Add clang-format file

People should run `make format` before doing a commit.
Fix https://github.com/profanity-im/profanity/issues/1396

.clang-format

@@ -0,0 +1,33 @@
+Language: Cpp
+BasedOnStyle: GNU
+SpaceAfterCStyleCast: false
+SpaceAfterLogicalNot: false
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeSquareBrackets: false
+SpaceInEmptyBlock: false
+SpaceInEmptyParentheses: false
+SpacesInCStyleCastParentheses: false
+SpacesInConditionalStatement: false
+SpacesInContainerLiterals: false
+SpacesInParentheses: false
+SpacesInSquareBrackets: false
+SpaceBeforeParens: ControlStatements
+ColumnLimit: 0
+PointerAlignment: Left
+AlignAfterOpenBracket: Align
+AlignConsecutiveMacros: true
+AlignEscapedNewlines: Left
+AlignOperands: true
+AlignTrailingComments: true
+AllowAllArgumentsOnNextLine: true
+AllowShortBlocksOnASingleLine: true
+IndentWidth: 4
+BreakBeforeBraces: Custom
+BraceWrapping:
+  AfterCaseLabel: true
+  AfterControlStatement: Never
+  AfterFunction: true
+  BeforeElse: false
+  #BeforeWhile: false
+  AfterStruct: true
+#BreakStringLiterals: true

CONTRIBUTING.md

@@ -3,6 +3,11 @@
 ## Coding style
 Follow the style already present ;-)
 
+To make this easier for you we created a `.clang-format` file.
+You'll need to have `clang-format` installed.
+
+Then just run `make format` before you do any commit.
+
 ## Pull Requests
 Before submitting a Pull Request please run valgrind and the clang static code analyzer.
 

Makefile.am

@@ -237,6 +237,13 @@ core_sources += $(omemo_sources)
 unittest_sources += $(omemo_unittest_sources)
 endif
 
+all_c_sources = $(core_sources) $(unittest_sources) \
+				$(pgp_sources) $(pgp_unittest_sources) \
+				$(otr3_sources) $(otr4_sources) $(otr_unittest_sources) \
+				$(omemo_sources) $(omemo_unittest_sources) \
+				$(c_sources) $(python_sources) \
+				$(main_source)
+
 AM_CFLAGS = @AM_CFLAGS@ -I$(srcdir)/src
 
 bin_PROGRAMS = profanity
@@ -324,3 +331,6 @@ endif
 
 check-unit: tests/unittests/unittests
 	tests/unittests/unittests
+
+format: $(all_c_sources)
+	clang-format -i $(all_c_sources)