GitHub - yemo-memeda/rk-gin: Start gin microservice from YAML, plugin of rk-boot

rk-gin

Inject middlewares & server configuration of gin-gonic/gin from YAML file.

This belongs to rk-boot family. We suggest use this lib with rk-boot.

Architecture

Quick Start

In the bellow example, we will start microservice with bellow functionality and middlewares enabled via YAML.

gin-gonic/gin server
Swagger UI
Docs
CommonService
Prometheus Metrics (middleware)
Logging (middleware)
Meta (middleware)

Please refer example at example/boot/simple.

Installation

go get github.com/rookie-ninja/rk-gin/v2

1.Create boot.yaml

boot.yaml

show

---
gin:
  - name: greeter                     # Required
    port: 8080                        # Required
    enabled: true                     # Required
    commonService:                    # Optional
      enabled: true                   # Optional, default: false
    sw:                               # Optional
      enabled: true                   # Optional, default: false
    docs:                             # Optional
      enabled: true                   # Optional, default: false
    prom:
      enabled: true                   # Optional, default: false
    middleware:
      logging:
        enabled: true
      prom:
        enabled: true
      meta:
        enabled: true

2.Create main.go

main.go

show

// Copyright (c) 2021 rookie-ninja
//
// Use of this source code is governed by an Apache-style
// license that can be found in the LICENSE file.
package main

import (
	"context"
	"embed"
	_ "embed"
	"fmt"
	"github.com/gin-gonic/gin"
	"github.com/rookie-ninja/rk-entry/v2/entry"
	"github.com/rookie-ninja/rk-gin/v2/boot"
	"net/http"
)

// How to use embed.FS for:
//
// - boot.yaml
// - rkentry.DocsEntryType
// - rkentry.SWEntryType
// - rkentry.StaticFileHandlerEntryType
// - rkentry.CertEntry
//
// If we use embed.FS, then we only need one single binary file while packing.
// We suggest use embed.FS to pack swagger local file since rk-entry would use os.Getwd() to look for files
// if relative path was provided.
//
//go:embed docs
var docsFS embed.FS

func init() {
	rkentry.GlobalAppCtx.AddEmbedFS(rkentry.SWEntryType, "greeter", &docsFS)
}

//go:embed boot.yaml
var boot []byte

// @title RK Swagger for Gin
// @version 1.0
// @description This is a greeter service with rk-boot.
func main() {
	// Bootstrap preload entries
	rkentry.BootstrapPreloadEntryYAML(boot)

	// Bootstrap gin entry from boot config
	res := rkgin.RegisterGinEntryYAML(boot)

	// Get GinEntry
	ginEntry := res["greeter"].(*rkgin.GinEntry)
	ginEntry.Router.GET("/v1/greeter", Greeter)

	// Bootstrap gin entry
	ginEntry.Bootstrap(context.Background())

	// Wait for shutdown signal
	rkentry.GlobalAppCtx.WaitForShutdownSig()

	// Interrupt gin entry
	ginEntry.Interrupt(context.Background())
}

// Greeter handler
// @Summary Greeter service
// @Id 1
// @version 1.0
// @produce application/json
// @Param name query string true "Input name"
// @Success 200 {object} GreeterResponse
// @Router /v1/greeter [get]
func Greeter(ctx *gin.Context) {
	ctx.JSON(http.StatusOK, &GreeterResponse{
		Message: fmt.Sprintf("Hello %s!", ctx.Query("name")),
	})
}

type GreeterResponse struct {
	Message string
}

3.Start server

$ go run main.go

4.Validation

show

4.1 Gin server

Try to test Gin Service with curl

# Curl to common service
$ curl localhost:8080/rk/v1/ready
{
  "ready": true
}

$ curl localhost:8080/rk/v1/alive
{
  "alive": true
}

4.2 Swagger UI

Please refer sw section at Full YAML.

By default, we could access swagger UI at http://localhost:8080/sw

4.3 Docs UI

Please refer docs section at Full YAML.

By default, we could access docs UI at http://localhost:8080/docs

4.4 Prometheus Metrics

Please refer middleware.prom section at Full YAML.

By default, we could access prometheus client at http://localhost:8080/metrics

http://localhost:8080/metrics

4.5 Logging

Please refer middleware.logging section at Full YAML.

By default, we enable zap logger and event logger with encoding type of [console]. Encoding type of [json] and [flatten] is also supported.

2021-12-28T02:14:48.303+0800    INFO    boot/gin_entry.go:920   Bootstrap ginEntry      {"eventId": "65b03dbc-c10e-4998-8d49-26775dafc78b", "entryName": "greeter"}
------------------------------------------------------------------------
endTime=2021-12-28T02:14:48.305036+08:00
startTime=2021-12-28T02:14:48.30306+08:00
elapsedNano=1977443
timezone=CST
ids={"eventId":"65b03dbc-c10e-4998-8d49-26775dafc78b"}
app={"appName":"rk","appVersion":"","entryName":"greeter","entryType":"GinEntry"}
env={"arch":"amd64","az":"*","domain":"*","hostname":"lark.local","localIP":"10.8.0.2","os":"darwin","realm":"*","region":"*"}
payloads={"commonServiceEnabled":true,"commonServicePathPrefix":"/rk/v1/","entryName":"greeter","entryPort":8080,"entryType":"GinEntry","promEnabled":true,"promPath":"/metrics","promPort":8080,"swEnabled":true,"swPath":"/sw/","tvEnabled":true,"tvPath":"/rk/v1/tv/"}
error={}
counters={}
pairs={}
timing={}
remoteAddr=localhost
operation=Bootstrap
resCode=OK
eventStatus=Ended
EOE

4.6 Meta

Please refer meta section at Full YAML.

By default, we will send back some metadata to client including gateway with headers.

$ curl -vs localhost:8080/rk/v1/ready
*   Trying ::1...
* TCP_NODELAY set
* Connected to localhost (::1) port 8080 (#0)
> GET /rk/v1/healthy HTTP/1.1
> Host: localhost:8080
> User-Agent: curl/7.64.1
> Accept: */*
> 
< HTTP/1.1 200 OK
< Content-Type: application/json; charset=utf-8
< X-Request-Id: f3f0212e-5d99-4851-ae79-ea88818f0ed6
< X-Rk-App-Name: rk
< X-Rk-App-Unix-Time: 2021-12-28T02:20:48.207716+08:00
< X-Rk-Received-Time: 2021-12-28T02:20:48.207716+08:00
< Date: Mon, 27 Dec 2021 18:20:48 GMT
< Content-Length: 16
< 
* Connection #0 to host localhost left intact
{"ready":true}

4.7 Send request

We registered /v1/greeter API in gin-gonic/gin server and let's validate it!

$ curl -vs "localhost:8080/v1/greeter?name=rk-dev"
*   Trying ::1...
* TCP_NODELAY set
* Connected to localhost (::1) port 8080 (#0)
> GET /v1/greeter?name=rk-dev HTTP/1.1
> Host: localhost:8080
> User-Agent: curl/7.64.1
> Accept: */*
> 
< HTTP/1.1 200 OK
< Content-Type: application/json; charset=utf-8
< X-Request-Id: a96ab531-e28f-47ca-a082-fc3f8ef14187
< X-Rk-App-Name: rk
< X-Rk-App-Unix-Time: 2021-12-28T02:22:03.289469+08:00
< X-Rk-Received-Time: 2021-12-28T02:22:03.289469+08:00
< Date: Mon, 27 Dec 2021 18:22:03 GMT
< Content-Length: 27
< 
* Connection #0 to host localhost left intact
{"Message":"Hello rk-dev!"}

4.8 RPC logs

Bellow logs would be printed in stdout.

------------------------------------------------------------------------
endTime=2021-12-28T02:22:03.289585+08:00
startTime=2021-12-28T02:22:03.289457+08:00
elapsedNano=128210
timezone=CST
ids={"eventId":"a96ab531-e28f-47ca-a082-fc3f8ef14187","requestId":"a96ab531-e28f-47ca-a082-fc3f8ef14187"}
app={"appName":"rk","appVersion":"","entryName":"greeter","entryType":"GinEntry"}
env={"arch":"amd64","az":"*","domain":"*","hostname":"lark.local","localIP":"10.8.0.2","os":"darwin","realm":"*","region":"*"}
payloads={"apiMethod":"GET","apiPath":"/v1/greeter","apiProtocol":"HTTP/1.1","apiQuery":"name=rk-dev","userAgent":"curl/7.64.1"}
error={}
counters={}
pairs={}
timing={}
remoteAddr=localhost:54028
operation=/v1/greeter
resCode=200
eventStatus=Ended
EOE

4.9 RPC prometheus metrics

Prometheus client will automatically register into gin-gonic/gin instance at /metrics.

Access http://localhost:8080/metrics

Supported features

User can enable anyone of those as needed! No mandatory binding!

Instance	Description
gin.Router	Compatible with original gin-gonic/gin service functionalities
Config	Configure spf13/viper as config instance and reference it from YAML
Logger	Configure uber-go/zap logger configuration and reference it from YAML
Event	Configure logging of RPC with rk-query and reference it from YAML
Cert	Fetch TLS/SSL certificates start microservice.
Prometheus	Start prometheus client at client side and push metrics to pushgateway as needed.
Swagger	Builtin swagger UI handler.
Docs	Builtin RapiDoc instance which can be used to replace swagger and RK TV.
CommonService	List of common APIs.
StaticFileHandler	A Web UI shows files could be downloaded from server, currently support source of local and embed.FS.
PProf	PProf web UI.

Supported middlewares

All middlewares could be configured via YAML or Code.

User can enable anyone of those as needed! No mandatory binding!

Middleware	Description
Prom	Collect RPC metrics and export to prometheus client.
Logging	Log every RPC requests as event with rk-query.
Trace	Collect RPC trace and export it to stdout, file or jaeger with open-telemetry/opentelemetry-go.
Panic	Recover from panic for RPC requests and log it.
Meta	Send micsro service metadata as header to client.
Auth	Support [Basic Auth] and [API Key] authorization types.
RateLimit	Limiting RPC rate globally or per path.
Timeout	Timing out request by configuration.
Gzip	Compress and Decompress message body based on request header with gzip format .
CORS	Server side CORS validation.
JWT	Server side JWT validation.
Secure	Server side secure validation.
CSRF	Server side csrf validation.

YAML Options

User can start multiple gin-gonic/gin instances at the same time. Please make sure use different port and name.

show

---
#app:
#  name: my-app                                            # Optional, default: "rk-app"
#  version: "v1.0.0"                                       # Optional, default: "v0.0.0"
#  description: "this is description"                      # Optional, default: ""
#  keywords: ["rk", "golang"]                              # Optional, default: []
#  homeUrl: "http://example.com"                           # Optional, default: ""
#  docsUrl: ["http://example.com"]                         # Optional, default: []
#  maintainers: ["rk-dev"]                                 # Optional, default: []
#logger:
#  - name: my-logger                                       # Required
#    description: "Description of entry"                   # Optional
#    domain: "*"                                           # Optional, default: "*"
#    default: false                                        # Optional, default: false, use as default logger entry
#    zap:                                                  # Optional
#      level: info                                         # Optional, default: info
#      development: true                                   # Optional, default: true
#      disableCaller: false                                # Optional, default: false
#      disableStacktrace: true                             # Optional, default: true
#      encoding: console                                   # Optional, default: console
#      outputPaths: ["stdout"]                             # Optional, default: [stdout]
#      errorOutputPaths: ["stderr"]                        # Optional, default: [stderr]
#      encoderConfig:                                      # Optional
#        timeKey: "ts"                                     # Optional, default: ts
#        levelKey: "level"                                 # Optional, default: level
#        nameKey: "logger"                                 # Optional, default: logger
#        callerKey: "caller"                               # Optional, default: caller
#        messageKey: "msg"                                 # Optional, default: msg
#        stacktraceKey: "stacktrace"                       # Optional, default: stacktrace
#        skipLineEnding: false                             # Optional, default: false
#        lineEnding: "\n"                                  # Optional, default: \n
#        consoleSeparator: "\t"                            # Optional, default: \t
#      sampling:                                           # Optional, default: nil
#        initial: 0                                        # Optional, default: 0
#        thereafter: 0                                     # Optional, default: 0
#      initialFields:                                      # Optional, default: empty map
#        key: value
#    lumberjack:                                           # Optional, default: nil
#      filename:
#      maxsize: 1024                                       # Optional, suggested: 1024 (MB)
#      maxage: 7                                           # Optional, suggested: 7 (day)
#      maxbackups: 3                                       # Optional, suggested: 3 (day)
#      localtime: true                                     # Optional, suggested: true
#      compress: true                                      # Optional, suggested: true
#    loki:
#      enabled: true                                       # Optional, default: false
#      addr: localhost:3100                                # Optional, default: localhost:3100
#      path: /loki/api/v1/push                             # Optional, default: /loki/api/v1/push
#      username: ""                                        # Optional, default: ""
#      password: ""                                        # Optional, default: ""
#      maxBatchWaitMs: 3000                                # Optional, default: 3000
#      maxBatchSize: 1000                                  # Optional, default: 1000
#      insecureSkipVerify: false                           # Optional, default: false
#      labels:                                             # Optional, default: empty map
#        my_label_key: my_label_value
#event:
#  - name: my-event                                        # Required
#    description: "Description of entry"                   # Optional
#    domain: "*"                                           # Optional, default: "*"
#    default: false                                        # Optional, default: false, use as default event entry
#    encoding: console                                     # Optional, default: console
#    outputPaths: ["stdout"]                               # Optional, default: [stdout]
#    lumberjack:                                           # Optional, default: nil
#      filename:
#      maxsize: 1024                                       # Optional, suggested: 1024 (MB)
#      maxage: 7                                           # Optional, suggested: 7 (day)
#      maxbackups: 3                                       # Optional, suggested: 3 (day)
#      localtime: true                                     # Optional, suggested: true
#      compress: true                                      # Optional, suggested: true
#    loki:
#      enabled: true                                       # Optional, default: false
#      addr: localhost:3100                                # Optional, default: localhost:3100
#      path: /loki/api/v1/push                             # Optional, default: /loki/api/v1/push
#      username: ""                                        # Optional, default: ""
#      password: ""                                        # Optional, default: ""
#      maxBatchWaitMs: 3000                                # Optional, default: 3000
#      maxBatchSize: 1000                                  # Optional, default: 1000
#      insecureSkipVerify: false                           # Optional, default: false
#      labels:                                             # Optional, default: empty map
#        my_label_key: my_label_value
#cert:
#  - name: my-cert                                         # Required
#    description: "Description of entry"                   # Optional, default: ""
#    domain: "*"                                           # Optional, default: "*"
#    caPath: "certs/ca.pem"                                # Optional, default: ""
#    certPemPath: "certs/server-cert.pem"                  # Optional, default: ""
#    keyPemPath: "certs/server-key.pem"                    # Optional, default: ""
#config:
#  - name: my-config                                       # Required
#    description: "Description of entry"                   # Optional, default: ""
#    domain: "*"                                           # Optional, default: "*"
#    path: "config/config.yaml"                            # Optional
#    envPrefix: ""                                         # Optional, default: ""
#    content:                                              # Optional, defualt: empty map
#      key: value
gin:
  - name: greeter                                          # Required
    port: 8080                                             # Required
    enabled: true                                          # Required
#    description: "greeter server"                         # Optional, default: ""
#    certEntry: my-cert                                    # Optional, default: "", reference of cert entry declared above
#    loggerEntry: my-logger                                # Optional, default: "", reference of cert entry declared above, STDOUT will be used if missing
#    eventEntry: my-event                                  # Optional, default: "", reference of cert entry declared above, STDOUT will be used if missing
#    sw:
#      enabled: true                                       # Optional, default: false
#      path: "sw"                                          # Optional, default: "sw"
#      jsonPath: ""                                        # Optional
#      headers: ["sw:rk"]                                  # Optional, default: []
#    docs:
#      enabled: true                                       # Optional, default: false
#      path: "docs"                                        # Optional, default: "docs"
#      specPath: ""                                        # Optional
#      headers: ["sw:rk"]                                  # Optional, default: []
#      style:                                              # Optional
#        theme: "light"                                    # Optional, default: "light"
#      debug: false                                        # Optional, default: false
#    commonService:
#      enabled: true                                       # Optional, default: false
#      pathPrefix: ""                                      # Optional, default: "/rk/v1/"
#    static:
#      enabled: true                                       # Optional, default: false
#      path: "/static"                                     # Optional, default: /static
#      sourceType: local                                   # Optional, options: local, embed.FS can be used either, need to specify in code
#      sourcePath: "."                                     # Optional, full path of source directory
#    pprof:
#      enabled: true                                       # Optional, default: false
#      path: "/pprof"                                      # Optional, default: /pprof
#    prom:
#      enabled: true                                       # Optional, default: false
#      path: ""                                            # Optional, default: "/metrics"
#      pusher:
#        enabled: false                                    # Optional, default: false
#        jobName: "greeter-pusher"                         # Required
#        remoteAddress: "localhost:9091"                   # Required
#        basicAuth: "user:pass"                            # Optional, default: ""
#        intervalMs: 10000                                 # Optional, default: 1000
#        certEntry: my-cert                                # Optional, default: "", reference of cert entry declared above
#    middleware:
#      ignore: [""]                                        # Optional, default: []
#      errorModel: google                                  # Optional, default: google, [amazon, google] are supported options
#      logging:
#        enabled: true                                     # Optional, default: false
#        ignore: [""]                                      # Optional, default: []
#        loggerEncoding: "console"                         # Optional, default: "console"
#        loggerOutputPaths: ["logs/app.log"]               # Optional, default: ["stdout"]
#        eventEncoding: "console"                          # Optional, default: "console"
#        eventOutputPaths: ["logs/event.log"]              # Optional, default: ["stdout"]
#      prom:
#        enabled: true                                     # Optional, default: false
#        ignore: [""]                                      # Optional, default: []
#      auth:
#        enabled: true                                     # Optional, default: false
#        ignore: [""]                                      # Optional, default: []
#        basic:
#          - "user:pass"                                   # Optional, default: []
#        apiKey:
#          - "keys"                                        # Optional, default: []
#      meta:
#        enabled: true                                     # Optional, default: false
#        ignore: [""]                                      # Optional, default: []
#        prefix: "rk"                                      # Optional, default: "rk"
#      trace:
#        enabled: true                                     # Optional, default: false
#        ignore: [""]                                      # Optional, default: []
#        exporter:                                         # Optional, default will create a stdout exporter
#          file:
#            enabled: true                                 # Optional, default: false
#            outputPath: "logs/trace.log"                  # Optional, default: stdout
#          jaeger:
#            agent:
#              enabled: false                              # Optional, default: false
#              host: ""                                    # Optional, default: localhost
#              port: 0                                     # Optional, default: 6831
#            collector:
#              enabled: true                               # Optional, default: false
#              endpoint: ""                                # Optional, default: http://localhost:14268/api/traces
#              username: ""                                # Optional, default: ""
#              password: ""                                # Optional, default: ""
#      rateLimit:
#        enabled: false                                    # Optional, default: false
#        ignore: [""]                                      # Optional, default: []
#        algorithm: "leakyBucket"                          # Optional, default: "tokenBucket"
#        reqPerSec: 100                                    # Optional, default: 1000000
#        paths:
#          - path: "/rk/v1/healthy"                        # Optional, default: ""
#            reqPerSec: 0                                  # Optional, default: 1000000
#      timeout:
#        enabled: false                                    # Optional, default: false
#        ignore: [""]                                      # Optional, default: []
#        timeoutMs: 5000                                   # Optional, default: 5000
#        paths:
#          - path: "/rk/v1/healthy"                        # Optional, default: ""
#            timeoutMs: 1000                               # Optional, default: 5000
#      jwt:
#        enabled: true                                     # Optional, default: false
#        ignore: [ "" ]                                    # Optional, default: []
#        signerEntry: ""                                   # Optional, default: ""
#        skipVerify: false                                 # Optional, default: false
#        symmetric:                                        # Optional
#          algorithm: ""                                   # Required, default: ""
#          token: ""                                       # Optional, default: ""
#          tokenPath: ""                                   # Optional, default: ""
#        asymmetric:                                       # Optional
#          algorithm: ""                                   # Required, default: ""
#          privateKey: ""                                  # Optional, default: ""
#          privateKeyPath: ""                              # Optional, default: ""
#          publicKey: ""                                   # Optional, default: ""
#          publicKeyPath: ""                               # Optional, default: ""
#        tokenLookup: "header:<name>"                      # Optional, default: "header:Authorization"
#        authScheme: "Bearer"                              # Optional, default: "Bearer"
#      secure:
#        enabled: true                                     # Optional, default: false
#        ignore: [""]                                      # Optional, default: []
#        xssProtection: ""                                 # Optional, default: "1; mode=block"
#        contentTypeNosniff: ""                            # Optional, default: nosniff
#        xFrameOptions: ""                                 # Optional, default: SAMEORIGIN
#        hstsMaxAge: 0                                     # Optional, default: 0
#        hstsExcludeSubdomains: false                      # Optional, default: false
#        hstsPreloadEnabled: false                         # Optional, default: false
#        contentSecurityPolicy: ""                         # Optional, default: ""
#        cspReportOnly: false                              # Optional, default: false
#        referrerPolicy: ""                                # Optional, default: ""
#      csrf:
#        enabled: true                                     # Optional, default: false
#        ignore: [""]                                      # Optional, default: []
#        tokenLength: 32                                   # Optional, default: 32
#        tokenLookup: "header:X-CSRF-Token"                # Optional, default: "header:X-CSRF-Token"
#        cookieName: "_csrf"                               # Optional, default: _csrf
#        cookieDomain: ""                                  # Optional, default: ""
#        cookiePath: ""                                    # Optional, default: ""
#        cookieMaxAge: 86400                               # Optional, default: 86400
#        cookieHttpOnly: false                             # Optional, default: false
#        cookieSameSite: "default"                         # Optional, default: "default", options: lax, strict, none, default
#      gzip:
#        enabled: true                                     # Optional, default: false
#        ignore: [""]                                      # Optional, default: []
#        level: bestSpeed                                  # Optional, options: [noCompression, bestSpeed， bestCompression, defaultCompression, huffmanOnly]
#      cors:
#        enabled: true                                     # Optional, default: false
#        ignore: [""]                                      # Optional, default: []
#        allowOrigins:                                     # Optional, default: []
#          - "http://localhost:*"                          # Optional, default: *
#        allowCredentials: false                           # Optional, default: false
#        allowHeaders: []                                  # Optional, default: []
#        allowMethods: []                                  # Optional, default: []
#        exposeHeaders: []                                 # Optional, default: []
#        maxAge: 0                                         # Optional, default: 0

Development Status: Stable

Build instruction

Simply run make all to validate your changes. Or run codes in example/ folder.

make all

If files in boot/assets have been modified, then we need to run it.

Test instruction

Run unit test with make test command.

github workflow will automatically run unit test and golangci-lint for testing and lint validation.

Contributing

We encourage and support an active, healthy community of contributors — including you! Details are in the contribution guide and the code of conduct. The rk maintainers keep an eye on issues and pull requests, but you can also report any negative conduct to lark@rkdev.info.

Released under the Apache 2.0 License.

Name		Name	Last commit message	Last commit date
Latest commit History 259 Commits
.github		.github
boot		boot
docs/img		docs/img
example/boot		example/boot
middleware		middleware
.gitignore		.gitignore
.golangci.yml		.golangci.yml
CODE_OF_CONDUCT.md		CODE_OF_CONDUCT.md
CONTRIBUTING.md		CONTRIBUTING.md
LICENSE		LICENSE
Makefile		Makefile
README.md		README.md
go.mod		go.mod
go.sum		go.sum

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rk-gin

Architecture

Quick Start

Installation

1.Create boot.yaml

2.Create main.go

3.Start server

4.Validation

4.1 Gin server

4.2 Swagger UI

4.3 Docs UI

4.4 Prometheus Metrics

4.5 Logging

4.6 Meta

4.7 Send request

4.8 RPC logs

4.9 RPC prometheus metrics

Supported features

Supported middlewares

YAML Options

Development Status: Stable

Build instruction

Test instruction

Contributing

About

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yemo-memeda/rk-gin

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rk-gin

Architecture

Quick Start

Installation

1.Create boot.yaml

2.Create main.go

3.Start server

4.Validation

4.1 Gin server

4.2 Swagger UI

4.3 Docs UI

4.4 Prometheus Metrics

4.5 Logging

4.6 Meta

4.7 Send request

4.8 RPC logs

4.9 RPC prometheus metrics

Supported features

Supported middlewares

YAML Options

Development Status: Stable

Build instruction

Test instruction

Contributing

About

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License

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