorer run_cmd = "..run_cmd)
+        dsys.external_command(run_cmd)
+      end
+    end
+    if op_sys == 'linux' then
+      run_cmd = string.format(fmcmd, #images, file_uris)
+      dt.print_log("OpenInExplorer run_cmd = "..run_cmd)
+      dsys.external_command(run_cmd)
+    end
+  else
+    dt.print(_('Please select fewer images (max 15)'))
+  end
+end
+
+-- GUI --
+if proper_install then
+  dt.gui.libs.image.register_action(
+    _("show in file explorer"),
+    function() open_in_fmanager(act_os, fmng_cmd[act_os]) end,
+    _("Opens the file manager at the selected image's location")
+  )
+end