Update dependencies (#1784)

vendor/github.com/graph-gophers/graphql-go/internal/common/blockstring.go

@@ -0,0 +1,103 @@
+// MIT License
+//
+// Copyright (c) 2019 GraphQL Contributors
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+// This implementation has been adapted from the graphql-js reference implementation
+// https://github.com/graphql/graphql-js/blob/5eb7c4ded7ceb83ac742149cbe0dae07a8af9a30/src/language/blockString.js
+// which is released under the MIT License above.
+
+package common
+
+import (
+	"strings"
+)
+
+// Produces the value of a block string from its parsed raw value, similar to
+// CoffeeScript's block string, Python's docstring trim or Ruby's strip_heredoc.
+//
+// This implements the GraphQL spec's BlockStringValue() static algorithm.
+func blockString(raw string) string {
+	lines := strings.Split(raw, "\n")
+
+	// Remove common indentation from all lines except the first (which has none)
+	ind := blockStringIndentation(lines)
+	if ind > 0 {
+		for i := 1; i < len(lines); i++ {
+			l := lines[i]
+			if len(l) < ind {
+				lines[i] = ""
+				continue
+			}
+			lines[i] = l[ind:]
+		}
+	}
+
+	// Remove leading and trailing blank lines
+	trimStart := 0
+	for i := 0; i < len(lines) && isBlank(lines[i]); i++ {
+		trimStart++
+	}
+	lines = lines[trimStart:]
+	trimEnd := 0
+	for i := len(lines) - 1; i > 0 && isBlank(lines[i]); i-- {
+		trimEnd++
+	}
+	lines = lines[:len(lines)-trimEnd]
+
+	return strings.Join(lines, "\n")
+}
+
+func blockStringIndentation(lines []string) int {
+	var commonIndent *int
+	for i := 1; i < len(lines); i++ {
+		l := lines[i]
+		indent := leadingWhitespace(l)
+		if indent == len(l) {
+			// don't consider blank/empty lines
+			continue
+		}
+		if indent == 0 {
+			return 0
+		}
+		if commonIndent == nil || indent < *commonIndent {
+			commonIndent = &indent
+		}
+	}
+	if commonIndent == nil {
+		return 0
+	}
+	return *commonIndent
+}
+
+func isBlank(s string) bool {
+	return len(s) == 0 || leadingWhitespace(s) == len(s)
+}
+
+func leadingWhitespace(s string) int {
+	i := 0
+	for _, r := range s {
+		if r != '\t' && r != ' ' {
+			break
+		}
+		i++
+	}
+	return i
+}

vendor/github.com/graph-gophers/graphql-go/internal/common/directive.go

@@ -0,0 +1,18 @@
+package common
+
+import "github.com/graph-gophers/graphql-go/types"
+
+func ParseDirectives(l *Lexer) types.DirectiveList {
+	var directives types.DirectiveList
+	for l.Peek() == '@' {
+		l.ConsumeToken('@')
+		d := &types.Directive{}
+		d.Name = l.ConsumeIdentWithLoc()
+		d.Name.Loc.Column--
+		if l.Peek() == '(' {
+			d.Arguments = ParseArgumentList(l)
+		}
+		directives = append(directives, d)
+	}
+	return directives
+}

vendor/github.com/graph-gophers/graphql-go/internal/common/lexer.go

@@ -0,0 +1,229 @@
+package common
+
+import (
+	"bytes"
+	"fmt"
+	"strconv"
+	"strings"
+	"text/scanner"
+
+	"github.com/graph-gophers/graphql-go/errors"
+	"github.com/graph-gophers/graphql-go/types"
+)
+
+type syntaxError string
+
+type Lexer struct {
+	sc                    *scanner.Scanner
+	next                  rune
+	comment               bytes.Buffer
+	useStringDescriptions bool
+}
+
+type Ident struct {
+	Name string
+	Loc  errors.Location
+}
+
+func NewLexer(s string, useStringDescriptions bool) *Lexer {
+	sc := &scanner.Scanner{
+		Mode: scanner.ScanIdents | scanner.ScanInts | scanner.ScanFloats | scanner.ScanStrings,
+	}
+	sc.Init(strings.NewReader(s))
+
+	l := Lexer{sc: sc, useStringDescriptions: useStringDescriptions}
+	l.sc.Error = l.CatchScannerError
+
+	return &l
+}
+
+func (l *Lexer) CatchSyntaxError(f func()) (errRes *errors.QueryError) {
+	defer func() {
+		if err := recover(); err != nil {
+			if err, ok := err.(syntaxError); ok {
+				errRes = errors.Errorf("syntax error: %s", err)
+				errRes.Locations = []errors.Location{l.Location()}
+				return
+			}
+			panic(err)
+		}
+	}()
+
+	f()
+	return
+}
+
+func (l *Lexer) Peek() rune {
+	return l.next
+}
+
+// ConsumeWhitespace consumes whitespace and tokens equivalent to whitespace (e.g. commas and comments).
+//
+// Consumed comment characters will build the description for the next type or field encountered.
+// The description is available from `DescComment()`, and will be reset every time `ConsumeWhitespace()` is
+// executed unless l.useStringDescriptions is set.
+func (l *Lexer) ConsumeWhitespace() {
+	l.comment.Reset()
+	for {
+		l.next = l.sc.Scan()
+
+		if l.next == ',' {
+			// Similar to white space and line terminators, commas (',') are used to improve the
+			// legibility of source text and separate lexical tokens but are otherwise syntactically and
+			// semantically insignificant within GraphQL documents.
+			//
+			// http://facebook.github.io/graphql/draft/#sec-Insignificant-Commas
+			continue
+		}
+
+		if l.next == '#' {
+			// GraphQL source documents may contain single-line comments, starting with the '#' marker.
+			//
+			// A comment can contain any Unicode code point except `LineTerminator` so a comment always
+			// consists of all code points starting with the '#' character up to but not including the
+			// line terminator.
+			l.consumeComment()
+			continue
+		}
+
+		break
+	}
+}
+
+// consumeDescription optionally consumes a description based on the June 2018 graphql spec if any are present.
+//
+// Single quote strings are also single line. Triple quote strings can be multi-line. Triple quote strings
+// whitespace trimmed on both ends.
+// If a description is found, consume any following comments as well
+//
+// http://facebook.github.io/graphql/June2018/#sec-Descriptions
+func (l *Lexer) consumeDescription() string {
+	// If the next token is not a string, we don't consume it
+	if l.next != scanner.String {
+		return ""
+	}
+	// Triple quote string is an empty "string" followed by an open quote due to the way the parser treats strings as one token
+	var desc string
+	if l.sc.Peek() == '"' {
+		desc = l.consumeTripleQuoteComment()
+	} else {
+		desc = l.consumeStringComment()
+	}
+	l.ConsumeWhitespace()
+	return desc
+}
+
+func (l *Lexer) ConsumeIdent() string {
+	name := l.sc.TokenText()
+	l.ConsumeToken(scanner.Ident)
+	return name
+}
+
+func (l *Lexer) ConsumeIdentWithLoc() types.Ident {
+	loc := l.Location()
+	name := l.sc.TokenText()
+	l.ConsumeToken(scanner.Ident)
+	return types.Ident{Name: name, Loc: loc}
+}
+
+func (l *Lexer) ConsumeKeyword(keyword string) {
+	if l.next != scanner.Ident || l.sc.TokenText() != keyword {
+		l.SyntaxError(fmt.Sprintf("unexpected %q, expecting %q", l.sc.TokenText(), keyword))
+	}
+	l.ConsumeWhitespace()
+}
+
+func (l *Lexer) ConsumeLiteral() *types.PrimitiveValue {
+	lit := &types.PrimitiveValue{Type: l.next, Text: l.sc.TokenText()}
+	l.ConsumeWhitespace()
+	return lit
+}
+
+func (l *Lexer) ConsumeToken(expected rune) {
+	if l.next != expected {
+		l.SyntaxError(fmt.Sprintf("unexpected %q, expecting %s", l.sc.TokenText(), scanner.TokenString(expected)))
+	}
+	l.ConsumeWhitespace()
+}
+
+func (l *Lexer) DescComment() string {
+	comment := l.comment.String()
+	desc := l.consumeDescription()
+	if l.useStringDescriptions {
+		return desc
+	}
+	return comment
+}
+
+func (l *Lexer) SyntaxError(message string) {
+	panic(syntaxError(message))
+}
+
+func (l *Lexer) Location() errors.Location {
+	return errors.Location{
+		Line:   l.sc.Line,
+		Column: l.sc.Column,
+	}
+}
+
+func (l *Lexer) consumeTripleQuoteComment() string {
+	l.next = l.sc.Next()
+	if l.next != '"' {
+		panic("consumeTripleQuoteComment used in wrong context: no third quote?")
+	}
+
+	var buf bytes.Buffer
+	var numQuotes int
+	for {
+		l.next = l.sc.Next()
+		if l.next == '"' {
+			numQuotes++
+		} else {
+			numQuotes = 0
+		}
+		buf.WriteRune(l.next)
+		if numQuotes == 3 || l.next == scanner.EOF {
+			break
+		}
+	}
+	val := buf.String()
+	val = val[:len(val)-numQuotes]
+	return blockString(val)
+}
+
+func (l *Lexer) consumeStringComment() string {
+	val, err := strconv.Unquote(l.sc.TokenText())
+	if err != nil {
+		panic(err)
+	}
+	return val
+}
+
+// consumeComment consumes all characters from `#` to the first encountered line terminator.
+// The characters are appended to `l.comment`.
+func (l *Lexer) consumeComment() {
+	if l.next != '#' {
+		panic("consumeComment used in wrong context")
+	}
+
+	// TODO: count and trim whitespace so we can dedent any following lines.
+	if l.sc.Peek() == ' ' {
+		l.sc.Next()
+	}
+
+	if l.comment.Len() > 0 {
+		l.comment.WriteRune('\n')
+	}
+
+	for {
+		next := l.sc.Next()
+		if next == '\r' || next == '\n' || next == scanner.EOF {
+			break
+		}
+		l.comment.WriteRune(next)
+	}
+}
+
+func (l *Lexer) CatchScannerError(s *scanner.Scanner, msg string) {
+	l.SyntaxError(msg)
+}

vendor/github.com/graph-gophers/graphql-go/internal/common/literals.go

@@ -0,0 +1,58 @@
+package common
+
+import (
+	"text/scanner"
+
+	"github.com/graph-gophers/graphql-go/types"
+)
+
+func ParseLiteral(l *Lexer, constOnly bool) types.Value {
+	loc := l.Location()
+	switch l.Peek() {
+	case '$':
+		if constOnly {
+			l.SyntaxError("variable not allowed")
+			panic("unreachable")
+		}
+		l.ConsumeToken('$')
+		return &types.Variable{Name: l.ConsumeIdent(), Loc: loc}
+
+	case scanner.Int, scanner.Float, scanner.String, scanner.Ident:
+		lit := l.ConsumeLiteral()
+		if lit.Type == scanner.Ident && lit.Text == "null" {
+			return &types.NullValue{Loc: loc}
+		}
+		lit.Loc = loc
+		return lit
+	case '-':
+		l.ConsumeToken('-')
+		lit := l.ConsumeLiteral()
+		lit.Text = "-" + lit.Text
+		lit.Loc = loc
+		return lit
+	case '[':
+		l.ConsumeToken('[')
+		var list []types.Value
+		for l.Peek() != ']' {
+			list = append(list, ParseLiteral(l, constOnly))
+		}
+		l.ConsumeToken(']')
+		return &types.ListValue{Values: list, Loc: loc}
+
+	case '{':
+		l.ConsumeToken('{')
+		var fields []*types.ObjectField
+		for l.Peek() != '}' {
+			name := l.ConsumeIdentWithLoc()
+			l.ConsumeToken(':')
+			value := ParseLiteral(l, constOnly)
+			fields = append(fields, &types.ObjectField{Name: name, Value: value})
+		}
+		l.ConsumeToken('}')
+		return &types.ObjectValue{Fields: fields, Loc: loc}
+
+	default:
+		l.SyntaxError("invalid value")
+		panic("unreachable")
+	}
+}

vendor/github.com/graph-gophers/graphql-go/internal/common/types.go

@@ -0,0 +1,67 @@
+package common
+
+import (
+	"github.com/graph-gophers/graphql-go/errors"
+	"github.com/graph-gophers/graphql-go/types"
+)
+
+func ParseType(l *Lexer) types.Type {
+	t := parseNullType(l)
+	if l.Peek() == '!' {
+		l.ConsumeToken('!')
+		return &types.NonNull{OfType: t}
+	}
+	return t
+}
+
+func parseNullType(l *Lexer) types.Type {
+	if l.Peek() == '[' {
+		l.ConsumeToken('[')
+		ofType := ParseType(l)
+		l.ConsumeToken(']')
+		return &types.List{OfType: ofType}
+	}
+
+	return &types.TypeName{Ident: l.ConsumeIdentWithLoc()}
+}
+
+type Resolver func(name string) types.Type
+
+// ResolveType attempts to resolve a type's name against a resolving function.
+// This function is used when one needs to check if a TypeName exists in the resolver (typically a Schema).
+//
+// In the example below, ResolveType would be used to check if the resolving function
+// returns a valid type for Dimension:
+//
+// type Profile {
+//    picture(dimensions: Dimension): Url
+// }
+//
+// ResolveType recursively unwraps List and NonNull types until a NamedType is reached.
+func ResolveType(t types.Type, resolver Resolver) (types.Type, *errors.QueryError) {
+	switch t := t.(type) {
+	case *types.List:
+		ofType, err := ResolveType(t.OfType, resolver)
+		if err != nil {
+			return nil, err
+		}
+		return &types.List{OfType: ofType}, nil
+	case *types.NonNull:
+		ofType, err := ResolveType(t.OfType, resolver)
+		if err != nil {
+			return nil, err
+		}
+		return &types.NonNull{OfType: ofType}, nil
+	case *types.TypeName:
+		refT := resolver(t.Name)
+		if refT == nil {
+			err := errors.Errorf("Unknown type %q.", t.Name)
+			err.Rule = "KnownTypeNames"
+			err.Locations = []errors.Location{t.Loc}
+			return nil, err
+		}
+		return refT, nil
+	default:
+		return t, nil
+	}
+}

vendor/github.com/graph-gophers/graphql-go/internal/common/values.go

@@ -0,0 +1,37 @@
+package common
+
+import (
+	"github.com/graph-gophers/graphql-go/types"
+)
+
+func ParseInputValue(l *Lexer) *types.InputValueDefinition {
+	p := &types.InputValueDefinition{}
+	p.Loc = l.Location()
+	p.Desc = l.DescComment()
+	p.Name = l.ConsumeIdentWithLoc()
+	l.ConsumeToken(':')
+	p.TypeLoc = l.Location()
+	p.Type = ParseType(l)
+	if l.Peek() == '=' {
+		l.ConsumeToken('=')
+		p.Default = ParseLiteral(l, true)
+	}
+	p.Directives = ParseDirectives(l)
+	return p
+}
+
+func ParseArgumentList(l *Lexer) types.ArgumentList {
+	var args types.ArgumentList
+	l.ConsumeToken('(')
+	for l.Peek() != ')' {
+		name := l.ConsumeIdentWithLoc()
+		l.ConsumeToken(':')
+		value := ParseLiteral(l, false)
+		args = append(args, &types.Argument{
+			Name:  name,
+			Value: value,
+		})
+	}
+	l.ConsumeToken(')')
+	return args
+}