vendor: Add github.com/hashicorp/terraform-config-inspect

go.mod

@@ -71,12 +71,13 @@ require (
 	github.com/hashicorp/go-uuid v1.0.0
 	github.com/hashicorp/go-version v1.0.0
 	github.com/hashicorp/golang-lru v0.5.0 // indirect
-	github.com/hashicorp/hcl v0.0.0-20170504190234-a4b07c25de5f
+	github.com/hashicorp/hcl v1.0.0
 	github.com/hashicorp/hcl2 v0.0.0-20181220012050-6631d7cd0a68
 	github.com/hashicorp/hil v0.0.0-20170627220502-fa9f258a9250
 	github.com/hashicorp/logutils v0.0.0-20150609070431-0dc08b1671f3
 	github.com/hashicorp/memberlist v0.1.0 // indirect
 	github.com/hashicorp/serf v0.0.0-20160124182025-e4ec8cc423bb // indirect
+	github.com/hashicorp/terraform-config-inspect v0.0.0-20181213005350-314d8affa1db
 	github.com/hashicorp/vault v0.0.0-20161029210149-9a60bf2a50e4
 	github.com/jen20/awspolicyequivalence v0.0.0-20170831201602-3d48364a137a // indirect
 	github.com/jonboulle/clockwork v0.1.0 // indirect

go.sum

@@ -9,6 +9,7 @@ github.com/Azure/go-ntlmssp v0.0.0-20170803034930-c92175d54006 h1:dVyNL14dq1500J
 github.com/Azure/go-ntlmssp v0.0.0-20170803034930-c92175d54006/go.mod h1:chxPXzSsl7ZWRAuOIE23GDNzjWuZquvFlgA8xmpunjU=
 github.com/ChrisTrenkamp/goxpath v0.0.0-20170625215350-4fe035839290 h1:K9I21XUHNbYD3GNMmJBN0UKJCpdP+glftwNZ7Bo8kqY=
 github.com/ChrisTrenkamp/goxpath v0.0.0-20170625215350-4fe035839290/go.mod h1:nuWgzSkT5PnyOd+272uUmV0dnAnAn42Mk7PiQC5VzN4=
+github.com/DHowett/go-plist v0.0.0-20180609054337-500bd5b9081b/go.mod h1:5paT5ZDrOm8eAJPem2Bd+q3FTi3Gxm/U4tb2tH8YIUQ=
 github.com/Unknwon/com v0.0.0-20151008135407-28b053d5a292 h1:tuQ7w+my8a8mkwN7x2TSd7OzTjkZ7rAeSyH4xncuAMI=
 github.com/Unknwon/com v0.0.0-20151008135407-28b053d5a292/go.mod h1:KYCjqMOeHpNuTOiFQU6WEcTG7poCJrUs0YgyHNtn1no=
 github.com/abdullin/seq v0.0.0-20160510034733-d5467c17e7af h1:DBNMBMuMiWYu0b+8KMJuWmfCkcxl09JwdlqwDZZ6U14=
@@ -159,6 +160,8 @@ github.com/hashicorp/golang-lru v0.5.0 h1:CL2msUPvZTLb5O648aiLNJw3hnBxN2+1Jq8rCO
 github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
 github.com/hashicorp/hcl v0.0.0-20170504190234-a4b07c25de5f h1:UdxlrJz4JOnY8W+DbLISwf2B8WXEolNRA8BGCwI9jws=
 github.com/hashicorp/hcl v0.0.0-20170504190234-a4b07c25de5f/go.mod h1:oZtUIOe8dh44I2q6ScRibXws4Ajl+d+nod3AaR9vL5w=
+github.com/hashicorp/hcl v1.0.0 h1:0Anlzjpi4vEasTeNFn2mLJgTSwt0+6sfsiTG8qcWGx4=
+github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
 github.com/hashicorp/hcl2 v0.0.0-20181208003705-670926858200 h1:F/nGtDwtQsuw7ZHmiLpHsPWNljDC24kiSHSGUnou9sw=
 github.com/hashicorp/hcl2 v0.0.0-20181208003705-670926858200/go.mod h1:ShfpTh661oAaxo7VcNxg0zcZW6jvMa7Moy2oFx7e5dE=
 github.com/hashicorp/hcl2 v0.0.0-20181214224644-4c4fdbdcc016 h1:rWpgzURetj/et0J6RoRw1+CBaiyrAQamwNCuYrHayU0=
@@ -181,6 +184,8 @@ github.com/hashicorp/memberlist v0.1.0 h1:qSsCiC0WYD39lbSitKNt40e30uorm2Ss/d4JGU
 github.com/hashicorp/memberlist v0.1.0/go.mod h1:ncdBp14cuox2iFOq3kDiquKU6fqsTBc3W6JvZwjxxsE=
 github.com/hashicorp/serf v0.0.0-20160124182025-e4ec8cc423bb h1:ZbgmOQt8DOg796figP87/EFCVx2v2h9yRvwHF/zceX4=
 github.com/hashicorp/serf v0.0.0-20160124182025-e4ec8cc423bb/go.mod h1:h/Ru6tmZazX7WO/GDmwdpS975F019L4t5ng5IgwbNrE=
+github.com/hashicorp/terraform-config-inspect v0.0.0-20181213005350-314d8affa1db h1:AcZb6ClKGJoY9vDFvxw+t5s8EmtWP8fMerxP6j+veKc=
+github.com/hashicorp/terraform-config-inspect v0.0.0-20181213005350-314d8affa1db/go.mod h1:2zR/i7/tO81bLaVoMEJlSLRJ36/TvPLapEmy682Zizo=
 github.com/hashicorp/vault v0.0.0-20161029210149-9a60bf2a50e4 h1:SGDekHLK2IRoVS7Fb4olLyWvc2VmwKgyFC05j6X3NII=
 github.com/hashicorp/vault v0.0.0-20161029210149-9a60bf2a50e4/go.mod h1:KfSyffbKxoVyspOdlaGVjIuwLobi07qD1bAbosPMpP0=
 github.com/hashicorp/yamux v0.0.0-20180604194846-3520598351bb h1:b5rjCoWHc7eqmAS4/qyk21ZsHyb6Mxv/jykxvNTkU4M=

vendor/github.com/hashicorp/hcl/.travis.yml

@@ -3,7 +3,8 @@ sudo: false
 language: go
 
 go:
-  - 1.8
+  - 1.x
+  - tip
 
 branches:
   only:

vendor/github.com/hashicorp/hcl/decoder.go

@@ -89,7 +89,7 @@ func (d *decoder) decode(name string, node ast.Node, result reflect.Value) error
 	switch k.Kind() {
 	case reflect.Bool:
 		return d.decodeBool(name, node, result)
-	case reflect.Float64:
+	case reflect.Float32, reflect.Float64:
 		return d.decodeFloat(name, node, result)
 	case reflect.Int, reflect.Int32, reflect.Int64:
 		return d.decodeInt(name, node, result)
@@ -137,13 +137,13 @@ func (d *decoder) decodeBool(name string, node ast.Node, result reflect.Value) e
 func (d *decoder) decodeFloat(name string, node ast.Node, result reflect.Value) error {
 	switch n := node.(type) {
 	case *ast.LiteralType:
-		if n.Token.Type == token.FLOAT {
+		if n.Token.Type == token.FLOAT || n.Token.Type == token.NUMBER {
 			v, err := strconv.ParseFloat(n.Token.Text, 64)
 			if err != nil {
 				return err
 			}
 
-			result.Set(reflect.ValueOf(v))
+			result.Set(reflect.ValueOf(v).Convert(result.Type()))
 			return nil
 		}
 	}
@@ -573,7 +573,11 @@ func (d *decoder) decodeStruct(name string, node ast.Node, result reflect.Value)
 
 	// Compile the list of all the fields that we're going to be decoding
 	// from all the structs.
-	fields := make(map[*reflect.StructField]reflect.Value)
+	type field struct {
+		field reflect.StructField
+		val   reflect.Value
+	}
+	fields := []field{}
 	for len(structs) > 0 {
 		structVal := structs[0]
 		structs = structs[1:]
@@ -616,7 +620,7 @@ func (d *decoder) decodeStruct(name string, node ast.Node, result reflect.Value)
 			}
 
 			// Normal struct field, store it away
-			fields[&fieldType] = structVal.Field(i)
+			fields = append(fields, field{fieldType, structVal.Field(i)})
 		}
 	}
 
@@ -624,26 +628,27 @@ func (d *decoder) decodeStruct(name string, node ast.Node, result reflect.Value)
 	decodedFields := make([]string, 0, len(fields))
 	decodedFieldsVal := make([]reflect.Value, 0)
 	unusedKeysVal := make([]reflect.Value, 0)
-	for fieldType, field := range fields {
+	for _, f := range fields {
-		if !field.IsValid() {
+		field, fieldValue := f.field, f.val
+		if !fieldValue.IsValid() {
 			// This should never happen
 			panic("field is not valid")
 		}
 
 		// If we can't set the field, then it is unexported or something,
 		// and we just continue onwards.
-		if !field.CanSet() {
+		if !fieldValue.CanSet() {
 			continue
 		}
 
-		fieldName := fieldType.Name
+		fieldName := field.Name
 
-		tagValue := fieldType.Tag.Get(tagName)
+		tagValue := field.Tag.Get(tagName)
 		tagParts := strings.SplitN(tagValue, ",", 2)
 		if len(tagParts) >= 2 {
 			switch tagParts[1] {
 			case "decodedFields":
-				decodedFieldsVal = append(decodedFieldsVal, field)
+				decodedFieldsVal = append(decodedFieldsVal, fieldValue)
 				continue
 			case "key":
 				if item == nil {
@@ -654,10 +659,10 @@ func (d *decoder) decodeStruct(name string, node ast.Node, result reflect.Value)
 					}
 				}
 
-				field.SetString(item.Keys[0].Token.Value().(string))
+				fieldValue.SetString(item.Keys[0].Token.Value().(string))
 				continue
 			case "unusedKeys":
-				unusedKeysVal = append(unusedKeysVal, field)
+				unusedKeysVal = append(unusedKeysVal, fieldValue)
 				continue
 			}
 		}
@@ -684,7 +689,7 @@ func (d *decoder) decodeStruct(name string, node ast.Node, result reflect.Value)
 		// because we actually want the value.
 		fieldName = fmt.Sprintf("%s.%s", name, fieldName)
 		if len(prefixMatches.Items) > 0 {
-			if err := d.decode(fieldName, prefixMatches, field); err != nil {
+			if err := d.decode(fieldName, prefixMatches, fieldValue); err != nil {
 				return err
 			}
 		}
@@ -694,12 +699,12 @@ func (d *decoder) decodeStruct(name string, node ast.Node, result reflect.Value)
 				decodeNode = &ast.ObjectList{Items: ot.List.Items}
 			}
 
-			if err := d.decode(fieldName, decodeNode, field); err != nil {
+			if err := d.decode(fieldName, decodeNode, fieldValue); err != nil {
 				return err
 			}
 		}
 
-		decodedFields = append(decodedFields, fieldType.Name)
+		decodedFields = append(decodedFields, field.Name)
 	}
 
 	if len(decodedFieldsVal) > 0 {

vendor/github.com/hashicorp/hcl/go.mod

@@ -0,0 +1,3 @@
+module github.com/hashicorp/hcl
+
+require github.com/davecgh/go-spew v1.1.1

vendor/github.com/hashicorp/hcl/go.sum

@@ -0,0 +1,2 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=

vendor/github.com/hashicorp/hcl/hcl/parser/parser.go

@@ -197,9 +197,18 @@ func (p *Parser) objectItem() (*ast.ObjectItem, error) {
 			keyStr = append(keyStr, k.Token.Text)
 		}
 
-		return nil, fmt.Errorf(
+		return nil, &PosError{
+			Pos: p.tok.Pos,
+			Err: fmt.Errorf(
 				"key '%s' expected start of object ('{') or assignment ('=')",
-			strings.Join(keyStr, " "))
+				strings.Join(keyStr, " ")),
+		}
+	}
+
+	// key=#comment
+	// val
+	if p.lineComment != nil {
+		o.LineComment, p.lineComment = p.lineComment, nil
 	}
 
 	// do a look-ahead for line comment
@@ -319,7 +328,10 @@ func (p *Parser) objectType() (*ast.ObjectType, error) {
 
 	// No error, scan and expect the ending to be a brace
 	if tok := p.scan(); tok.Type != token.RBRACE {
-		return nil, fmt.Errorf("object expected closing RBRACE got: %s", tok.Type)
+		return nil, &PosError{
+			Pos: tok.Pos,
+			Err: fmt.Errorf("object expected closing RBRACE got: %s", tok.Type),
+		}
 	}
 
 	o.List = l

vendor/github.com/hashicorp/hcl/hcl/printer/nodes.go

@@ -252,6 +252,14 @@ func (p *printer) objectItem(o *ast.ObjectItem) []byte {
 		}
 	}
 
+	// If key and val are on different lines, treat line comments like lead comments.
+	if o.LineComment != nil && o.Val.Pos().Line != o.Keys[0].Pos().Line {
+		for _, comment := range o.LineComment.List {
+			buf.WriteString(comment.Text)
+			buf.WriteByte(newline)
+		}
+	}
+
 	for i, k := range o.Keys {
 		buf.WriteString(k.Token.Text)
 		buf.WriteByte(blank)
@@ -265,7 +273,7 @@ func (p *printer) objectItem(o *ast.ObjectItem) []byte {
 
 	buf.Write(p.output(o.Val))
 
-	if o.Val.Pos().Line == o.Keys[0].Pos().Line && o.LineComment != nil {
+	if o.LineComment != nil && o.Val.Pos().Line == o.Keys[0].Pos().Line {
 		buf.WriteByte(blank)
 		for _, comment := range o.LineComment.List {
 			buf.WriteString(comment.Text)
@@ -509,8 +517,13 @@ func (p *printer) alignedItems(items []*ast.ObjectItem) []byte {
 
 // list returns the printable HCL form of an list type.
 func (p *printer) list(l *ast.ListType) []byte {
+	if p.isSingleLineList(l) {
+		return p.singleLineList(l)
+	}
+
 	var buf bytes.Buffer
 	buf.WriteString("[")
+	buf.WriteByte(newline)
 
 	var longestLine int
 	for _, item := range l.List {
@@ -523,32 +536,16 @@ func (p *printer) list(l *ast.ListType) []byte {
 		}
 	}
 
-	insertSpaceBeforeItem := false
+	haveEmptyLine := false
-	lastHadLeadComment := false
 	for i, item := range l.List {
-		// Keep track of whether this item is a heredoc since that has
-		// unique behavior.
-		heredoc := false
-		if lit, ok := item.(*ast.LiteralType); ok && lit.Token.Type == token.HEREDOC {
-			heredoc = true
-		}
-
-		if item.Pos().Line != l.Lbrack.Line {
-			// multiline list, add newline before we add each item
-			buf.WriteByte(newline)
-			insertSpaceBeforeItem = false
-
 		// If we have a lead comment, then we want to write that first
 		leadComment := false
 		if lit, ok := item.(*ast.LiteralType); ok && lit.LeadComment != nil {
 			leadComment = true
 
-				// If this isn't the first item and the previous element
+			// Ensure an empty line before every element with a
-				// didn't have a lead comment, then we need to add an extra
+			// lead comment (except the first item in a list).
-				// newline to properly space things out. If it did have a
+			if !haveEmptyLine && i != 0 {
-				// lead comment previously then this would be done
-				// automatically.
-				if i > 0 && !lastHadLeadComment {
 				buf.WriteByte(newline)
 			}
 
@@ -566,7 +563,7 @@ func (p *printer) list(l *ast.ListType) []byte {
 		// if this item is a heredoc, then we output the comma on
 		// the next line. This is the only case this happens.
 		comma := []byte{','}
-			if heredoc {
+		if lit, ok := item.(*ast.LiteralType); ok && lit.Token.Type == token.HEREDOC {
 			buf.WriteByte(newline)
 			comma = p.indent(comma)
 		}
@@ -585,53 +582,66 @@ func (p *printer) list(l *ast.ListType) []byte {
 			}
 		}
 
-			lastItem := i == len(l.List)-1
+		buf.WriteByte(newline)
-			if lastItem {
+
+		// Ensure an empty line after every element with a
+		// lead comment (except the first item in a list).
+		haveEmptyLine = leadComment && i != len(l.List)-1
+		if haveEmptyLine {
 			buf.WriteByte(newline)
 		}
-
-			if leadComment && !lastItem {
-				buf.WriteByte(newline)
 	}
 
-			lastHadLeadComment = leadComment
+	buf.WriteString("]")
-		} else {
+	return buf.Bytes()
-			if insertSpaceBeforeItem {
+}
-				buf.WriteByte(blank)
+
-				insertSpaceBeforeItem = false
+// isSingleLineList returns true if:
+// * they were previously formatted entirely on one line
+// * they consist entirely of literals
+// * there are either no heredoc strings or the list has exactly one element
+// * there are no line comments
+func (printer) isSingleLineList(l *ast.ListType) bool {
+	for _, item := range l.List {
+		if item.Pos().Line != l.Lbrack.Line {
+			return false
+		}
+
+		lit, ok := item.(*ast.LiteralType)
+		if !ok {
+			return false
+		}
+
+		if lit.Token.Type == token.HEREDOC && len(l.List) != 1 {
+			return false
+		}
+
+		if lit.LineComment != nil {
+			return false
+		}
+	}
+
+	return true
+}
+
+// singleLineList prints a simple single line list.
+// For a definition of "simple", see isSingleLineList above.
+func (p *printer) singleLineList(l *ast.ListType) []byte {
+	buf := &bytes.Buffer{}
+
+	buf.WriteString("[")
+	for i, item := range l.List {
+		if i != 0 {
+			buf.WriteString(", ")
 		}
 
 		// Output the item itself
-			// also indent each line
+		buf.Write(p.output(item))
-			val := p.output(item)
-			curLen := len(val)
-			buf.Write(val)
 
-			// If this is a heredoc item we always have to output a newline
+		// The heredoc marker needs to be at the end of line.
-			// so that it parses properly.
+		if lit, ok := item.(*ast.LiteralType); ok && lit.Token.Type == token.HEREDOC {
-			if heredoc {
 			buf.WriteByte(newline)
 		}
-
-			// If this isn't the last element, write a comma.
-			if i != len(l.List)-1 {
-				buf.WriteString(",")
-				insertSpaceBeforeItem = true
-			}
-
-			if lit, ok := item.(*ast.LiteralType); ok && lit.LineComment != nil {
-				// if the next item doesn't have any comments, do not align
-				buf.WriteByte(blank) // align one space
-				for i := 0; i < longestLine-curLen; i++ {
-					buf.WriteByte(blank)
-				}
-
-				for _, comment := range lit.LineComment.List {
-					buf.WriteString(comment.Text)
-				}
-			}
-		}
-
 	}
 
 	buf.WriteString("]")

vendor/github.com/hashicorp/hcl/hcl/scanner/scanner.go

@@ -74,14 +74,6 @@ func (s *Scanner) next() rune {
 		return eof
 	}
 
-	if ch == utf8.RuneError && size == 1 {
-		s.srcPos.Column++
-		s.srcPos.Offset += size
-		s.lastCharLen = size
-		s.err("illegal UTF-8 encoding")
-		return ch
-	}
-
 	// remember last position
 	s.prevPos = s.srcPos
 
@@ -89,18 +81,27 @@ func (s *Scanner) next() rune {
 	s.lastCharLen = size
 	s.srcPos.Offset += size
 
+	if ch == utf8.RuneError && size == 1 {
+		s.err("illegal UTF-8 encoding")
+		return ch
+	}
+
 	if ch == '\n' {
 		s.srcPos.Line++
 		s.lastLineLen = s.srcPos.Column
 		s.srcPos.Column = 0
 	}
 
-	// If we see a null character with data left, then that is an error
+	if ch == '\x00' {
-	if ch == '\x00' && s.buf.Len() > 0 {
 		s.err("unexpected null character (0x00)")
 		return eof
 	}
 
+	if ch == '\uE123' {
+		s.err("unicode code point U+E123 reserved for internal use")
+		return utf8.RuneError
+	}
+
 	// debug
 	// fmt.Printf("ch: %q, offset:column: %d:%d\n", ch, s.srcPos.Offset, s.srcPos.Column)
 	return ch
@@ -351,7 +352,7 @@ func (s *Scanner) scanNumber(ch rune) token.Type {
 	return token.NUMBER
 }
 
-// scanMantissa scans the mantissa begining from the rune. It returns the next
+// scanMantissa scans the mantissa beginning from the rune. It returns the next
 // non decimal rune. It's used to determine wheter it's a fraction or exponent.
 func (s *Scanner) scanMantissa(ch rune) rune {
 	scanned := false
@@ -432,16 +433,16 @@ func (s *Scanner) scanHeredoc() {
 
 	// Read the identifier
 	identBytes := s.src[offs : s.srcPos.Offset-s.lastCharLen]
-	if len(identBytes) == 0 {
+	if len(identBytes) == 0 || (len(identBytes) == 1 && identBytes[0] == '-') {
 		s.err("zero-length heredoc anchor")
 		return
 	}
 
 	var identRegexp *regexp.Regexp
 	if identBytes[0] == '-' {
-		identRegexp = regexp.MustCompile(fmt.Sprintf(`[[:space:]]*%s\z`, identBytes[1:]))
+		identRegexp = regexp.MustCompile(fmt.Sprintf(`^[[:space:]]*%s\r*\z`, identBytes[1:]))
 	} else {
-		identRegexp = regexp.MustCompile(fmt.Sprintf(`[[:space:]]*%s\z`, identBytes))
+		identRegexp = regexp.MustCompile(fmt.Sprintf(`^[[:space:]]*%s\r*\z`, identBytes))
 	}
 
 	// Read the actual string value
@@ -551,7 +552,7 @@ func (s *Scanner) scanDigits(ch rune, base, n int) rune {
 		s.err("illegal char escape")
 	}
 
-	if n != start {
+	if n != start && ch != eof {
 		// we scanned all digits, put the last non digit char back,
 		// only if we read anything at all
 		s.unread()

vendor/github.com/hashicorp/hcl/json/scanner/scanner.go

@@ -246,7 +246,7 @@ func (s *Scanner) scanNumber(ch rune) token.Type {
 	return token.NUMBER
 }
 
-// scanMantissa scans the mantissa begining from the rune. It returns the next
+// scanMantissa scans the mantissa beginning from the rune. It returns the next
 // non decimal rune. It's used to determine wheter it's a fraction or exponent.
 func (s *Scanner) scanMantissa(ch rune) rune {
 	scanned := false

vendor/github.com/hashicorp/terraform-config-inspect/LICENSE

@@ -0,0 +1,353 @@
+Mozilla Public License, version 2.0
+
+1. Definitions
+
+1.1. “Contributor”
+
+     means each individual or legal entity that creates, contributes to the
+     creation of, or owns Covered Software.
+
+1.2. “Contributor Version”
+
+     means the combination of the Contributions of others (if any) used by a
+     Contributor and that particular Contributor’s Contribution.
+
+1.3. “Contribution”
+
+     means Covered Software of a particular Contributor.
+
+1.4. “Covered Software”
+
+     means Source Code Form to which the initial Contributor has attached the
+     notice in Exhibit A, the Executable Form of such Source Code Form, and
+     Modifications of such Source Code Form, in each case including portions
+     thereof.
+
+1.5. “Incompatible With Secondary Licenses”
+     means
+
+     a. that the initial Contributor has attached the notice described in
+        Exhibit B to the Covered Software; or
+
+     b. that the Covered Software was made available under the terms of version
+        1.1 or earlier of the License, but not also under the terms of a
+        Secondary License.
+
+1.6. “Executable Form”
+
+     means any form of the work other than Source Code Form.
+
+1.7. “Larger Work”
+
+     means a work that combines Covered Software with other material, in a separate
+     file or files, that is not Covered Software.
+
+1.8. “License”
+
+     means this document.
+
+1.9. “Licensable”
+
+     means having the right to grant, to the maximum extent possible, whether at the
+     time of the initial grant or subsequently, any and all of the rights conveyed by
+     this License.
+
+1.10. “Modifications”
+
+     means any of the following:
+
+     a. any file in Source Code Form that results from an addition to, deletion
+        from, or modification of the contents of Covered Software; or
+
+     b. any new file in Source Code Form that contains any Covered Software.
+
+1.11. “Patent Claims” of a Contributor
+
+      means any patent claim(s), including without limitation, method, process,
+      and apparatus claims, in any patent Licensable by such Contributor that
+      would be infringed, but for the grant of the License, by the making,
+      using, selling, offering for sale, having made, import, or transfer of
+      either its Contributions or its Contributor Version.
+
+1.12. “Secondary License”
+
+      means either the GNU General Public License, Version 2.0, the GNU Lesser
+      General Public License, Version 2.1, the GNU Affero General Public
+      License, Version 3.0, or any later versions of those licenses.
+
+1.13. “Source Code Form”
+
+      means the form of the work preferred for making modifications.
+
+1.14. “You” (or “Your”)
+
+      means an individual or a legal entity exercising rights under this
+      License. For legal entities, “You” includes any entity that controls, is
+      controlled by, or is under common control with You. For purposes of this
+      definition, “control” means (a) the power, direct or indirect, to cause
+      the direction or management of such entity, whether by contract or
+      otherwise, or (b) ownership of more than fifty percent (50%) of the
+      outstanding shares or beneficial ownership of such entity.
+
+
+2. License Grants and Conditions
+
+2.1. Grants
+
+     Each Contributor hereby grants You a world-wide, royalty-free,
+     non-exclusive license:
+
+     a. under intellectual property rights (other than patent or trademark)
+        Licensable by such Contributor to use, reproduce, make available,
+        modify, display, perform, distribute, and otherwise exploit its
+        Contributions, either on an unmodified basis, with Modifications, or as
+        part of a Larger Work; and
+
+     b. under Patent Claims of such Contributor to make, use, sell, offer for
+        sale, have made, import, and otherwise transfer either its Contributions
+        or its Contributor Version.
+
+2.2. Effective Date
+
+     The licenses granted in Section 2.1 with respect to any Contribution become
+     effective for each Contribution on the date the Contributor first distributes
+     such Contribution.
+
+2.3. Limitations on Grant Scope
+
+     The licenses granted in this Section 2 are the only rights granted under this
+     License. No additional rights or licenses will be implied from the distribution
+     or licensing of Covered Software under this License. Notwithstanding Section
+     2.1(b) above, no patent license is granted by a Contributor:
+
+     a. for any code that a Contributor has removed from Covered Software; or
+
+     b. for infringements caused by: (i) Your and any other third party’s
+        modifications of Covered Software, or (ii) the combination of its
+        Contributions with other software (except as part of its Contributor
+        Version); or
+
+     c. under Patent Claims infringed by Covered Software in the absence of its
+        Contributions.
+
+     This License does not grant any rights in the trademarks, service marks, or
+     logos of any Contributor (except as may be necessary to comply with the
+     notice requirements in Section 3.4).
+
+2.4. Subsequent Licenses
+
+     No Contributor makes additional grants as a result of Your choice to
+     distribute the Covered Software under a subsequent version of this License
+     (see Section 10.2) or under the terms of a Secondary License (if permitted
+     under the terms of Section 3.3).
+
+2.5. Representation
+
+     Each Contributor represents that the Contributor believes its Contributions
+     are its original creation(s) or it has sufficient rights to grant the
+     rights to its Contributions conveyed by this License.
+
+2.6. Fair Use
+
+     This License is not intended to limit any rights You have under applicable
+     copyright doctrines of fair use, fair dealing, or other equivalents.
+
+2.7. Conditions
+
+     Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted in
+     Section 2.1.
+
+
+3. Responsibilities
+
+3.1. Distribution of Source Form
+
+     All distribution of Covered Software in Source Code Form, including any
+     Modifications that You create or to which You contribute, must be under the
+     terms of this License. You must inform recipients that the Source Code Form
+     of the Covered Software is governed by the terms of this License, and how
+     they can obtain a copy of this License. You may not attempt to alter or
+     restrict the recipients’ rights in the Source Code Form.
+
+3.2. Distribution of Executable Form
+
+     If You distribute Covered Software in Executable Form then:
+
+     a. such Covered Software must also be made available in Source Code Form,
+        as described in Section 3.1, and You must inform recipients of the
+        Executable Form how they can obtain a copy of such Source Code Form by
+        reasonable means in a timely manner, at a charge no more than the cost
+        of distribution to the recipient; and
+
+     b. You may distribute such Executable Form under the terms of this License,
+        or sublicense it under different terms, provided that the license for
+        the Executable Form does not attempt to limit or alter the recipients’
+        rights in the Source Code Form under this License.
+
+3.3. Distribution of a Larger Work
+
+     You may create and distribute a Larger Work under terms of Your choice,
+     provided that You also comply with the requirements of this License for the
+     Covered Software. If the Larger Work is a combination of Covered Software
+     with a work governed by one or more Secondary Licenses, and the Covered
+     Software is not Incompatible With Secondary Licenses, this License permits
+     You to additionally distribute such Covered Software under the terms of
+     such Secondary License(s), so that the recipient of the Larger Work may, at
+     their option, further distribute the Covered Software under the terms of
+     either this License or such Secondary License(s).
+
+3.4. Notices
+
+     You may not remove or alter the substance of any license notices (including
+     copyright notices, patent notices, disclaimers of warranty, or limitations
+     of liability) contained within the Source Code Form of the Covered
+     Software, except that You may alter any license notices to the extent
+     required to remedy known factual inaccuracies.
+
+3.5. Application of Additional Terms
+
+     You may choose to offer, and to charge a fee for, warranty, support,
+     indemnity or liability obligations to one or more recipients of Covered
+     Software. However, You may do so only on Your own behalf, and not on behalf
+     of any Contributor. You must make it absolutely clear that any such
+     warranty, support, indemnity, or liability obligation is offered by You
+     alone, and You hereby agree to indemnify every Contributor for any
+     liability incurred by such Contributor as a result of warranty, support,
+     indemnity or liability terms You offer. You may include additional
+     disclaimers of warranty and limitations of liability specific to any
+     jurisdiction.
+
+4. Inability to Comply Due to Statute or Regulation
+
+   If it is impossible for You to comply with any of the terms of this License
+   with respect to some or all of the Covered Software due to statute, judicial
+   order, or regulation then You must: (a) comply with the terms of this License
+   to the maximum extent possible; and (b) describe the limitations and the code
+   they affect. Such description must be placed in a text file included with all
+   distributions of the Covered Software under this License. Except to the
+   extent prohibited by statute or regulation, such description must be
+   sufficiently detailed for a recipient of ordinary skill to be able to
+   understand it.
+
+5. Termination
+
+5.1. The rights granted under this License will terminate automatically if You
+     fail to comply with any of its terms. However, if You become compliant,
+     then the rights granted under this License from a particular Contributor
+     are reinstated (a) provisionally, unless and until such Contributor
+     explicitly and finally terminates Your grants, and (b) on an ongoing basis,
+     if such Contributor fails to notify You of the non-compliance by some
+     reasonable means prior to 60 days after You have come back into compliance.
+     Moreover, Your grants from a particular Contributor are reinstated on an
+     ongoing basis if such Contributor notifies You of the non-compliance by
+     some reasonable means, this is the first time You have received notice of
+     non-compliance with this License from such Contributor, and You become
+     compliant prior to 30 days after Your receipt of the notice.
+
+5.2. If You initiate litigation against any entity by asserting a patent
+     infringement claim (excluding declaratory judgment actions, counter-claims,
+     and cross-claims) alleging that a Contributor Version directly or
+     indirectly infringes any patent, then the rights granted to You by any and
+     all Contributors for the Covered Software under Section 2.1 of this License
+     shall terminate.
+
+5.3. In the event of termination under Sections 5.1 or 5.2 above, all end user
+     license agreements (excluding distributors and resellers) which have been
+     validly granted by You or Your distributors under this License prior to
+     termination shall survive termination.
+
+6. Disclaimer of Warranty
+
+   Covered Software is provided under this License on an “as is” basis, without
+   warranty of any kind, either expressed, implied, or statutory, including,
+   without limitation, warranties that the Covered Software is free of defects,
+   merchantable, fit for a particular purpose or non-infringing. The entire
+   risk as to the quality and performance of the Covered Software is with You.
+   Should any Covered Software prove defective in any respect, You (not any
+   Contributor) assume the cost of any necessary servicing, repair, or
+   correction. This disclaimer of warranty constitutes an essential part of this
+   License. No use of  any Covered Software is authorized under this License
+   except under this disclaimer.
+
+7. Limitation of Liability
+
+   Under no circumstances and under no legal theory, whether tort (including
+   negligence), contract, or otherwise, shall any Contributor, or anyone who
+   distributes Covered Software as permitted above, be liable to You for any
+   direct, indirect, special, incidental, or consequential damages of any
+   character including, without limitation, damages for lost profits, loss of
+   goodwill, work stoppage, computer failure or malfunction, or any and all
+   other commercial damages or losses, even if such party shall have been
+   informed of the possibility of such damages. This limitation of liability
+   shall not apply to liability for death or personal injury resulting from such
+   party’s negligence to the extent applicable law prohibits such limitation.
+   Some jurisdictions do not allow the exclusion or limitation of incidental or
+   consequential damages, so this exclusion and limitation may not apply to You.
+
+8. Litigation
+
+   Any litigation relating to this License may be brought only in the courts of
+   a jurisdiction where the defendant maintains its principal place of business
+   and such litigation shall be governed by laws of that jurisdiction, without
+   reference to its conflict-of-law provisions. Nothing in this Section shall
+   prevent a party’s ability to bring cross-claims or counter-claims.
+
+9. Miscellaneous
+
+   This License represents the complete agreement concerning the subject matter
+   hereof. If any provision of this License is held to be unenforceable, such
+   provision shall be reformed only to the extent necessary to make it
+   enforceable. Any law or regulation which provides that the language of a
+   contract shall be construed against the drafter shall not be used to construe
+   this License against a Contributor.
+
+
+10. Versions of the License
+
+10.1. New Versions
+
+      Mozilla Foundation is the license steward. Except as provided in Section
+      10.3, no one other than the license steward has the right to modify or
+      publish new versions of this License. Each version will be given a
+      distinguishing version number.
+
+10.2. Effect of New Versions
+
+      You may distribute the Covered Software under the terms of the version of
+      the License under which You originally received the Covered Software, or
+      under the terms of any subsequent version published by the license
+      steward.
+
+10.3. Modified Versions
+
+      If you create software not governed by this License, and you want to
+      create a new license for such software, you may create and use a modified
+      version of this License if you rename the license and remove any
+      references to the name of the license steward (except to note that such
+      modified license differs from this License).
+
+10.4. Distributing Source Code Form that is Incompatible With Secondary Licenses
+      If You choose to distribute Source Code Form that is Incompatible With
+      Secondary Licenses under the terms of this version of the License, the
+      notice described in Exhibit B of this License must be attached.
+
+Exhibit A - Source Code Form License Notice
+
+      This Source Code Form is subject to the
+      terms of the Mozilla Public License, v.
+      2.0. If a copy of the MPL was not
+      distributed with this file, You can
+      obtain one at
+      http://mozilla.org/MPL/2.0/.
+
+If it is not possible or desirable to put the notice in a particular file, then
+You may include the notice in a location (such as a LICENSE file in a relevant
+directory) where a recipient would be likely to look for such a notice.
+
+You may add additional accurate notices of copyright ownership.
+
+Exhibit B - “Incompatible With Secondary Licenses” Notice
+
+      This Source Code Form is “Incompatible
+      With Secondary Licenses”, as defined by
+      the Mozilla Public License, v. 2.0.

vendor/github.com/hashicorp/terraform-config-inspect/tfconfig/diagnostic.go

@@ -0,0 +1,138 @@
+package tfconfig
+
+import (
+	"fmt"
+
+	legacyhclparser "github.com/hashicorp/hcl/hcl/parser"
+	"github.com/hashicorp/hcl2/hcl"
+)
+
+// Diagnostic describes a problem (error or warning) encountered during
+// configuration loading.
+type Diagnostic struct {
+	Severity DiagSeverity `json:"severity"`
+	Summary  string       `json:"summary"`
+	Detail   string       `json:"detail,omitempty"`
+
+	// Pos is not populated for all diagnostics, but when populated should
+	// indicate a particular line that the described problem relates to.
+	Pos *SourcePos `json:"pos,omitempty"`
+}
+
+// Diagnostics represents a sequence of diagnostics. This is the type that
+// should be returned from a function that might generate diagnostics.
+type Diagnostics []Diagnostic
+
+// HasErrors returns true if there is at least one Diagnostic of severity
+// DiagError in the receiever.
+//
+// If a function returns a Diagnostics without errors then the result can
+// be assumed to be complete within the "best effort" constraints of this
+// library. If errors are present then the caller may wish to employ more
+// caution in relying on the result.
+func (diags Diagnostics) HasErrors() bool {
+	for _, diag := range diags {
+		if diag.Severity == DiagError {
+			return true
+		}
+	}
+	return false
+}
+
+func (diags Diagnostics) Error() string {
+	switch len(diags) {
+	case 0:
+		return "no problems"
+	case 1:
+		return fmt.Sprintf("%s: %s", diags[0].Summary, diags[0].Detail)
+	default:
+		return fmt.Sprintf("%s: %s (and %d other messages)", diags[0].Summary, diags[0].Detail, len(diags)-1)
+	}
+}
+
+// Err returns an error representing the receiver if the receiver HasErrors, or
+// nil otherwise.
+//
+// The returned error can be type-asserted back to a Diagnostics if needed.
+func (diags Diagnostics) Err() error {
+	if diags.HasErrors() {
+		return diags
+	}
+	return nil
+}
+
+// DiagSeverity describes the severity of a Diagnostic.
+type DiagSeverity rune
+
+// DiagError indicates a problem that prevented proper processing of the
+// configuration. In the precense of DiagError diagnostics the result is
+// likely to be incomplete.
+const DiagError DiagSeverity = 'E'
+
+// DiagWarning indicates a problem that the user may wish to consider but
+// that did not prevent proper processing of the configuration.
+const DiagWarning DiagSeverity = 'W'
+
+// MarshalJSON is an implementation of encoding/json.Marshaler
+func (s DiagSeverity) MarshalJSON() ([]byte, error) {
+	switch s {
+	case DiagError:
+		return []byte(`"error"`), nil
+	case DiagWarning:
+		return []byte(`"warning"`), nil
+	default:
+		return []byte(`"invalid"`), nil
+	}
+}
+
+func diagnosticsHCL(diags hcl.Diagnostics) Diagnostics {
+	if len(diags) == 0 {
+		return nil
+	}
+	ret := make(Diagnostics, len(diags))
+	for i, diag := range diags {
+		ret[i] = Diagnostic{
+			Summary: diag.Summary,
+			Detail:  diag.Detail,
+		}
+		switch diag.Severity {
+		case hcl.DiagError:
+			ret[i].Severity = DiagError
+		case hcl.DiagWarning:
+			ret[i].Severity = DiagWarning
+		}
+		if diag.Subject != nil {
+			pos := sourcePosHCL(*diag.Subject)
+			ret[i].Pos = &pos
+		}
+	}
+	return ret
+}
+
+func diagnosticsError(err error) Diagnostics {
+	if err == nil {
+		return nil
+	}
+
+	if posErr, ok := err.(*legacyhclparser.PosError); ok {
+		pos := sourcePosLegacyHCL(posErr.Pos, "")
+		return Diagnostics{
+			Diagnostic{
+				Severity: DiagError,
+				Summary:  posErr.Err.Error(),
+				Pos:      &pos,
+			},
+		}
+	}
+
+	return Diagnostics{
+		Diagnostic{
+			Severity: DiagError,
+			Summary:  err.Error(),
+		},
+	}
+}
+
+func diagnosticsErrorf(format string, args ...interface{}) Diagnostics {
+	return diagnosticsError(fmt.Errorf(format, args...))
+}

vendor/github.com/hashicorp/terraform-config-inspect/tfconfig/doc.go

@@ -0,0 +1,21 @@
+// Package tfconfig is a helper library that does careful, shallow parsing of
+// Terraform modules to provide access to high-level metadata while
+// remaining broadly compatible with configurations targeting various
+// different Terraform versions.
+//
+// This packge focuses on describing top-level objects only, and in particular
+// does not attempt any sort of processing that would require access to plugins.
+// Currently it allows callers to extract high-level information about
+// variables, outputs, resource blocks, provider dependencies, and Terraform
+// Core dependencies.
+//
+// This package only works at the level of single modules. A full configuration
+// is a tree of potentially several modules, some of which may be references
+// to remote packages. There are some basic helpers for traversing calls to
+// modules at relative local paths, however.
+//
+// This package employs a "best effort" parsing strategy, producing as complete
+// a result as possible even though the input may not be entirely valid. The
+// intended use-case is high-level analysis and indexing of externally-facing
+// module characteristics, as opposed to validating or even applying the module.
+package tfconfig

vendor/github.com/hashicorp/terraform-config-inspect/tfconfig/load.go

@@ -0,0 +1,130 @@
+package tfconfig
+
+import (
+	"fmt"
+	"io/ioutil"
+	"path/filepath"
+	"strings"
+
+	"github.com/hashicorp/hcl2/hcl"
+)
+
+// LoadModule reads the directory at the given path and attempts to interpret
+// it as a Terraform module.
+func LoadModule(dir string) (*Module, Diagnostics) {
+
+	// For broad compatibility here we actually have two separate loader
+	// codepaths. The main one uses the new HCL parser and API and is intended
+	// for configurations from Terraform 0.12 onwards (though will work for
+	// many older configurations too), but we'll also fall back on one that
+	// uses the _old_ HCL implementation so we can deal with some edge-cases
+	// that are not valid in new HCL.
+
+	module, diags := loadModule(dir)
+	if diags.HasErrors() {
+		// Try using the legacy HCL parser and see if we fare better.
+		legacyModule, legacyDiags := loadModuleLegacyHCL(dir)
+		if !legacyDiags.HasErrors() {
+			legacyModule.init(legacyDiags)
+			return legacyModule, legacyDiags
+		}
+	}
+
+	module.init(diags)
+	return module, diags
+}
+
+// IsModuleDir checks if the given path contains terraform configuration files.
+// This allows the caller to decide how to handle directories that do not have tf files.
+func IsModuleDir(dir string) bool {
+	primaryPaths, _ := dirFiles(dir)
+	if len(primaryPaths) == 0 {
+		return false
+	}
+	return true
+}
+
+func (m *Module) init(diags Diagnostics) {
+	// Fill in any additional provider requirements that are implied by
+	// resource configurations, to avoid the caller from needing to apply
+	// this logic itself. Implied requirements don't have version constraints,
+	// but we'll make sure the requirement value is still non-nil in this
+	// case so callers can easily recognize it.
+	for _, r := range m.ManagedResources {
+		if _, exists := m.RequiredProviders[r.Provider.Name]; !exists {
+			m.RequiredProviders[r.Provider.Name] = []string{}
+		}
+	}
+	for _, r := range m.DataResources {
+		if _, exists := m.RequiredProviders[r.Provider.Name]; !exists {
+			m.RequiredProviders[r.Provider.Name] = []string{}
+		}
+	}
+
+	// We redundantly also reference the diagnostics from inside the module
+	// object, primarily so that we can easily included in JSON-serialized
+	// versions of the module object.
+	m.Diagnostics = diags
+}
+
+func dirFiles(dir string) (primary []string, diags hcl.Diagnostics) {
+	infos, err := ioutil.ReadDir(dir)
+	if err != nil {
+		diags = append(diags, &hcl.Diagnostic{
+			Severity: hcl.DiagError,
+			Summary:  "Failed to read module directory",
+			Detail:   fmt.Sprintf("Module directory %s does not exist or cannot be read.", dir),
+		})
+		return
+	}
+
+	var override []string
+	for _, info := range infos {
+		if info.IsDir() {
+			// We only care about files
+			continue
+		}
+
+		name := info.Name()
+		ext := fileExt(name)
+		if ext == "" || isIgnoredFile(name) {
+			continue
+		}
+
+		baseName := name[:len(name)-len(ext)] // strip extension
+		isOverride := baseName == "override" || strings.HasSuffix(baseName, "_override")
+
+		fullPath := filepath.Join(dir, name)
+		if isOverride {
+			override = append(override, fullPath)
+		} else {
+			primary = append(primary, fullPath)
+		}
+	}
+
+	// We are assuming that any _override files will be logically named,
+	// and processing the files in alphabetical order. Primaries first, then overrides.
+	primary = append(primary, override...)
+
+	return
+}
+
+// fileExt returns the Terraform configuration extension of the given
+// path, or a blank string if it is not a recognized extension.
+func fileExt(path string) string {
+	if strings.HasSuffix(path, ".tf") {
+		return ".tf"
+	} else if strings.HasSuffix(path, ".tf.json") {
+		return ".tf.json"
+	} else {
+		return ""
+	}
+}
+
+// isIgnoredFile returns true if the given filename (which must not have a
+// directory path ahead of it) should be ignored as e.g. an editor swap file.
+func isIgnoredFile(name string) bool {
+	return strings.HasPrefix(name, ".") || // Unix-like hidden files
+		strings.HasSuffix(name, "~") || // vim
+		strings.HasPrefix(name, "#") && strings.HasSuffix(name, "#") // emacs
+}

vendor/github.com/hashicorp/terraform-config-inspect/tfconfig/load_hcl.go

@@ -0,0 +1,312 @@
+package tfconfig
+
+import (
+	"encoding/json"
+	"fmt"
+	"strings"
+
+	"github.com/hashicorp/hcl2/hcl/hclsyntax"
+
+	"github.com/hashicorp/hcl2/gohcl"
+	"github.com/hashicorp/hcl2/hcl"
+	"github.com/hashicorp/hcl2/hclparse"
+	ctyjson "github.com/zclconf/go-cty/cty/json"
+)
+
+func loadModule(dir string) (*Module, Diagnostics) {
+	mod := newModule(dir)
+	primaryPaths, diags := dirFiles(dir)
+
+	parser := hclparse.NewParser()
+
+	for _, filename := range primaryPaths {
+		var file *hcl.File
+		var fileDiags hcl.Diagnostics
+		if strings.HasSuffix(filename, ".json") {
+			file, fileDiags = parser.ParseJSONFile(filename)
+		} else {
+			file, fileDiags = parser.ParseHCLFile(filename)
+		}
+		diags = append(diags, fileDiags...)
+		if file == nil {
+			continue
+		}
+
+		content, _, contentDiags := file.Body.PartialContent(rootSchema)
+		diags = append(diags, contentDiags...)
+
+		for _, block := range content.Blocks {
+			switch block.Type {
+
+			case "terraform":
+				content, _, contentDiags := block.Body.PartialContent(terraformBlockSchema)
+				diags = append(diags, contentDiags...)
+
+				if attr, defined := content.Attributes["required_version"]; defined {
+					var version string
+					valDiags := gohcl.DecodeExpression(attr.Expr, nil, &version)
+					diags = append(diags, valDiags...)
+					if !valDiags.HasErrors() {
+						mod.RequiredCore = append(mod.RequiredCore, version)
+					}
+				}
+
+				for _, block := range content.Blocks {
+					// Our schema only allows required_providers here, so we
+					// assume that we'll only get that block type.
+					attrs, attrDiags := block.Body.JustAttributes()
+					diags = append(diags, attrDiags...)
+
+					for name, attr := range attrs {
+						var version string
+						valDiags := gohcl.DecodeExpression(attr.Expr, nil, &version)
+						diags = append(diags, valDiags...)
+						if !valDiags.HasErrors() {
+							mod.RequiredProviders[name] = append(mod.RequiredProviders[name], version)
+						}
+					}
+				}
+
+			case "variable":
+				content, _, contentDiags := block.Body.PartialContent(variableSchema)
+				diags = append(diags, contentDiags...)
+
+				name := block.Labels[0]
+				v := &Variable{
+					Name: name,
+					Pos:  sourcePosHCL(block.DefRange),
+				}
+
+				mod.Variables[name] = v
+
+				if attr, defined := content.Attributes["type"]; defined {
+					// We handle this particular attribute in a somewhat-tricky way:
+					// since Terraform may evolve its type expression syntax in
+					// future versions, we don't want to be overly-strict in how
+					// we handle it here, and so we'll instead just take the raw
+					// source provided by the user, using the source location
+					// information in the expression object.
+					//
+					// However, older versions of Terraform expected the type
+					// to be a string containing a keyword, so we'll need to
+					// handle that as a special case first for backward compatibility.
+
+					var typeExpr string
+
+					var typeExprAsStr string
+					valDiags := gohcl.DecodeExpression(attr.Expr, nil, &typeExprAsStr)
+					if !valDiags.HasErrors() {
+						typeExpr = typeExprAsStr
+					} else {
+
+						rng := attr.Expr.Range()
+						sourceFilename := rng.Filename
+						source, exists := parser.Sources()[sourceFilename]
+						if exists {
+							typeExpr = string(rng.SliceBytes(source))
+						} else {
+							// This should never happen, so we'll just warn about it and leave the type unspecified.
+							diags = append(diags, &hcl.Diagnostic{
+								Severity: hcl.DiagError,
+								Summary:  "Source code not available",
+								Detail:   fmt.Sprintf("Source code is not available for the file %q, which declares the variable %q.", sourceFilename, name),
+								Subject:  &block.DefRange,
+							})
+							typeExpr = ""
+						}
+
+					}
+
+					v.Type = typeExpr
+				}
+
+				if attr, defined := content.Attributes["description"]; defined {
+					var description string
+					valDiags := gohcl.DecodeExpression(attr.Expr, nil, &description)
+					diags = append(diags, valDiags...)
+					v.Description = description
+				}
+
+				if attr, defined := content.Attributes["default"]; defined {
+					// To avoid the caller needing to deal with cty here, we'll
+					// use its JSON encoding to convert into an
+					// approximately-equivalent plain Go interface{} value
+					// to return.
+					val, valDiags := attr.Expr.Value(nil)
+					diags = append(diags, valDiags...)
+					if val.IsWhollyKnown() { // should only be false if there are errors in the input
+						valJSON, err := ctyjson.Marshal(val, val.Type())
+						if err != nil {
+							// Should never happen, since all possible known
+							// values have a JSON mapping.
+							panic(fmt.Errorf("failed to serialize default value as JSON: %s", err))
+						}
+						var def interface{}
+						err = json.Unmarshal(valJSON, &def)
+						if err != nil {
+							// Again should never happen, because valJSON is
+							// guaranteed valid by ctyjson.Marshal.
+							panic(fmt.Errorf("failed to re-parse default value from JSON: %s", err))
+						}
+						v.Default = def
+					}
+				}
+
+			case "output":
+
+				content, _, contentDiags := block.Body.PartialContent(outputSchema)
+				diags = append(diags, contentDiags...)
+
+				name := block.Labels[0]
+				o := &Output{
+					Name: name,
+					Pos:  sourcePosHCL(block.DefRange),
+				}
+
+				mod.Outputs[name] = o
+
+				if attr, defined := content.Attributes["description"]; defined {
+					var description string
+					valDiags := gohcl.DecodeExpression(attr.Expr, nil, &description)
+					diags = append(diags, valDiags...)
+					o.Description = description
+				}
+
+			case "provider":
+
+				content, _, contentDiags := block.Body.PartialContent(providerConfigSchema)
+				diags = append(diags, contentDiags...)
+
+				name := block.Labels[0]
+
+				if attr, defined := content.Attributes["version"]; defined {
+					var version string
+					valDiags := gohcl.DecodeExpression(attr.Expr, nil, &version)
+					diags = append(diags, valDiags...)
+					if !valDiags.HasErrors() {
+						mod.RequiredProviders[name] = append(mod.RequiredProviders[name], version)
+					}
+				}
+
+				// Even if there wasn't an explicit version required, we still
+				// need an entry in our map to signal the unversioned dependency.
+				if _, exists := mod.RequiredProviders[name]; !exists {
+					mod.RequiredProviders[name] = []string{}
+				}
+
+			case "resource", "data":
+
+				content, _, contentDiags := block.Body.PartialContent(resourceSchema)
+				diags = append(diags, contentDiags...)
+
+				typeName := block.Labels[0]
+				name := block.Labels[1]
+
+				r := &Resource{
+					Type: typeName,
+					Name: name,
+					Pos:  sourcePosHCL(block.DefRange),
+				}
+
+				var resourcesMap map[string]*Resource
+
+				switch block.Type {
+				case "resource":
+					r.Mode = ManagedResourceMode
+					resourcesMap = mod.ManagedResources
+				case "data":
+					r.Mode = DataResourceMode
+					resourcesMap = mod.DataResources
+				}
+
+				key := r.MapKey()
+
+				resourcesMap[key] = r
+
+				if attr, defined := content.Attributes["provider"]; defined {
+					// New style here is to provide this as a naked traversal
+					// expression, but we also support quoted references for
+					// older configurations that predated this convention.
+					traversal, travDiags := hcl.AbsTraversalForExpr(attr.Expr)
+					if travDiags.HasErrors() {
+						traversal = nil // in case we got any partial results
+
+						// Fall back on trying to parse as a string
+						var travStr string
+						valDiags := gohcl.DecodeExpression(attr.Expr, nil, &travStr)
+						if !valDiags.HasErrors() {
+							var strDiags hcl.Diagnostics
+							traversal, strDiags = hclsyntax.ParseTraversalAbs([]byte(travStr), "", hcl.Pos{})
+							if strDiags.HasErrors() {
+								traversal = nil
+							}
+						}
+					}
+
+					// If we get out here with a nil traversal then we didn't
+					// succeed in processing the input.
+					if len(traversal) > 0 {
+						providerName := traversal.RootName()
+						alias := ""
+						if len(traversal) > 1 {
+							if getAttr, ok := traversal[1].(hcl.TraverseAttr); ok {
+								alias = getAttr.Name
+							}
+						}
+						r.Provider = ProviderRef{
+							Name:  providerName,
+							Alias: alias,
+						}
+					} else {
+						diags = append(diags, &hcl.Diagnostic{
+							Severity: hcl.DiagError,
+							Summary:  "Invalid provider reference",
+							Detail:   "Provider argument requires a provider name followed by an optional alias, like \"aws.foo\".",
+							Subject:  attr.Expr.Range().Ptr(),
+						})
+					}
+				} else {
+					// If provider _isn't_ set then we'll infer it from the
+					// resource type.
+					r.Provider = ProviderRef{
+						Name: resourceTypeDefaultProviderName(r.Type),
+					}
+				}
+
+			case "module":
+
+				content, _, contentDiags := block.Body.PartialContent(moduleCallSchema)
+				diags = append(diags, contentDiags...)
+
+				name := block.Labels[0]
+				mc := &ModuleCall{
+					Name: block.Labels[0],
+					Pos:  sourcePosHCL(block.DefRange),
+				}
+
+				mod.ModuleCalls[name] = mc
+
+				if attr, defined := content.Attributes["source"]; defined {
+					var source string
+					valDiags := gohcl.DecodeExpression(attr.Expr, nil, &source)
+					diags = append(diags, valDiags...)
+					mc.Source = source
+				}
+
+				if attr, defined := content.Attributes["version"]; defined {
+					var version string
+					valDiags := gohcl.DecodeExpression(attr.Expr, nil, &version)
+					diags = append(diags, valDiags...)
+					mc.Version = version
+				}
+
+			default:
+				// Should never happen because our cases above should be
+				// exhaustive for our schema.
+				panic(fmt.Errorf("unhandled block type %q", block.Type))
+			}
+		}
+	}
+
+	return mod, diagnosticsHCL(diags)
+}

vendor/github.com/hashicorp/terraform-config-inspect/tfconfig/load_legacy.go

@@ -0,0 +1,322 @@
+package tfconfig
+
+import (
+	"io/ioutil"
+	"strings"
+
+	legacyhcl "github.com/hashicorp/hcl"
+	legacyast "github.com/hashicorp/hcl/hcl/ast"
+)
+
+func loadModuleLegacyHCL(dir string) (*Module, Diagnostics) {
+	// This implementation is intentionally more quick-and-dirty than the
+	// main loader. In particular, it doesn't bother to keep careful track
+	// of multiple error messages because we always fall back on returning
+	// the main parser's error message if our fallback parsing produces
+	// an error, and thus the errors here are not seen by the end-caller.
+	mod := newModule(dir)
+
+	primaryPaths, diags := dirFiles(dir)
+	if diags.HasErrors() {
+		return mod, diagnosticsHCL(diags)
+	}
+
+	for _, filename := range primaryPaths {
+		src, err := ioutil.ReadFile(filename)
+		if err != nil {
+			return mod, diagnosticsErrorf("Error reading %s: %s", filename, err)
+		}
+
+		hclRoot, err := legacyhcl.Parse(string(src))
+		if err != nil {
+			return mod, diagnosticsErrorf("Error parsing %s: %s", filename, err)
+		}
+
+		list, ok := hclRoot.Node.(*legacyast.ObjectList)
+		if !ok {
+			return mod, diagnosticsErrorf("Error parsing %s: no root object", filename)
+		}
+
+		for _, item := range list.Filter("terraform").Items {
+			if len(item.Keys) > 0 {
+				item = &legacyast.ObjectItem{
+					Val: &legacyast.ObjectType{
+						List: &legacyast.ObjectList{
+							Items: []*legacyast.ObjectItem{item},
+						},
+					},
+				}
+			}
+
+			type TerraformBlock struct {
+				RequiredVersion string `hcl:"required_version"`
+			}
+			var block TerraformBlock
+			err = legacyhcl.DecodeObject(&block, item.Val)
+			if err != nil {
+				return nil, diagnosticsErrorf("terraform block: %s", err)
+			}
+
+			if block.RequiredVersion != "" {
+				mod.RequiredCore = append(mod.RequiredCore, block.RequiredVersion)
+			}
+		}
+
+		if vars := list.Filter("variable"); len(vars.Items) > 0 {
+			vars = vars.Children()
+			type VariableBlock struct {
+				Type        string `hcl:"type"`
+				Default     interface{}
+				Description string
+				Fields      []string `hcl:",decodedFields"`
+			}
+
+			for _, item := range vars.Items {
+				unwrapLegacyHCLObjectKeysFromJSON(item, 1)
+
+				if len(item.Keys) != 1 {
+					return nil, diagnosticsErrorf("variable block at %s has no label", item.Pos())
+				}
+
+				name := item.Keys[0].Token.Value().(string)
+
+				var block VariableBlock
+				err := legacyhcl.DecodeObject(&block, item.Val)
+				if err != nil {
+					return nil, diagnosticsErrorf("invalid variable block at %s: %s", item.Pos(), err)
+				}
+
+				// Clean up legacy HCL decoding ambiguity by unwrapping list of maps
+				if ms, ok := block.Default.([]map[string]interface{}); ok {
+					def := make(map[string]interface{})
+					for _, m := range ms {
+						for k, v := range m {
+							def[k] = v
+						}
+					}
+					block.Default = def
+				}
+
+				v := &Variable{
+					Name:        name,
+					Type:        block.Type,
+					Description: block.Description,
+					Default:     block.Default,
+					Pos:         sourcePosLegacyHCL(item.Pos(), filename),
+				}
+				if _, exists := mod.Variables[name]; exists {
+					return nil, diagnosticsErrorf("duplicate variable block for %q", name)
+				}
+				mod.Variables[name] = v
+
+			}
+		}
+
+		if outputs := list.Filter("output"); len(outputs.Items) > 0 {
+			outputs = outputs.Children()
+			type OutputBlock struct {
+				Description string
+			}
+
+			for _, item := range outputs.Items {
+				unwrapLegacyHCLObjectKeysFromJSON(item, 1)
+
+				if len(item.Keys) != 1 {
+					return nil, diagnosticsErrorf("output block at %s has no label", item.Pos())
+				}
+
+				name := item.Keys[0].Token.Value().(string)
+
+				var block OutputBlock
+				err := legacyhcl.DecodeObject(&block, item.Val)
+				if err != nil {
+					return nil, diagnosticsErrorf("invalid output block at %s: %s", item.Pos(), err)
+				}
+
+				o := &Output{
+					Name:        name,
+					Description: block.Description,
+					Pos:         sourcePosLegacyHCL(item.Pos(), filename),
+				}
+				if _, exists := mod.Outputs[name]; exists {
+					return nil, diagnosticsErrorf("duplicate output block for %q", name)
+				}
+				mod.Outputs[name] = o
+			}
+		}
+
+		for _, blockType := range []string{"resource", "data"} {
+			if resources := list.Filter(blockType); len(resources.Items) > 0 {
+				resources = resources.Children()
+				type ResourceBlock struct {
+					Provider string
+				}
+
+				for _, item := range resources.Items {
+					unwrapLegacyHCLObjectKeysFromJSON(item, 2)
+
+					if len(item.Keys) != 2 {
+						return nil, diagnosticsErrorf("resource block at %s has wrong label count", item.Pos())
+					}
+
+					typeName := item.Keys[0].Token.Value().(string)
+					name := item.Keys[1].Token.Value().(string)
+					var mode ResourceMode
+					var rMap map[string]*Resource
+					switch blockType {
+					case "resource":
+						mode = ManagedResourceMode
+						rMap = mod.ManagedResources
+					case "data":
+						mode = DataResourceMode
+						rMap = mod.DataResources
+					}
+
+					var block ResourceBlock
+					err := legacyhcl.DecodeObject(&block, item.Val)
+					if err != nil {
+						return nil, diagnosticsErrorf("invalid resource block at %s: %s", item.Pos(), err)
+					}
+
+					var providerName, providerAlias string
+					if dotPos := strings.IndexByte(block.Provider, '.'); dotPos != -1 {
+						providerName = block.Provider[:dotPos]
+						providerAlias = block.Provider[dotPos+1:]
+					} else {
+						providerName = block.Provider
+					}
+					if providerName == "" {
+						providerName = resourceTypeDefaultProviderName(typeName)
+					}
+
+					r := &Resource{
+						Mode: mode,
+						Type: typeName,
+						Name: name,
+						Provider: ProviderRef{
+							Name:  providerName,
+							Alias: providerAlias,
+						},
+						Pos: sourcePosLegacyHCL(item.Pos(), filename),
+					}
+					key := r.MapKey()
+					if _, exists := rMap[key]; exists {
+						return nil, diagnosticsErrorf("duplicate resource block for %q", key)
+					}
+					rMap[key] = r
+				}
+			}
+
+		}
+
+		if moduleCalls := list.Filter("module"); len(moduleCalls.Items) > 0 {
+			moduleCalls = moduleCalls.Children()
+			type ModuleBlock struct {
+				Source  string
+				Version string
+			}
+
+			for _, item := range moduleCalls.Items {
+				unwrapLegacyHCLObjectKeysFromJSON(item, 1)
+
+				if len(item.Keys) != 1 {
+					return nil, diagnosticsErrorf("module block at %s has no label", item.Pos())
+				}
+
+				name := item.Keys[0].Token.Value().(string)
+
+				var block ModuleBlock
+				err := legacyhcl.DecodeObject(&block, item.Val)
+				if err != nil {
+					return nil, diagnosticsErrorf("module block at %s: %s", item.Pos(), err)
+				}
+
+				mc := &ModuleCall{
+					Name:    name,
+					Source:  block.Source,
+					Version: block.Version,
+					Pos:     sourcePosLegacyHCL(item.Pos(), filename),
+				}
+				if _, exists := mod.ModuleCalls[name]; exists {
+					return nil, diagnosticsErrorf("duplicate module block for %q", name)
+				}
+				mod.ModuleCalls[name] = mc
+			}
+		}
+
+		if providerConfigs := list.Filter("provider"); len(providerConfigs.Items) > 0 {
+			providerConfigs = providerConfigs.Children()
+			type ProviderBlock struct {
+				Version string
+			}
+
+			for _, item := range providerConfigs.Items {
+				unwrapLegacyHCLObjectKeysFromJSON(item, 1)
+
+				if len(item.Keys) != 1 {
+					return nil, diagnosticsErrorf("provider block at %s has no label", item.Pos())
+				}
+
+				name := item.Keys[0].Token.Value().(string)
+
+				var block ProviderBlock
+				err := legacyhcl.DecodeObject(&block, item.Val)
+				if err != nil {
+					return nil, diagnosticsErrorf("invalid provider block at %s: %s", item.Pos(), err)
+				}
+
+				if block.Version != "" {
+					mod.RequiredProviders[name] = append(mod.RequiredProviders[name], block.Version)
+				}
+
+				// Even if there wasn't an explicit version required, we still
+				// need an entry in our map to signal the unversioned dependency.
+				if _, exists := mod.RequiredProviders[name]; !exists {
+					mod.RequiredProviders[name] = []string{}
+				}
+
+			}
+		}
+	}
+
+	return mod, nil
+}
+
+// unwrapLegacyHCLObjectKeysFromJSON cleans up an edge case that can occur when
+// parsing JSON as input: if we're parsing JSON then directly nested
+// items will show up as additional "keys".
+//
+// For objects that expect a fixed number of keys, this breaks the
+// decoding process. This function unwraps the object into what it would've
+// looked like if it came directly from HCL by specifying the number of keys
+// you expect.
+//
+// Example:
+//
+// { "foo": { "baz": {} } }
+//
+// Will show up with Keys being: []string{"foo", "baz"}
+// when we really just want the first two. This function will fix this.
+func unwrapLegacyHCLObjectKeysFromJSON(item *legacyast.ObjectItem, depth int) {
+	if len(item.Keys) > depth && item.Keys[0].Token.JSON {
+		for len(item.Keys) > depth {
+			// Pop off the last key
+			n := len(item.Keys)
+			key := item.Keys[n-1]
+			item.Keys[n-1] = nil
+			item.Keys = item.Keys[:n-1]
+
+			// Wrap our value in a list
+			item.Val = &legacyast.ObjectType{
+				List: &legacyast.ObjectList{
+					Items: []*legacyast.ObjectItem{
+						&legacyast.ObjectItem{
+							Keys: []*legacyast.ObjectKey{key},
+							Val:  item.Val,
+						},
+					},
+				},
+			}
+		}
+	}
+}

vendor/github.com/hashicorp/terraform-config-inspect/tfconfig/module.go

@@ -0,0 +1,35 @@
+package tfconfig
+
+// Module is the top-level type representing a parsed and processed Terraform
+// module.
+type Module struct {
+	// Path is the local filesystem directory where the module was loaded from.
+	Path string `json:"path"`
+
+	Variables map[string]*Variable `json:"variables"`
+	Outputs   map[string]*Output   `json:"outputs"`
+
+	RequiredCore      []string            `json:"required_core,omitempty"`
+	RequiredProviders map[string][]string `json:"required_providers"`
+
+	ManagedResources map[string]*Resource   `json:"managed_resources"`
+	DataResources    map[string]*Resource   `json:"data_resources"`
+	ModuleCalls      map[string]*ModuleCall `json:"module_calls"`
+
+	// Diagnostics records any errors and warnings that were detected during
+	// loading, primarily for inclusion in serialized forms of the module
+	// since this slice is also returned as a second argument from LoadModule.
+	Diagnostics Diagnostics `json:"diagnostics,omitempty"`
+}
+
+func newModule(path string) *Module {
+	return &Module{
+		Path:              path,
+		Variables:         make(map[string]*Variable),
+		Outputs:           make(map[string]*Output),
+		RequiredProviders: make(map[string][]string),
+		ManagedResources:  make(map[string]*Resource),
+		DataResources:     make(map[string]*Resource),
+		ModuleCalls:       make(map[string]*ModuleCall),
+	}
+}

vendor/github.com/hashicorp/terraform-config-inspect/tfconfig/module_call.go

@@ -0,0 +1,11 @@
+package tfconfig
+
+// ModuleCall represents a "module" block within a module. That is, a
+// declaration of a child module from inside its parent.
+type ModuleCall struct {
+	Name    string `json:"name"`
+	Source  string `json:"source"`
+	Version string `json:"version,omitempty"`
+
+	Pos SourcePos `json:"pos"`
+}

vendor/github.com/hashicorp/terraform-config-inspect/tfconfig/output.go

@@ -0,0 +1,9 @@
+package tfconfig
+
+// Output represents a single output from a Terraform module.
+type Output struct {
+	Name        string `json:"name"`
+	Description string `json:"description,omitempty"`
+
+	Pos SourcePos `json:"pos"`
+}

vendor/github.com/hashicorp/terraform-config-inspect/tfconfig/provider_ref.go

@@ -0,0 +1,9 @@
+package tfconfig
+
+// ProviderRef is a reference to a provider configuration within a module.
+// It represents the contents of a "provider" argument in a resource, or
+// a value in the "providers" map for a module call.
+type ProviderRef struct {
+	Name  string `json:"name"`
+	Alias string `json:"alias,omitempty"` // Empty if the default provider configuration is referenced
+}

vendor/github.com/hashicorp/terraform-config-inspect/tfconfig/resource.go

@@ -0,0 +1,64 @@
+package tfconfig
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+// Resource represents a single "resource" or "data" block within a module.
+type Resource struct {
+	Mode ResourceMode `json:"mode"`
+	Type string       `json:"type"`
+	Name string       `json:"name"`
+
+	Provider ProviderRef `json:"provider"`
+
+	Pos SourcePos `json:"pos"`
+}
+
+// MapKey returns a string that can be used to uniquely identify the receiver
+// in a map[string]*Resource.
+func (r *Resource) MapKey() string {
+	switch r.Mode {
+	case ManagedResourceMode:
+		return fmt.Sprintf("%s.%s", r.Type, r.Name)
+	case DataResourceMode:
+		return fmt.Sprintf("data.%s.%s", r.Type, r.Name)
+	default:
+		// should never happen
+		return fmt.Sprintf("[invalid_mode!].%s.%s", r.Type, r.Name)
+	}
+}
+
+// ResourceMode represents the "mode" of a resource, which is used to
+// distinguish between managed resources ("resource" blocks in config) and
+// data resources ("data" blocks in config).
+type ResourceMode rune
+
+const InvalidResourceMode ResourceMode = 0
+const ManagedResourceMode ResourceMode = 'M'
+const DataResourceMode ResourceMode = 'D'
+
+func (m ResourceMode) String() string {
+	switch m {
+	case ManagedResourceMode:
+		return "managed"
+	case DataResourceMode:
+		return "data"
+	default:
+		return ""
+	}
+}
+
+// MarshalJSON implements encoding/json.Marshaler.
+func (m ResourceMode) MarshalJSON() ([]byte, error) {
+	return []byte(strconv.Quote(m.String())), nil
+}
+
+func resourceTypeDefaultProviderName(typeName string) string {
+	if underPos := strings.IndexByte(typeName, '_'); underPos != -1 {
+		return typeName[:underPos]
+	}
+	return typeName
+}

vendor/github.com/hashicorp/terraform-config-inspect/tfconfig/schema.go

@@ -0,0 +1,106 @@
+package tfconfig
+
+import (
+	"github.com/hashicorp/hcl2/hcl"
+)
+
+var rootSchema = &hcl.BodySchema{
+	Blocks: []hcl.BlockHeaderSchema{
+		{
+			Type:       "terraform",
+			LabelNames: nil,
+		},
+		{
+			Type:       "variable",
+			LabelNames: []string{"name"},
+		},
+		{
+			Type:       "output",
+			LabelNames: []string{"name"},
+		},
+		{
+			Type:       "provider",
+			LabelNames: []string{"name"},
+		},
+		{
+			Type:       "resource",
+			LabelNames: []string{"type", "name"},
+		},
+		{
+			Type:       "data",
+			LabelNames: []string{"type", "name"},
+		},
+		{
+			Type:       "module",
+			LabelNames: []string{"name"},
+		},
+	},
+}
+
+var terraformBlockSchema = &hcl.BodySchema{
+	Attributes: []hcl.AttributeSchema{
+		{
+			Name: "required_version",
+		},
+	},
+	Blocks: []hcl.BlockHeaderSchema{
+		{
+			Type: "required_providers",
+		},
+	},
+}
+
+var providerConfigSchema = &hcl.BodySchema{
+	Attributes: []hcl.AttributeSchema{
+		{
+			Name: "version",
+		},
+		{
+			Name: "alias",
+		},
+	},
+}
+
+var variableSchema = &hcl.BodySchema{
+	Attributes: []hcl.AttributeSchema{
+		{
+			Name: "type",
+		},
+		{
+			Name: "description",
+		},
+		{
+			Name: "default",
+		},
+	},
+}
+
+var outputSchema = &hcl.BodySchema{
+	Attributes: []hcl.AttributeSchema{
+		{
+			Name: "description",
+		},
+	},
+}
+
+var moduleCallSchema = &hcl.BodySchema{
+	Attributes: []hcl.AttributeSchema{
+		{
+			Name: "source",
+		},
+		{
+			Name: "version",
+		},
+		{
+			Name: "providers",
+		},
+	},
+}
+
+var resourceSchema = &hcl.BodySchema{
+	Attributes: []hcl.AttributeSchema{
+		{
+			Name: "provider",
+		},
+	},
+}

vendor/github.com/hashicorp/terraform-config-inspect/tfconfig/source_pos.go

@@ -0,0 +1,50 @@
+package tfconfig
+
+import (
+	legacyhcltoken "github.com/hashicorp/hcl/hcl/token"
+	"github.com/hashicorp/hcl2/hcl"
+)
+
+// SourcePos is a pointer to a particular location in a source file.
+//
+// This type is embedded into other structs to allow callers to locate the
+// definition of each described module element. The SourcePos of an element
+// is usually the first line of its definition, although the definition can
+// be a little "fuzzy" with JSON-based config files.
+type SourcePos struct {
+	Filename string `json:"filename"`
+	Line     int    `json:"line"`
+}
+
+func sourcePos(filename string, line int) SourcePos {
+	return SourcePos{
+		Filename: filename,
+		Line:     line,
+	}
+}
+
+func sourcePosHCL(rng hcl.Range) SourcePos {
+	// We intentionally throw away the column information here because
+	// current and legacy HCL both disagree on the definition of a column
+	// and so a line-only reference is the best granularity we can do
+	// such that the result is consistent between both parsers.
+	return SourcePos{
+		Filename: rng.Filename,
+		Line:     rng.Start.Line,
+	}
+}
+
+func sourcePosLegacyHCL(pos legacyhcltoken.Pos, filename string) SourcePos {
+	useFilename := pos.Filename
+	// We'll try to use the filename given in legacy HCL position, but
+	// in practice there's no way to actually get this populated via
+	// the HCL API so it's usually empty except in some specialized
+	// situations, such as positions in error objects.
+	if useFilename == "" {
+		useFilename = filename
+	}
+	return SourcePos{
+		Filename: useFilename,
+		Line:     pos.Line,
+	}
+}

vendor/github.com/hashicorp/terraform-config-inspect/tfconfig/variable.go

@@ -0,0 +1,16 @@
+package tfconfig
+
+// Variable represents a single variable from a Terraform module.
+type Variable struct {
+	Name        string `json:"name"`
+	Type        string `json:"type,omitempty"`
+	Description string `json:"description,omitempty"`
+
+	// Default is an approximate representation of the default value in
+	// the native Go type system. The conversion from the value given in
+	// configuration may be slightly lossy. Only values that can be
+	// serialized by json.Marshal will be included here.
+	Default interface{} `json:"default,omitempty"`
+
+	Pos SourcePos `json:"pos"`
+}

vendor/modules.txt

@@ -340,7 +340,7 @@ github.com/hashicorp/go-tfe
 github.com/hashicorp/go-uuid
 # github.com/hashicorp/go-version v1.0.0
 github.com/hashicorp/go-version
-# github.com/hashicorp/hcl v0.0.0-20170504190234-a4b07c25de5f
+# github.com/hashicorp/hcl v1.0.0
 github.com/hashicorp/hcl
 github.com/hashicorp/hcl/hcl/ast
 github.com/hashicorp/hcl/hcl/parser
@@ -372,6 +372,8 @@ github.com/hashicorp/hil/scanner
 github.com/hashicorp/logutils
 # github.com/hashicorp/serf v0.0.0-20160124182025-e4ec8cc423bb
 github.com/hashicorp/serf/coordinate
+# github.com/hashicorp/terraform-config-inspect v0.0.0-20181213005350-314d8affa1db
+github.com/hashicorp/terraform-config-inspect/tfconfig
 # github.com/hashicorp/vault v0.0.0-20161029210149-9a60bf2a50e4
 github.com/hashicorp/vault/helper/pgpkeys
 github.com/hashicorp/vault/helper/jsonutil