package configupgrade import ( "bytes" "fmt" "log" "strconv" "strings" hcl2 "github.com/hashicorp/hcl2/hcl" hcl2syntax "github.com/hashicorp/hcl2/hcl/hclsyntax" "github.com/zclconf/go-cty/cty" hcl1ast "github.com/hashicorp/hcl/hcl/ast" hcl1printer "github.com/hashicorp/hcl/hcl/printer" hcl1token "github.com/hashicorp/hcl/hcl/token" "github.com/hashicorp/hil" hilast "github.com/hashicorp/hil/ast" "github.com/hashicorp/terraform/addrs" "github.com/hashicorp/terraform/configs/configschema" "github.com/hashicorp/terraform/tfdiags" ) func upgradeExpr(val interface{}, filename string, interp bool, an *analysis) ([]byte, tfdiags.Diagnostics) { var buf bytes.Buffer var diags tfdiags.Diagnostics // "val" here can be either a hcl1ast.Node or a hilast.Node, since both // of these correspond to expressions in HCL2. Therefore we need to // comprehensively handle every possible HCL1 *and* HIL AST node type // and, at minimum, print it out as-is in HCL2 syntax. Value: switch tv := val.(type) { case *hcl1ast.LiteralType: return upgradeExpr(tv.Token, filename, interp, an) case hcl1token.Token: litVal := tv.Value() switch tv.Type { case hcl1token.STRING: if !interp { // Easy case, then. printQuotedString(&buf, litVal.(string)) break } hilNode, err := hil.Parse(litVal.(string)) if err != nil { diags = diags.Append(&hcl2.Diagnostic{ Severity: hcl2.DiagError, Summary: "Invalid interpolated string", Detail: fmt.Sprintf("Interpolation parsing failed: %s", err), Subject: hcl1PosRange(filename, tv.Pos).Ptr(), }) return nil, diags } interpSrc, interpDiags := upgradeExpr(hilNode, filename, interp, an) buf.Write(interpSrc) diags = diags.Append(interpDiags) case hcl1token.HEREDOC: // HCL1's "Value" method for tokens pulls out the body and removes // any indents in the source for a flush heredoc, which throws away // information we need to upgrade. Therefore we're going to // re-implement a subset of that logic here where we want to retain // the whitespace verbatim even in flush mode. firstNewlineIdx := strings.IndexByte(tv.Text, '\n') if firstNewlineIdx < 0 { // Should never happen, because tv.Value would already have // panicked above in this case. panic("heredoc doesn't contain newline") } introducer := tv.Text[:firstNewlineIdx+1] marker := introducer[2:] // trim off << prefix if marker[0] == '-' { marker = marker[1:] // also trim of - prefix for flush heredoc } body := tv.Text[len(introducer) : len(tv.Text)-len(marker)] flush := introducer[2] == '-' if flush { // HCL1 treats flush heredocs differently, trimming off any // spare whitespace that might appear after the trailing // newline, and so we must replicate that here to avoid // introducing additional whitespace in the output. body = strings.TrimRight(body, " \t") } // Now we have: // - introducer is the first line, like "<<-FOO\n" // - marker is the end marker, like "FOO\n" // - body is the raw data between the introducer and the marker, // which we need to do recursive upgrading for. buf.WriteString(introducer) if !interp { // Easy case: escape all interpolation-looking sequences. printHeredocLiteralFromHILOutput(&buf, body) } else { hilNode, err := hil.Parse(body) if err != nil { diags = diags.Append(&hcl2.Diagnostic{ Severity: hcl2.DiagError, Summary: "Invalid interpolated string", Detail: fmt.Sprintf("Interpolation parsing failed: %s", err), Subject: hcl1PosRange(filename, tv.Pos).Ptr(), }) } if hilNode != nil { if _, ok := hilNode.(*hilast.Output); !ok { // hil.Parse usually produces an output, but it can sometimes // produce an isolated expression if the input is entirely // a single interpolation. if hilNode != nil { hilNode = &hilast.Output{ Exprs: []hilast.Node{hilNode}, Posx: hilNode.Pos(), } } } interpDiags := upgradeHeredocBody(&buf, hilNode.(*hilast.Output), filename, an) diags = diags.Append(interpDiags) } } if !strings.HasSuffix(body, "\n") { // The versions of HCL1 vendored into Terraform <=0.11 // incorrectly allowed the end marker to appear at the end of // the final line of the body, rather than on a line of its own. // That is no longer valid in HCL2, so we need to fix it up. buf.WriteByte('\n') } // NOTE: Marker intentionally contains an extra newline here because // we need to ensure that any follow-on expression bits end up on // a separate line, or else the HCL2 parser won't be able to // recognize the heredoc marker. This causes an extra empty line // in some cases, which we accept for simplicity's sake. buf.WriteString(marker) case hcl1token.BOOL: if litVal.(bool) { buf.WriteString("true") } else { buf.WriteString("false") } case hcl1token.NUMBER: num := tv.Value() buf.WriteString(strconv.FormatInt(num.(int64), 10)) case hcl1token.FLOAT: num := tv.Value() buf.WriteString(strconv.FormatFloat(num.(float64), 'f', -1, 64)) default: // For everything else we'll just pass through the given bytes verbatim, // but we should't get here because the above is intended to be exhaustive. buf.WriteString(tv.Text) } case *hcl1ast.ListType: multiline := tv.Lbrack.Line != tv.Rbrack.Line buf.WriteString("[") if multiline { buf.WriteString("\n") } for i, node := range tv.List { src, moreDiags := upgradeExpr(node, filename, interp, an) diags = diags.Append(moreDiags) buf.Write(src) if lit, ok := node.(*hcl1ast.LiteralType); ok && lit.LineComment != nil { for _, comment := range lit.LineComment.List { buf.WriteString(", " + comment.Text) buf.WriteString("\n") } } else { if multiline { buf.WriteString(",\n") } else if i < len(tv.List)-1 { buf.WriteString(", ") } } } buf.WriteString("]") case *hcl1ast.ObjectType: if len(tv.List.Items) == 0 { buf.WriteString("{}") break } buf.WriteString("{\n") for _, item := range tv.List.Items { if len(item.Keys) != 1 { diags = diags.Append(&hcl2.Diagnostic{ Severity: hcl2.DiagError, Summary: "Invalid map element", Detail: "A map element may not have any block-style labels.", Subject: hcl1PosRange(filename, item.Pos()).Ptr(), }) continue } keySrc, moreDiags := upgradeExpr(item.Keys[0].Token, filename, interp, an) diags = diags.Append(moreDiags) valueSrc, moreDiags := upgradeExpr(item.Val, filename, interp, an) diags = diags.Append(moreDiags) if item.LeadComment != nil { for _, c := range item.LeadComment.List { buf.WriteString(c.Text) buf.WriteByte('\n') } } buf.Write(keySrc) buf.WriteString(" = ") buf.Write(valueSrc) if item.LineComment != nil { for _, c := range item.LineComment.List { buf.WriteByte(' ') buf.WriteString(c.Text) } } buf.WriteString("\n") } buf.WriteString("}") case hcl1ast.Node: // If our more-specific cases above didn't match this then we'll // ask the hcl1printer package to print the expression out // itself, and assume it'll still be valid in HCL2. // (We should rarely end up here, since our cases above should // be comprehensive.) log.Printf("[TRACE] configupgrade: Don't know how to upgrade %T as expression, so just passing it through as-is", tv) hcl1printer.Fprint(&buf, tv) case *hilast.LiteralNode: switch tl := tv.Value.(type) { case string: // This shouldn't generally happen because literal strings are // always wrapped in hilast.Output in HIL, but we'll allow it anyway. printQuotedString(&buf, tl) case int: buf.WriteString(strconv.Itoa(tl)) case float64: buf.WriteString(strconv.FormatFloat(tl, 'f', -1, 64)) case bool: if tl { buf.WriteString("true") } else { buf.WriteString("false") } } case *hilast.VariableAccess: // In HIL a variable access is just a single string which might contain // a mixture of identifiers, dots, integer indices, and splat expressions. // All of these concepts were formerly interpreted by Terraform itself, // rather than by HIL. We're going to process this one chunk at a time // here so we can normalize and introduce some newer syntax where it's // safe to do so. parts := strings.Split(tv.Name, ".") transformed := transformCountPseudoAttribute(&buf, parts, an) if transformed { break Value } parts = upgradeTraversalParts(parts, an) // might add/remove/change parts vDiags := validateHilAddress(tv.Name, filename) if len(vDiags) > 0 { diags = diags.Append(vDiags) break } printHilTraversalPartsAsHcl2(&buf, parts) case *hilast.Arithmetic: op, exists := hilArithmeticOpSyms[tv.Op] if !exists { panic(fmt.Errorf("arithmetic node with unsupported operator %#v", tv.Op)) } lhsExpr := tv.Exprs[0] rhsExpr := tv.Exprs[1] lhsSrc, exprDiags := upgradeExpr(lhsExpr, filename, true, an) diags = diags.Append(exprDiags) rhsSrc, exprDiags := upgradeExpr(rhsExpr, filename, true, an) diags = diags.Append(exprDiags) // HIL's AST represents -foo as (0 - foo), so we'll recognize // that here and normalize it back. if tv.Op == hilast.ArithmeticOpSub && len(lhsSrc) == 1 && lhsSrc[0] == '0' { buf.WriteString("-") buf.Write(rhsSrc) break } buf.Write(lhsSrc) buf.WriteString(op) buf.Write(rhsSrc) case *hilast.Call: name := tv.Func args := tv.Args // Some adaptations must happen prior to upgrading the arguments, // because they depend on the original argument AST nodes. switch name { case "base64sha256", "base64sha512", "md5", "sha1", "sha256", "sha512": // These functions were sometimes used in conjunction with the // file() function to take the hash of the contents of a file. // Prior to Terraform 0.11 there was a chance of silent corruption // of strings containing non-UTF8 byte sequences, and so we have // made it illegal to use file() with non-text files in 0.12 even // though in this _particular_ situation (passing the function // result directly to another function) there would not be any // corruption; the general rule keeps things consistent. // However, to still meet those use-cases we now have variants of // the hashing functions that have a "file" prefix on their names // and read the contents of a given file, rather than hashing // directly the given string. if len(args) > 0 { if subCall, ok := args[0].(*hilast.Call); ok && subCall.Func == "file" { // We're going to flatten this down into a single call, so // we actually want the arguments of the sub-call here. name = "file" + name args = subCall.Args // For this one, we'll fall through to the normal upgrade // handling now that we've fixed up the name and args... } } } argExprs := make([][]byte, len(args)) multiline := false totalLen := 0 for i, arg := range args { if i > 0 { totalLen += 2 } exprSrc, exprDiags := upgradeExpr(arg, filename, true, an) diags = diags.Append(exprDiags) argExprs[i] = exprSrc if bytes.Contains(exprSrc, []byte{'\n'}) { // If any of our arguments are multi-line then we'll also be multiline multiline = true } totalLen += len(exprSrc) } if totalLen > 60 { // heuristic, since we don't know here how indented we are already multiline = true } // Some functions are now better expressed as native language constructs. // These cases will return early if they emit anything, or otherwise // fall through to the default emitter. switch name { case "list": // Should now use tuple constructor syntax buf.WriteByte('[') if multiline { buf.WriteByte('\n') } for i, exprSrc := range argExprs { buf.Write(exprSrc) if multiline { buf.WriteString(",\n") } else { if i < len(args)-1 { buf.WriteString(", ") } } } buf.WriteByte(']') break Value case "map": // Should now use object constructor syntax, but we can only // achieve that if the call is valid, which requires an even // number of arguments. if len(argExprs) == 0 { buf.WriteString("{}") break Value } else if len(argExprs)%2 == 0 { buf.WriteString("{\n") for i := 0; i < len(argExprs); i += 2 { k := argExprs[i] v := argExprs[i+1] buf.Write(k) buf.WriteString(" = ") buf.Write(v) buf.WriteByte('\n') } buf.WriteByte('}') break Value } case "lookup": // A lookup call with only two arguments is equivalent to native // index syntax. (A third argument would specify a default value, // so calls like that must be left alone.) // (Note that we can't safely do this for element(...) because // the user may be relying on its wraparound behavior.) if len(argExprs) == 2 { buf.Write(argExprs[0]) buf.WriteByte('[') buf.Write(argExprs[1]) buf.WriteByte(']') break Value } case "element": // We cannot replace element with index syntax safely in general // because users may be relying on its special modulo wraparound // behavior that the index syntax doesn't do. However, if it seems // like the user is trying to use element with a set, we'll insert // an explicit conversion to list to mimic the implicit conversion // that we used to do as an unintended side-effect of how functions // work in HIL. if len(argExprs) > 0 { argTy := an.InferExpressionType(argExprs[0], nil) if argTy.IsSetType() { newExpr := []byte(`tolist(`) newExpr = append(newExpr, argExprs[0]...) newExpr = append(newExpr, ')') argExprs[0] = newExpr } } // HIL used some undocumented special functions to implement certain // operations, but since those were actually callable in real expressions // some users inevitably depended on them, so we'll fix them up here. // These each become two function calls to preserve the old behavior // of implicitly converting to the source type first. Usage of these // is relatively rare, so the result doesn't need to be too pretty. case "__builtin_BoolToString": buf.WriteString("tostring(tobool(") buf.Write(argExprs[0]) buf.WriteString("))") break Value case "__builtin_FloatToString": buf.WriteString("tostring(tonumber(") buf.Write(argExprs[0]) buf.WriteString("))") break Value case "__builtin_IntToString": buf.WriteString("tostring(floor(") buf.Write(argExprs[0]) buf.WriteString("))") break Value case "__builtin_StringToInt": buf.WriteString("floor(tostring(") buf.Write(argExprs[0]) buf.WriteString("))") break Value case "__builtin_StringToFloat": buf.WriteString("tonumber(tostring(") buf.Write(argExprs[0]) buf.WriteString("))") break Value case "__builtin_StringToBool": buf.WriteString("tobool(tostring(") buf.Write(argExprs[0]) buf.WriteString("))") break Value case "__builtin_FloatToInt", "__builtin_IntToFloat": // Since "floor" already has an implicit conversion of its argument // to number, and the result is a whole number in either case, // these ones are easier. (We no longer distinguish int and float // as types in HCL2, even though HIL did.) name = "floor" } buf.WriteString(name) buf.WriteByte('(') if multiline { buf.WriteByte('\n') } for i, exprSrc := range argExprs { buf.Write(exprSrc) if multiline { buf.WriteString(",\n") } else { if i < len(args)-1 { buf.WriteString(", ") } } } buf.WriteByte(')') case *hilast.Conditional: condSrc, exprDiags := upgradeExpr(tv.CondExpr, filename, true, an) diags = diags.Append(exprDiags) trueSrc, exprDiags := upgradeExpr(tv.TrueExpr, filename, true, an) diags = diags.Append(exprDiags) falseSrc, exprDiags := upgradeExpr(tv.FalseExpr, filename, true, an) diags = diags.Append(exprDiags) buf.Write(condSrc) buf.WriteString(" ? ") buf.Write(trueSrc) buf.WriteString(" : ") buf.Write(falseSrc) case *hilast.Index: target, ok := tv.Target.(*hilast.VariableAccess) if !ok { panic(fmt.Sprintf("Index node with unsupported target type (%T)", tv.Target)) } parts := strings.Split(target.Name, ".") keySrc, exprDiags := upgradeExpr(tv.Key, filename, true, an) diags = diags.Append(exprDiags) transformed := transformCountPseudoAttribute(&buf, parts, an) if transformed { break Value } parts = upgradeTraversalParts(parts, an) // might add/remove/change parts vDiags := validateHilAddress(target.Name, filename) if len(vDiags) > 0 { diags = diags.Append(vDiags) break } first, remain := parts[0], parts[1:] var rAddr addrs.Resource switch parts[0] { case "data": if len(parts) == 5 && parts[3] == "*" { rAddr.Mode = addrs.DataResourceMode rAddr.Type = parts[1] rAddr.Name = parts[2] } default: if len(parts) == 4 && parts[2] == "*" { rAddr.Mode = addrs.ManagedResourceMode rAddr.Type = parts[0] rAddr.Name = parts[1] } } // We need to check if the thing being referenced has count // to retain backward compatibility hasCount := false if v, exists := an.ResourceHasCount[rAddr]; exists { hasCount = v } hasSplat := false buf.WriteString(first) for _, part := range remain { // Attempt to convert old-style splat indexing to new one // e.g. res.label.*.attr[idx] to res.label[idx].attr if part == "*" && hasCount { hasSplat = true buf.WriteString(fmt.Sprintf("[%s]", keySrc)) continue } buf.WriteByte('.') buf.WriteString(part) } if !hasSplat { buf.WriteString("[") buf.Write(keySrc) buf.WriteString("]") } case *hilast.Output: if len(tv.Exprs) == 1 { item := tv.Exprs[0] naked := true if lit, ok := item.(*hilast.LiteralNode); ok { if _, ok := lit.Value.(string); ok { naked = false } } if naked { // If there's only one expression and it isn't a literal string // then we'll just output it naked, since wrapping a single // expression in interpolation is no longer idiomatic. interped, interpDiags := upgradeExpr(item, filename, true, an) diags = diags.Append(interpDiags) buf.Write(interped) break } } buf.WriteString(`"`) for _, item := range tv.Exprs { if lit, ok := item.(*hilast.LiteralNode); ok { if litStr, ok := lit.Value.(string); ok { printStringLiteralFromHILOutput(&buf, litStr) continue } } interped, interpDiags := upgradeExpr(item, filename, true, an) diags = diags.Append(interpDiags) buf.WriteString("${") buf.Write(interped) buf.WriteString("}") } buf.WriteString(`"`) case hilast.Node: // Nothing reasonable we can do here, so we should've handled all of // the possibilities above. panic(fmt.Errorf("upgradeExpr doesn't handle HIL node type %T", tv)) default: // If we end up in here then the caller gave us something completely invalid. panic(fmt.Errorf("upgradeExpr on unsupported type %T", val)) } return buf.Bytes(), diags } func validateHilAddress(address, filename string) tfdiags.Diagnostics { parts := strings.Split(address, ".") var diags tfdiags.Diagnostics label, ok := getResourceLabel(parts) if ok && !hcl2syntax.ValidIdentifier(label) { // We can't get any useful source location out of HIL unfortunately diags = diags.Append(tfdiags.Sourceless( tfdiags.Error, fmt.Sprintf("Invalid address (%s) in ./%s", address, filename), // The label could be invalid for another reason // but this is the most likely, so we add it as hint "Names of objects (resources, modules, etc) may no longer start with digits.")) } return diags } func getResourceLabel(parts []string) (string, bool) { if len(parts) < 1 { return "", false } if parts[0] == "data" { if len(parts) < 3 { return "", false } return parts[2], true } if len(parts) < 2 { return "", false } return parts[1], true } // transformCountPseudoAttribute deals with the .count pseudo-attributes // that 0.11 and prior allowed for resources. These no longer exist, // because they don't do anything we can't do with the length(...) function. func transformCountPseudoAttribute(buf *bytes.Buffer, parts []string, an *analysis) (transformed bool) { if len(parts) > 0 { var rAddr addrs.Resource switch parts[0] { case "data": if len(parts) == 4 && parts[3] == "count" { rAddr.Mode = addrs.DataResourceMode rAddr.Type = parts[1] rAddr.Name = parts[2] } default: if len(parts) == 3 && parts[2] == "count" { rAddr.Mode = addrs.ManagedResourceMode rAddr.Type = parts[0] rAddr.Name = parts[1] } } // We need to check if the thing being referenced is actually an // existing resource, because other three-part traversals might // coincidentally end with "count". if hasCount, exists := an.ResourceHasCount[rAddr]; exists { if hasCount { buf.WriteString("length(") buf.WriteString(rAddr.String()) buf.WriteString(")") } else { // If the resource does not have count, the .count // attr would've always returned 1 before. buf.WriteString("1") } transformed = true return } } return } func printHilTraversalPartsAsHcl2(buf *bytes.Buffer, parts []string) { first, remain := parts[0], parts[1:] buf.WriteString(first) seenSplat := false for _, part := range remain { if part == "*" { seenSplat = true buf.WriteString(".*") continue } // Other special cases apply only if we've not previously // seen a splat expression marker, since attribute vs. index // syntax have different interpretations after a simple splat. if !seenSplat { if v, err := strconv.Atoi(part); err == nil { // Looks like it's old-style index traversal syntax foo.0.bar // so we'll replace with canonical index syntax foo[0].bar. fmt.Fprintf(buf, "[%d]", v) continue } if !hcl2syntax.ValidIdentifier(part) { // This should be rare since HIL's identifier syntax is _close_ // to HCL2's, but we'll get here if one of the intervening // parts is not a valid identifier in isolation, since HIL // did not consider these to be separate identifiers. // e.g. foo.1bar would be invalid in HCL2; must instead be foo["1bar"]. buf.WriteByte('[') printQuotedString(buf, part) buf.WriteByte(']') continue } } buf.WriteByte('.') buf.WriteString(part) } } func upgradeHeredocBody(buf *bytes.Buffer, val *hilast.Output, filename string, an *analysis) tfdiags.Diagnostics { var diags tfdiags.Diagnostics for _, item := range val.Exprs { if lit, ok := item.(*hilast.LiteralNode); ok { if litStr, ok := lit.Value.(string); ok { printHeredocLiteralFromHILOutput(buf, litStr) continue } } interped, interpDiags := upgradeExpr(item, filename, true, an) diags = diags.Append(interpDiags) buf.WriteString("${") buf.Write(interped) buf.WriteString("}") } return diags } func upgradeTraversalExpr(val interface{}, filename string, an *analysis) ([]byte, tfdiags.Diagnostics) { if lit, ok := val.(*hcl1ast.LiteralType); ok && lit.Token.Type == hcl1token.STRING { trStr := lit.Token.Value().(string) if strings.HasSuffix(trStr, ".%") || strings.HasSuffix(trStr, ".#") { // Terraform 0.11 would often not validate traversals given in // strings and so users would get away with this sort of // flatmap-implementation-detail reference, particularly inside // ignore_changes. We'll just trim these off to tolerate it, // rather than failing below in ParseTraversalAbs. trStr = trStr[:len(trStr)-2] } trSrc := []byte(trStr) _, trDiags := hcl2syntax.ParseTraversalAbs(trSrc, "", hcl2.Pos{}) if !trDiags.HasErrors() { return trSrc, nil } } return upgradeExpr(val, filename, false, an) } var hilArithmeticOpSyms = map[hilast.ArithmeticOp]string{ hilast.ArithmeticOpAdd: " + ", hilast.ArithmeticOpSub: " - ", hilast.ArithmeticOpMul: " * ", hilast.ArithmeticOpDiv: " / ", hilast.ArithmeticOpMod: " % ", hilast.ArithmeticOpLogicalAnd: " && ", hilast.ArithmeticOpLogicalOr: " || ", hilast.ArithmeticOpEqual: " == ", hilast.ArithmeticOpNotEqual: " != ", hilast.ArithmeticOpLessThan: " < ", hilast.ArithmeticOpLessThanOrEqual: " <= ", hilast.ArithmeticOpGreaterThan: " > ", hilast.ArithmeticOpGreaterThanOrEqual: " >= ", } // upgradeTraversalParts might alter the given split parts from a HIL-style // variable access to account for renamings made in Terraform v0.12. func upgradeTraversalParts(parts []string, an *analysis) []string { parts = upgradeCountTraversalParts(parts, an) parts = upgradeTerraformRemoteStateTraversalParts(parts, an) return parts } func upgradeCountTraversalParts(parts []string, an *analysis) []string { // test_instance.foo.id needs to become test_instance.foo[0].id if // count is set for test_instance.foo. Likewise, if count _isn't_ set // then test_instance.foo.0.id must become test_instance.foo.id. if len(parts) < 3 { return parts } var addr addrs.Resource var idxIdx int switch parts[0] { case "data": addr.Mode = addrs.DataResourceMode addr.Type = parts[1] addr.Name = parts[2] idxIdx = 3 default: addr.Mode = addrs.ManagedResourceMode addr.Type = parts[0] addr.Name = parts[1] idxIdx = 2 } hasCount, exists := an.ResourceHasCount[addr] if !exists { // Probably not actually a resource instance at all, then. return parts } // Since at least one attribute is required after a resource reference // prior to Terraform v0.12, we can assume there will be at least enough // parts to contain the index even if no index is actually present. if idxIdx >= len(parts) { return parts } maybeIdx := parts[idxIdx] switch { case hasCount: if _, err := strconv.Atoi(maybeIdx); err == nil || maybeIdx == "*" { // Has an index already, so no changes required. return parts } // Need to insert index zero at idxIdx. log.Printf("[TRACE] configupgrade: %s has count but reference does not have index, so adding one", addr) newParts := make([]string, len(parts)+1) copy(newParts, parts[:idxIdx]) newParts[idxIdx] = "0" copy(newParts[idxIdx+1:], parts[idxIdx:]) return newParts default: // For removing indexes we'll be more conservative and only remove // exactly index "0", because other indexes on a resource without // count are invalid anyway and we're better off letting the normal // configuration parser deal with that. if maybeIdx != "0" { return parts } // Need to remove the index zero. log.Printf("[TRACE] configupgrade: %s does not have count but reference has index, so removing it", addr) newParts := make([]string, len(parts)-1) copy(newParts, parts[:idxIdx]) copy(newParts[idxIdx:], parts[idxIdx+1:]) return newParts } } func upgradeTerraformRemoteStateTraversalParts(parts []string, an *analysis) []string { // data.terraform_remote_state.x.foo needs to become // data.terraform_remote_state.x.outputs.foo unless "foo" is a real // attribute in the object type implied by the remote state schema. if len(parts) < 4 { return parts } if parts[0] != "data" || parts[1] != "terraform_remote_state" { return parts } attrIdx := 3 if parts[attrIdx] == "*" { attrIdx = 4 // data.terraform_remote_state.x.*.foo } else if _, err := strconv.Atoi(parts[attrIdx]); err == nil { attrIdx = 4 // data.terraform_remote_state.x.1.foo } if attrIdx >= len(parts) { return parts } attrName := parts[attrIdx] // Now we'll use the schema of data.terraform_remote_state to decide if // the user intended this to be an output, or whether it's one of the real // attributes of this data source. var schema *configschema.Block if providerSchema := an.ProviderSchemas["terraform"]; providerSchema != nil { schema, _ = providerSchema.SchemaForResourceType(addrs.DataResourceMode, "terraform_remote_state") } // Schema should be available in all reasonable cases, but might be nil // if input configuration contains a reference to a remote state data resource // without actually defining that data resource. In that weird edge case, // we'll just assume all attributes are outputs. if schema != nil && schema.ImpliedType().HasAttribute(attrName) { // User is accessing one of the real attributes, then, and we have // no need to rewrite it. return parts } // If we get down here then our task is to produce a new parts slice // that has the fixed additional attribute name "outputs" inserted at // attrIdx, retaining all other parts. newParts := make([]string, len(parts)+1) copy(newParts, parts[:attrIdx]) newParts[attrIdx] = "outputs" copy(newParts[attrIdx+1:], parts[attrIdx:]) return newParts } func typeIsSettableFromTupleCons(ty cty.Type) bool { return ty.IsListType() || ty.IsTupleType() || ty.IsSetType() }