[llvm] [workflows] Create a more descriptive title and body when creating a PR for backports (PR #80396)

[Tom Stellard via llvm-commits]

https://github.com/tstellar updated https://github.com/llvm/llvm-project/pull/80396

>From 5c1774f408b2c45a353a2a5a538d25a2787e384a Mon Sep 17 00:00:00 2001
From: Tom Stellard <tstellar at redhat.com>
Date: Fri, 2 Feb 2024 07:17:36 +0000
Subject: [PATCH 1/3] [workflows] Create a more descriptive title and body when
 creating a PR for backports

When a backport request is made, the resulting pull request will have a
title like this:

Backport <commit> <commit> .. <First line of HEAD commit for the branch>

And a body that is the commit message of the HEAD commit for the branch
(minus the first line).
---
 llvm/utils/git/github-automation.py | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/llvm/utils/git/github-automation.py b/llvm/utils/git/github-automation.py
index 04698cacbff92..f7eaf1f3ec550 100755
--- a/llvm/utils/git/github-automation.py
+++ b/llvm/utils/git/github-automation.py
@@ -536,7 +536,7 @@ def create_branch(self, commits: List[str]) -> bool:
 
         self.issue_remove_cherry_pick_failed_label()
         return self.create_pull_request(
-            self.branch_repo_owner, self.repo_name, branch_name
+            self.branch_repo_owner, self.repo_name, branch_name, commits
         )
 
     def check_if_pull_request_exists(
@@ -545,7 +545,7 @@ def check_if_pull_request_exists(
         pulls = repo.get_pulls(head=head)
         return pulls.totalCount != 0
 
-    def create_pull_request(self, owner: str, repo_name: str, branch: str) -> bool:
+    def create_pull_request(self, owner: str, repo_name: str, branch: str, commits: List[str]) -> bool:
         """
         Create a pull request in `self.repo_name`.  The base branch of the
         pull request will be chosen based on the the milestone attached to
@@ -567,9 +567,15 @@ def create_pull_request(self, owner: str, repo_name: str, branch: str) -> bool:
             print("PR already exists...")
             return True
         try:
+            commit_message = repo.get_commit(commits[-1]).commit.message
+            message_lines = commit_message.splitlines()
+            body = ""
+            if len(message_lines) > 1:
+                body = "".join(message_lines.splitlines()[1:])
+            title = "Backport {} {}".format(" ".join(commits), message_lines[0])
             pull = repo.create_pull(
-                title=f"PR for {issue_ref}",
-                body="resolves {}".format(issue_ref),
+                title=title,
+                body=body,
                 base=release_branch_for_issue,
                 head=head,
                 maintainer_can_modify=False,

>From 90ed7c04f5c7ec5190899703fb6ec11ace8f9826 Mon Sep 17 00:00:00 2001
From: Tom Stellard <tstellar at redhat.com>
Date: Sat, 3 Feb 2024 23:38:10 +0000
Subject: [PATCH 2/3] Adjust title and description

---
 llvm/utils/git/github-automation.py | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/llvm/utils/git/github-automation.py b/llvm/utils/git/github-automation.py
index f7eaf1f3ec550..0610d40b64ac7 100755
--- a/llvm/utils/git/github-automation.py
+++ b/llvm/utils/git/github-automation.py
@@ -569,10 +569,8 @@ def create_pull_request(self, owner: str, repo_name: str, branch: str, commits:
         try:
             commit_message = repo.get_commit(commits[-1]).commit.message
             message_lines = commit_message.splitlines()
-            body = ""
-            if len(message_lines) > 1:
-                body = "".join(message_lines.splitlines()[1:])
-            title = "Backport {} {}".format(" ".join(commits), message_lines[0])
+            title = "{}: {}".format(release_branch_for_issue, message_lines[0])
+            body = "Backport {}".format(" ".join(commits))
             pull = repo.create_pull(
                 title=title,
                 body=body,

>From e5b51613c120e08f9b1e472eaf64ee7e745c2704 Mon Sep 17 00:00:00 2001
From: Tom Stellard <tstellar at redhat.com>
Date: Sun, 4 Feb 2024 00:20:30 +0000
Subject: [PATCH 3/3] Fix formatting

---
 llvm/utils/git/github-automation.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/llvm/utils/git/github-automation.py b/llvm/utils/git/github-automation.py
index 0610d40b64ac7..c9ab1783daba8 100755
--- a/llvm/utils/git/github-automation.py
+++ b/llvm/utils/git/github-automation.py
@@ -545,7 +545,9 @@ def check_if_pull_request_exists(
         pulls = repo.get_pulls(head=head)
         return pulls.totalCount != 0
 
-    def create_pull_request(self, owner: str, repo_name: str, branch: str, commits: List[str]) -> bool:
+    def create_pull_request(
+        self, owner: str, repo_name: str, branch: str, commits: List[str]
+    ) -> bool:
         """
         Create a pull request in `self.repo_name`.  The base branch of the
         pull request will be chosen based on the the milestone attached to