Changed check_min_api_version() to print error messages and throw an error if the minimum api is not satisfied. Updated the scripts to reflect the changed check_min_api_version().

official/check_for_updates.lua

@@ -32,10 +32,7 @@ local du = require "lib/dtutils"
 local https = require "ssl.https"
 local cjson = require "cjson"
 
-if not du.check_min_api_version("2.0.0") then
-  dt.print("ERROR:check_for_updates not loaded.  Lua API version 2.0.0 or greater required.")
-  return
-end
+du.check_min_api_version("2.0.0", "check_for_updates") 
 
 -- compare two version strings of the form "major.minor.patch"
 -- returns -1, 0, 1 if the first version is smaller, equal, greater than the second version,

official/copy_paste_metadata.lua

@@ -28,10 +28,7 @@ USAGE
 local dt = require "darktable"
 local du = require "lib/dtutils"
 
-if not du.check_min_api_version("3.0.0") then
-  dt.print("ERROR:copy_paste_metadata not loaded.  Lua API version 3.0.0 or greater required.")
-  return
-end
+du.check_min_api_version("3.0.0", "copy_paste_metadata")
 
 -- set this to "false" if you don't want to overwrite metadata fields
 -- (title, description, creator, publisher and rights) that are already set

official/delete_long_tags.lua

@@ -31,10 +31,7 @@ all tags longer than the given length will be automatically deleted at every res
 local dt = require "darktable"
 local du = require "lib/dtutils"
 
-if not du.check_min_api_version("2.0.0") then
-  dt.print("ERROR:delete_long_tags not loaded.  Lua API version 2.0.0 or greater required.")
-  return
-end
+du.check_min_api_version("2.0.0", "delete_long_tags") 
 
 dt.preferences.register("delete_long_tags", "length", "integer",
                         "maximum length of tags to keep",

official/delete_unused_tags.lua

@@ -29,10 +29,7 @@ all tags that are not used will be automatically deleted at every restart
 local dt = require "darktable"
 local du = require "lib/dtutils"
 
-if not du.check_min_api_version("5.0.0") then
-  dt.print("ERROR:delete_unused_tags not loaded.  Lua API version 5.0.0 or greater required.")
-  return
-end
+du.check_min_api_version("5.0.0", "delete_unused_tags") 
 
 -- deleting while iterating the tags list seems to break the iterator!
 local unused_tags = {}

official/enfuse.lua

@@ -38,10 +38,7 @@ local df = require "lib/dtutils.file"
 require "official/yield"
 local gettext = dt.gettext
 
-if not du.check_min_api_version("3.0.0") then
-  dt.print("ERROR:enfuse not loaded.  Lua API version 3.0.0 or greater required.")
-  return
-end
+du.check_min_api_version("3.0.0", "enfuse")
 
 -- Tell gettext where to find the .mo file translating messages for a particular domain
 gettext.bindtextdomain("enfuse",dt.configuration.config_dir.."/lua/locale/")

official/generate_image_txt.lua

@@ -39,10 +39,7 @@ local du = require "lib/dtutils"
 require "darktable.debug"
 require "official/yield"
 
-if not du.check_min_api_version("2.1.0") then
-  dt.print("ERROR:generate_image_txt not loaded.  Lua API version 2.1.0 or greater required.")
-  return
-end
+du.check_min_api_version("2.1.0", "generate_image_txt") 
 
 dt.preferences.register("generate_image_txt",
                         "enabled",

official/image_path_in_ui.lua

@@ -31,10 +31,7 @@ This plugin will add a widget at the bottom of the left column in lighttable mod
 local dt = require "darktable"
 local du = require "lib/dtutils"
 
-if not du.check_min_api_version("2.0.0") then
-  dt.print("ERROR:image_path_in_ui not loaded.  Lua API version 2.0.0 or greater required.")
-  return
-end
+du.check_min_api_version("2.0.0", "image_path_in_ui") 
 
 local main_label = dt.new_widget("label"){selectable = true, ellipsize = "middle", halign = "start"}
 

official/save_selection.lua

@@ -36,10 +36,7 @@ increase it if you need more temporary selection buffers
 local dt = require "darktable"
 local du = require "lib/dtutils"
 
-if not du.check_min_api_version("2.0.0") then
-  dt.print("ERROR:save_selection not loaded.  Lua API version 2.0.0 or greater required.")
-  return
-end
+du.check_min_api_version("2.0.0", "save_selection") 
 
 local buffer_count = 5
 

official/selection_to_pdf.lua

@@ -37,10 +37,7 @@ local dt = require "darktable"
 local du = require "lib/dtutils"
 require "official/yield"
 
-if not du.check_min_api_version("2.0.0") then
-  dt.print("ERROR:selection_to_pdf not loaded.  Lua API version 2.0.0 or greater required.")
-  return
-end
+du.check_min_api_version("2.0.0", "selection_to_pdf")
 
 dt.preferences.register
    ("selection_to_pdf","Open with","string",