Add indent

.clang-format

@@ -0,0 +1,175 @@
+#
+# The clang-format (Clang 6) style file used by deal.II.
+#
+
+AccessModifierOffset: -2
+
+AlignAfterOpenBracket: Align
+AlignConsecutiveAssignments: true
+AlignConsecutiveDeclarations: true
+AlignEscapedNewlines: Left
+AlignOperands: true
+AlignTrailingComments: true
+
+AllowAllParametersOfDeclarationOnNextLine: false
+AllowShortBlocksOnASingleLine: false
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: None
+AllowShortIfStatementsOnASingleLine: false
+AllowShortLoopsOnASingleLine: false
+
+AlwaysBreakAfterReturnType: All
+AlwaysBreakBeforeMultilineStrings: false
+AlwaysBreakTemplateDeclarations: true
+
+BinPackArguments: false
+BinPackParameters: false
+
+BraceWrapping:
+  AfterClass: true
+  AfterControlStatement: true
+  AfterEnum: true
+  AfterExternBlock: true
+  AfterFunction: true
+  AfterNamespace: true
+  AfterStruct: true
+  AfterUnion: true
+  BeforeCatch: true
+  BeforeElse: true
+  IndentBraces: true
+  SplitEmptyFunction: false
+  SplitEmptyRecord: false
+  SplitEmptyNamespace: false
+
+BreakBeforeBinaryOperators: None
+BreakBeforeBraces: Custom
+BreakBeforeInheritanceComma: false
+BreakBeforeTernaryOperators: false
+BreakConstructorInitializers: BeforeComma
+BreakStringLiterals: false
+
+ColumnLimit: 80
+
+CompactNamespaces: false
+
+ConstructorInitializerIndentWidth: 2
+
+ContinuationIndentWidth: 2
+
+Cpp11BracedListStyle: true
+
+DerivePointerAlignment: false
+
+FixNamespaceComments: true
+
+IncludeBlocks: Regroup
+IncludeCategories:
+# config.h must always be first:
+  - Regex:    "deal.II/base/config.h"
+    Priority: -1
+# deal.II folders in sorted order:
+  - Regex:    "deal.II/algorithms/.*\\.h"
+    Priority: 110
+  - Regex:    "deal.II/base/.*\\.h"
+    Priority: 120
+  - Regex:    "deal.II/boost_adaptors/.*\\.h"
+    Priority: 125
+  - Regex:    "deal.II/differentiation/.*\\.h"
+    Priority: 130
+  - Regex:    "deal.II/distributed/.*\\.h"
+    Priority: 140
+  - Regex:    "deal.II/dofs/.*\\.h"
+    Priority: 150
+  - Regex:    "deal.II/fe/.*\\.h"
+    Priority: 160
+  - Regex:    "deal.II/gmsh/.*\\.h"
+    Priority: 170
+  - Regex:    "deal.II/grid/.*\\.h"
+    Priority: 180
+  - Regex:    "deal.II/hp/.*\\.h"
+    Priority: 190
+  - Regex:    "deal.II/integrators/.*\\.h"
+    Priority: 200
+  - Regex:    "deal.II/lac/.*\\.h"
+    Priority: 210
+  - Regex:    "deal.II/matrix_free/.*\\.h"
+    Priority: 220
+  - Regex:    "deal.II/meshworker/.*\\.h"
+    Priority: 230
+  - Regex:    "deal.II/multigrid/.*\\.h"
+    Priority: 240
+  - Regex:    "deal.II/non_matching/.*\\.h"
+    Priority: 250
+  - Regex:    "deal.II/numerics/.*\\.h"
+    Priority: 260
+  - Regex:    "deal.II/opencascade/.*\\.h"
+    Priority: 270
+  - Regex:    "deal.II/optimization/.*\\.h"
+    Priority: 280
+  - Regex:    "deal.II/particles/.*\\.h"
+    Priority: 290
+  - Regex:    "deal.II/physics/.*\\.h"
+    Priority: 300
+  - Regex:    "deal.II/sundials/.*\\.h"
+    Priority: 310
+# put boost right after deal:
+  - Regex: "<boost.*>"
+    Priority: 500
+# try to group PETSc headers:
+  - Regex: "<petsc.*\\.h>"
+    Priority: 1000
+# try to catch all third party headers and put them after deal.II but before
+# standard headers:
+  - Regex: "<.*\\.(h|hpp|hxx)>"
+    Priority: 2000
+# match all standard headers. Things like '#include <armadillo>' should be
+# surrounded by #ifdef checks (which will not be merged by clang-format) so they
+# should not be caught here
+  - Regex: "<[a-z_]+>"
+    Priority: 100000
+# make sure that "../tests.h" appears before all other local include files
+# such that replacing Assert in tests also applies to the testing header files.
+  - Regex: "\\.\\./tests\\.h"
+    Priority: 200000
+
+IndentCaseLabels: true
+IndentPPDirectives: AfterHash
+IndentWidth: 2
+
+IndentWrappedFunctionNames: false
+
+KeepEmptyLinesAtTheStartOfBlocks: false
+
+Language: Cpp
+
+MaxEmptyLinesToKeep: 3
+
+NamespaceIndentation: All
+
+PenaltyBreakBeforeFirstCallParameter: 90
+
+PointerAlignment: Right
+
+ReflowComments: true
+CommentPragmas: '( \| |\*--|<li>|@ref | @p |@param |@name |@returns |@warning |@ingroup |@author |@date |@related |@relates |@relatesalso |@deprecated |@image |@return |@brief |@attention |@copydoc |@addtogroup |@todo |@tparam |@see |@note |@skip |@skipline |@until |@line |@dontinclude |@include)'
+
+SortIncludes: true
+SortUsingDeclarations: true
+
+SpaceAfterCStyleCast: false
+SpaceAfterTemplateKeyword: true
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeParens: ControlStatements
+SpaceInEmptyParentheses: false
+SpacesBeforeTrailingComments: 1
+SpacesInAngles: false
+SpacesInCStyleCastParentheses: false
+SpacesInContainerLiterals: false
+SpacesInParentheses: false
+SpacesInSquareBrackets: false
+
+Standard: Cpp11
+
+TabWidth: 2
+
+UseTab: Never

.github/workflows/indentation.yml

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+name: Indent
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Check indentation
+      run: |
+         ./scripts/dr.sh ./scripts/check_indentation.sh 

scripts/check_indentation.sh

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+#!/bin/sh
+./scripts/indent
+git diff
+git diff-files --quiet 

scripts/indent

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+#!/bin/bash
+## ---------------------------------------------------------------------
+##
+## Copyright (C) 2012 - 2013, 2015 by the deal.II authors
+##
+## This file is part of the deal.II library.
+##
+## The deal.II library is free software; you can use it, redistribute
+## it, and/or modify it under the terms of the GNU Lesser General
+## Public License as published by the Free Software Foundation; either
+## version 2.1 of the License, or (at your option) any later version.
+## The full text of the license can be found in the file LICENSE at
+## the top level of the deal.II distribution.
+##
+## ---------------------------------------------------------------------
+
+if test ! -d source ; then
+  echo "*** This script must be run from the top-level directory of your project."
+  exit
+fi
+
+if test ! -f .clang-format ; then
+  echo "*** No style file .clang-format found."
+  exit
+fi
+
+
+# loop over all directories in which we may have source files;
+# collect a list of files and then spawn a parallel process to
+# indent all of them
+echo "--- Indenting all header and source files"
+SRC_FILES=`find . -name "*.cc"`
+H_FILES=`find . -name "*.h"`
+clang-format -i $SRC_FILES
+clang-format -i $H_FILES