228 lines
7.3 KiB
Go
228 lines
7.3 KiB
Go
package configupgrade
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import (
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"fmt"
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"log"
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hcl1 "github.com/hashicorp/hcl"
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hcl1ast "github.com/hashicorp/hcl/hcl/ast"
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hcl1parser "github.com/hashicorp/hcl/hcl/parser"
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hcl1token "github.com/hashicorp/hcl/hcl/token"
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"github.com/hashicorp/terraform/addrs"
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"github.com/hashicorp/terraform/configs/configschema"
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"github.com/hashicorp/terraform/moduledeps"
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"github.com/hashicorp/terraform/plugin/discovery"
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"github.com/hashicorp/terraform/terraform"
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)
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// analysis is a container for the various different information gathered
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// by Upgrader.analyze.
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type analysis struct {
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ProviderSchemas map[string]*terraform.ProviderSchema
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ProvisionerSchemas map[string]*configschema.Block
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ResourceProviderType map[addrs.Resource]string
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ResourceHasCount map[addrs.Resource]bool
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}
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// analyze processes the configuration files included inside the receiver
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// and returns an assortment of information required to make decisions during
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// a configuration upgrade.
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func (u *Upgrader) analyze(ms ModuleSources) (*analysis, error) {
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ret := &analysis{
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ProviderSchemas: make(map[string]*terraform.ProviderSchema),
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ProvisionerSchemas: make(map[string]*configschema.Block),
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ResourceProviderType: make(map[addrs.Resource]string),
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ResourceHasCount: make(map[addrs.Resource]bool),
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}
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m := &moduledeps.Module{
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Providers: make(moduledeps.Providers),
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}
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// This is heavily based on terraform.ModuleTreeDependencies but
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// differs in that it works directly with the HCL1 AST rather than
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// the legacy config structs (and can thus outlive those) and that
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// it only works on one module at a time, and so doesn't need to
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// recurse into child calls.
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for name, src := range ms {
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if ext := fileExt(name); ext != ".tf" {
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continue
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}
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log.Printf("[TRACE] configupgrade: Analyzing %q", name)
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f, err := hcl1parser.Parse(src)
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if err != nil {
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// If we encounter a syntax error then we'll just skip for now
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// and assume that we'll catch this again when we do the upgrade.
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// If not, we'll break the upgrade step of renaming .tf files to
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// .tf.json if they seem to be JSON syntax.
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log.Printf("[ERROR] Failed to parse %q: %s", name, err)
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continue
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}
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list, ok := f.Node.(*hcl1ast.ObjectList)
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if !ok {
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return nil, fmt.Errorf("error parsing: file doesn't contain a root object")
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}
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if providersList := list.Filter("provider"); len(providersList.Items) > 0 {
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providerObjs := providersList.Children()
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for _, providerObj := range providerObjs.Items {
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if len(providerObj.Keys) != 1 {
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return nil, fmt.Errorf("provider block has wrong number of labels")
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}
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name := providerObj.Keys[0].Token.Value().(string)
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var listVal *hcl1ast.ObjectList
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if ot, ok := providerObj.Val.(*hcl1ast.ObjectType); ok {
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listVal = ot.List
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} else {
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return nil, fmt.Errorf("provider %q: must be a block", name)
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}
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var versionStr string
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if a := listVal.Filter("version"); len(a.Items) > 0 {
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err := hcl1.DecodeObject(&versionStr, a.Items[0].Val)
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if err != nil {
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return nil, fmt.Errorf("Error reading version for provider %q: %s", name, err)
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}
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}
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var constraints discovery.Constraints
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if versionStr != "" {
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constraints, err = discovery.ConstraintStr(versionStr).Parse()
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if err != nil {
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return nil, fmt.Errorf("Error parsing version for provider %q: %s", name, err)
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}
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}
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var alias string
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if a := listVal.Filter("alias"); len(a.Items) > 0 {
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err := hcl1.DecodeObject(&alias, a.Items[0].Val)
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if err != nil {
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return nil, fmt.Errorf("Error reading alias for provider %q: %s", name, err)
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}
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}
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inst := moduledeps.ProviderInstance(name)
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if alias != "" {
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inst = moduledeps.ProviderInstance(name + "." + alias)
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}
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log.Printf("[TRACE] Provider block requires provider %q", inst)
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m.Providers[inst] = moduledeps.ProviderDependency{
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Constraints: constraints,
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Reason: moduledeps.ProviderDependencyExplicit,
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}
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}
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}
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{
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resourceConfigsList := list.Filter("resource")
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dataResourceConfigsList := list.Filter("data")
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// list.Filter annoyingly strips off the key used for matching,
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// so we'll put it back here so we can distinguish our two types
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// of blocks below.
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for _, obj := range resourceConfigsList.Items {
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obj.Keys = append([]*hcl1ast.ObjectKey{
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{Token: hcl1token.Token{Type: hcl1token.IDENT, Text: "resource"}},
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}, obj.Keys...)
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}
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for _, obj := range dataResourceConfigsList.Items {
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obj.Keys = append([]*hcl1ast.ObjectKey{
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{Token: hcl1token.Token{Type: hcl1token.IDENT, Text: "data"}},
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}, obj.Keys...)
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}
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// Now we can merge the two lists together, since we can distinguish
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// them just by their keys[0].
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resourceConfigsList.Items = append(resourceConfigsList.Items, dataResourceConfigsList.Items...)
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resourceObjs := resourceConfigsList.Children()
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for _, resourceObj := range resourceObjs.Items {
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if len(resourceObj.Keys) != 3 {
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return nil, fmt.Errorf("resource or data block has wrong number of labels")
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}
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typeName := resourceObj.Keys[1].Token.Value().(string)
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name := resourceObj.Keys[2].Token.Value().(string)
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rAddr := addrs.Resource{
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Mode: addrs.ManagedResourceMode,
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Type: typeName,
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Name: name,
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}
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if resourceObj.Keys[0].Token.Value() == "data" {
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rAddr.Mode = addrs.DataResourceMode
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}
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var listVal *hcl1ast.ObjectList
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if ot, ok := resourceObj.Val.(*hcl1ast.ObjectType); ok {
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listVal = ot.List
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} else {
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return nil, fmt.Errorf("config for %q must be a block", rAddr)
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}
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if o := listVal.Filter("count"); len(o.Items) > 0 {
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ret.ResourceHasCount[rAddr] = true
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} else {
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ret.ResourceHasCount[rAddr] = false
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}
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var providerKey string
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if o := listVal.Filter("provider"); len(o.Items) > 0 {
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err := hcl1.DecodeObject(&providerKey, o.Items[0].Val)
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if err != nil {
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return nil, fmt.Errorf("Error reading provider for resource %s: %s", rAddr, err)
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}
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}
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if providerKey == "" {
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providerKey = rAddr.DefaultProviderConfig().StringCompact()
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}
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inst := moduledeps.ProviderInstance(providerKey)
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log.Printf("[TRACE] Resource block for %s requires provider %q", rAddr, inst)
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if _, exists := m.Providers[inst]; !exists {
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m.Providers[inst] = moduledeps.ProviderDependency{
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Reason: moduledeps.ProviderDependencyImplicit,
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}
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}
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ret.ResourceProviderType[rAddr] = inst.Type()
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}
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}
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}
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providerFactories, err := u.Providers.ResolveProviders(m.PluginRequirements())
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if err != nil {
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return nil, fmt.Errorf("error resolving providers: %s", err)
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}
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for name, fn := range providerFactories {
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log.Printf("[TRACE] Fetching schema from provider %q", name)
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provider, err := fn()
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if err != nil {
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return nil, fmt.Errorf("failed to load provider %q: %s", name, err)
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}
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resp := provider.GetSchema()
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if resp.Diagnostics.HasErrors() {
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return nil, resp.Diagnostics.Err()
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}
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schema := &terraform.ProviderSchema{
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Provider: resp.Provider.Block,
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ResourceTypes: map[string]*configschema.Block{},
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DataSources: map[string]*configschema.Block{},
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}
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for t, s := range resp.ResourceTypes {
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schema.ResourceTypes[t] = s.Block
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}
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for t, s := range resp.DataSources {
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schema.DataSources[t] = s.Block
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}
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ret.ProviderSchemas[name] = schema
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}
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// TODO: Also ProvisionerSchemas
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return ret, nil
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}
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