45 lines
1.7 KiB
Plaintext
45 lines
1.7 KiB
Plaintext
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#!/usr/bin/env python3
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"""This script replaces `podman auto-update`. If a digest in a registry has been updated, `podman
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pull` may not necessarily pull the image for quite some time. However, `auto-update` will still try
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every day, but since it doesn't check if the new digest has actually been pulled it will restart the
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service again and again. This script attempts to solve the problem by explicitly checking the digest
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after the pull. However, it assumes that there is only service that needs restarting on updates and
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that its called <username>.service so it is not (yet) a drop-in replacement for `podman
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auto-update`.
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"""
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import getpass
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import json
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import subprocess
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if __name__ == "__main__":
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out = subprocess.run(["podman", "images", "--format", "json"], capture_output=True, check=True)
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images = json.loads(out.stdout)
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updated = []
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for image in images:
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if not image["Names"]:
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continue
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if len(image["Names"]) > 1:
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raise ValueError(f"Multiple names available for image: {image['Names']}")
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name = image["Names"][0]
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subprocess.run(["podman", "pull", name], capture_output=True, check=True)
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out = subprocess.run(["podman", "inspect", "--format", "json", name],
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capture_output=True, check=True)
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inspect = json.loads(out.stdout)
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assert inspect
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if len(inspect) > 1:
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raise ValueError("Podman inspect returned multiple entries")
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if inspect[0]["Digest"] != image["Digest"]:
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updated.append(name)
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if updated:
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print(f"The following images have been updated: {updated}")
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subprocess.run(["systemctl", "--user", "restart", f"{getpass.getuser()}.service"],
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check=True)
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