mirror of
https://github.com/prometheus/prometheus.git
synced 2024-11-16 10:34:06 -08:00
386 lines
9.1 KiB
Go
386 lines
9.1 KiB
Go
// Copyright 2015 go-swagger maintainers
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package swag
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import (
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"reflect"
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"strings"
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"unicode"
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)
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// commonInitialisms are common acronyms that are kept as whole uppercased words.
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var commonInitialisms *indexOfInitialisms
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// initialisms is a slice of sorted initialisms
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var initialisms []string
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var isInitialism func(string) bool
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// GoNamePrefixFunc sets an optional rule to prefix go names
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// which do not start with a letter.
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//
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// e.g. to help converting "123" into "{prefix}123"
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//
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// The default is to prefix with "X"
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var GoNamePrefixFunc func(string) string
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func init() {
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// Taken from https://github.com/golang/lint/blob/3390df4df2787994aea98de825b964ac7944b817/lint.go#L732-L769
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var configuredInitialisms = map[string]bool{
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"ACL": true,
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"API": true,
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"ASCII": true,
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"CPU": true,
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"CSS": true,
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"DNS": true,
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"EOF": true,
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"GUID": true,
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"HTML": true,
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"HTTPS": true,
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"HTTP": true,
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"ID": true,
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"IP": true,
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"IPv4": true,
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"IPv6": true,
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"JSON": true,
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"LHS": true,
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"OAI": true,
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"QPS": true,
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"RAM": true,
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"RHS": true,
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"RPC": true,
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"SLA": true,
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"SMTP": true,
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"SQL": true,
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"SSH": true,
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"TCP": true,
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"TLS": true,
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"TTL": true,
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"UDP": true,
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"UI": true,
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"UID": true,
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"UUID": true,
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"URI": true,
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"URL": true,
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"UTF8": true,
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"VM": true,
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"XML": true,
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"XMPP": true,
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"XSRF": true,
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"XSS": true,
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}
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// a thread-safe index of initialisms
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commonInitialisms = newIndexOfInitialisms().load(configuredInitialisms)
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initialisms = commonInitialisms.sorted()
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// a test function
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isInitialism = commonInitialisms.isInitialism
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}
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const (
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//collectionFormatComma = "csv"
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collectionFormatSpace = "ssv"
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collectionFormatTab = "tsv"
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collectionFormatPipe = "pipes"
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collectionFormatMulti = "multi"
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)
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// JoinByFormat joins a string array by a known format (e.g. swagger's collectionFormat attribute):
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// ssv: space separated value
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// tsv: tab separated value
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// pipes: pipe (|) separated value
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// csv: comma separated value (default)
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func JoinByFormat(data []string, format string) []string {
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if len(data) == 0 {
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return data
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}
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var sep string
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switch format {
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case collectionFormatSpace:
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sep = " "
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case collectionFormatTab:
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sep = "\t"
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case collectionFormatPipe:
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sep = "|"
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case collectionFormatMulti:
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return data
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default:
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sep = ","
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}
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return []string{strings.Join(data, sep)}
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}
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// SplitByFormat splits a string by a known format:
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// ssv: space separated value
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// tsv: tab separated value
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// pipes: pipe (|) separated value
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// csv: comma separated value (default)
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//
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func SplitByFormat(data, format string) []string {
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if data == "" {
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return nil
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}
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var sep string
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switch format {
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case collectionFormatSpace:
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sep = " "
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case collectionFormatTab:
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sep = "\t"
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case collectionFormatPipe:
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sep = "|"
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case collectionFormatMulti:
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return nil
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default:
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sep = ","
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}
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var result []string
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for _, s := range strings.Split(data, sep) {
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if ts := strings.TrimSpace(s); ts != "" {
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result = append(result, ts)
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}
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}
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return result
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}
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type byInitialism []string
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func (s byInitialism) Len() int {
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return len(s)
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}
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func (s byInitialism) Swap(i, j int) {
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s[i], s[j] = s[j], s[i]
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}
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func (s byInitialism) Less(i, j int) bool {
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if len(s[i]) != len(s[j]) {
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return len(s[i]) < len(s[j])
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}
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return strings.Compare(s[i], s[j]) > 0
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}
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// Removes leading whitespaces
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func trim(str string) string {
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return strings.Trim(str, " ")
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}
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// Shortcut to strings.ToUpper()
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func upper(str string) string {
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return strings.ToUpper(trim(str))
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}
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// Shortcut to strings.ToLower()
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func lower(str string) string {
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return strings.ToLower(trim(str))
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}
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// Camelize an uppercased word
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func Camelize(word string) (camelized string) {
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for pos, ru := range []rune(word) {
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if pos > 0 {
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camelized += string(unicode.ToLower(ru))
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} else {
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camelized += string(unicode.ToUpper(ru))
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}
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}
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return
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}
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// ToFileName lowercases and underscores a go type name
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func ToFileName(name string) string {
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in := split(name)
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out := make([]string, 0, len(in))
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for _, w := range in {
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out = append(out, lower(w))
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}
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return strings.Join(out, "_")
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}
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// ToCommandName lowercases and underscores a go type name
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func ToCommandName(name string) string {
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in := split(name)
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out := make([]string, 0, len(in))
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for _, w := range in {
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out = append(out, lower(w))
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}
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return strings.Join(out, "-")
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}
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// ToHumanNameLower represents a code name as a human series of words
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func ToHumanNameLower(name string) string {
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in := newSplitter(withPostSplitInitialismCheck).split(name)
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out := make([]string, 0, len(in))
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for _, w := range in {
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if !w.IsInitialism() {
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out = append(out, lower(w.GetOriginal()))
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} else {
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out = append(out, w.GetOriginal())
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}
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}
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return strings.Join(out, " ")
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}
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// ToHumanNameTitle represents a code name as a human series of words with the first letters titleized
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func ToHumanNameTitle(name string) string {
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in := newSplitter(withPostSplitInitialismCheck).split(name)
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out := make([]string, 0, len(in))
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for _, w := range in {
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original := w.GetOriginal()
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if !w.IsInitialism() {
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out = append(out, Camelize(original))
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} else {
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out = append(out, original)
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}
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}
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return strings.Join(out, " ")
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}
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// ToJSONName camelcases a name which can be underscored or pascal cased
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func ToJSONName(name string) string {
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in := split(name)
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out := make([]string, 0, len(in))
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for i, w := range in {
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if i == 0 {
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out = append(out, lower(w))
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continue
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}
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out = append(out, Camelize(w))
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}
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return strings.Join(out, "")
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}
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// ToVarName camelcases a name which can be underscored or pascal cased
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func ToVarName(name string) string {
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res := ToGoName(name)
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if isInitialism(res) {
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return lower(res)
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}
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if len(res) <= 1 {
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return lower(res)
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}
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return lower(res[:1]) + res[1:]
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}
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// ToGoName translates a swagger name which can be underscored or camel cased to a name that golint likes
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func ToGoName(name string) string {
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lexems := newSplitter(withPostSplitInitialismCheck).split(name)
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result := ""
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for _, lexem := range lexems {
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goName := lexem.GetUnsafeGoName()
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// to support old behavior
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if lexem.IsInitialism() {
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goName = upper(goName)
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}
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result += goName
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}
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if len(result) > 0 {
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// Only prefix with X when the first character isn't an ascii letter
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first := []rune(result)[0]
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if !unicode.IsLetter(first) || (first > unicode.MaxASCII && !unicode.IsUpper(first)) {
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if GoNamePrefixFunc == nil {
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return "X" + result
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}
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result = GoNamePrefixFunc(name) + result
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}
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first = []rune(result)[0]
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if unicode.IsLetter(first) && !unicode.IsUpper(first) {
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result = string(append([]rune{unicode.ToUpper(first)}, []rune(result)[1:]...))
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}
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}
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return result
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}
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// ContainsStrings searches a slice of strings for a case-sensitive match
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func ContainsStrings(coll []string, item string) bool {
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for _, a := range coll {
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if a == item {
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return true
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}
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}
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return false
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}
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// ContainsStringsCI searches a slice of strings for a case-insensitive match
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func ContainsStringsCI(coll []string, item string) bool {
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for _, a := range coll {
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if strings.EqualFold(a, item) {
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return true
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}
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}
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return false
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}
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type zeroable interface {
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IsZero() bool
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}
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// IsZero returns true when the value passed into the function is a zero value.
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// This allows for safer checking of interface values.
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func IsZero(data interface{}) bool {
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// check for things that have an IsZero method instead
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if vv, ok := data.(zeroable); ok {
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return vv.IsZero()
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}
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// continue with slightly more complex reflection
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v := reflect.ValueOf(data)
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switch v.Kind() {
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case reflect.String:
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return v.Len() == 0
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case reflect.Bool:
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return !v.Bool()
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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return v.Int() == 0
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
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return v.Uint() == 0
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case reflect.Float32, reflect.Float64:
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return v.Float() == 0
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case reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice:
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return v.IsNil()
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case reflect.Struct, reflect.Array:
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return reflect.DeepEqual(data, reflect.Zero(v.Type()).Interface())
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case reflect.Invalid:
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return true
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}
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return false
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}
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// AddInitialisms add additional initialisms
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func AddInitialisms(words ...string) {
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for _, word := range words {
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//commonInitialisms[upper(word)] = true
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commonInitialisms.add(upper(word))
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}
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// sort again
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initialisms = commonInitialisms.sorted()
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}
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// CommandLineOptionsGroup represents a group of user-defined command line options
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type CommandLineOptionsGroup struct {
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ShortDescription string
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LongDescription string
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Options interface{}
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}
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