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We're starting to expose a number of so-called "Terraform-native services" that can be offered under a friendly hostname. The first of these will be module registry services, as they expand from the public Terraform Registry to private registry services within Terraform Enterprise and elsewhere. This package is for wrangling these "friendly hostnames", which start their lives as user-specified unicode strings, can be converted to Punycode for storage and comparison, and can in turn be converted back into normalized unicode for display to the user.
70 lines
1.4 KiB
Go
70 lines
1.4 KiB
Go
package svchost
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import (
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"strings"
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)
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// A labelIter allows iterating over domain name labels.
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//
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// This type is copied from golang.org/x/net/idna, where it is used
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// to segment hostnames into their separate labels for analysis. We use
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// it for the same purpose here, in ForComparison.
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type labelIter struct {
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orig string
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slice []string
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curStart int
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curEnd int
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i int
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}
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func (l *labelIter) reset() {
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l.curStart = 0
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l.curEnd = 0
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l.i = 0
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}
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func (l *labelIter) done() bool {
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return l.curStart >= len(l.orig)
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}
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func (l *labelIter) result() string {
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if l.slice != nil {
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return strings.Join(l.slice, ".")
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}
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return l.orig
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}
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func (l *labelIter) label() string {
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if l.slice != nil {
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return l.slice[l.i]
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}
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p := strings.IndexByte(l.orig[l.curStart:], '.')
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l.curEnd = l.curStart + p
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if p == -1 {
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l.curEnd = len(l.orig)
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}
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return l.orig[l.curStart:l.curEnd]
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}
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// next sets the value to the next label. It skips the last label if it is empty.
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func (l *labelIter) next() {
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l.i++
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if l.slice != nil {
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if l.i >= len(l.slice) || l.i == len(l.slice)-1 && l.slice[l.i] == "" {
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l.curStart = len(l.orig)
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}
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} else {
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l.curStart = l.curEnd + 1
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if l.curStart == len(l.orig)-1 && l.orig[l.curStart] == '.' {
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l.curStart = len(l.orig)
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}
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}
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}
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func (l *labelIter) set(s string) {
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if l.slice == nil {
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l.slice = strings.Split(l.orig, ".")
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}
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l.slice[l.i] = s
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}
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