Add generated file

This PR adds generated files under pkg/client and vendor folder.

vendor/golang.org/x/tools/godoc/spec.go

@@ -0,0 +1,179 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package godoc
+
+// This file contains the mechanism to "linkify" html source
+// text containing EBNF sections (as found in go_spec.html).
+// The result is the input source text with the EBNF sections
+// modified such that identifiers are linked to the respective
+// definitions.
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"text/scanner"
+)
+
+type ebnfParser struct {
+	out     io.Writer // parser output
+	src     []byte    // parser input
+	scanner scanner.Scanner
+	prev    int    // offset of previous token
+	pos     int    // offset of current token
+	tok     rune   // one token look-ahead
+	lit     string // token literal
+}
+
+func (p *ebnfParser) flush() {
+	p.out.Write(p.src[p.prev:p.pos])
+	p.prev = p.pos
+}
+
+func (p *ebnfParser) next() {
+	p.tok = p.scanner.Scan()
+	p.pos = p.scanner.Position.Offset
+	p.lit = p.scanner.TokenText()
+}
+
+func (p *ebnfParser) printf(format string, args ...interface{}) {
+	p.flush()
+	fmt.Fprintf(p.out, format, args...)
+}
+
+func (p *ebnfParser) errorExpected(msg string) {
+	p.printf(`<span class="highlight">error: expected %s, found %s</span>`, msg, scanner.TokenString(p.tok))
+}
+
+func (p *ebnfParser) expect(tok rune) {
+	if p.tok != tok {
+		p.errorExpected(scanner.TokenString(tok))
+	}
+	p.next() // make progress in any case
+}
+
+func (p *ebnfParser) parseIdentifier(def bool) {
+	if p.tok == scanner.Ident {
+		name := p.lit
+		if def {
+			p.printf(`<a id="%s">%s</a>`, name, name)
+		} else {
+			p.printf(`<a href="#%s" class="noline">%s</a>`, name, name)
+		}
+		p.prev += len(name) // skip identifier when printing next time
+		p.next()
+	} else {
+		p.expect(scanner.Ident)
+	}
+}
+
+func (p *ebnfParser) parseTerm() bool {
+	switch p.tok {
+	case scanner.Ident:
+		p.parseIdentifier(false)
+
+	case scanner.String, scanner.RawString:
+		p.next()
+		const ellipsis = '…' // U+2026, the horizontal ellipsis character
+		if p.tok == ellipsis {
+			p.next()
+			p.expect(scanner.String)
+		}
+
+	case '(':
+		p.next()
+		p.parseExpression()
+		p.expect(')')
+
+	case '[':
+		p.next()
+		p.parseExpression()
+		p.expect(']')
+
+	case '{':
+		p.next()
+		p.parseExpression()
+		p.expect('}')
+
+	default:
+		return false // no term found
+	}
+
+	return true
+}
+
+func (p *ebnfParser) parseSequence() {
+	if !p.parseTerm() {
+		p.errorExpected("term")
+	}
+	for p.parseTerm() {
+	}
+}
+
+func (p *ebnfParser) parseExpression() {
+	for {
+		p.parseSequence()
+		if p.tok != '|' {
+			break
+		}
+		p.next()
+	}
+}
+
+func (p *ebnfParser) parseProduction() {
+	p.parseIdentifier(true)
+	p.expect('=')
+	if p.tok != '.' {
+		p.parseExpression()
+	}
+	p.expect('.')
+}
+
+func (p *ebnfParser) parse(out io.Writer, src []byte) {
+	// initialize ebnfParser
+	p.out = out
+	p.src = src
+	p.scanner.Init(bytes.NewBuffer(src))
+	p.next() // initializes pos, tok, lit
+
+	// process source
+	for p.tok != scanner.EOF {
+		p.parseProduction()
+	}
+	p.flush()
+}
+
+// Markers around EBNF sections
+var (
+	openTag  = []byte(`<pre class="ebnf">`)
+	closeTag = []byte(`</pre>`)
+)
+
+func Linkify(out io.Writer, src []byte) {
+	for len(src) > 0 {
+		// i: beginning of EBNF text (or end of source)
+		i := bytes.Index(src, openTag)
+		if i < 0 {
+			i = len(src) - len(openTag)
+		}
+		i += len(openTag)
+
+		// j: end of EBNF text (or end of source)
+		j := bytes.Index(src[i:], closeTag) // close marker
+		if j < 0 {
+			j = len(src) - i
+		}
+		j += i
+
+		// write text before EBNF
+		out.Write(src[0:i])
+		// process EBNF
+		var p ebnfParser
+		p.parse(out, src[i:j])
+
+		// advance
+		src = src[j:]
+	}
+}