refactor: better install script

install.lua

@@ -1,9 +1,13 @@
 local LIST_FILES = {
   'miner.lua',
   'simple-harvester.lua',
+  'inferium-upgrader.lua'
+};
+
+local LIST_LIBS_FILES = {
   'libs/turtle-utils.lua',
   'libs/robot.lua'
-};
+}
 
 local LIST_CONFIG_FILES = {
   'startup.lua',
@@ -13,21 +17,38 @@ local LIST_CONFIG_FILES = {
 
 local REPO_PREFIX = 'https://git.trapcloud.fr/guillaumearm/minecraft-cc-tools/raw/branch/master/'
 
-local previousDir = shell.dir()
 
+local prepareDirs = function()
   fs.makeDir('/libs')
   fs.makeDir('/config')
+end
 
-for _, filePath in pairs(LIST_FILES) do
+local installFiles = function(list)
+  for _, filePath in pairs(list) do
     fs.delete(filePath)
     shell.execute('wget', REPO_PREFIX .. filePath, filePath)
   end
+end
 
+local installConfig = function()
   -- do not override existing config files
   for _, filePath in pairs(LIST_CONFIG_FILES) do
     if not fs.exists(filePath) then
       shell.execute('wget', REPO_PREFIX .. filePath, filePath)
     end
   end
+end
+
+local function mainSetup = function()
+  local previousDir = shell.dir()
+
+  prepareDirs()
+  installFiles(LIST_LIBS_FILES)
+  installFiles(LIST_FILES)
+  installConfig()
 
   shell.setDir(previousDir)
+end
+
+mainSetup()
+