Add script to purge old deployment bundles from S3

.github/workflows/deploy.yml

@@ -120,6 +120,10 @@ jobs:
       - uses: actions/checkout@v4
         with:
           submodules: recursive
+      - uses: actions/setup-python@v4
+        with:
+          python-version: "3.11"
+          cache: pip
 
       - uses: aws-actions/configure-aws-credentials@v4
         with:
@@ -165,3 +169,9 @@ jobs:
         run: |
           aws deploy wait deployment-successful \
             --deployment-id ${{ steps.create-deployment.outputs.deployment-id }}
+        
+      - name: Install Python packages
+        run: pip install .[codedeploy]
+
+      - name: Purge old deployment bundles
+        run: python scripts/github/purge_deployments.py ${{ env.S3_BUCKET }} ${{ env.STACK_NAME }}

pyproject.toml

@@ -20,6 +20,11 @@ aws-cdk = [
     "aws-cdk-lib==2.102.0",
     "aws-cdk-github-oidc==2.4.0",
 ]
+codedeploy = [
+    "boto3~=1.34",
+    "boto3-stubs-lite[s3]",
+    "typer~=0.9",
+]
 scripts = [
     "discord.py~=2.3.2",
     "jproperties~=2.1",
@@ -47,7 +52,7 @@ target-linux = [ # x86_64-unknown-linux-gnu
     "hexnumgen @ {root:uri}/vendor/hexnumgen-0.2.0-cp311-cp311-manylinux_2_28_x86_64.whl",
 ]
 dev = [
-    "HexBug[aws-cdk,scripts,runtime,target-any]",
+    "HexBug[aws-cdk,codedeploy,scripts,runtime,target-any]",
 ]
 
 [project.urls]

scripts/github/purge_deployments.py

@@ -0,0 +1,36 @@
+from typing import Optional
+
+import boto3
+from mypy_boto3_s3 import S3ServiceResource
+from typer import Typer
+
+app = Typer(
+    pretty_exceptions_enable=False,
+)
+
+
+@app.command()
+def main(
+    bucket_name: str,
+    prefix: str,
+    *,
+    keep: int = 5,
+    profile: Optional[str] = None,
+):
+    session = boto3.Session(profile_name=profile)
+    s3: S3ServiceResource = session.resource("s3")
+
+    bucket = s3.Bucket(bucket_name)
+
+    objects = sorted(
+        bucket.objects.filter(Prefix=prefix),
+        key=lambda o: o.last_modified,
+        reverse=True,
+    )
+    for obj in objects[keep:]:
+        print(f"Deleting object: {obj.key}")
+        obj.delete()
+
+
+if __name__ == "__main__":
+    app()