Update README and add more pre-commit checks

.clang-format

@@ -1,12 +1,12 @@
 ---
-Language:        Cpp
+Language: Cpp
 # BasedOnStyle:  Google
 AccessModifierOffset: -1
 AlignAfterOpenBracket: Align
 AlignConsecutiveAssignments: false
 AlignConsecutiveDeclarations: false
 AlignEscapedNewlinesLeft: true
-AlignOperands:   true
+AlignOperands: true
 AlignTrailingComments: true
 AllowAllParametersOfDeclarationOnNextLine: true
 AllowShortBlocksOnASingleLine: false
@@ -21,49 +21,49 @@ AlwaysBreakTemplateDeclarations: true
 BinPackArguments: true
 BinPackParameters: true
 BraceWrapping:
-  AfterClass:      false
-  AfterControlStatement: false
-  AfterEnum:       false
-  AfterFunction:   false
-  AfterNamespace:  false
-  AfterObjCDeclaration: false
-  AfterStruct:     false
-  AfterUnion:      false
-  BeforeCatch:     false
-  BeforeElse:      false
-  IndentBraces:    false
+    AfterClass: false
+    AfterControlStatement: false
+    AfterEnum: false
+    AfterFunction: false
+    AfterNamespace: false
+    AfterObjCDeclaration: false
+    AfterStruct: false
+    AfterUnion: false
+    BeforeCatch: false
+    BeforeElse: false
+    IndentBraces: false
 BreakBeforeBinaryOperators: None
 BreakBeforeBraces: Attach
 BreakBeforeTernaryOperators: true
 BreakConstructorInitializersBeforeComma: false
 BreakAfterJavaFieldAnnotations: false
 BreakStringLiterals: true
-ColumnLimit:     80
-CommentPragmas:  '^ IWYU pragma:'
+ColumnLimit: 80
+CommentPragmas: "^ IWYU pragma:"
 ConstructorInitializerAllOnOneLineOrOnePerLine: true
 ConstructorInitializerIndentWidth: 4
 ContinuationIndentWidth: 4
 Cpp11BracedListStyle: true
 DerivePointerAlignment: true
-DisableFormat:   false
+DisableFormat: false
 ExperimentalAutoDetectBinPacking: false
-ForEachMacros:   [ foreach, Q_FOREACH, BOOST_FOREACH ]
+ForEachMacros: [foreach, Q_FOREACH, BOOST_FOREACH]
 IncludeCategories:
-  - Regex:           '^<.*\.h>'
-    Priority:        1
-  - Regex:           '^<.*'
-    Priority:        2
-  - Regex:           '.*'
-    Priority:        3
-IncludeIsMainRegex: '([-_](test|unittest))?$'
+    - Regex: '^<.*\.h>'
+      Priority: 1
+    - Regex: "^<.*"
+      Priority: 2
+    - Regex: ".*"
+      Priority: 3
+IncludeIsMainRegex: "([-_](test|unittest))?$"
 IndentCaseLabels: true
-IndentWidth:     2
+IndentWidth: 2
 IndentWrappedFunctionNames: false
 JavaScriptQuotes: Leave
 JavaScriptWrapImports: true
 KeepEmptyLinesAtTheStartOfBlocks: false
-MacroBlockBegin: ''
-MacroBlockEnd:   ''
+MacroBlockBegin: ""
+MacroBlockEnd: ""
 MaxEmptyLinesToKeep: 1
 NamespaceIndentation: None
 ObjCBlockIndentWidth: 2
@@ -76,23 +76,22 @@ PenaltyBreakString: 1000
 PenaltyExcessCharacter: 1000000
 PenaltyReturnTypeOnItsOwnLine: 200
 PointerAlignment: Left
-ReflowComments:  true
-SortIncludes:    true
+ReflowComments: true
+SortIncludes: true
 SpaceAfterCStyleCast: false
 SpaceAfterTemplateKeyword: true
 SpaceBeforeAssignmentOperators: true
 SpaceBeforeParens: ControlStatements
 SpaceInEmptyParentheses: false
 SpacesBeforeTrailingComments: 2
-SpacesInAngles:  false
+SpacesInAngles: false
 SpacesInContainerLiterals: true
 SpacesInCStyleCastParentheses: false
 SpacesInParentheses: false
 SpacesInSquareBrackets: false
-Standard:        Auto
-TabWidth:        8
-UseTab:          Never
-...
+Standard: Auto
+TabWidth: 8
+UseTab: Never
 ---
 Language: JavaScript
 SpacesInContainerLiterals: false

.github/labeler.yml

@@ -1,28 +1,29 @@
 change:
-  - head-branch: ['^change/']
+  - head-branch: ["^change/"]
 
 enhancement:
-  - head-branch: ['^feature/', '^feat/', '^enhancement/', '^enh/']
+  - head-branch: ["^feature/", "^feat/", "^enhancement/", "^enh/"]
 
 bug:
-  - head-branch: ['^fix/', '^bug/']
+  - head-branch: ["^fix/", "^bug/"]
 
 chore:
-  - head-branch: ['^chore/']
+  - head-branch: ["^chore/"]
 
 documentation:
-  - head-branch: ['^docs/', '^doc/']
+  - head-branch: ["^docs/", "^doc/"]
   - changed-files:
-    - any-glob-to-any-file: '**/*.md'
+      - any-glob-to-any-file: "**/*.md"
 
 dependencies:
-  - head-branch: ['^deps/', '^dep/', '^dependabot/', 'pre-commit-ci-update-config']
+  - head-branch:
+      ["^deps/", "^dep/", "^dependabot/", "pre-commit-ci-update-config"]
 
 tests:
   - any:
-      - head-branch: ['^tests/', '^test/']
+      - head-branch: ["^tests/", "^test/"]
       - changed-files:
-        - any-glob-to-any-file: 'test/**/*'
+          - any-glob-to-any-file: "test/**/*"
   - all:
       - changed-files:
-        - all-globs-to-all-files: '!test/requirements.txt'
+          - all-globs-to-all-files: "!test/requirements.txt"

.markdownlint-cli2.yaml

@@ -0,0 +1,18 @@
+# Rule configuration.
+# For rule descriptions and how to fix: https://github.com/DavidAnson/markdownlint/tree/main#rules--aliases
+config:
+  ul-style:
+    style: dash
+  no-duplicate-heading:
+    siblings_only: true
+  line-length:
+    line_length: 120
+    code_blocks: false
+    tables: false
+
+# Define glob expressions to ignore
+ignores:
+  - ".github/"
+
+# Fix any fixable errors
+fix: true

.pre-commit-config.yaml

@@ -27,15 +27,34 @@ repos:
       - id: no-commit-to-branch
       - id: requirements-txt-fixer
       - id: fix-byte-order-marker
+      - id: detect-private-key
+
   - repo: https://github.com/asottile/pyupgrade
     rev: v3.18.0
     hooks:
       - id: pyupgrade
+
   - repo: https://github.com/PyCQA/isort
     rev: 5.13.2
     hooks:
       - id: isort
+
   - repo: https://github.com/psf/black
     rev: 24.10.0
     hooks:
       - id: black
+
+  - repo: https://github.com/gitleaks/gitleaks
+    rev: v8.21.0
+    hooks:
+      - id: gitleaks
+
+  - repo: https://github.com/DavidAnson/markdownlint-cli2
+    rev: v0.14.0
+    hooks:
+      - id: markdownlint-cli2
+
+  - repo: https://github.com/adrienverge/yamllint.git
+    rev: v1.35.1
+    hooks:
+      - id: yamllint

.yamllint.yaml

@@ -0,0 +1,16 @@
+---
+ignore-from-file: .gitignore
+
+extends: default
+
+rules:
+  comments:
+    min-spaces-from-content: 1
+  comments-indentation: enable
+  document-start: disable
+  line-length:
+    max: 120
+    ignore: |
+      .github/
+  truthy:
+    check-keys: false

README.md

@@ -1,34 +1,40 @@
-nginx-opentracing
------------------
+# NGINX plugin for OpenTracing
+
+[![Docker](https://github.com/opentracing-contrib/nginx-opentracing/actions/workflows/docker.yml/badge.svg)](https://github.com/opentracing-contrib/nginx-opentracing/actions/workflows/docker.yml)
+[![GitHub release (laßtest SemVer)](https://img.shields.io/github/v/release/opentracing-contrib/nginx-opentracing?logo=github&sort=semver)](https://github.com/opentracing-contrib/nginx-opentracing/releases/latest)
+![GitHub all releases](https://img.shields.io/github/downloads/opentracing-contrib/nginx-opentracing/total?logo=github)
+![GitHub release (latest by SemVer)](https://img.shields.io/github/downloads/opentracing-contrib/nginx-opentracing/latest/total?sort=semver&logo=github)
+[![Docker Pulls](https://img.shields.io/docker/pulls/opentracing/nginx-opentracing.svg)](https://hub.docker.com/r/opentracing/nginx-opentracing/)
 
 Enable requests served by nginx for distributed tracing via [The OpenTracing Project](http://opentracing.io).
 
-Dependencies
-------------
+## Dependencies
+
 - The [C++ OpenTracing Library](https://github.com/opentracing/opentracing-cpp)
 - A C++ OpenTracing Tracer. It currently works with
-[Jaeger](https://github.com/jaegertracing/cpp-client),
-[Zipkin](https://github.com/rnburn/zipkin-cpp-opentracing),
-[LightStep](https://github.com/lightstep/lightstep-tracer-cpp), or
-[Datadog](https://github.com/DataDog/dd-opentracing-cpp/).
+  [Jaeger](https://github.com/jaegertracing/cpp-client),
+  [Zipkin](https://github.com/rnburn/zipkin-cpp-opentracing),
+  [LightStep](https://github.com/lightstep/lightstep-tracer-cpp), or
+  [Datadog](https://github.com/DataDog/dd-opentracing-cpp/).
 - Source for [Nginx 1.9.13 or later](http://nginx.org/).
 
-Installation
-------------
+## Installation
+
 For `linux-x86_64`, pre-compiled binaries are provided for the supported versions of NGINX.
 These can be dropped into existing NGINX installations provided that NGINX was compiled with
-the `--with-compat` option. See [example/trivial/ubuntu-x86_64](example/trivial/ubuntu-x86_64) for an
-example of how to set it up.
+the `--with-compat` option.
+See [example/trivial/ubuntu-x86_64](example/trivial/ubuntu-x86_64) for an example of how to set it up.
+
+Otherwise, nginx-opentracing can be used from the [Docker image](https://github.com/opentracing-contrib/nginx-opentracing#docker)
+or [built from source](https://github.com/opentracing-contrib/nginx-opentracing#building-from-source).
 
-Otherwise, nginx-opentracing can be used from the [Docker image](https://github.com/opentracing-contrib/nginx-opentracing#docker) or
-[built from source](https://github.com/opentracing-contrib/nginx-opentracing#building-from-source).
+## Getting Started
 
-Getting Started
----------------
 First, write a configuration for the tracer used. Below's an example of what
 a Jaeger configuration might look like:
 
 /etc/jaeger-nginx-config.json
+
 ```json
 {
   "service_name": "nginx",
@@ -55,7 +61,8 @@ See the vendor documentation for details on what options are available.
 
 You can then set up NGINX for distributed tracing by adding the following to
 nginx.conf:
-```
+
+```nginx
 # Load the OpenTracing dynamic module.
 load_module modules/ngx_http_opentracing_module.so;
 
@@ -99,8 +106,8 @@ See [Tutorial](doc/Tutorial.md) for a more complete example,
 [Reference](doc/Reference.md) for a list of available OpenTracing-related
 directives.
 
-Docker
-------
+## Docker
+
 A docker image `opentracing/nginx-opentracing` is provided to support using nginx with OpenTracing
 in a manner analogous to the [nginx Docker image](https://hub.docker.com/_/nginx/).
 See [here](example/) for examples of how to use it.
@@ -124,18 +131,17 @@ docker build \
 
 Other build arguments
 
-* `OPENTRACING_CPP_VERSION`
-* `JAEGER_CPP_VERSION`
-* `GRPC_VERSION`
+- `OPENTRACING_CPP_VERSION`
+- `JAEGER_CPP_VERSION`
+- `GRPC_VERSION`
 
-Building From Source
---------------------
+## Building From Source
 
-```
-$ tar zxvf nginx-1.9.x.tar.gz
-$ cd nginx-1.9.x
-$ ./configure --add-dynamic-module=/absolute/path/to/nginx-opentracing/opentracing
-$ make && sudo make install
+```bash
+tar zxvf nginx-1.9.x.tar.gz
+cd nginx-1.9.x
+./configure --add-dynamic-module=/absolute/path/to/nginx-opentracing/opentracing
+make && sudo make install
 ```
 
 You will also need to install a C++ tracer for either
@@ -145,7 +151,7 @@ You will also need to install a C++ tracer for either
 or [Zipkin](https://github.com/rnburn/zipkin-cpp-opentracing).
 For linux x86-64, portable binary plugins are available:
 
-```
+```bash
 # Jaeger
 wget https://github.com/jaegertracing/jaeger-client-cpp/releases/download/v0.4.2/libjaegertracing_plugin.linux_amd64.so -O /usr/local/lib/libjaegertracing_plugin.so
 
@@ -162,11 +168,10 @@ wget -O - https://github.com/DataDog/dd-opentracing-cpp/releases/download/v0.3.0
 Make sure the nginx module for opentracing and a tracer plugin were built against the same version of [C++ OpenTracing Library](https://github.com/opentracing/opentracing-cpp).
 By default [Opentracing v1.6.0](https://github.com/opentracing/opentracing-cpp/releases/tag/v1.6.0) is used.
 
-Testing
---------
+## Testing
 
 Run tests on local machine requires `pyenv` and tested against version 3.8.5.
 
-```shell
-$ make test
+```bash
+make test
 ```

doc/Reference.md

@@ -1,5 +1,6 @@
-Directives
-----------
+# Reference
+
+## Directives
 
 ### `opentracing`
 
@@ -75,7 +76,8 @@ of the span for an NGINX location block.
 - **default**: `on`
 - **context**: `http`, `server`, `location`
 
-Enables or disables using OpenTracing spans from incoming requests as parent for created ones. Might be disabled for security reasons.
+Enables or disables using OpenTracing spans from incoming requests as parent for created ones.
+Might be disabled for security reasons.
 
 ### `opentracing_tag`
 
@@ -85,10 +87,9 @@ Enables or disables using OpenTracing spans from incoming requests as parent for
 Sets a [tag](https://github.com/opentracing/specification/blob/master/specification.md#set-a-span-tag)
 with the given `key` and `value` for an NGINX span.
 
-Variables
----------
+## Variables
 
-### `opentracing_context_`*name*
+### `opentracing_context_`_name_
 
 Expands to the a value of the active span context; the last part of the variable
 name is the span context's header converted to lower case with dashes replaced by