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+" Author: vdeurzen <tim@kompiler.org>, w0rp <devw0rp@gmail.com>,
+" gagbo <gagbobada@gmail.com>, Andrej Radovic <r.andrej@gmail.com>
+" Description: clang-tidy linter for c files
+
+call ale#Set('c_clangtidy_executable', 'clang-tidy')
+" Set this option to check the checks clang-tidy will apply.
+" The number of checks that can be applied to C files is limited in contrast to
+" C++
+"
+" Here is an incomplete list of C-compatible checks for clang-tidy version 6:
+" bugprone-suspicious-memset-usage
+" cert-env33-c
+" cert-err34-c
+" cert-flp30-c
+" google-runtime-int
+" llvm-header-guard
+" llvm-include-order
+" misc-argument-comment
+" misc-assert-side-effect
+" misc-bool-pointer-implicit-conversion
+" misc-definitions-in-headers
+" misc-incorrect-roundings
+" misc-macro-parentheses
+" misc-macro-repeated-side-effects
+" misc-misplaced-const
+" misc-misplaced-widening-cast
+" misc-multiple-statement-macro
+" misc-non-copyable-objects
+" misc-redundant-expression
+" misc-sizeof-expression
+" misc-static-assert
+" misc-string-literal-with-embedded-nul
+" misc-suspicious-enum-usage
+" misc-suspicious-missing-comma
+" misc-suspicious-semicolon
+" misc-suspicious-string-compare
+" misc-swapped-arguments
+" modernize-redundant-void-arg
+" modernize-use-bool-literals
+" performance-type-promotion-in-math-fn
+" readability-braces-around-statements
+" readability-else-after-return
+" readability-function-size
+" readability-identifier-naming
+" readability-implicit-bool-cast
+" readability-inconsistent-declaration-parameter-name
+" readability-misleading-indentation
+" readability-misplaced-array-index
+" readability-named-parameter
+" readability-non-const-parameter
+" readability-redundant-control-flow
+" readability-redundant-declaration
+" readability-redundant-function-ptr-dereference
+" readability-simplify-boolean-expr
+
+call ale#Set('c_clangtidy_checks', ['*'])
+" Set this option to manually set some options for clang-tidy.
+" This will disable compile_commands.json detection.
+call ale#Set('c_clangtidy_options', '')
+call ale#Set('c_build_dir', '')
+
+function! ale_linters#c#clangtidy#GetExecutable(buffer) abort
+ return ale#Var(a:buffer, 'c_clangtidy_executable')
+endfunction
+
+function! s:GetBuildDirectory(buffer) abort
+ " Don't include build directory for header files, as compile_commands.json
+ " files don't consider headers to be translation units, and provide no
+ " commands for compiling header files.
+ if expand('#' . a:buffer) =~# '\v\.(h|hpp)$'
+ return ''
+ endif
+
+ let l:build_dir = ale#Var(a:buffer, 'c_build_dir')
+
+ " c_build_dir has the priority if defined
+ if !empty(l:build_dir)
+ return l:build_dir
+ endif
+
+ return ale#c#FindCompileCommands(a:buffer)
+endfunction
+
+function! ale_linters#c#clangtidy#GetCommand(buffer) abort
+ let l:checks = join(ale#Var(a:buffer, 'c_clangtidy_checks'), ',')
+ let l:build_dir = s:GetBuildDirectory(a:buffer)
+
+ " Get the extra options if we couldn't find a build directory.
+ let l:options = empty(l:build_dir)
+ \ ? ale#Var(a:buffer, 'c_clangtidy_options')
+ \ : ''
+
+ return ale#Escape(ale_linters#c#clangtidy#GetExecutable(a:buffer))
+ \ . (!empty(l:checks) ? ' -checks=' . ale#Escape(l:checks) : '')
+ \ . ' %s'
+ \ . (!empty(l:build_dir) ? ' -p ' . ale#Escape(l:build_dir) : '')
+ \ . (!empty(l:options) ? ' -- ' . l:options : '')
+endfunction
+
+call ale#linter#Define('c', {
+\ 'name': 'clangtidy',
+\ 'output_stream': 'stdout',
+\ 'executable_callback': 'ale_linters#c#clangtidy#GetExecutable',
+\ 'command_callback': 'ale_linters#c#clangtidy#GetCommand',
+\ 'callback': 'ale#handlers#gcc#HandleGCCFormat',
+\ 'lint_file': 1,
+\})