Returns a image hash from a local image name
(image: str | None = None)
| 385 | |
| 386 | |
| 387 | def get_local_image_digest(image: str | None = None) -> str: |
| 388 | """ |
| 389 | Returns a image hash from a local image name |
| 390 | """ |
| 391 | expected_image = image or expected_image_name() |
| 392 | # `podman images` returns the digest of the multi-architecture image, |
| 393 | # which should match the downloaded signatures on a typical over-the-air |
| 394 | # update scenario. |
| 395 | # `podman inspect` is avoided here as it returns the digest of the |
| 396 | # architecture-bound image. |
| 397 | podman = init_podman_command() |
| 398 | res = podman.run(["images", expected_image, "--format", "{{.Digest}}"]) |
| 399 | assert isinstance(res, str) |
| 400 | lines = set(res.split("\n")) |
| 401 | line_count = len(lines) |
| 402 | |
| 403 | # `podman images` exits 0 with no output when the image is absent, |
| 404 | # at least on some platforms. |
| 405 | if not res or line_count < 1: |
| 406 | raise errors.ImageNotPresentException( |
| 407 | f"The image {expected_image} does not exist locally" |
| 408 | ) |
| 409 | # In some cases, the output can be multiple lines with the same digest |
| 410 | # sets are used to reduce them. |
| 411 | |
| 412 | if line_count > 1: |
| 413 | raise errors.MultipleImagesFoundException( |
| 414 | f"Expected a single line of output, got {line_count} lines: {lines}" |
| 415 | ) |
| 416 | image_digest = lines.pop().replace("sha256:", "") |
| 417 | return image_digest |
nothing calls this directly
no test coverage detected