Fixes .pth file has no effect in editable install

Fixes #43

The .pth file is now copied during `labscript-profile-create` if it does not exist in the site-packages dir (where the .egg-info files exist) and if it the .pth file exists in the package structure (aka labscript-utils it is an editable install)

The labscript-suite.pth file has been updated to not raise an exception if labscript-suite has been uninstalled (so we do not have to worry about cleanup).

Also updated the `labscript_profile.add_userlib_and_pythonlib` function to use the `site` library for adding userlib and pythonlib to the system path.

Author: philipstarkey

labscript-suite.pth

@@ -1,2 +1,2 @@
-import labscript_profile; labscript_profile.add_userlib_and_pythonlib()
-import labscript_profile; labscript_profile.add_development_directories()
+import sys; exec("try: import labscript_profile; labscript_profile.add_userlib_and_pythonlib()\nexcept ModuleNotFoundError: pass")
+import sys; exec("try: import labscript_profile; labscript_profile.add_development_directories()\nexcept ModuleNotFoundError: pass")

labscript_profile/__init__.py

@@ -1,3 +1,4 @@
+import site
 import sys
 import os
 from configparser import ConfigParser, NoSectionError, NoOptionError
@@ -56,8 +57,7 @@ def add_userlib_and_pythonlib():
             except (NoSectionError, NoOptionError):
                 paths = []
             for path in paths:
-                if os.path.exists(path):
-                    sys.path.append(path)
+                site.addsitedir(path)
 
 
 def add_development_directories():

labscript_profile/create.py

@@ -5,6 +5,7 @@
 from pathlib import Path
 from subprocess import check_output
 from labscript_profile import LABSCRIPT_SUITE_PROFILE, default_labconfig_path
+import desktop_app
 
 _here = os.path.dirname(os.path.abspath(__file__))
 DEFAULT_PROFILE_CONTENTS = os.path.join(_here, 'default_profile')
@@ -53,6 +54,15 @@ def make_labconfig_file():
 
 
 def create_profile():
+    # copy the .pth file if necessary (only needed for ediatble installs)
+    pth_src = Path(_here).parent / 'labscript-suite.pth'
+    site_dir = desktop_app.environment._get_install_directory('labscript_profile')
+    if site_dir is not None and pth_src.parent != site_dir:
+        pth_dest = site_dir / 'labscript-suite.pth'
+        if pth_src.exists() and not pth_dest.exists():
+            shutil.copy2(pth_src, pth_dest)
+            print(f'Copied labscript-suite.pth file to {pth_dest}')
+
     src = Path(DEFAULT_PROFILE_CONTENTS)
     dest = Path(LABSCRIPT_SUITE_PROFILE)
     # Profile directory may exist already, but we will error if it contains any of the

setup.cfg

@@ -33,6 +33,7 @@ install_requires =
   scipy
   setuptools_scm
   zprocess>=2.18.0
+  desktop-app>=0.2.5
 
 [options.extras_require]
 docs =