ENH use conky.conf as bootstrap file for config loading/validation

config/fallback.yml

@@ -1,3 +1,6 @@
+bootstrap:
+  update_interval: 1
+  dimensions: [1920, 1080]
 modules:
   filesystem:
     show_smart: true

config/schema.yml

@@ -4,7 +4,24 @@ required: [modules, layout]
 additionalProperties: false
 properties:
 
+  bootstrap:
+    required: [update_interval, dimensions]
+    additionalProperties: false
+    properties:
+      update_interval:
+        description: the update interval (seconds)
+        type: number
+      dimensions:
+        description: the max width/height of the conky window
+        type: array
+        minItems: 2
+        maxItems: 2
+        items:
+          type: integer
+          minimum: 1
+
   modules:
+    required: [filesystem, graphics, memory, power, processor, readwrite]
     additionalProperties: false
     properties:
       filesystem:

conky.conf

@@ -1,6 +1,72 @@
-local update_interval = 1 -- in seconds
+--------------------------------------------------------------------------------
+-- set up paths
 
 local conky_dir = debug.getinfo(1).source:match("@?(.*/)")
+local subdirs = {
+   '?.lua',
+   'drawing/?.lua',
+   'schema/?.lua',
+   'core/?.lua',
+   'core/widget/?.lua',
+   'core/widget/arc/?.lua',
+   'core/widget/text/?.lua',
+   'core/widget/timeseries/?.lua',
+   'core/widget/rect/?.lua',
+   'core/widget/line/?.lua',
+   'lib/share/lua/5.4/?.lua',
+   'lib/share/lua/5.4/?/init.lua',
+}
+
+for i = 1, #subdirs do
+   subdirs[i] = conky_dir..subdirs[i]
+end
+
+package.path = table.concat(subdirs, ';')
+
+package.cpath = conky_dir..'lib/lib/lua/5.4/?.so;'
+
+--------------------------------------------------------------------------------
+-- select global config to use (fallback to default if none found)
+
+local yaml = require 'lyaml'
+local i_o = require 'i_o'
+
+local schema_path = conky_dir..'/config/schema.yml'
+
+local try_config_paths = {
+   '/home/ndwar/.config/conky.yml',
+   conky_dir..'config/fallback.yml'
+}
+local config_path
+local config
+
+for i = 1, #try_config_paths do
+   config_path = try_config_paths[i]
+   local r = i_o.read_file(config_path)
+   if r ~= nil then
+      config = yaml.load(r)
+      break
+   end
+end
+
+i_o.printf('Using config at %s', config_path)
+
+if i_o.exit_code_cmd('command -v yajsv > /dev/null') == 0 then
+   local cmd = string.format('yajsv -q -s %s %s', schema_path, config_path)
+   assert(i_o.exit_code_cmd(cmd) == 0, 'ERROR: config failed validation')
+else
+   print(string.format('WARNING: could not validate config'))
+end
+
+local bootstrap = config.bootstrap
+
+local startup_hook = string.format(
+   'start %f %s %s %s',
+   bootstrap.update_interval,
+   config_path,
+   package.path,
+   package.cpath
+)
 
 conky.config = {
 	background = false,
@@ -18,9 +84,8 @@ conky.config = {
     xinerama_head = 0,
 
 	double_buffer = true,
-    -- TODO don't hardcode screen size here
-	minimum_width = 1920,
-	minimum_height = 1080,
+	minimum_width = bootstrap.dimensions[1],
+	minimum_height = bootstrap.dimensions[2],
 
 	draw_shades = false,
 	draw_outline = false,
@@ -34,7 +99,7 @@ conky.config = {
 	-- Lua Load
 	lua_load = conky_dir..'main.lua',
 	lua_draw_hook_post = 'main',
-	lua_startup_hook = string.format('start %f %s', update_interval, conky_dir)
+	lua_startup_hook = startup_hook
 }
 
 --control updates entirely in lua

core

@@ -1 +1 @@
-Subproject commit aa0d02748b4316c44e21cc4af24727aba82159ff
+Subproject commit 8f1495175f08bdc0716ef11b73d3babb10874c8b

drawing/compile.lua

@@ -146,7 +146,10 @@ end
 
 return function(update_interval, config_path)
    local update_freq = 1 / update_interval
-   local config = yaml.load(i_o.read_file(config_path))
+   local default_config = 'config.yml'
+   -- local r = i_o.read_file(config_path) or i_o.read_file(default_config)
+   local r = i_o.read_file(config_path) or i_o.read_file(default_config)
+   local config = yaml.load(r)
    local cmods = config.modules
 
    local main_state = {}

main.lua

@@ -8,27 +8,9 @@ local __cairo_create
 local __cairo_surface_destroy
 local __cairo_destroy
 
-function conky_start(update_interval, conky_dir)
-   local subdirs = {
-      '?.lua',
-      'drawing/?.lua',
-      'schema/?.lua',
-      'core/?.lua',
-      'core/widget/?.lua',
-      'core/widget/arc/?.lua',
-      'core/widget/text/?.lua',
-      'core/widget/timeseries/?.lua',
-      'core/widget/rect/?.lua',
-      'core/widget/line/?.lua',
-      'lib/share/lua/5.4/?.lua',
-      'lib/share/lua/5.4/?/init.lua',
-   }
-
-   for i = 1, #subdirs do
-      package.path = package.path..';'..conky_dir..subdirs[i]
-   end
-
-   package.cpath = package.cpath..';'..conky_dir..'lib/lib/lua/5.4/?.so;'
+function conky_start(update_interval, config_path, path, cpath)
+   package.path = package.path..';'..path
+   package.cpath = package.cpath..';'..cpath
 
    require 'cairo'
 
@@ -41,7 +23,7 @@ function conky_start(update_interval, conky_dir)
 
    conky_set_update_interval(update_interval)
 
-   draw_dynamic = compile(update_interval, conky_dir..'config.yml')
+   draw_dynamic = compile(update_interval, config_path)
 end
 
 --------------------------------------------------------------------------------