[build] Upgrade CI to clang-format 10.0 (#1961)

MacOS no longer ships 6.0, and Arch Linux's mesa GPU drivers are no longer compatible with LLVM 6.0.

.clang-format

@@ -3,24 +3,29 @@ Language:        Cpp
 BasedOnStyle:  Google
 AccessModifierOffset: -1
 AlignAfterOpenBracket: Align
+AlignConsecutiveMacros: false
 AlignConsecutiveAssignments: false
 AlignConsecutiveDeclarations: false
 AlignEscapedNewlines: Left
 AlignOperands:   true
 AlignTrailingComments: true
+AllowAllArgumentsOnNextLine: true
+AllowAllConstructorInitializersOnNextLine: true
 AllowAllParametersOfDeclarationOnNextLine: true
-AllowShortBlocksOnASingleLine: false
+AllowShortBlocksOnASingleLine: Never
 AllowShortCaseLabelsOnASingleLine: false
 AllowShortFunctionsOnASingleLine: All
-AllowShortIfStatementsOnASingleLine: true
+AllowShortLambdasOnASingleLine: All
+AllowShortIfStatementsOnASingleLine: WithoutElse
 AllowShortLoopsOnASingleLine: true
 AlwaysBreakAfterDefinitionReturnType: None
 AlwaysBreakAfterReturnType: None
 AlwaysBreakBeforeMultilineStrings: true
-AlwaysBreakTemplateDeclarations: true
+AlwaysBreakTemplateDeclarations: Yes
 BinPackArguments: true
 BinPackParameters: true
 BraceWrapping:
+  AfterCaseLabel:  false
   AfterClass:      false
   AfterControlStatement: false
   AfterEnum:       false
@@ -29,6 +34,7 @@ BraceWrapping:
   AfterObjCDeclaration: false
   AfterStruct:     false
   AfterUnion:      false
+  AfterExternBlock: false
   BeforeCatch:     false
   BeforeElse:      false
   IndentBraces:    false
@@ -38,6 +44,7 @@ BraceWrapping:
 BreakBeforeBinaryOperators: None
 BreakBeforeBraces: Attach
 BreakBeforeInheritanceComma: false
+BreakInheritanceList: BeforeColon
 BreakBeforeTernaryOperators: true
 BreakConstructorInitializersBeforeComma: false
 BreakConstructorInitializers: BeforeColon
@@ -50,6 +57,7 @@ ConstructorInitializerAllOnOneLineOrOnePerLine: true
 ConstructorInitializerIndentWidth: 4
 ContinuationIndentWidth: 4
 Cpp11BracedListStyle: true
+DeriveLineEnding: false
 DerivePointerAlignment: false
 DisableFormat:   false
 ExperimentalAutoDetectBinPacking: false
@@ -58,15 +66,25 @@ ForEachMacros:
   - foreach
   - Q_FOREACH
   - BOOST_FOREACH
+IncludeBlocks:   Regroup
 IncludeCategories:
+  - Regex:           '^<ext/.*\.h>'
+    Priority:        2
+    SortPriority:    0
   - Regex:           '^<.*\.h>'
     Priority:        1
+    SortPriority:    0
   - Regex:           '^<.*'
     Priority:        2
+    SortPriority:    0
   - Regex:           '.*'
     Priority:        3
+    SortPriority:    0
 IncludeIsMainRegex: '([-_](test|unittest))?$'
+IncludeIsMainSourceRegex: ''
 IndentCaseLabels: true
+IndentGotoLabels: true
+IndentPPDirectives: None
 IndentWidth:     2
 IndentWrappedFunctionNames: false
 JavaScriptQuotes: Leave
@@ -76,32 +94,74 @@ MacroBlockBegin: ''
 MacroBlockEnd:   ''
 MaxEmptyLinesToKeep: 1
 NamespaceIndentation: None
+ObjCBinPackProtocolList: Never
 ObjCBlockIndentWidth: 2
 ObjCSpaceAfterProperty: false
-ObjCSpaceBeforeProtocolList: false
+ObjCSpaceBeforeProtocolList: true
 PenaltyBreakAssignment: 2
 PenaltyBreakBeforeFirstCallParameter: 1
 PenaltyBreakComment: 300
 PenaltyBreakFirstLessLess: 120
 PenaltyBreakString: 1000
+PenaltyBreakTemplateDeclaration: 10
 PenaltyExcessCharacter: 1000000
 PenaltyReturnTypeOnItsOwnLine: 200
 PointerAlignment: Left
+RawStringFormats:
+  - Language:        Cpp
+    Delimiters:
+      - cc
+      - CC
+      - cpp
+      - Cpp
+      - CPP
+      - 'c++'
+      - 'C++'
+    CanonicalDelimiter: ''
+    BasedOnStyle:    google
+  - Language:        TextProto
+    Delimiters:
+      - pb
+      - PB
+      - proto
+      - PROTO
+    EnclosingFunctions:
+      - EqualsProto
+      - EquivToProto
+      - PARSE_PARTIAL_TEXT_PROTO
+      - PARSE_TEST_PROTO
+      - PARSE_TEXT_PROTO
+      - ParseTextOrDie
+      - ParseTextProtoOrDie
+    CanonicalDelimiter: ''
+    BasedOnStyle:    google
 ReflowComments:  true
 SortIncludes:    false
 SortUsingDeclarations: true
 SpaceAfterCStyleCast: false
+SpaceAfterLogicalNot: false
 SpaceAfterTemplateKeyword: true
 SpaceBeforeAssignmentOperators: true
+SpaceBeforeCpp11BracedList: false
+SpaceBeforeCtorInitializerColon: true
+SpaceBeforeInheritanceColon: true
 SpaceBeforeParens: ControlStatements
+SpaceBeforeRangeBasedForLoopColon: true
+SpaceInEmptyBlock: false
 SpaceInEmptyParentheses: false
 SpacesBeforeTrailingComments: 2
 SpacesInAngles:  false
+SpacesInConditionalStatement: false
 SpacesInContainerLiterals: true
 SpacesInCStyleCastParentheses: false
 SpacesInParentheses: false
 SpacesInSquareBrackets: false
+SpaceBeforeSquareBrackets: false
 Standard:        Auto
+StatementMacros:
+  - Q_UNUSED
+  - QT_REQUIRE_VERSION
 TabWidth:        8
+UseCRLF:         false
 UseTab:          Never
 ...