[BUG] [asciidoc] Unresolvable include path by asciidoctor processor

[LEZIER-S2]

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?

• Have you validated the input using an OpenAPI validator

• What's the version of OpenAPI Generator used?

• Have you search for related issues/PRs?

• What's the actual output vs expected output?

• [Optional] Bounty to sponsor the fix

Description

The asciidoc generator create path that cannot be interpreted by asciidoc processor:

• the specDir and snippetDir attributes generated are not used in asciidoctor include directive

• the path refers of included file can refers to path parameters wrote with curly braces, that is not supported by asciidoc processor.

openapi-generator version

openapi-generator@4.2.3 ( by dependency of openapi-generator-maven-plugin@4.2.3 )

OpenAPI declaration file content or url

files tree:

$: tree asciidoc
asciidoc/
├── api
│   ├── intro.adoc
│   └── resources
│       └── {id}
│           └── GET
│               ├── implementation.adoc
│               └── spec.adoc
└── snippet
    └── resources
        └── {id}
            └── GET
                ├── GET.json
                ├── http-request.adoc
                └── http-response.adoc

OAS file specification.json:

{
    "openapi": "3.0.1",
    "info": {
        "title": "OpenAPI definition",
        "version": "v0"
    },
    "servers": [
    ],
    "paths": {
        "/resources/{id}": {
            "get": {
                "parameters": [
                    {
                        "name": "id",
                        "in": "path",
                        "required": true,
                        "schema": {
                            "type": "string"
                        }
                    }
                ],
                "responses": {
                    "200": {
                        "description": "default response",
                        "content": {
                            "application/json;charset=UTF-8": {
                                "schema": {
                                    "type": "string"
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}

Command line used for generation

java -jar openapi-generator-cli.jar generate \
       -i specification.json \
       -g asciidoc \ 
       -o /tmp/  \ 
       -p specDir=asciidoc/api/ \ 
       -p snippetDir=asciidoc/snippet/

Steps to reproduce

1. Reproduce the repository and file content. The adoc files can be empty.

2. Launch the command.

Related issues/PRs

the index.adoc generated:

= OpenAPI definition
team@openapitools.org
v0
:toc: left
:numbered:
:toclevels: 3
:source-highlighter: highlightjs
:keywords: openapi, rest, OpenAPI definition 
:specDir: ./src/docs/asciidoc/api/
:snippetDir: ./src/docs/asciidoc/snippet/
...

[abstract]
...
include::intro.adoc[opts=optional]
...
===== Description 

include::resources/{id}/GET/spec.adoc[opts=optional]

...
===== Samples

include::resources/{id}/GET/http-request.adoc[opts=optional]

include::resources/{id}/GET/http-response.adoc[opts=optional]

* wiremock data link:resources/{id}/GET/GET.json[]

...
===== Implementation

include::resources/{id}/GET/implementation.adoc[opts=optional]

The include paths do not include snippetDir and specDir attributes.

The include path should escape curly brackets of path parameters.

include::{specDir}intro.adoc[opts=optional]
include::{specDir}resources/\{id\}/GET/spec.adoc[opts=optional]
include::{snippetDir}resources/\{id\}/GET/http-request.adoc[opts=optional]
include::{snippetDir}resources/\{id\}/GET/http-response.adoc[opts=optional]
wiremock data link:{snippetDir}resources/\{id\}/GET/GET.json[]
include::{specDir}resources/\{id\}/GET/implementation.adoc[opts=optional]

Suggest a fix

In AsciidocDocumentationCodegen.java:87 protect parameter path of relativeFileName and then add the attribute for the directory path.