Allow running calibre from source without needing to run either develop or install

Author: kovidgoyal

run-local

@@ -0,0 +1,26 @@
+#!/usr/bin/env python
+import importlib
+import os
+import sys
+
+
+sys.run_local = os.path.abspath(__file__)
+base = os.path.dirname(sys.run_local)
+src = os.path.join(base, 'src')
+if src not in sys.path:
+    sys.path.insert(0, src)
+sys.resources_location = os.path.join(base, 'resources')
+sys.extensions_location = os.path.join(src, 'calibre', 'plugins')
+entry_point = sys.argv[1]
+del sys.argv[1]
+del src
+del base
+
+for ep in importlib.import_module('calibre.linux').entry_points.values():
+    for line in ep:
+        q, spec = (x.strip() for x in line.split('='))
+        if q == entry_point:
+            mod, func = spec.split(':')
+            m = importlib.import_module(mod)
+            sys.exit(getattr(m, func)())
+raise SystemExit('No entry point named: {}'.format(entry_point))

src/calibre/utils/ipc/launch.py

@@ -62,6 +62,8 @@ def osx_contents_dir(self):
     def executable(self):
         if hasattr(sys, 'running_from_setup'):
             return [sys.executable, os.path.join(sys.setup_dir, 'run-calibre-worker.py')]
+        if getattr(sys, 'run_local', False):
+            return [sys.executable, sys.run_local, self.exe_name]
         e = self.exe_name
         if iswindows:
             return os.path.join(os.path.dirname(sys.executable),