Refactor PyLint "inconsistent-return-statements"

platformio/app.py

@@ -198,12 +198,12 @@ class ContentCache(object):
 
     def set(self, key, data, valid):
         if not get_setting("enable_cache"):
-            return
+            return False
         cache_path = self.get_cache_path(key)
         if isfile(cache_path):
             self.delete(key)
         if not data:
-            return
+            return False
         if not isdir(self.cache_dir):
             os.makedirs(self.cache_dir)
         tdmap = {"s": 1, "m": 60, "h": 3600, "d": 86400}
@@ -228,7 +228,7 @@ class ContentCache(object):
     def delete(self, keys=None):
         """ Keys=None, delete expired items """
         if not isfile(self._db_path):
-            return
+            return None
         if not keys:
             keys = []
         if not isinstance(keys, list):

platformio/builder/tools/piolib.py

@@ -693,7 +693,7 @@ def GetLibBuilders(env):  # pylint: disable=too-many-branches
         if lb.name in env.get("LIB_IGNORE", []):
             if verbose:
                 sys.stderr.write("Ignored library %s\n" % lb.path)
-            return
+            return None
         if compat_mode > 1 and not lb.is_platforms_compatible(
                 env['PIOPLATFORM']):
             if verbose:

platformio/builder/tools/piomisc.py

@@ -50,7 +50,7 @@ class InoToCPPConverter(object):
     def convert(self, nodes):
         contents = self.merge(nodes)
         if not contents:
-            return
+            return None
         return self.process(contents)
 
     def merge(self, nodes):

platformio/builder/tools/piowinhooks.py

@@ -72,7 +72,7 @@ def exists(_):
 
 def generate(env):
     if system() != "Windows":
-        return
+        return None
 
     env.Replace(_long_sources_hook=long_sources_hook)
     env.Replace(_long_incflags_hook=long_incflags_hook)

platformio/commands/boards.py

@@ -42,6 +42,7 @@ def cli(query, installed, json_output):  # pylint: disable=R0912
         click.secho(platform, bold=True)
         click.echo("-" * terminal_width)
         print_boards(boards)
+    return True
 
 
 def print_boards(boards):

platformio/commands/device.py

@@ -30,10 +30,8 @@ def cli():
 @cli.command("list", short_help="List devices")
 @click.option("--json-output", is_flag=True)
 def device_list(json_output):
-
     if json_output:
-        click.echo(json.dumps(util.get_serialports()))
-        return
+        return click.echo(json.dumps(util.get_serialports()))
 
     for item in util.get_serialports():
         click.secho(item['port'], fg="cyan")
@@ -42,6 +40,8 @@ def device_list(json_output):
         click.echo("Description: %s" % item['description'])
         click.echo("")
 
+    return True
+
 
 @cli.command("monitor", short_help="Monitor device (Serial)")
 @click.option("--port", "-p", help="Port, a number or a device name")
@@ -154,7 +154,7 @@ def device_monitor(**kwargs):  # pylint: disable=too-many-branches
 def get_project_options(project_dir, environment):
     config = util.load_project_config(project_dir)
     if not config.sections():
-        return
+        return None
 
     known_envs = [s[4:] for s in config.sections() if s.startswith("env:")]
     if environment:
@@ -163,7 +163,7 @@ def get_project_options(project_dir, environment):
         raise exception.UnknownEnvNames(environment, ", ".join(known_envs))
 
     if not known_envs:
-        return
+        return None
 
     if config.has_option("platformio", "env_default"):
         env_default = config.get("platformio",

platformio/commands/lib.py

@@ -143,6 +143,8 @@ def lib_update(lm, libraries, only_check, json_output):
         for library in libraries:
             lm.update(library, only_check=only_check)
 
+    return True
+
 
 def print_lib_item(item):
     click.secho(item['name'], fg="cyan")
@@ -265,11 +267,13 @@ def lib_list(lm, json_output):
         return click.echo(json.dumps(items))
 
     if not items:
-        return
+        return None
 
     for item in sorted(items, key=lambda i: i['name']):
         print_lib_item(item)
 
+    return True
+
 
 @util.memoized
 def get_builtin_libs(storage_names=None):
@@ -308,6 +312,8 @@ def lib_builtin(storage, json_output):
         for item in sorted(storage_['items'], key=lambda i: i['name']):
             print_lib_item(item)
 
+    return True
+
 
 @cli.command("show", short_help="Show detailed info about a library")
 @click.argument("library", metavar="[LIBRARY]")
@@ -381,6 +387,8 @@ def lib_show(library, json_output):
         for row in rows:
             click.echo(row)
 
+    return True
+
 
 @cli.command("register", short_help="Register a new library")
 @click.argument("config_url")
@@ -468,3 +476,5 @@ def lib_stats(json_output):
         for item in result.get(key, []):
             _print_lib_item(item)
         click.echo()
+
+    return True

platformio/commands/platform.py

@@ -257,7 +257,7 @@ def platform_show(platform, json_output):  # pylint: disable=too-many-branches
         click.echo("Frameworks: %s" % ", ".join(data['frameworks']))
 
     if not data['packages']:
-        return
+        return None
 
     if not isinstance(data['packages'][0], dict):
         click.echo("Packages: %s" % ", ".join(data['packages']))
@@ -287,6 +287,8 @@ def platform_show(platform, json_output):  # pylint: disable=too-many-branches
         click.echo("------")
         print_boards(data['boards'])
 
+    return True
+
 
 @cli.command("install", short_help="Install new development platform")
 @click.argument("platforms", nargs=-1, required=True, metavar="[PLATFORM...]")
@@ -375,3 +377,5 @@ def platform_update(platforms, only_packages, only_check, json_output):
             pm.update(
                 platform, only_packages=only_packages, only_check=only_check)
             click.echo()
+
+    return True

platformio/commands/upgrade.py

@@ -93,6 +93,8 @@ WARNING! Don't use `sudo` for the rest PlatformIO commands.
             raise exception.UpgradeError("\n".join(
                 [str(cmd), r['out'], r['err']]))
 
+    return True
+
 
 def get_latest_version():
     try:

platformio/managers/core.py

@@ -42,7 +42,12 @@ class CorePackageManager(PackageManager):
             ("" if sys.version_info < (2, 7, 9) else "s")
         ])
 
-    def install(self, name, requirements=None, *args, **kwargs):
+    def install(  # pylint: disable=keyword-arg-before-vararg
+            self,
+            name,
+            requirements=None,
+            *args,
+            **kwargs):
         PackageManager.install(self, name, requirements, *args, **kwargs)
         self.cleanup_packages()
         return self.get_package_dir(name, requirements)
@@ -126,3 +131,5 @@ def pioplus_call(args, **kwargs):
 
     if code != 0:
         raise exception.ReturnErrorCode(1)
+
+    return True

platformio/managers/lib.py

@@ -256,10 +256,10 @@ class LibraryManager(BasePkgManager):
         except exception.InternetIsOffline as e:
             if not silent:
                 click.secho(str(e), fg="yellow")
-            return
+            return None
 
         if not pkg_dir:
-            return
+            return None
 
         manifest = self.load_manifest(pkg_dir)
         if "dependencies" not in manifest:

platformio/managers/package.py

@@ -384,7 +384,7 @@ class PkgInstallerMixin(object):
         finally:
             if isdir(tmp_dir):
                 util.rmtree_(tmp_dir)
-        return
+        return None
 
     def _update_src_manifest(self, data, src_dir):
         if not isdir(src_dir):
@@ -603,18 +603,17 @@ class BasePkgManager(PkgRepoMixin, PkgInstallerMixin):
                 requirements=None,
                 silent=False,
                 trigger_event=True):
+        name, requirements, url = self.parse_pkg_uri(name, requirements)
+        package_dir = self.get_package_dir(name, requirements, url)
 
         # avoid circle dependencies
         if not self.INSTALL_HISTORY:
             self.INSTALL_HISTORY = []
         history_key = "%s-%s" % (name, requirements) if requirements else name
         if history_key in self.INSTALL_HISTORY:
-            return
+            return package_dir
         self.INSTALL_HISTORY.append(history_key)
 
-        name, requirements, url = self.parse_pkg_uri(name, requirements)
-        package_dir = self.get_package_dir(name, requirements, url)
-
         if not package_dir or not silent:
             msg = "Installing " + click.style(name, fg="cyan")
             if requirements:
@@ -714,7 +713,7 @@ class BasePkgManager(PkgRepoMixin, PkgInstallerMixin):
             nl=False)
         if not util.internet_on():
             click.echo("[%s]" % (click.style("Off-line", fg="yellow")))
-            return
+            return None
 
         latest = self.outdated(pkg_dir, requirements)
         if latest:
@@ -725,7 +724,7 @@ class BasePkgManager(PkgRepoMixin, PkgInstallerMixin):
             click.echo("[%s]" % (click.style("Fixed", fg="yellow")))
 
         if only_check or not latest:
-            return
+            return True
 
         if "__src_url" in manifest:
             vcs = VCSClientFactory.newClient(pkg_dir, manifest['__src_url'])

platformio/managers/platform.py

@@ -672,7 +672,7 @@ class PlatformBoardConfig(object):
 
     def get_debug_data(self):
         if not self._manifest.get("debug", {}).get("tools"):
-            return
+            return None
         tools = {}
         for name, options in self._manifest['debug']['tools'].items():
             tools[name] = {}

platformio/telemetry.py

@@ -407,3 +407,4 @@ def resend_backuped_reports():
     # clean
     tm['backup'] = []
     app.set_state_item("telemetry", tm)
+    return True