Multiple projects & Read the Docs for Business

Allow repositories to use this action more than once in their repositories.
This is useful for monolitic repositories with multiple documentation projects.

Others changes included here:

- use a separate script instead of hard coding it into YAML
- use HTML comment as separator for the injected content
- support Read the Docs for Business

action.yaml

@@ -14,49 +14,24 @@ inputs:
     description: "Project's language on Read the Docs"
     default: "en"
     required: false
-  message-separator:
-    description: "Text to separate the original body of the PR from the auto-inserted text"
-    default: "----------"
-    required: false
   message-template:
     description: "Template message to use for the PR body"
-    default: ":books: Documentation preview :books:: {docs-pr-index-url}"
+    default: |
+      ----
+      :books: Documentation preview :books:: {docs-pr-index-url}
+    required: false
+  platform:
+    description: "Read the Docs Community or Read the Docs for Business (community or business)"
+    default: "community"
     required: false
 
 runs:
   using: "composite"
   steps:
+    - uses: actions/checkout@v3
     - name: "Comment on Pull Request with Read the Docs' preview links"
       uses: actions/github-script@v6
       with:
         script: |
-          var PR_NUMBER = context.issue.number;
-          var RTD_PROJECT_SLUG = "${{ inputs.project-slug }}";
-          var RTD_PROJECT_LANGUAGE = "${{ inputs.project-language }}";
-          var RTD_URL = `https://${RTD_PROJECT_SLUG}--${PR_NUMBER}.org.readthedocs.build/${RTD_PROJECT_LANGUAGE}/${PR_NUMBER}/`;
-          var MESSAGE_SEPARATOR = `${{ inputs.message-separator }}`;
-          var MESSAGE_TEMPLATE = `${{ inputs.message-template }}`;
-
-          const { data: pull } = await github.rest.pulls.get({
-            owner: context.repo.owner,
-            repo: context.repo.repo,
-            pull_number: context.issue.number,
-          });
-
-          var body_message = `${MESSAGE_TEMPLATE.replace("{docs-pr-index-url}", RTD_URL)}`;
-
-          var body = "";
-          if (pull.body) {
-            body = pull.body.split(/\r?\n/);
-            body = body.slice(0, body.indexOf(MESSAGE_SEPARATOR));
-            body = body.join("\n").trim()
-          }
-
-          body = body + "\n\n" + MESSAGE_SEPARATOR + "\n\n" + body_message;
-
-          github.rest.pulls.update({
-            owner: context.repo.owner,
-            repo: context.repo.repo,
-            pull_number: context.issue.number,
-            body: body,
-          });
+          const script = require("./scripts/edit-description.js");
+          script({inputs, github, context});

scripts/edit-description.js

@@ -0,0 +1,39 @@
+module.exports = ({inputs, github, context}) => {
+    var PR_NUMBER = context.issue.number;
+    var RTD_PROJECT_SLUG = "${{ inputs.project-slug }}";
+    var RTD_PROJECT_LANGUAGE = "${{ inputs.project-language }}";
+    var RTD_PLATFORM = "${{ inputs.platform }}";
+    if (RTD_PLATFORM == "community") {
+        var RTD_DOMAIN = "org.readthedocs.build";
+    }
+    if (RTD_PLATFORM == "business") {
+        var RTD_DOMAIN = "com.readthedocs.build";
+    }
+    var RTD_URL = `https://${RTD_PROJECT_SLUG}--${PR_NUMBER}.${RTD_DOMAIN}/${RTD_PROJECT_LANGUAGE}/${PR_NUMBER}/`;
+
+    var MESSAGE_SEPARATOR_START = `<!-- readthedocs-preview ${RTD_PROJECT_SLUG} start -->\n`;
+    var MESSAGE_SEPARATOR_END = `\n<!-- readthedocs-preview ${RTD_PROJECT_SLUG} end -->`;
+    var MESSAGE_TEMPLATE = "${{ inputs.message-template }}";
+
+    const { data: pull } = await github.rest.pulls.get({
+        owner: context.repo.owner,
+        repo: context.repo.repo,
+        pull_number: context.issue.number,
+    });
+
+    var body_message = MESSAGE_TEMPLATE.replace("{docs-pr-index-url}", RTD_URL);
+
+    var body = "";
+    if (pull.body) {
+        body = pull.body.slice(0, pull.body.indexOf(MESSAGE_SEPARATOR_START));
+        body = body + MESSAGE_SEPARATOR_START + body_message + MESSAGE_SEPARATOR_END;
+        body = body + pull.body.slice(pull.body.indexOf(MESSAGE_SEPARATOR_END) + MESSAGE_SEPARATOR_END.length);
+    }
+
+    github.rest.pulls.update({
+        owner: context.repo.owner,
+        repo: context.repo.repo,
+        pull_number: context.issue.number,
+        body: body,
+    });
+}