按编程语言分类

ClangFormat

ClangFormat 是一个统一代码格式的工具，可以通过命令行使用，也可以结合各种 IDE ，适用于 C/C++/Java/JavaScript/JSON/Objective-C/Protobuf/C#，参照官网。

不同 ClangFormat 的版本支持的可配置项不同，所以较新的配置文件在旧版本中会有不识别的现象，不能多版本兼容。

在线预览 clang format 效果：链接
个人用-C ClangFormat
个人用-C++ ClangFormat

Prettier

Prettier 是前端目前常用的代码格式化工具，适用于 JS/TS/CSS/HTML/JSON/MD/MDX/YAML，参照官网。
在线预览 Prettier 效果：链接
个人用 Prettier

按工程分类

Postgresql-C-pgindent

代码在pg发布之前通过pgindent进行格式化，工程中进行格式化如：
src/tools/pgindent/pgindent --indent=src/tools/pg_bsd_indent/pg_bsd_indent src/pl/plisql/src/pl_subproc_function.c

个人常用格式

ClangFormat-C

# Clang-Format approximation of PostgreSQL pgindent style

BasedOnStyle: LLVM

# Indentation and tabs
IndentWidth: 4
TabWidth: 4
UseTab: ForIndentation
ContinuationIndentWidth: 4
IndentCaseLabels: true

# Line length
ColumnLimit: 79

# Braces and control statements
BreakBeforeBraces: Allman
BraceWrapping:
  BeforeElse: true
  BeforeCatch: true
  AfterFunction: true
  AfterControlStatement: true
  AfterNamespace: true
  AfterClass: true
  AfterEnum: true
  SplitEmptyFunction: false
  SplitEmptyRecord: false
  SplitEmptyNamespace: false

# Spaces
SpaceAfterCStyleCast: true
SpaceBeforeParens: ControlStatements
SpacesInParentheses: false
SpacesInSquareBrackets: false
SpaceInEmptyParentheses: false
SpaceBeforeSquareBrackets: false
SpacesBeforeTrailingComments: 4

# Alignment and wrapping
AlignAfterOpenBracket: Align
AlignOperands:   true
AlignConsecutiveAssignments: true
AlignConsecutiveDeclarations: true
AlignTrailingComments: false
BinPackArguments: false
BinPackParameters: false

# Pointers and references
DerivePointerAlignment: false
PointerAlignment: Right
ReferenceAlignment: Right


AlwaysBreakAfterReturnType: AllDefinitions
AlwaysBreakAfterDefinitionReturnType: true

# Preprocessor
IndentPPDirectives: None
SpaceAfterLogicalNot: false

# Comments
ReflowComments: false
CommentPragmas: ''

# Misc C/C++-relevant toggles
AllowShortIfStatementsOnASingleLine: Never
AllowShortLoopsOnASingleLine: false
AllowShortFunctionsOnASingleLine: None
KeepEmptyLinesAtTheStartOfBlocks: false

# Includes
SortIncludes: false
IncludeBlocks: Preserve

ClangFormat-C++

Prettier