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platforms: implement matcher support

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Matching support is now implemented in the platforms package. The
`Parse` function now returns a matcher object that can be used to
match OCI platform specifications. We define this as an interface to
allow the creation of helpers oriented around platform selection.

Signed-off-by: Stephen J Day <stephen.day@docker.com>
This commit is contained in:
Stephen J Day
2017-09-08 17:55:07 -07:00
parent fb0688362c
commit 94f6be5f10
6 changed files with 160 additions and 44 deletions
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4
differ/differ.go
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@@ -66,7 +66,7 @@ func (s *walkingDiff) Apply(ctx context.Context, desc ocispec.Descriptor, mounts
if strings.HasSuffix(desc.MediaType, ".tar.gzip") || strings.HasSuffix(desc.MediaType, ".tar+gzip") {
isCompressed = true
} else if !strings.HasSuffix(desc.MediaType, ".tar") {
return emptyDesc, errors.Wrapf(errdefs.ErrNotSupported, "unsupported diff media type: %v", desc.MediaType)
return emptyDesc, errors.Wrapf(errdefs.ErrNotImplemented, "unsupported diff media type: %v", desc.MediaType)
}
}
@@ -128,7 +128,7 @@ func (s *walkingDiff) DiffMounts(ctx context.Context, lower, upper []mount.Mount
media = ocispec.MediaTypeImageLayerGzip
isCompressed = true
default:
return emptyDesc, errors.Wrapf(errdefs.ErrNotSupported, "unsupported diff media type: %v", media)
return emptyDesc, errors.Wrapf(errdefs.ErrNotImplemented, "unsupported diff media type: %v", media)
}
aDir, err := ioutil.TempDir("", "left-")
if err != nil {