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inputmapper.go
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/
inputmapper.go
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package inputmapper
import (
"code.cloudfoundry.org/lager"
"github.com/concourse/atc/db/algorithm"
"github.com/concourse/atc/dbng"
"github.com/concourse/atc/scheduler/inputmapper/inputconfig"
)
//go:generate counterfeiter . InputMapper
type InputMapper interface {
SaveNextInputMapping(
logger lager.Logger,
versions *algorithm.VersionsDB,
job dbng.Job,
) (algorithm.InputMapping, error)
}
func NewInputMapper(pipeline dbng.Pipeline, transformer inputconfig.Transformer) InputMapper {
return &inputMapper{pipeline: pipeline, transformer: transformer}
}
type inputMapper struct {
pipeline dbng.Pipeline
transformer inputconfig.Transformer
}
func (i *inputMapper) SaveNextInputMapping(
logger lager.Logger,
versions *algorithm.VersionsDB,
job dbng.Job,
) (algorithm.InputMapping, error) {
logger = logger.Session("save-next-input-mapping")
inputConfigs := job.Config().Inputs()
algorithmInputConfigs, err := i.transformer.TransformInputConfigs(versions, job.Name(), inputConfigs)
if err != nil {
logger.Error("failed-to-get-algorithm-input-configs", err)
return nil, err
}
independentMapping := algorithm.InputMapping{}
for _, inputConfig := range algorithmInputConfigs {
singletonMapping, ok := algorithm.InputConfigs{inputConfig}.Resolve(versions)
if ok {
independentMapping[inputConfig.Name] = singletonMapping[inputConfig.Name]
}
}
err = job.SaveIndependentInputMapping(independentMapping)
if err != nil {
logger.Error("failed-to-save-independent-input-mapping", err)
return nil, err
}
if len(independentMapping) < len(inputConfigs) {
// this is necessary to prevent builds from running with missing pinned versions
err := job.DeleteNextInputMapping()
if err != nil {
logger.Error("failed-to-delete-next-input-mapping-after-missing-pending", err)
}
return nil, err
}
resolvedMapping, ok := algorithmInputConfigs.Resolve(versions)
if !ok {
err := job.DeleteNextInputMapping()
if err != nil {
logger.Error("failed-to-delete-next-input-mapping-after-failed-resolve", err)
}
return nil, err
}
err = job.SaveNextInputMapping(resolvedMapping)
if err != nil {
logger.Error("failed-to-save-next-input-mapping", err)
return nil, err
}
return resolvedMapping, nil
}