Switch to the new "pio pkg install" command

scripts/install_devplatforms.py

@@ -33,9 +33,7 @@ import click
 )
 def main(desktop, ignore, ownernames):
     platforms = json.loads(
-        subprocess.check_output(
-            ["platformio", "platform", "search", "--json-output"]
-        ).decode()
+        subprocess.check_output(["pio", "platform", "search", "--json-output"]).decode()
     )
     ignore = [n.strip() for n in (ignore or "").split(",") if n.strip()]
     ownernames = [n.strip() for n in (ownernames or "").split(",") if n.strip()]
@@ -47,7 +45,16 @@ def main(desktop, ignore, ownernames):
         ]
         if any(skip):
             continue
-        subprocess.check_call(["platformio", "platform", "install", platform["name"]])
+        subprocess.check_call(
+            [
+                "pio",
+                "pkg",
+                "install",
+                "--global",
+                "--platform",
+                "{ownername}/{name}".format(**platform),
+            ]
+        )
 
 
 if __name__ == "__main__":

tox.ini

@@ -40,12 +40,12 @@ commands =
 [testenv:testcore]
 commands =
     {envpython} --version
-    py.test -v --basetemp="{envtmpdir}" -k "not skip_ci" tests --ignore tests/test_examples.py
+    py.test -v -k "not skip_ci" tests --ignore tests/test_examples.py
 
 [testenv:testexamples]
 commands =
     {envpython} scripts/install_devplatforms.py
-    py.test -v --basetemp="{envtmpdir}" tests/test_examples.py
+    py.test -v tests/test_examples.py
 
 [testenv:docs]
 ; basepython = ~/.pyenv/versions/3.6.12/bin/python