Pull in go-flags, modified to build on Solaris
This commit is contained in:
Jakob Borg
333
github.com/jessevdk/go-flags/ini_private.go
Normal file
333
github.com/jessevdk/go-flags/ini_private.go
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@@ -0,0 +1,333 @@
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package flags
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import (
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"bufio"
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"fmt"
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"io"
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"os"
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"reflect"
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"strings"
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)
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type iniValue struct {
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Name string
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Value string
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}
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type iniSection []iniValue
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type ini map[string]iniSection
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func readFullLine(reader *bufio.Reader) (string, error) {
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var line []byte
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for {
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l, more, err := reader.ReadLine()
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if err != nil {
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return "", err
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}
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if line == nil && !more {
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return string(l), nil
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}
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line = append(line, l...)
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if !more {
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break
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}
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}
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return string(line), nil
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}
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func optionIniName(option *Option) string {
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name := option.tag.Get("_read-ini-name")
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if len(name) != 0 {
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return name
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}
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name = option.tag.Get("ini-name")
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if len(name) != 0 {
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return name
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}
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return option.field.Name
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}
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func writeGroupIni(group *Group, namespace string, writer io.Writer, options IniOptions) {
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var sname string
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if len(namespace) != 0 {
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sname = namespace + "." + group.ShortDescription
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} else {
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sname = group.ShortDescription
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}
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sectionwritten := false
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comments := (options & IniIncludeComments) != IniNone
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for _, option := range group.options {
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if option.isFunc() {
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continue
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}
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if len(option.tag.Get("no-ini")) != 0 {
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continue
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}
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val := option.value
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if (options&IniIncludeDefaults) == IniNone &&
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reflect.DeepEqual(val, option.defaultValue) {
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continue
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}
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if !sectionwritten {
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fmt.Fprintf(writer, "[%s]\n", sname)
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sectionwritten = true
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}
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if comments {
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fmt.Fprintf(writer, "; %s\n", option.Description)
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}
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oname := optionIniName(option)
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switch val.Type().Kind() {
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case reflect.Slice:
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for idx := 0; idx < val.Len(); idx++ {
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v, _ := convertToString(val.Index(idx), option.tag)
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fmt.Fprintf(writer, "%s = %s\n", oname, v)
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}
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if val.Len() == 0 {
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fmt.Fprintf(writer, "; %s =\n", oname)
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}
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case reflect.Map:
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for _, key := range val.MapKeys() {
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k, _ := convertToString(key, option.tag)
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v, _ := convertToString(val.MapIndex(key), option.tag)
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fmt.Fprintf(writer, "%s = %s:%s\n", oname, k, v)
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}
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if val.Len() == 0 {
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fmt.Fprintf(writer, "; %s =\n", oname)
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}
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default:
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v, _ := convertToString(val, option.tag)
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if len(v) != 0 {
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fmt.Fprintf(writer, "%s = %s\n", oname, v)
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} else {
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fmt.Fprintf(writer, "%s =\n", oname)
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}
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}
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if comments {
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fmt.Fprintln(writer)
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}
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}
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if sectionwritten && !comments {
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fmt.Fprintln(writer)
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}
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}
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func writeCommandIni(command *Command, namespace string, writer io.Writer, options IniOptions) {
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command.eachGroup(func(group *Group) {
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writeGroupIni(group, namespace, writer, options)
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})
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for _, c := range command.commands {
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var nns string
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if len(namespace) != 0 {
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nns = c.Name + "." + nns
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} else {
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nns = c.Name
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}
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writeCommandIni(c, nns, writer, options)
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}
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}
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func writeIni(parser *IniParser, writer io.Writer, options IniOptions) {
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writeCommandIni(parser.parser.Command, "", writer, options)
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}
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func readIniFromFile(filename string) (ini, error) {
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file, err := os.Open(filename)
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if err != nil {
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return nil, err
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}
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defer file.Close()
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return readIni(file, filename)
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}
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func readIni(contents io.Reader, filename string) (ini, error) {
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ret := make(ini)
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reader := bufio.NewReader(contents)
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// Empty global section
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section := make(iniSection, 0, 10)
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sectionname := ""
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ret[sectionname] = section
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var lineno uint
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for {
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line, err := readFullLine(reader)
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if err == io.EOF {
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break
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}
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if err != nil {
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return nil, err
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}
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lineno++
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line = strings.TrimSpace(line)
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// Skip empty lines and lines starting with ; (comments)
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if len(line) == 0 || line[0] == ';' {
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continue
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}
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if line[0] == '[' {
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if line[0] != '[' || line[len(line)-1] != ']' {
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return nil, &IniError{
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Message: "malformed section header",
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File: filename,
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LineNumber: lineno,
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}
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}
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name := strings.TrimSpace(line[1 : len(line)-1])
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if len(name) == 0 {
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return nil, &IniError{
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Message: "empty section name",
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File: filename,
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LineNumber: lineno,
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}
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}
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sectionname = name
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section = ret[name]
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if section == nil {
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section = make(iniSection, 0, 10)
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ret[name] = section
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}
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continue
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}
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// Parse option here
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keyval := strings.SplitN(line, "=", 2)
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if len(keyval) != 2 {
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return nil, &IniError{
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Message: fmt.Sprintf("malformed key=value (%s)", line),
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File: filename,
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LineNumber: lineno,
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}
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}
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name := strings.TrimSpace(keyval[0])
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value := strings.TrimSpace(keyval[1])
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section = append(section, iniValue{
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Name: name,
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Value: value,
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})
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ret[sectionname] = section
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}
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return ret, nil
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}
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func (i *IniParser) matchingGroups(name string) []*Group {
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if len(name) == 0 {
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var ret []*Group
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i.parser.eachGroup(func(g *Group) {
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ret = append(ret, g)
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})
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return ret
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}
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g := i.parser.groupByName(name)
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if g != nil {
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return []*Group{g}
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}
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return nil
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}
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func (i *IniParser) parse(ini ini) error {
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p := i.parser
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for name, section := range ini {
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groups := i.matchingGroups(name)
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if len(groups) == 0 {
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return newError(ErrUnknownGroup,
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fmt.Sprintf("could not find option group `%s'", name))
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}
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for _, inival := range section {
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var opt *Option
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for _, group := range groups {
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opt = group.optionByName(inival.Name, func(o *Option, n string) bool {
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return strings.ToLower(o.tag.Get("ini-name")) == strings.ToLower(n)
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})
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if opt != nil && len(opt.tag.Get("no-ini")) != 0 {
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opt = nil
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}
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if opt != nil {
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break
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}
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}
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if opt == nil {
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if (p.Options & IgnoreUnknown) == None {
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return newError(ErrUnknownFlag,
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fmt.Sprintf("unknown option: %s", inival.Name))
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}
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continue
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}
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pval := &inival.Value
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if !opt.canArgument() && len(inival.Value) == 0 {
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pval = nil
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}
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if err := opt.set(pval); err != nil {
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return wrapError(err)
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}
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opt.tag.Set("_read-ini-name", inival.Name)
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}
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}
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return nil
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}
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