forked from juju/juju
/
validation.go
75 lines (69 loc) · 2.19 KB
/
validation.go
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// Copyright 2013 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.
package tools
import (
"fmt"
"github.com/juju/version"
"github.com/juju/juju/environs/simplestreams"
jujuversion "github.com/juju/juju/version"
)
// ToolsMetadataLookupParams is used to query metadata for matching tools.
type ToolsMetadataLookupParams struct {
simplestreams.MetadataLookupParams
Version string
Major int
Minor int
}
// ValidateToolsMetadata attempts to load tools metadata for the specified cloud attributes and returns
// any tools versions found, or an error if the metadata could not be loaded.
func ValidateToolsMetadata(params *ToolsMetadataLookupParams) ([]string, *simplestreams.ResolveInfo, error) {
if len(params.Sources) == 0 {
return nil, nil, fmt.Errorf("required parameter sources not specified")
}
if params.Version == "" && params.Major == 0 {
params.Version = jujuversion.Current.String()
}
var toolsConstraint *ToolsConstraint
if params.Version == "" {
toolsConstraint = NewGeneralToolsConstraint(params.Major, params.Minor, simplestreams.LookupParams{
CloudSpec: simplestreams.CloudSpec{
Region: params.Region,
Endpoint: params.Endpoint,
},
Stream: params.Stream,
Series: []string{params.Series},
Arches: params.Architectures,
})
} else {
versNum, err := version.Parse(params.Version)
if err != nil {
return nil, nil, err
}
toolsConstraint = NewVersionedToolsConstraint(versNum, simplestreams.LookupParams{
CloudSpec: simplestreams.CloudSpec{
Region: params.Region,
Endpoint: params.Endpoint,
},
Stream: params.Stream,
Series: []string{params.Series},
Arches: params.Architectures,
})
}
matchingTools, resolveInfo, err := Fetch(params.Sources, toolsConstraint)
if err != nil {
return nil, resolveInfo, err
}
if len(matchingTools) == 0 {
return nil, resolveInfo, fmt.Errorf("no matching tools found for constraint %+v", toolsConstraint)
}
versions := make([]string, len(matchingTools))
for i, tm := range matchingTools {
vers := version.Binary{
Number: version.MustParse(tm.Version),
Series: tm.Release,
Arch: tm.Arch,
}
versions[i] = vers.String()
}
return versions, resolveInfo, nil
}