[Style][Go] standardize the format of mustache (tiny change) (#17363)

* fix: change indent style to tab in the mustache to generate Go code

* docs: standardize the language names for code blocks

* docs: change indent style to tab in the code blocks

* update: regenerate samples

* `./bin/generate-samples.sh ./bin/configs/*.yaml`

modules/openapi-generator/src/main/resources/go-echo-server/api.mustache

@@ -1,18 +1,18 @@
 package handlers
 {{#operations}}
 import (
-    "{{{gitHost}}}/{{{gitUserId}}}/{{{gitRepoId}}}/models"
-    "github.com/labstack/echo/v4"
-    "net/http"
+	"{{{gitHost}}}/{{{gitUserId}}}/{{{gitRepoId}}}/models"
+	"github.com/labstack/echo/v4"
+	"net/http"
 ){{#operation}}
 
 // {{nickname}} - {{{summary}}}
 {{#isDeprecated}}
 // Deprecated
 {{/isDeprecated}}
 func (c *Container) {{operationId}}(ctx echo.Context) error {
-    return ctx.JSON(http.StatusOK, models.HelloWorld {
-        Message: "Hello World",
-    })
+	return ctx.JSON(http.StatusOK, models.HelloWorld {
+		Message: "Hello World",
+	})
 }
-{{/operation}}{{/operations}}
+{{/operation}}{{/operations}}

modules/openapi-generator/src/main/resources/go-echo-server/handler-container.mustache

@@ -6,6 +6,6 @@ type Container struct {
 
 // NewContainer returns an empty or an initialized container for your handlers.
 func NewContainer() (Container, error) {
-    c := Container{}
-    return c, nil
-}
+	c := Container{}
+	return c, nil
+}

modules/openapi-generator/src/main/resources/go-echo-server/hello-world.mustache

@@ -2,5 +2,5 @@ package models
 
 // HelloWorld is a sample data structure to make sure each endpoint return something.
 type HelloWorld struct {
-    Message string `json:"message"`
-}
+	Message string `json:"message"`
+}

modules/openapi-generator/src/main/resources/go-echo-server/main.mustache

@@ -9,7 +9,7 @@ import (
 func main() {
 	e := echo.New()
 
-    //todo: handle the error!
+	//todo: handle the error!
 	c, _ := handlers.NewContainer()
 
 	// Middleware
@@ -23,4 +23,4 @@ func main() {
 
 	// Start server
 	e.Logger.Fatal(e.Start(":{{serverPort}}"))
-}
+}

modules/openapi-generator/src/main/resources/go/README.mustache

@@ -21,7 +21,7 @@ For more information, please visit [{{{infoUrl}}}]({{{infoUrl}}})
 
 Install the following dependencies:
 
-```shell
+```sh
 go get github.com/stretchr/testify/assert
 {{#hasOAuthMethods}}
 go get golang.org/x/oauth2
@@ -31,13 +31,13 @@ go get golang.org/x/net/context
 
 Put the package under your project folder and add the following in import:
 
-```golang
+```go
 import {{packageName}} "{{gitHost}}/{{gitUserId}}/{{gitRepoId}}{{#isGoSubmodule}}/{{packageName}}{{/isGoSubmodule}}"
 ```
 
 To use a proxy, set the environment variable `HTTP_PROXY`:
 
-```golang
+```go
 os.Setenv("HTTP_PROXY", "http://proxy_name:proxy_port")
 ```
 
@@ -49,15 +49,15 @@ Default configuration comes with `Servers` field that contains server objects as
 
 For using other server than the one defined on index 0 set context value `{{packageName}}.ContextServerIndex` of type `int`.
 
-```golang
+```go
 ctx := context.WithValue(context.Background(), {{packageName}}.ContextServerIndex, 1)
 ```
 
 ### Templated Server URL
 
 Templated server URL is formatted using default variables from configuration or from context value `{{packageName}}.ContextServerVariables` of type `map[string]string`.
 
-```golang
+```go
 ctx := context.WithValue(context.Background(), {{packageName}}.ContextServerVariables, map[string]string{
 	"basePath": "v2",
 })
@@ -71,7 +71,7 @@ Each operation can use different server URL defined using `OperationServers` map
 An operation is uniquely identified by `"{classname}Service.{nickname}"` string.
 Similar rules for overriding default operation server index and variables applies by using `{{packageName}}.ContextOperationServerIndices` and `{{packageName}}.ContextOperationServerVariables` context maps.
 
-```golang
+```go
 ctx := context.WithValue(context.Background(), {{packageName}}.ContextOperationServerIndices, map[string]int{
 	"{classname}Service.{nickname}": 2,
 })
@@ -112,7 +112,7 @@ Note, each API key must be added to a map of `map[string]APIKey` where the key i
 
 Example
 
-```golang
+```go
 auth := context.WithValue(
 		context.Background(),
 		{{packageName}}.ContextAPIKeys,
@@ -130,7 +130,7 @@ r, err := client.Service.Operation(auth, args)
 
 Example
 
-```golang
+```go
 auth := context.WithValue(context.Background(), {{packageName}}.ContextAccessToken, "BEARER_TOKEN_STRING")
 r, err := client.Service.Operation(auth, args)
 ```
@@ -141,10 +141,10 @@ r, err := client.Service.Operation(auth, args)
 
 Example
 
-```golang
+```go
 auth := context.WithValue(context.Background(), {{packageName}}.ContextBasicAuth, {{packageName}}.BasicAuth{
-    UserName: "username",
-    Password: "password",
+	UserName: "username",
+	Password: "password",
 })
 r, err := client.Service.Operation(auth, args)
 ```
@@ -155,7 +155,7 @@ r, err := client.Service.Operation(auth, args)
 
 Example
 
-```golang
+```go
 	authConfig := {{packageName}}.HttpSignatureAuth{
 		KeyId:                "my-key-id",
 		PrivateKeyPath:       "rsa.pem",
@@ -193,14 +193,14 @@ Example
 
 Example
 
-```golang
+```go
 auth := context.WithValue(context.Background(), {{packageName}}.ContextAccessToken, "ACCESSTOKENSTRING")
 r, err := client.Service.Operation(auth, args)
 ```
 
 Or via OAuth2 module to automatically refresh tokens and perform user authentication.
 
-```golang
+```go
 import "golang.org/x/oauth2"
 
 /* Perform OAuth2 round trip request and obtain a token */

modules/openapi-generator/src/main/resources/go/api_doc.mustache

@@ -26,31 +26,31 @@ Method | HTTP request | Description
 package main
 
 import (
-    "context"
-    "fmt"
-    "os"
+	"context"
+	"fmt"
+	"os"
 {{#vendorExtensions.x-go-import}}
 {{{vendorExtensions.x-go-import}}}
 {{/vendorExtensions.x-go-import}}
-    {{goImportAlias}} "{{gitHost}}/{{gitUserId}}/{{gitRepoId}}{{#isGoSubmodule}}/{{packageName}}{{/isGoSubmodule}}"
+	{{goImportAlias}} "{{gitHost}}/{{gitUserId}}/{{gitRepoId}}{{#isGoSubmodule}}/{{packageName}}{{/isGoSubmodule}}"
 )
 
 func main() {
-    {{#allParams}}
-    {{paramName}} := {{{vendorExtensions.x-go-example}}} // {{{dataType}}} | {{{description}}}{{^required}} (optional){{/required}}{{#defaultValue}} (default to {{{.}}}){{/defaultValue}}
-    {{/allParams}}
-
-    configuration := {{goImportAlias}}.NewConfiguration()
-    apiClient := {{goImportAlias}}.NewAPIClient(configuration)
-    {{#returnType}}resp, {{/returnType}}r, err := apiClient.{{classname}}.{{operationId}}(context.Background(){{#pathParams}}, {{paramName}}{{/pathParams}}){{#allParams}}{{^isPathParam}}.{{vendorExtensions.x-export-param-name}}({{paramName}}){{/isPathParam}}{{/allParams}}.Execute()
-    if err != nil {
-        fmt.Fprintf(os.Stderr, "Error when calling `{{classname}}.{{operationId}}``: %v\n", err)
-        fmt.Fprintf(os.Stderr, "Full HTTP response: %v\n", r)
-    }
-    {{#returnType}}
-    // response from `{{operationId}}`: {{{.}}}
-    fmt.Fprintf(os.Stdout, "Response from `{{classname}}.{{operationId}}`: %v\n", resp)
-    {{/returnType}}
+	{{#allParams}}
+	{{paramName}} := {{{vendorExtensions.x-go-example}}} // {{{dataType}}} | {{{description}}}{{^required}} (optional){{/required}}{{#defaultValue}} (default to {{{.}}}){{/defaultValue}}
+	{{/allParams}}
+
+	configuration := {{goImportAlias}}.NewConfiguration()
+	apiClient := {{goImportAlias}}.NewAPIClient(configuration)
+	{{#returnType}}resp, {{/returnType}}r, err := apiClient.{{classname}}.{{operationId}}(context.Background(){{#pathParams}}, {{paramName}}{{/pathParams}}){{#allParams}}{{^isPathParam}}.{{vendorExtensions.x-export-param-name}}({{paramName}}){{/isPathParam}}{{/allParams}}.Execute()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error when calling `{{classname}}.{{operationId}}``: %v\n", err)
+		fmt.Fprintf(os.Stderr, "Full HTTP response: %v\n", r)
+	}
+	{{#returnType}}
+	// response from `{{operationId}}`: {{{.}}}
+	fmt.Fprintf(os.Stdout, "Response from `{{classname}}.{{operationId}}`: %v\n", resp)
+	{{/returnType}}
 }
 ```
 

modules/openapi-generator/src/main/resources/go/model_simple.mustache

@@ -348,7 +348,7 @@ func (o *{{{classname}}}) UnmarshalJSON(bytes []byte) (err error) {
 {{/hasRequired}}
 {{/isAdditionalPropertiesTrue}}
 {{#hasRequired}}
-    // This validates that all required properties are included in the JSON object
+	// This validates that all required properties are included in the JSON object
 	// by unmarshalling the object into a generic map with string keys and checking
 	// that every required field exists as a key in the generic map.
 	requiredProperties := []string{

samples/client/echo_api/go/README.md

@@ -13,20 +13,20 @@ This API client was generated by the [OpenAPI Generator](https://openapi-generat
 
 Install the following dependencies:
 
-```shell
+```sh
 go get github.com/stretchr/testify/assert
 go get golang.org/x/net/context
 ```
 
 Put the package under your project folder and add the following in import:
 
-```golang
+```go
 import openapi "github.com/GIT_USER_ID/GIT_REPO_ID"
 ```
 
 To use a proxy, set the environment variable `HTTP_PROXY`:
 
-```golang
+```go
 os.Setenv("HTTP_PROXY", "http://proxy_name:proxy_port")
 ```
 
@@ -38,15 +38,15 @@ Default configuration comes with `Servers` field that contains server objects as
 
 For using other server than the one defined on index 0 set context value `openapi.ContextServerIndex` of type `int`.
 
-```golang
+```go
 ctx := context.WithValue(context.Background(), openapi.ContextServerIndex, 1)
 ```
 
 ### Templated Server URL
 
 Templated server URL is formatted using default variables from configuration or from context value `openapi.ContextServerVariables` of type `map[string]string`.
 
-```golang
+```go
 ctx := context.WithValue(context.Background(), openapi.ContextServerVariables, map[string]string{
 	"basePath": "v2",
 })
@@ -60,7 +60,7 @@ Each operation can use different server URL defined using `OperationServers` map
 An operation is uniquely identified by `"{classname}Service.{nickname}"` string.
 Similar rules for overriding default operation server index and variables applies by using `openapi.ContextOperationServerIndices` and `openapi.ContextOperationServerVariables` context maps.
 
-```golang
+```go
 ctx := context.WithValue(context.Background(), openapi.ContextOperationServerIndices, map[string]int{
 	"{classname}Service.{nickname}": 2,
 })
@@ -126,10 +126,10 @@ Authentication schemes defined for the API:
 
 Example
 
-```golang
+```go
 auth := context.WithValue(context.Background(), openapi.ContextBasicAuth, openapi.BasicAuth{
-    UserName: "username",
-    Password: "password",
+	UserName: "username",
+	Password: "password",
 })
 r, err := client.Service.Operation(auth, args)
 ```
@@ -140,7 +140,7 @@ r, err := client.Service.Operation(auth, args)
 
 Example
 
-```golang
+```go
 auth := context.WithValue(context.Background(), openapi.ContextAccessToken, "BEARER_TOKEN_STRING")
 r, err := client.Service.Operation(auth, args)
 ```

samples/client/echo_api/go/docs/AuthAPI.md

@@ -23,23 +23,23 @@ To test HTTP basic authentication
 package main
 
 import (
-    "context"
-    "fmt"
-    "os"
-    openapiclient "github.com/GIT_USER_ID/GIT_REPO_ID"
+	"context"
+	"fmt"
+	"os"
+	openapiclient "github.com/GIT_USER_ID/GIT_REPO_ID"
 )
 
 func main() {
 
-    configuration := openapiclient.NewConfiguration()
-    apiClient := openapiclient.NewAPIClient(configuration)
-    resp, r, err := apiClient.AuthAPI.TestAuthHttpBasic(context.Background()).Execute()
-    if err != nil {
-        fmt.Fprintf(os.Stderr, "Error when calling `AuthAPI.TestAuthHttpBasic``: %v\n", err)
-        fmt.Fprintf(os.Stderr, "Full HTTP response: %v\n", r)
-    }
-    // response from `TestAuthHttpBasic`: string
-    fmt.Fprintf(os.Stdout, "Response from `AuthAPI.TestAuthHttpBasic`: %v\n", resp)
+	configuration := openapiclient.NewConfiguration()
+	apiClient := openapiclient.NewAPIClient(configuration)
+	resp, r, err := apiClient.AuthAPI.TestAuthHttpBasic(context.Background()).Execute()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error when calling `AuthAPI.TestAuthHttpBasic``: %v\n", err)
+		fmt.Fprintf(os.Stderr, "Full HTTP response: %v\n", r)
+	}
+	// response from `TestAuthHttpBasic`: string
+	fmt.Fprintf(os.Stdout, "Response from `AuthAPI.TestAuthHttpBasic`: %v\n", resp)
 }
 ```
 
@@ -84,23 +84,23 @@ To test HTTP bearer authentication
 package main
 
 import (
-    "context"
-    "fmt"
-    "os"
-    openapiclient "github.com/GIT_USER_ID/GIT_REPO_ID"
+	"context"
+	"fmt"
+	"os"
+	openapiclient "github.com/GIT_USER_ID/GIT_REPO_ID"
 )
 
 func main() {
 
-    configuration := openapiclient.NewConfiguration()
-    apiClient := openapiclient.NewAPIClient(configuration)
-    resp, r, err := apiClient.AuthAPI.TestAuthHttpBearer(context.Background()).Execute()
-    if err != nil {
-        fmt.Fprintf(os.Stderr, "Error when calling `AuthAPI.TestAuthHttpBearer``: %v\n", err)
-        fmt.Fprintf(os.Stderr, "Full HTTP response: %v\n", r)
-    }
-    // response from `TestAuthHttpBearer`: string
-    fmt.Fprintf(os.Stdout, "Response from `AuthAPI.TestAuthHttpBearer`: %v\n", resp)
+	configuration := openapiclient.NewConfiguration()
+	apiClient := openapiclient.NewAPIClient(configuration)
+	resp, r, err := apiClient.AuthAPI.TestAuthHttpBearer(context.Background()).Execute()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error when calling `AuthAPI.TestAuthHttpBearer``: %v\n", err)
+		fmt.Fprintf(os.Stderr, "Full HTTP response: %v\n", r)
+	}
+	// response from `TestAuthHttpBearer`: string
+	fmt.Fprintf(os.Stdout, "Response from `AuthAPI.TestAuthHttpBearer`: %v\n", resp)
 }
 ```