As discussed in RFC-0005, this introduces a `Digest` field to the
`Artifact` in favor of the now deprecated `Checksum`.

Signed-off-by: Hidde Beydals <hello@hidde.co>

Signed-off-by: Hidde Beydals <hello@hidde.co>

Signed-off-by: Hidde Beydals <hello@hidde.co>

This algorithm is used by Git commit SHAs, and opens up the digest API
to work with these references.

Signed-off-by: Hidde Beydals <hello@hidde.co>

Signed-off-by: Hidde Beydals <hello@hidde.co>

Signed-off-by: Hidde Beydals <hello@hidde.co>

This ensures the revision is correctly parsed for `Bucket` and
`GitRepository` sources from which a chart is built, either in the
legacy or new RFC-0005 format.

Signed-off-by: Hidde Beydals <hello@hidde.co>

Signed-off-by: Hidde Beydals <hello@hidde.co>

Signed-off-by: Hidde Beydals <hello@hidde.co>

This allows consumers to better handle the transition to the new
RFC-0005 format ("/" -> "@" separation).

Signed-off-by: Hidde Beydals <hello@hidde.co>

Signed-off-by: Hidde Beydals <hello@hidde.co>

This includes changes to the `ChartRepository`, to allow calculating
the revision and digest and tidy things.

In addition, the responsibility of caching the `IndexFile` has been
moved to the reconcilers. As this allowed to remove a lot of
complexities within the `ChartRepository`, and prevented passing on
the cache in general.

Change `HelmRepository`'s Revision to digest

Signed-off-by: Hidde Beydals <hello@hidde.co>

Signed-off-by: Hidde Beydals <hello@hidde.co>

Signed-off-by: Hidde Beydals <hello@hidde.co>

Signed-off-by: Hidde Beydals <hello@hidde.co>

Resolving it to a local path does not make it more unique, while
resulting in longer keys and a lot of safejoin calls.

Signed-off-by: Hidde Beydals <hello@hidde.co>

Signed-off-by: Hidde Beydals <hello@hidde.co>