foo

plugin/mesh_plugin.py

@@ -1,17 +1,60 @@
-import os.path
+from os import path
+import subprocess
+import sys
+
+import wx
 
 import pcbnew
 
-from .mesh_dialog import show_dialog
+def check_requirements(*packages):
+    missing = []
+    for pkg in packages:
+        try:
+            __import__(pkg)
+        except ImportError:
+            missing.append(pkg)
+
+    if missing:
+        if 'win' not in sys.platform:
+            wx.MessageDialog(None, "Error: Missing python dependencies {}.".format(', '.join(missing)),
+                    "Missing Dependencies").ShowModal()
+            return False
+        
+        else:
+            msg = 'The following python dependencies are missing:\n\n' + '\n'.join(missing) +\
+                  '\n\nShould we go ahead and install these missing dependencies into the plugin directory?'
+            dialog = wx.MessageDialog(None, msg, caption='Error: Missing dependencies', style=wx.YES_NO | wx.NO_DEFAULT)
+            dialog.SetYesNoLabels("Install missing dependencies", "Cancel")
+            if dialog.ShowModal() == wx.ID_YES:
+                for dep in packages:
+                    proc = subprocess.Popen(
+                            "pip install --target deps {} --no-use-pep517 --only-binary :all: --platform win_amd64"\
+                                    .format(dep).split(),
+                            cwd=path.dirname(__file__),
+                            stdout=subprocess.PIPE,
+                            stderr=subprocess.PIPE)
+                    (stdout, stderr) = proc.communicate()
+                    if proc.returncode != 0:
+                        wx.MessageDialog(None, "Error installing dependencies:\n\n{}\n{}".format(stdout, stderr),
+                                "Installation Error").ShowModal()
+                        return False
+
+                sys.path.append(path.abspath(path.join(path.dirname(__file__), 'deps')))
+
+    else:
+        return True
 
 class MeshPlugin(pcbnew.ActionPlugin):
     def defaults(self):
         self.name = 'Mesh generator'
         self.category = 'Modify PCB'
         self.description = 'Creates security mesh traces on a PCB'
-        self.icon_file_name = os.path.join(os.path.dirname(__file__), 'mesh_plugin_icon.png')
+        self.icon_file_name = path.join(path.dirname(__file__), 'mesh_plugin_icon.png')
         self.show_toolbar_button = True
 
     def Run(self):
-        import pcbnew
+        if not check_requirements('pyclipper'):
+            return
+
+        from .mesh_dialog import show_dialog
         show_dialog(pcbnew.GetBoard())