Drop Python 2 from PIO Core test

.github/workflows/core.yml

@@ -8,7 +8,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: [2.7, 3.7, 3.8]
+        python-version: [3.6, 3.7, 3.8, 3.9]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v2

.pylintrc

@@ -14,7 +14,6 @@ disable=
     too-few-public-methods,
     useless-object-inheritance,
     useless-import-alias,
-    fixme,
     bad-option-value,
 
     ; PY2 Compat

platformio/builder/tools/compilation_db.py

@@ -41,7 +41,7 @@ from platformio.proc import where_is_program
 # should hold the compilation database, otherwise, the file defaults to compile_commands.json,
 # which is the name that most clang tools search for by default.
 
-# TODO: Is there a better way to do this than this global? Right now this exists so that the
+# Is there a better way to do this than this global? Right now this exists so that the
 # emitter we add can record all of the things it emits, so that the scanner for the top level
 # compilation database can access the complete list, and also so that the writer has easy
 # access to write all of the files. But it seems clunky. How can the emitter and the scanner
@@ -104,7 +104,7 @@ def makeEmitCompilationDbEntry(comstr):
             __COMPILATIONDB_ENV=env,
         )
 
-        # TODO: Technically, these next two lines should not be required: it should be fine to
+        # Technically, these next two lines should not be required: it should be fine to
         # cache the entries. However, they don't seem to update properly. Since they are quick
         # to re-generate disable caching and sidestep this problem.
         env.AlwaysBuild(entry)

platformio/compat.py

@@ -67,9 +67,9 @@ def ensure_python3(raise_exception=True):
         return compatible
     raise UserSideException(
         "Python 3.6 or later is required for this operation. \n"
-        "Please install the latest Python 3 and reinstall PlatformIO Core using "
-        "installation script:\n"
-        "https://docs.platformio.org/page/core/installation.html"
+        "Please check a migration guide:\n"
+        "https://docs.platformio.org/en/latest/core/migration.html"
+        "#drop-support-for-python-2-and-3-5"
     )
 
 

platformio/maintenance.py

@@ -53,7 +53,7 @@ def on_platformio_start(ctx, force, caller):
         click.secho(
             """
 Python 2 and Python 3.5 are not compatible with PlatformIO Core 5.0.
-Please check the migration guide on how to fix this warning message:
+Please check a migration guide on how to fix this warning message:
 """,
             fg="yellow",
         )