terraform/plans/plan.go

78 lines
2.3 KiB
Go

package plans
import (
"sort"
"github.com/hashicorp/terraform/addrs"
)
// Plan is the top-level type representing a planned set of changes.
//
// A plan is a summary of the set of changes required to move from a current
// state to a goal state derived from configuration. The described changes
// are not applied directly, but contain an approximation of the final
// result that will be completed during apply by resolving any values that
// cannot be predicted.
//
// A plan must always be accompanied by the state and configuration it was
// built from, since the plan does not itself include all of the information
// required to make the changes indicated.
type Plan struct {
VariableValues map[string]DynamicValue
Changes *Changes
TargetAddrs []addrs.Targetable
ProviderSHA256s map[string][]byte
Backend Backend
}
// Backend represents the backend-related configuration and other data as it
// existed when a plan was created.
type Backend struct {
// Type is the type of backend that the plan will apply against.
Type string
// Config is the configuration of the backend, whose schema is decided by
// the backend Type.
Config DynamicValue
// Workspace is the name of the workspace that was active when the plan
// was created. It is illegal to apply a plan created for one workspace
// to the state of another workspace.
// (This constraint is already enforced by the statefile lineage mechanism,
// but storing this explicitly allows us to return a better error message
// in the situation where the user has the wrong workspace selected.)
Workspace string
}
// ProviderAddrs returns a list of all of the provider configuration addresses
// referenced throughout the receiving plan.
//
// The result is de-duplicated so that each distinct address appears only once.
func (p *Plan) ProviderAddrs() []addrs.AbsProviderConfig {
if p == nil || p.Changes == nil {
return nil
}
m := map[string]addrs.AbsProviderConfig{}
for _, rc := range p.Changes.Resources {
m[rc.ProviderAddr.String()] = rc.ProviderAddr
}
if len(m) == 0 {
return nil
}
// This is mainly just so we'll get stable results for testing purposes.
keys := make([]string, 0, len(m))
for k := range m {
keys = append(keys, k)
}
sort.Strings(keys)
ret := make([]addrs.AbsProviderConfig, len(keys))
for i, key := range keys {
ret[i] = m[key]
}
return ret
}