Merge pull request #24 from beeware/exec-name

Ensure that sys.executable returns the executable name

{{ cookiecutter.format }}/bootstrap/main.c

@@ -34,7 +34,7 @@ int main(int argc, char *argv[]) {
     // Establish where the executable is located;
     // other application paths will be computed relative to this location
     exe_path = realpath("/proc/self/exe", NULL);
-    bin_path = dirname(exe_path);
+    bin_path = dirname(strdup(exe_path));
     install_path = dirname(bin_path);
     printf("Install path: %s\n", install_path);
 
@@ -67,6 +67,14 @@ int main(int argc, char *argv[]) {
         Py_ExitStatusException(status);
     }
 
+    // Set the executable name to match the actual executable
+    status = PyConfig_SetBytesString(&config, &config.executable, exe_path);
+    if (PyStatus_Exception(status)) {
+        // crash_dialog("Unable to set executable name: %s", status.err_msg);
+        PyConfig_Clear(&config);
+        Py_ExitStatusException(status);
+    }
+
     // Determine the app module name. Look for the BRIEFCASE_MAIN_MODULE
     // environment variable first; if that exists, we're probably in test
     // mode. If it doesn't exist, fall back to the MainModule key in the