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collect.go
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collect.go
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// Copyright 2022 Namespace Labs Inc; All rights reserved.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
package compute
import (
"context"
"fmt"
"namespacelabs.dev/foundation/std/tasks"
)
func Merge[V any](desc string, c Computable[[]ResultWithTimestamp[[]V]]) Computable[[]V] {
return Transform(desc, c, func(ctx context.Context, wrapped []ResultWithTimestamp[[]V]) ([]V, error) {
var values []V
for _, v := range wrapped {
values = append(values, v.Value...)
}
return values, nil
})
}
func Collect[V any](ev *tasks.ActionEvent, computables ...Computable[V]) Computable[[]ResultWithTimestamp[V]] {
return &collect[V]{ev: ev, computables: computables}
}
type collect[V any] struct {
ev *tasks.ActionEvent
computables []Computable[V]
LocalScoped[[]ResultWithTimestamp[V]]
}
func (c *collect[V]) computableName(k int) string {
name, _ := tasks.NameOf(c.ev)
return fmt.Sprintf("%s[%d]", name, k)
}
func (c *collect[V]) Inputs() *In {
in := Inputs()
for k, computable := range c.computables {
if computable != nil {
in = in.Computable(c.computableName(k), computable)
}
}
return in
}
func (c *collect[V]) Action() *tasks.ActionEvent { return c.ev }
func (c *collect[V]) Compute(ctx context.Context, deps Resolved) ([]ResultWithTimestamp[V], error) {
results := make([]ResultWithTimestamp[V], len(c.computables))
for k, computable := range c.computables {
if computable == nil {
continue
}
v, _ := GetDep(deps, computable, c.computableName(k))
var typed ResultWithTimestamp[V]
typed.ActionID = v.ActionID
typed.Started = v.Started
typed.Completed = v.Completed
typed.Set = true
typed.Value = v.Value
typed.Cached = v.Cached
typed.Digest = v.Digest
typed.NonDeterministic = v.NonDeterministic
results[k] = typed
}
return results, nil
}