Add clang-format linter to descriptor files

Modifies the c and cpp descriptor files so clang-format is added to them.

In addition this modifies the c and cpp test files so clang-format now
passes.

.automation/test/c/c_bad_01.c

@@ -1,6 +1,7 @@
 #include <iostream>
 
-int main() {
+int main()
+{
     std::cout << "Hello World!";
     return 0;
 }

.automation/test/c/c_bad_02.c

@@ -1,6 +1,7 @@
 #include <iostream>
 
-int main() {
+int main()
+{
     std::cout << "Hello World!";
     return 0;
 }

.automation/test/c/c_good_01.c

@@ -2,7 +2,7 @@
 
 #include <stdio.h>
 int main() {
-    // printf() displays the string inside quotation
-    printf("Hello, World!");
-    return 0;
+  // printf() displays the string inside quotation
+  printf("Hello, World!");
+  return 0;
 }

.automation/test/c/c_good_02.c

@@ -2,7 +2,7 @@
 
 #include <stdio.h>
 int main() {
-    // printf() displays the string inside quotation
-    printf("Hello, World!");
-    return 0;
+  // printf() displays the string inside quotation
+  printf("Hello, World!");
+  return 0;
 }

.automation/test/cpp/cpp_good_01.cpp

@@ -2,7 +2,7 @@
 
 #include <stdio.h>
 int main() {
-    // printf() displays the string inside quotation
-    printf("Hello, World!");
-    return 0;
+  // printf() displays the string inside quotation
+  printf("Hello, World!");
+  return 0;
 }

.automation/test/cpp/cpp_good_02.cpp

@@ -2,7 +2,7 @@
 
 #include <stdio.h>
 int main() {
-    // printf() displays the string inside quotation
-    printf("Hello, World!");
-    return 0;
+  // printf() displays the string inside quotation
+  printf("Hello, World!");
+  return 0;
 }

CHANGELOG.md

@@ -8,6 +8,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 Note: Can be used with `oxsecurity/megalinter@beta` in your GitHub Action mega-linter.yml file, or with `oxsecurity/megalinter:beta` docker image
 
+- New linters
+  - Add [clang-format](https://releases.llvm.org/16.0.0/tools/clang/docs/ClangFormat.html) c & cpp formatting linter
+
 - Allow to use value `any` to always activate a linter who as a **_DIRECTORY** variable. Example: `KUBERNETES_DIRECTORY: any`
 - New flavor **c_cpp**: New flavor for pure C/C++ projects
 

megalinter/descriptors/c.megalinter-descriptor.yml

@@ -24,3 +24,33 @@ linters:
     install:
       pip:
         - cpplint
+
+  - linter_name: clang-format
+    name: C_CLANG_FORMAT
+    descriptor_flavors:
+      - c_cpp
+    linter_url: https://releases.llvm.org/16.0.0/tools/clang/docs/ClangFormat.html
+    linter_repo: https://github.com/llvm/llvm-project
+    linter_rules_url: https://releases.llvm.org/16.0.0/tools/clang/docs/ClangFormat.html
+    linter_rules_inline_disable_url: https://releases.llvm.org/16.0.0/tools/clang/docs/ClangFormatStyleOptions.html#disabling-formatting-on-a-piece-of-code
+    cli_lint_mode: list_of_files
+    cli_help_arg_name: "--help"
+    cli_lint_extra_args:
+      - "--Werror"
+      - "--dry-run"
+    config_file_name: .clang-format
+    cli_config_arg_name: "--style"
+    cli_lint_errors_count: regex_count
+    cli_lint_errors_regex: "code should be clang-formatted"
+    examples:
+      - "clang-format --Werror --dry-run myfile.c"
+    install:
+      apk:
+        - clang16-extra-tools
+    ide:
+      vscode:
+        name: Clang-Format
+        url: https://marketplace.visualstudio.com/items?itemName=xaver.clang-format
+      emacs:
+        name: clang-format
+        url: https://releases.llvm.org/16.0.0/tools/clang/docs/ClangFormat.html#emacs-integration

megalinter/descriptors/cpp.megalinter-descriptor.yml

@@ -34,3 +34,33 @@ linters:
     install:
       pip:
         - cpplint
+
+  - linter_name: clang-format
+    name: CPP_CLANG_FORMAT
+    descriptor_flavors:
+      - c_cpp
+    linter_url: https://releases.llvm.org/16.0.0/tools/clang/docs/ClangFormat.html
+    linter_repo: https://github.com/llvm/llvm-project
+    linter_rules_url: https://releases.llvm.org/16.0.0/tools/clang/docs/ClangFormat.html
+    linter_rules_inline_disable_url: https://releases.llvm.org/16.0.0/tools/clang/docs/ClangFormatStyleOptions.html#disabling-formatting-on-a-piece-of-code
+    cli_lint_mode: list_of_files
+    cli_help_arg_name: "--help"
+    cli_lint_extra_args:
+      - "--Werror"
+      - "--dry-run"
+    config_file_name: .clang-format
+    cli_config_arg_name: "--style"
+    cli_lint_errors_count: regex_count
+    cli_lint_errors_regex: "code should be clang-formatted"
+    examples:
+      - "clang-format --Werror --dry-run myfile.cpp"
+    install:
+      apk:
+        - clang16-extra-tools
+    ide:
+      vscode:
+        name: Clang-Format
+        url: https://marketplace.visualstudio.com/items?itemName=xaver.clang-format
+      emacs:
+        name: clang-format
+        url: https://releases.llvm.org/16.0.0/tools/clang/docs/ClangFormat.html#emacs-integration