Golang tools.ReadAllMetadata函數代碼示例

func (*metadataHelperSuite) TestReadWriteMetadataSingleStream(c *gc.C) {
	metadata := map[string][]*tools.ToolsMetadata{
		"released": {{
			Release: "precise",
			Version: "1.2.3",
			Arch:    "amd64",
			Path:    "path1",
		}, {
			Release: "raring",
			Version: "1.2.3",
			Arch:    "amd64",
			Path:    "path2",
		}},
	}

	stor, err := filestorage.NewFileStorageWriter(c.MkDir())
	c.Assert(err, jc.ErrorIsNil)
	out, err := tools.ReadAllMetadata(stor)
	c.Assert(err, jc.ErrorIsNil) // non-existence is not an error
	c.Assert(out, gc.HasLen, 0)
	err = tools.WriteMetadata(stor, metadata, []string{"released"}, tools.DoNotWriteMirrors)
	c.Assert(err, jc.ErrorIsNil)

	// Read back what was just written.
	out, err = tools.ReadAllMetadata(stor)
	c.Assert(err, jc.ErrorIsNil)
	for _, outMetadata := range out {
		for _, md := range outMetadata {
			// FullPath is set by ReadAllMetadata.
			c.Assert(md.FullPath, gc.Not(gc.Equals), "")
			md.FullPath = ""
		}
	}
	c.Assert(out, jc.DeepEquals, metadata)
}

func (*metadataHelperSuite) writeMetadataMultipleStream(c *gc.C) (storage.StorageReader, map[string][]*tools.ToolsMetadata) {
	metadata := map[string][]*tools.ToolsMetadata{
		"released": {{
			Release: "precise",
			Version: "1.2.3",
			Arch:    "amd64",
			Path:    "path1",
		}},
		"proposed": {{
			Release: "raring",
			Version: "1.2.3",
			Arch:    "amd64",
			Path:    "path2",
		}},
	}

	stor, err := filestorage.NewFileStorageWriter(c.MkDir())
	c.Assert(err, jc.ErrorIsNil)
	out, err := tools.ReadAllMetadata(stor)
	c.Assert(out, gc.HasLen, 0)
	c.Assert(err, jc.ErrorIsNil) // non-existence is not an error
	err = tools.WriteMetadata(stor, metadata, []string{"released", "proposed"}, tools.DoNotWriteMirrors)
	c.Assert(err, jc.ErrorIsNil)
	return stor, metadata
}

func (*metadataHelperSuite) TestReadMetadataPrefersNewIndex(c *gc.C) {
	if runtime.GOOS == "windows" {
		c.Skip("Skipped for now because of introduced regression")
	}
	metadataDir := c.MkDir()

	// Generate metadata and rename index to index.json
	metadata := map[string][]*tools.ToolsMetadata{
		"proposed": {{
			Release: "precise",
			Version: "1.2.3",
			Arch:    "amd64",
			Path:    "path1",
		}},
		"released": {{
			Release: "trusty",
			Version: "1.2.3",
			Arch:    "amd64",
			Path:    "path1",
		}},
	}
	stor, err := filestorage.NewFileStorageWriter(metadataDir)
	c.Assert(err, jc.ErrorIsNil)
	err = tools.WriteMetadata(stor, metadata, []string{"proposed", "released"}, tools.DoNotWriteMirrors)
	c.Assert(err, jc.ErrorIsNil)
	err = os.Rename(
		filepath.Join(metadataDir, "tools", "streams", "v1", "index2.json"),
		filepath.Join(metadataDir, "tools", "streams", "v1", "index.json"),
	)
	c.Assert(err, jc.ErrorIsNil)

	// Generate different metadata with index2.json
	metadata = map[string][]*tools.ToolsMetadata{
		"released": {{
			Release: "precise",
			Version: "1.2.3",
			Arch:    "amd64",
			Path:    "path1",
		}},
	}
	err = tools.WriteMetadata(stor, metadata, []string{"released"}, tools.DoNotWriteMirrors)
	c.Assert(err, jc.ErrorIsNil)

	// Read back all metadata, expecting to find metadata in index2.json.
	out, err := tools.ReadAllMetadata(stor)
	for _, outMetadata := range out {
		for _, md := range outMetadata {
			// FullPath is set by ReadAllMetadata.
			c.Assert(md.FullPath, gc.Not(gc.Equals), "")
			md.FullPath = ""
		}
	}
	c.Assert(out, jc.DeepEquals, metadata)
}

func (s *metadataHelperSuite) TestReadWriteMetadataMultipleStream(c *gc.C) {
	stor, metadata := s.writeMetadataMultipleStream(c)
	// Read back what was just written.
	out, err := tools.ReadAllMetadata(stor)
	c.Assert(err, jc.ErrorIsNil)
	for _, outMetadata := range out {
		for _, md := range outMetadata {
			// FullPath is set by ReadAllMetadata.
			c.Assert(md.FullPath, gc.Not(gc.Equals), "")
			md.FullPath = ""
		}
	}
	c.Assert(out, jc.DeepEquals, metadata)
}

// This is essentially the same as tools.MergeAndWriteMetadata, but also
// resolves metadata for existing tools by fetching them and computing
// size/sha256 locally.
func mergeAndWriteMetadata(
	stor storage.Storage, toolsDir, stream string, clean bool, toolsList coretools.List, writeMirrors envtools.ShouldWriteMirrors,
) error {
	existing, err := envtools.ReadAllMetadata(stor)
	if err != nil {
		return err
	}
	if clean {
		delete(existing, stream)
	}
	metadata := envtools.MetadataFromTools(toolsList, toolsDir)
	var mergedMetadata []*envtools.ToolsMetadata
	if mergedMetadata, err = envtools.MergeMetadata(metadata, existing[stream]); err != nil {
		return err
	}
	if err = envtools.ResolveMetadata(stor, toolsDir, mergedMetadata); err != nil {
		return err
	}
	existing[stream] = mergedMetadata
	return envtools.WriteMetadata(stor, existing, []string{stream}, writeMirrors)
}