Fix dependency printing issue (#83)

apps/cli/src/actions/submit/submit_action.ts

@@ -160,16 +160,10 @@ export async function submitAction(
 
     if (prFooterChanged) {
       execSync(
-        `gh pr edit ${prInfo.number} --body '${
-          prInfo.body?.replace(
-            new RegExp(
-              footerTitle +
-                '[\\s\\S]*' +
-                footerFooter.replace(/[.*+?^${}()|[\]\\]/g, '\\$&') // footerFooter contains special regex characters that must be escaped
-            ),
-            '' // instead of just replacing with footer we handle the case where there is no existing footer
-          ) + footer
-        }'
+        `gh pr edit ${prInfo.number} --body '${updatePrBodyFooter(
+          prInfo.body,
+          footer
+        )}'
       `
       );
 
@@ -186,6 +180,26 @@ export async function submitAction(
   }
 }
 
+export function updatePrBodyFooter(
+  body: string | undefined,
+  footer: string
+): string {
+  if (!body) {
+    return footer;
+  }
+
+  const regex = new RegExp(
+    `${footerTitle}[\\s\\S]*${footerFooter.replace(
+      /[.*+?^${}()|[\]\\]/g,
+      '\\$&'
+    )}`
+  );
+
+  const updatedBody = body.replace(regex, footer);
+
+  return updatedBody;
+}
+
 async function selectBranches(
   context: TContext,
   branchNames: string[]

apps/cli/test/actions/submit_action.test.ts

@@ -2,6 +2,7 @@ import { expect, use } from 'chai';
 import chaiAsPromised from 'chai-as-promised';
 import { inferPRBody } from '../../src/actions/submit/pr_body';
 import { getPRTitle } from '../../src/actions/submit/pr_title';
+import { updatePrBodyFooter } from '../../src/actions/submit/submit_action';
 import { validateNoEmptyBranches } from '../../src/actions/submit/validate_branches';
 import { BasicScene } from '../lib/scenes/basic_scene';
 import { configureTest } from '../lib/utils/configure_test';
@@ -119,3 +120,48 @@ for (const scene of [new BasicScene()]) {
     });
   });
 }
+
+describe('updatePrBodyFooter', () => {
+  const newFooter = `
+  #### PR Dependency Tree
+
+
+  * **PR #83** 👈
+
+  This tree was auto-generated by [Charcoal](https://github.com/danerwilliams/charcoal)
+  `;
+
+  describe('when there is no existing body', () => {
+    it('adds the footer', () => {
+      const updatedPrBodyFooter = updatePrBodyFooter(undefined, newFooter);
+
+      expect(newFooter).equal(updatedPrBodyFooter);
+    });
+  });
+
+  describe('when there is already a body', () => {
+    it('replaces the footer', () => {
+      const existingBody = `
+      Fix issue where dependency tree prints multiple times
+
+      **Changes In This Pull Request:**
+
+      **Test Plan:**
+
+      ![CleanShot 2024-02-08 at 21 18 49@2x](https://github.com/danerwilliams/charcoal/assets/22798229/3821e8dc-d6df-4e1d-bd4b-2ed5ccf7aec9)
+
+
+      #### PR Dependency Tree
+
+
+      * **PR #83** 👈
+
+      This tree was auto-generated by [Charcoal](https://github.com/danerwilliams/charcoal)
+      `;
+
+      const updatedPrBody = updatePrBodyFooter(existingBody, newFooter);
+
+      expect(existingBody).equal(updatedPrBody);
+    });
+  });
+});