infra: Fix PR triage once and for all (#5442)

Switch to a custom made python script that query GitHub API to grab latest state of the PR after label assign.

.github/assign/audio.yml

@@ -1,8 +0,0 @@
-addReviewers: true
-
-reviewers:
-  - marysaka
-
-filterLabels:
-  include:
-    - audio

.github/assign/cpu.yml

@@ -1,11 +0,0 @@
-addReviewers: true
-
-reviewers:
-  - gdkchan
-  - riperiperi
-  - marysaka
-  - LDj3SNuD
-
-filterLabels:
-  include:
-    - cpu

.github/assign/global.yml

@@ -1,4 +0,0 @@
-addReviewers: true
-
-reviewers:
-  - Ryujinx/developers

.github/assign/gpu.yml

@@ -1,10 +0,0 @@
-addReviewers: true
-
-reviewers:
-  - gdkchan
-  - riperiperi
-  - marysaka
-
-filterLabels:
-  include:
-    - gpu

.github/assign/gui.yml

@@ -1,11 +0,0 @@
-addReviewers: true
-
-reviewers:
-  - Ack77
-  - emmauss
-  - TSRBerry
-  - marysaka
-
-filterLabels:
-  include:
-    - gui

.github/assign/horizon.yml

@@ -1,11 +0,0 @@
-addReviewers: true
-
-reviewers:
-  - gdkchan
-  - Ack77
-  - marysaka
-  - TSRBerry
-
-filterLabels:
-  include:
-    - horizon

.github/assign/infra.yml

@@ -1,9 +0,0 @@
-addReviewers: true
-
-reviewers:
-  - marysaka
-  - TSRBerry
-
-filterLabels:
-  include:
-    - infra

.github/reviewers.yml

@@ -0,0 +1,32 @@
+audio:
+  - marysaka
+
+cpu:
+  - gdkchan
+  - riperiperi
+  - marysaka
+  - LDj3SNuD
+
+gpu:
+  - gdkchan
+  - riperiperi
+  - marysaka
+
+gui:
+  - Ack77
+  - emmauss
+  - TSRBerry
+  - marysaka
+
+horizon:
+  - gdkchan
+  - Ack77
+  - marysaka
+  - TSRBerry
+
+infra:
+  - marysaka
+  - TSRBerry
+
+default:
+  - "@Ryujinx/developers"

.github/update_reviewers.py

@@ -0,0 +1,79 @@
+from pathlib import Path
+from typing import List, Set
+from github import Github
+from github.Repository import Repository
+from github.GithubException import GithubException
+
+import sys
+import yaml
+
+
+def add_reviewers(
+    reviewers: Set[str], team_reviewers: Set[str], new_entries: List[str]
+):
+    for reviewer in new_entries:
+        if reviewer.startswith("@"):
+            team_reviewers.add(reviewer[1:])
+        else:
+            reviewers.add(reviewer)
+
+
+def update_reviewers(config, repo: Repository, pr_id: int) -> int:
+    pull_request = repo.get_pull(pr_id)
+
+    if not pull_request:
+        sys.stderr.writable(f"Unknown PR #{pr_id}\n")
+        return 1
+
+    pull_request_author = pull_request.user.login
+    reviewers = set()
+    team_reviewers = set()
+
+    for label in pull_request.labels:
+        if label.name in config:
+            add_reviewers(reviewers, team_reviewers, config[label.name])
+
+    if "default" in config:
+        add_reviewers(reviewers, team_reviewers, config["default"])
+
+    if pull_request_author in reviewers:
+        reviewers.remove(pull_request_author)
+
+    try:
+        reviewers = list(reviewers)
+        team_reviewers = list(team_reviewers)
+        print(
+            f"Attempting to assign reviewers ({reviewers}) and team_reviewers ({team_reviewers})"
+        )
+        pull_request.create_review_request(reviewers, team_reviewers)
+        return 0
+    except GithubException as e:
+        sys.stderr.write(f"Cannot assign review request for PR #{pr_id}: {e}\n")
+        return 1
+
+
+if __name__ == "__main__":
+    if len(sys.argv) != 5:
+        sys.stderr.write("usage: <token> <repo_path> <pr_id> <config_path>\n")
+        sys.exit(1)
+
+    token = sys.argv[1]
+    repo_path = sys.argv[2]
+    pr_id = int(sys.argv[3])
+    config_path = Path(sys.argv[4])
+
+    g = Github(token)
+    repo = g.get_repo(repo_path)
+
+    if not repo:
+        sys.stderr.write("Repository not found!\n")
+        sys.exit(1)
+
+    if not config_path.exists():
+        sys.stderr.write(f'Config "{config_path}" not found!\n')
+        sys.exit(1)
+
+    with open(config_path, "r") as f:
+        config = yaml.safe_load(f)
+
+    sys.exit(update_reviewers(config, repo, pr_id))

.github/workflows/pr_triage.yml

@@ -12,43 +12,23 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
+      # Grab sources to get update_reviewers.py and reviewers.yml
+      - name: Fetch sources
+        uses: actions/checkout@v3
+        with:
+          # Ensure we pin the source origin as pull_request_target run under forks.
+          fetch-depth: 0
+          repository: Ryujinx/Ryujinx
+          ref: master
+
       - name: Update labels based on changes
         uses: actions/labeler@v4
         with:
           sync-labels: true
           dot: true
 
-      - name: Auto Assign [Audio]
-        uses: kentaro-m/auto-assign-action@v1.2.5
-        with:
-          configuration-path: '.github/assign/audio.yml'
-
-      - name: Auto Assign [CPU]
-        uses: kentaro-m/auto-assign-action@v1.2.5
-        with:
-          configuration-path: '.github/assign/cpu.yml'
-
-      - name: Auto Assign [GPU]
-        uses: kentaro-m/auto-assign-action@v1.2.5
-        with:
-          configuration-path: '.github/assign/gpu.yml'
-
-      - name: Auto Assign [GUI]
-        uses: kentaro-m/auto-assign-action@v1.2.5
-        with:
-          configuration-path: '.github/assign/gui.yml'
-
-      - name: Auto Assign [Horizon]
-        uses: kentaro-m/auto-assign-action@v1.2.5
-        with:
-          configuration-path: '.github/assign/horizon.yml'
-
-      - name: Auto Assign [Infra]
-        uses: kentaro-m/auto-assign-action@v1.2.5
-        with:
-          configuration-path: '.github/assign/infra.yml'
-
-      - name: Auto Assign [Global]
-        uses: kentaro-m/auto-assign-action@v1.2.5
-        with:
-          configuration-path: '.github/assign/global.yml'
+      - name: Assign reviewers
+        run: |
+          pip3 install PyGithub
+          python3 .github/update_reviewers.py ${{ secrets.GITHUB_TOKEN }} ${{ github.repository }} ${{ github.event.pull_request.number }} .github/reviewers.yml
+        shell: bash