[#11383] Add detection of PRs linking to closed issues

.github/workflows/pr.yml

@@ -13,31 +13,49 @@ jobs:
     permissions:
       pull-requests: write
     steps:
-    - uses: actions/github-script@v7
-      with:
-        script: |
-          const pr = await github.rest.pulls.get({
-            owner: context.repo.owner,
-            repo: context.repo.repo,
-            pull_number: context.issue.number
-          })
-          const isTitleValid = /^\[#\d+\] /.test(pr.data.title)
-          const isDescriptionValid = /([Ff]ix(es|ed)?|[Cc]lose(s|d)?|[Rr]esolve(s|d)?|[Pp]art [Oo]f) #\d+/.test(pr.data.body)
-          if (isTitleValid && isDescriptionValid) {
-            return
-          }
-          let body = `Hi @${pr.data.user.login}, thank you for your interest in contributing to TEAMMATES!
-            However, your PR does not appear to follow our [contribution guidelines](https://teammates.github.io/teammates/process.html#step-4-submit-a-pr):\n\n`
-          if (!isTitleValid) {
-            body += "- Title must start with the issue number the PR is fixing in square brackets, e.g. `[#<issue-number>]`\n"
-          }
-          if (!isDescriptionValid) {
-            body += "- Description must reference the issue number the PR is fixing, e.g. `Fixes #<issue-number>` (or `Part of #<issue-number>` if the PR does not address the issue fully)\n"
-          }
-          body += "\nPlease address the above before we proceed to review your PR."
-          await github.rest.issues.createComment({
-            issue_number: context.issue.number,
-            owner: context.repo.owner,
-            repo: context.repo.repo,
-            body,
-          })
+      - uses: actions/github-script@v7
+        with:
+          script: |
+            const pr = await github.rest.pulls.get({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              pull_number: context.issue.number
+            })
+            const isTitleValid = /^\[#\d+\] /.test(pr.data.title)
+            const isDescriptionValid = /([Ff]ix(es|ed)?|[Cc]lose(s|d)?|[Rr]esolve(s|d)?|[Pp]art [Oo]f) #\d+/.test(pr.data.body)
+            const descriptionRegex = /(?:[Ff]ix(?:es|ed)?|[Cc]lose(?:s|d)?|[Rr]esolve(?:s|d)?|[Pp]art [Oo]f) #(\d+)/
+            const extractIssueNumber = (description) => {
+              const match = description.match(descriptionRegex)
+              return match ? parseInt(match[1]) : null
+            };
+            const issueNumber = extractIssueNumber(pr.data.body)
+            let isIssueOpen = false
+            if (issueNumber) {
+              const issue = await github.rest.issues.get({
+                  owner: 'TEAMMATES',
+                  repo: 'teammates',
+                issue_number: issueNumber
+              })
+              isIssueOpen = issue.data.state === 'open'
+              if (isTitleValid && isDescriptionValid && isIssueOpen) {
+                return
+              }
+            }
+            let body = `Hi @${pr.data.user.login}, thank you for your interest in contributing to TEAMMATES!
+              However, your PR does not appear to follow our [contribution guidelines](https://teammates.github.io/teammates/process.html#step-4-submit-a-pr):\n\n`
+            if (!isTitleValid) {
+              body += "- Title must start with the issue number the PR is fixing in square brackets, e.g. `[#<issue-number>]`\n"
+            }
+            if (!isDescriptionValid) {
+              body += "- Description must reference the issue number the PR is fixing, e.g. `Fixes #<issue-number>` (or `Part of #<issue-number>` if the PR does not address the issue fully)\n"
+            }
+            if (!isIssueOpen && issueNumber) {
+              body += "- The issue referenced in the description (#" + issueNumber + ") is not open.\n"
+            }
+            body += "\nPlease address the above before we proceed to review your PR."
+            await github.rest.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body,
+            })