package image import ( "context" "fmt" "io/ioutil" "os" "testing" "github.com/containers/image/transports" "github.com/containers/image/transports/alltransports" "github.com/stretchr/testify/assert" "github.com/stretchr/testify/require" ) func TestGetPullRefName(t *testing.T) { const imageID = "@0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef" const digestSuffix = "@sha256:0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef" for _, c := range []struct{ srcName, destName, expectedImage, expectedDstName string }{ // == Source does not have a Docker reference (as is the case for docker-archive:, oci-archive, dir:); destination formats: { // registry/name, no tag: "dir:/dev/this-does-not-exist", "example.com/from-directory", // The destName value will be interpreted as "example.com/from-directory:latest" by storageTransport. "example.com/from-directory", "example.com/from-directory", }, { // name, no registry, no tag: "dir:/dev/this-does-not-exist", "from-directory", // FIXME(?) Adding a registry also adds a :latest tag. OTOH that actually matches the used destination. // Either way it is surprising that the localhost/ addition changes this. (mitr hoping to remove the "image" member). "localhost/from-directory:latest", "localhost/from-directory:latest", }, { // registry/name:tag : "dir:/dev/this-does-not-exist", "example.com/from-directory:notlatest", "example.com/from-directory:notlatest", "example.com/from-directory:notlatest", }, { // name:tag, no registry: "dir:/dev/this-does-not-exist", "from-directory:notlatest", "localhost/from-directory:notlatest", "localhost/from-directory:notlatest", }, { // name@digest, no registry: "dir:/dev/this-does-not-exist", "from-directory" + digestSuffix, // FIXME?! Why is this dropping the digest, and adding :none?! "localhost/from-directory:none", "localhost/from-directory:none", }, { // registry/name@digest: "dir:/dev/this-does-not-exist", "example.com/from-directory" + digestSuffix, "example.com/from-directory" + digestSuffix, "example.com/from-directory" + digestSuffix, }, { // ns/name:tag, no registry: // FIXME: This is interpreted as "registry == ns" "dir:/dev/this-does-not-exist", "ns/from-directory:notlatest", "ns/from-directory:notlatest", "ns/from-directory:notlatest", }, { // containers-storage image ID "dir:/dev/this-does-not-exist", imageID, imageID, imageID, }, // == Source does have a Docker reference. // In that case getPullListFromRef uses the full transport:name input as a destName, // which would be invalid in the returned dstName - but dstName is derived from the source, so it does not really matter _so_ much. // Note that unlike real-world use we use different :source and :destination to verify the data flow in more detail. { // registry/name:tag "docker://example.com/busybox:source", "docker://example.com/busybox:destination", "docker://example.com/busybox:destination", "example.com/busybox:source", }, { // Implied docker.io/library and :latest "docker://busybox", "docker://busybox:destination", "docker://busybox:destination", "docker.io/library/busybox:latest", }, } { srcRef, err := alltransports.ParseImageName(c.srcName) require.NoError(t, err, c.srcName) res := getPullRefName(srcRef, c.destName) assert.Equal(t, &pullRefName{image: c.expectedImage, srcRef: srcRef, dstName: c.expectedDstName}, res, fmt.Sprintf("%#v %#v", c.srcName, c.destName)) } } func TestRefNamesFromImageReference(t *testing.T) { type expected struct{ image, dstName string } for _, c := range []struct { srcName string expected []expected }{ // == docker-archive: {"docker-archive:/dev/this-does-not-exist", nil}, // Input does not exist. {"docker-archive:/dev/null", nil}, // Input exists but does not contain a manifest. // FIXME: The implementation has extra code for len(manifest) == 0?! That will fail in getImageDigest anyway. { // RepoTags is empty "docker-archive:testdata/docker-unnamed.tar.xz", []expected{{"@ec9293436c2e66da44edb9efb8d41f6b13baf62283ebe846468bc992d76d7951", "@ec9293436c2e66da44edb9efb8d41f6b13baf62283ebe846468bc992d76d7951"}}, }, { // RepoTags is a [docker.io/library/]name:latest, normalized to the short format. "docker-archive:testdata/docker-name-only.tar.xz", []expected{{"localhost/pretty-empty:latest", "localhost/pretty-empty:latest"}}, }, { // RepoTags is a registry/name:latest "docker-archive:testdata/docker-registry-name.tar.xz", []expected{{"example.com/empty:latest", "example.com/empty:latest"}}, }, { // RepoTags has multiple items for a single image "docker-archive:testdata/docker-two-names.tar.xz", []expected{ {"localhost/pretty-empty:latest", "localhost/pretty-empty:latest"}, {"example.com/empty:latest", "example.com/empty:latest"}, }, }, { // FIXME: Two images in a single archive - only the "first" one (whichever it is) is returned // (and docker-archive: then refuses to read anything when the manifest has more than 1 item) "docker-archive:testdata/docker-two-images.tar.xz", []expected{{"example.com/empty:latest", "example.com/empty:latest"}}, // "example.com/empty/but:different" exists but is ignored }, // == oci-archive: {"oci-archive:/dev/this-does-not-exist", nil}, // Input does not exist. {"oci-archive:/dev/null", nil}, // Input exists but does not contain a manifest. // FIXME: The remaining tests are commented out for now, because oci-archive: does not work unprivileged. // { // No name annotation // "oci-archive:testdata/oci-unnamed.tar.gz", // []expected{{"@5c8aca8137ac47e84c69ae93ce650ce967917cc001ba7aad5494073fac75b8b6", "@5c8aca8137ac47e84c69ae93ce650ce967917cc001ba7aad5494073fac75b8b6"}}, // }, // { // Name is a name:latest (no normalization is defined). // "oci-archive:testdata/oci-name-only.tar.gz", // []expected{{"localhost/pretty-empty:latest", "localhost/pretty-empty:latest"}}, // }, // { // Name is a registry/name:latest // "oci-archive:testdata/oci-registry-name.tar.gz", // []expected{{"example.com/empty:latest", "example.com/empty:latest"}}, // }, // { // Name exists, but is an invalid Docker reference; such names are passed through, and will fail when intepreting dstName. // "oci-archive:testdata/oci-non-docker-name.tar.gz", // []expected{{"UPPERCASE-IS-INVALID", "UPPERCASE-IS-INVALID"}}, // }, // Maybe test support of two images in a single archive? It should be transparently handled by adding a reference to srcRef. // == dir: { // Absolute path "dir:/dev/this-does-not-exist", []expected{{"localhost/dev/this-does-not-exist", "localhost/dev/this-does-not-exist"}}, }, { // Relative path, single element. // FIXME? Note the :latest difference in .image. (In .dstName as well, but it has the same semantics in there.) "dir:this-does-not-exist", []expected{{"localhost/this-does-not-exist:latest", "localhost/this-does-not-exist:latest"}}, }, { // Relative path, multiple elements. // FIXME: This does not add localhost/, and dstName is parsed as docker.io/testdata. "dir:testdata/this-does-not-exist", []expected{{"testdata/this-does-not-exist", "testdata/this-does-not-exist"}}, }, // == Others, notably: // === docker:// (has ImageReference.DockerReference) { // Fully-specified input "docker://docker.io/library/busybox:latest", []expected{{"docker://docker.io/library/busybox:latest", "docker.io/library/busybox:latest"}}, }, { // Minimal form of the input "docker://busybox", []expected{{"docker://busybox", "docker.io/library/busybox:latest"}}, }, // === tarball: (as an example of what happens when ImageReference.DockerReference is nil). { // FIXME? The dstName value is invalid, and will fail. // (This is NOT an API promise that the results will continue to be this way.) "tarball:/dev/null", []expected{{"tarball:/dev/null", "tarball:/dev/null"}}, }, } { srcRef, err := alltransports.ParseImageName(c.srcName) require.NoError(t, err, c.srcName) res, err := refNamesFromImageReference(context.Background(), srcRef, c.srcName, nil) if len(c.expected) == 0 { assert.Error(t, err, c.srcName) } else { require.NoError(t, err, c.srcName) require.Len(t, res, len(c.expected), c.srcName) for i, e := range c.expected { assert.Equal(t, &pullRefName{image: e.image, srcRef: srcRef, dstName: e.dstName}, res[i], fmt.Sprintf("%s #%d", c.srcName, i)) } } } } const registriesConfWithSearch = `[registries.search] registries = ['example.com', 'docker.io'] ` func TestRefNamesFromPossiblyUnqualifiedName(t *testing.T) { const digestSuffix = "@sha256:0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef" type pullRefStrings struct{ image, srcRef, dstName string } // pullRefName with string data only registriesConf, err := ioutil.TempFile("", "TestRefNamesFromPossiblyUnqualifiedName") require.NoError(t, err) defer registriesConf.Close() defer os.Remove(registriesConf.Name()) err = ioutil.WriteFile(registriesConf.Name(), []byte(registriesConfWithSearch), 0600) require.NoError(t, err) // Environment is per-process, so this looks very unsafe; actually it seems fine because tests are not // run in parallel unless they opt in by calling t.Parallel(). So don’t do that. oldRCP, hasRCP := os.LookupEnv("REGISTRIES_CONFIG_PATH") defer func() { if hasRCP { os.Setenv("REGISTRIES_CONFIG_PATH", oldRCP) } else { os.Unsetenv("REGISTRIES_CONFIG_PATH") } }() os.Setenv("REGISTRIES_CONFIG_PATH", registriesConf.Name()) for _, c := range []struct { input string expected []pullRefStrings }{ {"#", nil}, // Clearly invalid. { // Fully-explicit docker.io, name-only. "docker.io/library/busybox", // (The docker:// representation is shortened by c/image/docker.Reference but it refers to "docker.io/library".) []pullRefStrings{{"docker.io/library/busybox", "docker://busybox:latest", "docker.io/library/busybox"}}, }, { // docker.io with implied /library/, name-only. "docker.io/busybox", // (The docker:// representation is shortened by c/image/docker.Reference but it refers to "docker.io/library".) // The .dstName fields differ for the explicit/implicit /library/ cases, but StorageTransport.ParseStoreReference normalizes that. []pullRefStrings{{"docker.io/busybox", "docker://busybox:latest", "docker.io/busybox"}}, }, { // Qualified example.com, name-only. "example.com/ns/busybox", []pullRefStrings{{"example.com/ns/busybox", "docker://example.com/ns/busybox:latest", "example.com/ns/busybox"}}, }, { // Qualified example.com, name:tag. "example.com/ns/busybox:notlatest", []pullRefStrings{{"example.com/ns/busybox:notlatest", "docker://example.com/ns/busybox:notlatest", "example.com/ns/busybox:notlatest"}}, }, { // Qualified example.com, name@digest. "example.com/ns/busybox" + digestSuffix, []pullRefStrings{{"example.com/ns/busybox" + digestSuffix, "docker://example.com/ns/busybox" + digestSuffix, // FIXME?! Why is .dstName dropping the digest, and adding :none?! "example.com/ns/busybox:none"}}, }, // Qualified example.com, name:tag@digest. This code is happy to try, but .srcRef parsing currently rejects such input. {"example.com/ns/busybox:notlatest" + digestSuffix, nil}, { // Unqualified, single-name, name-only "busybox", []pullRefStrings{ {"example.com/busybox:latest", "docker://example.com/busybox:latest", "example.com/busybox:latest"}, // (The docker:// representation is shortened by c/image/docker.Reference but it refers to "docker.io/library".) {"docker.io/busybox:latest", "docker://busybox:latest", "docker.io/busybox:latest"}, }, }, { // Unqualified, namespaced, name-only "ns/busybox", // FIXME: This is interpreted as "registry == ns", and actual pull happens from docker.io/ns/busybox:latest; // example.com should be first in the list but isn't used at all. []pullRefStrings{ {"ns/busybox", "docker://ns/busybox:latest", "ns/busybox"}, }, }, { // Unqualified, name:tag "busybox:notlatest", []pullRefStrings{ {"example.com/busybox:notlatest", "docker://example.com/busybox:notlatest", "example.com/busybox:notlatest"}, // (The docker:// representation is shortened by c/image/docker.Reference but it refers to "docker.io/library".) {"docker.io/busybox:notlatest", "docker://busybox:notlatest", "docker.io/busybox:notlatest"}, }, }, { // Unqualified, name@digest "busybox" + digestSuffix, []pullRefStrings{ // FIXME?! Why is .input and .dstName dropping the digest, and adding :none?! {"example.com/busybox:none", "docker://example.com/busybox" + digestSuffix, "example.com/busybox:none"}, // (The docker:// representation is shortened by c/image/docker.Reference but it refers to "docker.io/library".) {"docker.io/busybox:none", "docker://busybox" + digestSuffix, "docker.io/busybox:none"}, }, }, // Unqualified, name:tag@digest. This code is happy to try, but .srcRef parsing currently rejects such input. {"busybox:notlatest" + digestSuffix, nil}, } { res, err := refNamesFromPossiblyUnqualifiedName(c.input) if len(c.expected) == 0 { assert.Error(t, err, c.input) } else { assert.NoError(t, err, c.input) strings := make([]pullRefStrings, len(res)) for i, rn := range res { strings[i] = pullRefStrings{ image: rn.image, srcRef: transports.ImageName(rn.srcRef), dstName: rn.dstName, } } assert.Equal(t, c.expected, strings, c.input) } } }