deprecate set output

Author: peterjgrainger

README.md

@@ -14,10 +14,18 @@ This action creates a new branch with the same commit reference as the branch it
 
 ## Outputs
 
-### `created`
+### `created` 
+
+***WARNING. DEPRECATED. USE BRANCH_CREATED ENVIRONMENT VARIABLE***
 
 Boolean value representing whether or not a new branch was created.
 
+## Environment Variables Set
+
+### `BRANCH_CREATED`
+
+Boolean value representing whether or not a new branch was created. This environment variable can be used in susequent steps in your workflow.
+
 ## Example usage
 
 ```

dist/index.js

@@ -370,6 +370,8 @@ function run() {
             core.debug(`Creating branch ${branch}`);
             const isCreated = yield (0, create_branch_1.createBranch)(github_1.getOctokit, github_1.context, branch, sha);
             core.setOutput('created', Boolean(isCreated));
+            core.warning('Deprecation warning: If you are using the created output, this will be removed in future versions. Please use the BRANCH_CREATED environment variable instead.');
+            core.exportVariable('BRANCH_CREATED', Boolean(isCreated));
         }
         catch (error) {
             core.setFailed(error.message);

src/main.ts

@@ -9,6 +9,8 @@ async function run() {
     core.debug(`Creating branch ${branch}`);
     const isCreated = await createBranch(getOctokit, context, branch, sha);
     core.setOutput('created', Boolean(isCreated));
+    core.warning('Deprecation warning: If you are using the created output, this will be removed in future versions. Please use the BRANCH_CREATED environment variable instead.');
+    core.exportVariable('BRANCH_CREATED', Boolean(isCreated));
   } catch (error: any) {
     core.setFailed(error.message);
   }