MINOR: global: add support for default-path

Author: George Vine

parsers/default-path.go

@@ -0,0 +1,70 @@
+/*
+Copyright 2022 HAProxy Technologies
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package parsers
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/haproxytech/config-parser/v4/common"
+	"github.com/haproxytech/config-parser/v4/errors"
+	"github.com/haproxytech/config-parser/v4/types"
+)
+
+type DefaultPath struct {
+	data        *types.DefaultPath
+	preComments []string // comments that appear before the actual line
+}
+
+/*
+default-path { current | config | parent | origin <path> }
+*/
+func (d *DefaultPath) Parse(line string, parts []string, comment string) (string, error) {
+	if len(parts) > 1 && parts[0] == "default-path" &&
+		(parts[1] == "current" || parts[1] == "config" || parts[1] == "parent" || parts[1] == "origin") {
+		data := &types.DefaultPath{
+			Type:    parts[1],
+			Comment: comment,
+		}
+		if parts[1] == "origin" {
+			if len(parts) != 3 {
+				return "", errors.ErrInvalidData
+			}
+			data.Path = parts[2]
+		}
+		d.data = data
+		return "", nil
+	}
+	return "", &errors.ParseError{Parser: "default-path", Line: line}
+}
+
+func (d *DefaultPath) Result() ([]common.ReturnResultLine, error) {
+	if d.data == nil {
+		return nil, errors.ErrFetch
+	}
+	var sb strings.Builder
+	fmt.Fprint(&sb, "default-path ", d.data.Type)
+	if d.data.Type == "origin" {
+		fmt.Fprint(&sb, " ", d.data.Path)
+	}
+	return []common.ReturnResultLine{
+		{
+			Data:    sb.String(),
+			Comment: d.data.Comment,
+		},
+	}, nil
+}

parsers/default-path_generated.go

@@ -212,6 +212,7 @@ func (p *configParser) getGlobalParser() *Parsers {
 	addParser(parser, &sequence, &simple.ArrayKeyValue{Name: "setenv"})
 	addParser(parser, &sequence, &simple.StringSlice{Name: "unsetenv"})
 	addParser(parser, &sequence, &parsers.Daemon{})
+	addParser(parser, &sequence, &parsers.DefaultPath{})
 	addParser(parser, &sequence, &simple.String{Name: "localpeer"})
 	addParser(parser, &sequence, &simple.Word{Name: "chroot"})
 	addParser(parser, &sequence, &simple.Number{Name: "uid"})
@@ -328,7 +329,6 @@ func (p *configParser) getGlobalParser() *Parsers {
 	addParser(parser, &sequence, &simple.String{Name: "wurfl-information-list-separator"})
 	addParser(parser, &sequence, &simple.String{Name: "wurfl-patch-file"})
 	addParser(parser, &sequence, &simple.Number{Name: "wurfl-cache-size"})
-	addParser(parser, &sequence, &simple.String{Name: "default-path"})
 	addParser(parser, &sequence, &simple.String{Name: "description"})
 	addParser(parser, &sequence, &simple.Enabled{Name: "expose-experimental-directives"})
 	addParser(parser, &sequence, &simple.String{Name: "grace"})

section-parsers.go

@@ -1474,3 +1474,22 @@ type NumaCPUMapping struct {
 	NoOption bool
 	Comment  string
 }
+
+//sections:global
+//name:default-path
+//no:parse
+//test:ok:default-path current
+//test:ok:default-path config
+//test:ok:default-path parent
+//test:ok:default-path origin /some/path
+//test:ok:default-path current # comment
+//test:ok:default-path origin /some/path # comment
+//test:fail:default-path
+//test:fail:option default-path unrecognized
+//test:fail:option default-path origin
+//test:fail:option default-path origin # comment
+type DefaultPath struct {
+	Type    string
+	Path    string
+	Comment string
+}