Add darktable ghost publish plugin

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/common/configs/user/gui/darktable/publish/publish.lua

@@ -0,0 +1,133 @@
+local dt = require "darktable"
+local df = require "lib/dtutils.file"
+local os = require "os"
+
+-- Some fucking bullshit happening right here.
+function os.capture(command, raw)
+  local f = assert(io.popen(command, 'r'))
+  local s = assert(f:read('*a'))
+  f:close()
+  if raw then return s end
+  s = string.gsub(s, '^%s+', '')
+  s = string.gsub(s, '%s+$', '')
+  s = string.gsub(s, '[\n\r]+', ' ')
+  return s
+end
+
+local publish_title = dt.new_widget("entry") {
+  placeholder = "Post Title",
+  tooltip = "enter title for the post"
+}
+
+local publish_slug = dt.new_widget("entry") {
+  placeholder = "post-slug",
+  tooltip = "enter slug for the post (URL-friendly)"
+}
+
+local publish_keywords = dt.new_widget("entry") {
+  placeholder = "keywords (space-separated)",
+  tooltip = "enter keywords (tags) for the post"
+}
+
+local strip_gps_checkbox = dt.new_widget("check_button") {
+  label = "Strip GPS data",
+  value = false,
+  tooltip = "remove GPS metadata from files before uploading"
+}
+
+local widget = dt.new_widget("box") {
+  orientation = "vertical",
+  publish_title,
+  publish_slug,
+  publish_keywords,
+  strip_gps_checkbox
+}
+
+local function initialize(storage, format, images, high_quality, extra_data)
+  extra_data.exported_files = {}
+  extra_data.cleanup_files = {}
+
+  if publish_title.text == "" then
+    extra_data.title = df.get_basename(images[1].filename)
+  else
+    extra_data.title = publish_title.text
+  end
+
+  if publish_slug.text == "" then
+    extra_data.slug = df.get_basename(images[1].filename)
+  else
+    extra_data.slug = publish_slug.text
+  end
+
+  extra_data.keywords = publish_keywords.text
+  extra_data.strip_gps = strip_gps_checkbox.value
+
+  return images
+end
+
+local function store(storage, image, format, filename, number, total, high_quality, extra_data)
+  if extra_data.strip_gps then
+    local command = string.format("exiftool -gps:all= -overwrite_original '%s'", filename)
+    os.execute(command)
+  end
+
+  if image.is_raw then
+    local original_path = image.path .. "/" .. image.filename
+    local raw_filename = original_path
+
+    if extra_data.strip_gps then
+      local tmpfile = os.tmpname()
+      local command = string.format("exiftool -gps:all= -o '%s' '%s'", tmpfile, original_path)
+      os.execute(command)
+      table.insert(extra_data.cleanup_files, tmpfile)
+      raw_filename = tmpfile
+    end
+
+    table.insert(extra_data.exported_files, filename .. ":" .. raw_filename)
+  else
+    table.insert(extra_data.exported_files, filename)
+  end
+end
+
+local function finalize(storage, image_table, extra_data)
+  local files_arg = table.concat(extra_data.exported_files, " ")
+
+  local command = string.format(
+    "darktable-publish --title '%s' --slug '%s' %s",
+    extra_data.title, extra_data.slug, files_arg
+  )
+  if extra_data.keywords ~= "" then
+    command = command .. string.format(" --keywords %s", extra_data.keywords)
+  end
+
+  -- Ignore that I use an external tool (written in JavaScript god forbid)
+  -- I am _not_ doing JSON generation and web requests in Lua
+  local result = os.capture(command)
+
+  if result and result:match("^http") then
+    dt.print("Post published: " .. result)
+  else
+    dt.print("Failed to publish post.")
+  end
+
+  local command = string.format("xdg-open %s", result)
+  os.execute(command)
+
+  for _, tmpfile in ipairs(extra_data.cleanup_files) do
+    os.remove(tmpfile)
+  end
+end
+
+local function supported(storage, format)
+  return true
+end
+
+dt.register_storage(
+  "ghost_publish",
+  "publish to Ghost CMS",
+  store,
+  finalize,
+  supported,
+  initialize,
+  widget
+)