github.com/cycloidio/terraform@v1.1.10-0.20220513142504-76d5c768dc63/terraform/context_apply.go (about) 1 package terraform 2 3 import ( 4 "fmt" 5 "log" 6 7 "github.com/cycloidio/terraform/addrs" 8 "github.com/cycloidio/terraform/configs" 9 "github.com/cycloidio/terraform/plans" 10 "github.com/cycloidio/terraform/states" 11 "github.com/cycloidio/terraform/tfdiags" 12 "github.com/zclconf/go-cty/cty" 13 ) 14 15 // Apply performs the actions described by the given Plan object and returns 16 // the resulting updated state. 17 // 18 // The given configuration *must* be the same configuration that was passed 19 // earlier to Context.Plan in order to create this plan. 20 // 21 // Even if the returned diagnostics contains errors, Apply always returns the 22 // resulting state which is likely to have been partially-updated. 23 func (c *Context) Apply(plan *plans.Plan, config *configs.Config) (*states.State, tfdiags.Diagnostics) { 24 defer c.acquireRun("apply")() 25 26 log.Printf("[DEBUG] Building and walking apply graph for %s plan", plan.UIMode) 27 28 graph, operation, diags := c.applyGraph(plan, config, true) 29 if diags.HasErrors() { 30 return nil, diags 31 } 32 33 variables := InputValues{} 34 for name, dyVal := range plan.VariableValues { 35 val, err := dyVal.Decode(cty.DynamicPseudoType) 36 if err != nil { 37 diags = diags.Append(tfdiags.Sourceless( 38 tfdiags.Error, 39 "Invalid variable value in plan", 40 fmt.Sprintf("Invalid value for variable %q recorded in plan file: %s.", name, err), 41 )) 42 continue 43 } 44 45 variables[name] = &InputValue{ 46 Value: val, 47 SourceType: ValueFromPlan, 48 } 49 } 50 51 workingState := plan.PriorState.DeepCopy() 52 walker, walkDiags := c.walk(graph, operation, &graphWalkOpts{ 53 Config: config, 54 InputState: workingState, 55 Changes: plan.Changes, 56 RootVariableValues: variables, 57 }) 58 diags = diags.Append(walker.NonFatalDiagnostics) 59 diags = diags.Append(walkDiags) 60 61 newState := walker.State.Close() 62 if plan.UIMode == plans.DestroyMode && !diags.HasErrors() { 63 // NOTE: This is a vestigial violation of the rule that we mustn't 64 // use plan.UIMode to affect apply-time behavior. 65 // We ideally ought to just call newState.PruneResourceHusks 66 // unconditionally here, but we historically didn't and haven't yet 67 // verified that it'd be safe to do so. 68 newState.PruneResourceHusks() 69 } 70 71 if len(plan.TargetAddrs) > 0 { 72 diags = diags.Append(tfdiags.Sourceless( 73 tfdiags.Warning, 74 "Applied changes may be incomplete", 75 `The plan was created with the -target option in effect, so some changes requested in the configuration may have been ignored and the output values may not be fully updated. Run the following command to verify that no other changes are pending: 76 terraform plan 77 78 Note that the -target option is not suitable for routine use, and is provided only for exceptional situations such as recovering from errors or mistakes, or when Terraform specifically suggests to use it as part of an error message.`, 79 )) 80 } 81 82 return newState, diags 83 } 84 85 func (c *Context) applyGraph(plan *plans.Plan, config *configs.Config, validate bool) (*Graph, walkOperation, tfdiags.Diagnostics) { 86 graph, diags := (&ApplyGraphBuilder{ 87 Config: config, 88 Changes: plan.Changes, 89 State: plan.PriorState, 90 Plugins: c.plugins, 91 Targets: plan.TargetAddrs, 92 ForceReplace: plan.ForceReplaceAddrs, 93 Validate: validate, 94 }).Build(addrs.RootModuleInstance) 95 96 operation := walkApply 97 if plan.UIMode == plans.DestroyMode { 98 // NOTE: This is a vestigial violation of the rule that we mustn't 99 // use plan.UIMode to affect apply-time behavior. It's a design error 100 // if anything downstream switches behavior when operation is set 101 // to walkDestroy, but we've not yet fully audited that. 102 // TODO: Audit that and remove walkDestroy as an operation mode. 103 operation = walkDestroy 104 } 105 106 return graph, operation, diags 107 } 108 109 // ApplyGraphForUI is a last vestage of graphs in the public interface of 110 // Context (as opposed to graphs as an implementation detail) intended only for 111 // use by the "terraform graph" command when asked to render an apply-time 112 // graph. 113 // 114 // The result of this is intended only for rendering ot the user as a dot 115 // graph, and so may change in future in order to make the result more useful 116 // in that context, even if drifts away from the physical graph that Terraform 117 // Core currently uses as an implementation detail of planning. 118 func (c *Context) ApplyGraphForUI(plan *plans.Plan, config *configs.Config) (*Graph, tfdiags.Diagnostics) { 119 // For now though, this really is just the internal graph, confusing 120 // implementation details and all. 121 122 var diags tfdiags.Diagnostics 123 124 graph, _, moreDiags := c.applyGraph(plan, config, false) 125 diags = diags.Append(moreDiags) 126 return graph, diags 127 }