[Core] Added separate dev cog

This is enabled with the cli flag --dev

core/core_commands.py

@@ -0,0 +1,75 @@
+from discord.ext import commands
+from core import checks
+import logging
+import importlib
+import os
+import discord
+
+log = logging.getLogger("red")
+
+
+class Core:
+    """Commands related to core functions"""
+
+    @commands.command()
+    @checks.is_owner()
+    async def load(self, ctx, *, cog_name: str):
+        """Loads a package"""
+        if not cog_name.startswith("cogs."):
+            cog_name = "cogs." + cog_name
+
+        try:
+            ctx.bot.load_extension(cog_name)
+        except Exception as e:
+            log.exception("Package loading failed", exc_info=e)
+            await ctx.send("Failed to load package. Check your console or "
+                           "logs for details.")
+        else:
+            await ctx.bot.save_packages_status()
+            await ctx.send("Done.")
+
+    @commands.group()
+    @checks.is_owner()
+    async def unload(self, ctx, *, cog_name: str):
+        """Unloads a package"""
+        if not cog_name.startswith("cogs."):
+            cog_name = "cogs." + cog_name
+
+        if cog_name in ctx.bot.extensions:
+            ctx.bot.unload_extension(cog_name)
+            await ctx.bot.save_packages_status()
+            await ctx.send("Done.")
+        else:
+            await ctx.send("That extension is not loaded.")
+
+    @commands.command(name="reload")
+    @checks.is_owner()
+    async def _reload(self, ctx, *, cog_name: str):
+        """Reloads a package"""
+        if not cog_name.startswith("cogs."):
+            cog_name = "cogs." + cog_name
+
+        try:
+            self.refresh_modules(cog_name)
+            ctx.bot.unload_extension(cog_name)
+            ctx.bot.load_extension(cog_name)
+        except Exception as e:
+            log.exception("Package reloading failed", exc_info=e)
+            await ctx.send("Failed to reload package. Check your console or "
+                           "logs for details.")
+        else:
+            await ctx.bot.save_packages_status()
+            await ctx.send("Done.")
+
+    def refresh_modules(self, module):
+        """Interally reloads modules so that changes are detected"""
+        module = module.replace(".", os.sep)
+        for root, dirs, files in os.walk(module):
+            for name in files:
+                if name.endswith(".py"):
+                    path = os.path.join(root, name)
+                    path, _ = os.path.splitext(path)
+                    path = ".".join(path.split(os.sep))
+                    print("Reloading " + path)
+                    m = importlib.import_module(path)
+                    importlib.reload(m)