func (*metadataHelperSuite) TestReadWriteMetadata(c *gc.C) {
metadata := []*tools.ToolsMetadata{{
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, gc.IsNil)
out, err := tools.ReadMetadata(stor)
c.Assert(out, gc.HasLen, 0)
c.Assert(err, gc.IsNil) // non-existence is not an error
err = tools.WriteMetadata(stor, metadata, tools.DoNotWriteMirrors)
c.Assert(err, gc.IsNil)
out, err = tools.ReadMetadata(stor)
for _, md := range out {
// FullPath is set by ReadMetadata.
c.Assert(md.FullPath, gc.Not(gc.Equals), "")
md.FullPath = ""
}
c.Assert(out, gc.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, toolsList coretools.List, writeMirrors envtools.ShouldWriteMirrors) error {
existing, err := envtools.ReadMetadata(stor)
if err != nil {
return err
}
metadata := envtools.MetadataFromTools(toolsList)
if metadata, err = envtools.MergeMetadata(metadata, existing); err != nil {
return err
}
if err = envtools.ResolveMetadata(stor, metadata); err != nil {
return err
}
return envtools.WriteMetadata(stor, metadata, writeMirrors)
}