135 lines
4.6 KiB
Go
135 lines
4.6 KiB
Go
package terraform
|
|
|
|
import (
|
|
"context"
|
|
"sync"
|
|
|
|
"github.com/zclconf/go-cty/cty"
|
|
|
|
"github.com/hashicorp/terraform/internal/addrs"
|
|
"github.com/hashicorp/terraform/internal/configs"
|
|
"github.com/hashicorp/terraform/internal/configs/configschema"
|
|
"github.com/hashicorp/terraform/internal/instances"
|
|
"github.com/hashicorp/terraform/internal/plans"
|
|
"github.com/hashicorp/terraform/internal/providers"
|
|
"github.com/hashicorp/terraform/internal/provisioners"
|
|
"github.com/hashicorp/terraform/internal/refactoring"
|
|
"github.com/hashicorp/terraform/internal/states"
|
|
"github.com/hashicorp/terraform/internal/tfdiags"
|
|
)
|
|
|
|
// ContextGraphWalker is the GraphWalker implementation used with the
|
|
// Context struct to walk and evaluate the graph.
|
|
type ContextGraphWalker struct {
|
|
NullGraphWalker
|
|
|
|
// Configurable values
|
|
Context *Context
|
|
State *states.SyncState // Used for safe concurrent access to state
|
|
RefreshState *states.SyncState // Used for safe concurrent access to state
|
|
PrevRunState *states.SyncState // Used for safe concurrent access to state
|
|
Changes *plans.ChangesSync // Used for safe concurrent writes to changes
|
|
InstanceExpander *instances.Expander // Tracks our gradual expansion of module and resource instances
|
|
MoveResults refactoring.MoveResults // Read-only record of earlier processing of move statements
|
|
Operation walkOperation
|
|
StopContext context.Context
|
|
RootVariableValues InputValues
|
|
Config *configs.Config
|
|
|
|
// This is an output. Do not set this, nor read it while a graph walk
|
|
// is in progress.
|
|
NonFatalDiagnostics tfdiags.Diagnostics
|
|
|
|
once sync.Once
|
|
contexts map[string]*BuiltinEvalContext
|
|
contextLock sync.Mutex
|
|
variableValues map[string]map[string]cty.Value
|
|
variableValuesLock sync.Mutex
|
|
providerCache map[string]providers.Interface
|
|
providerSchemas map[string]*ProviderSchema
|
|
providerLock sync.Mutex
|
|
provisionerCache map[string]provisioners.Interface
|
|
provisionerSchemas map[string]*configschema.Block
|
|
provisionerLock sync.Mutex
|
|
}
|
|
|
|
func (w *ContextGraphWalker) EnterPath(path addrs.ModuleInstance) EvalContext {
|
|
w.contextLock.Lock()
|
|
defer w.contextLock.Unlock()
|
|
|
|
// If we already have a context for this path cached, use that
|
|
key := path.String()
|
|
if ctx, ok := w.contexts[key]; ok {
|
|
return ctx
|
|
}
|
|
|
|
ctx := w.EvalContext().WithPath(path)
|
|
w.contexts[key] = ctx.(*BuiltinEvalContext)
|
|
return ctx
|
|
}
|
|
|
|
func (w *ContextGraphWalker) EvalContext() EvalContext {
|
|
w.once.Do(w.init)
|
|
|
|
// Our evaluator shares some locks with the main context and the walker
|
|
// so that we can safely run multiple evaluations at once across
|
|
// different modules.
|
|
evaluator := &Evaluator{
|
|
Meta: w.Context.meta,
|
|
Config: w.Config,
|
|
Operation: w.Operation,
|
|
State: w.State,
|
|
Changes: w.Changes,
|
|
Plugins: w.Context.plugins,
|
|
VariableValues: w.variableValues,
|
|
VariableValuesLock: &w.variableValuesLock,
|
|
}
|
|
|
|
ctx := &BuiltinEvalContext{
|
|
StopContext: w.StopContext,
|
|
Hooks: w.Context.hooks,
|
|
InputValue: w.Context.uiInput,
|
|
InstanceExpanderValue: w.InstanceExpander,
|
|
Plugins: w.Context.plugins,
|
|
MoveResultsValue: w.MoveResults,
|
|
ProviderCache: w.providerCache,
|
|
ProviderInputConfig: w.Context.providerInputConfig,
|
|
ProviderLock: &w.providerLock,
|
|
ProvisionerCache: w.provisionerCache,
|
|
ProvisionerLock: &w.provisionerLock,
|
|
ChangesValue: w.Changes,
|
|
StateValue: w.State,
|
|
RefreshStateValue: w.RefreshState,
|
|
PrevRunStateValue: w.PrevRunState,
|
|
Evaluator: evaluator,
|
|
VariableValues: w.variableValues,
|
|
VariableValuesLock: &w.variableValuesLock,
|
|
}
|
|
|
|
return ctx
|
|
}
|
|
|
|
func (w *ContextGraphWalker) init() {
|
|
w.contexts = make(map[string]*BuiltinEvalContext)
|
|
w.providerCache = make(map[string]providers.Interface)
|
|
w.providerSchemas = make(map[string]*ProviderSchema)
|
|
w.provisionerCache = make(map[string]provisioners.Interface)
|
|
w.provisionerSchemas = make(map[string]*configschema.Block)
|
|
w.variableValues = make(map[string]map[string]cty.Value)
|
|
|
|
// Populate root module variable values. Other modules will be populated
|
|
// during the graph walk.
|
|
w.variableValues[""] = make(map[string]cty.Value)
|
|
for k, iv := range w.RootVariableValues {
|
|
w.variableValues[""][k] = iv.Value
|
|
}
|
|
}
|
|
|
|
func (w *ContextGraphWalker) Execute(ctx EvalContext, n GraphNodeExecutable) tfdiags.Diagnostics {
|
|
// Acquire a lock on the semaphore
|
|
w.Context.parallelSem.Acquire()
|
|
defer w.Context.parallelSem.Release()
|
|
|
|
return n.Execute(ctx, w.Operation)
|
|
}
|