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37 lines
1.2 KiB
Go
37 lines
1.2 KiB
Go
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// Copyright (c) 2022 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Package strs contains string-related utility funcs.
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package strs
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import "strings"
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// CutPrefix returns s without the provided leading prefix string
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// and reports whether it found the prefix.
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// If s doesn't start with prefix, CutPrefix returns s, false.
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// If prefix is the empty string, CutPrefix returns s, true.
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//
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// TODO: remove this once Go 1.20 is out with it.
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// See https://github.com/tailscale/tailscale/issues/5309
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func CutPrefix(s, prefix string) (after string, found bool) {
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if !strings.HasPrefix(s, prefix) {
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return s, false
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}
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return s[len(prefix):], true
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}
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// CutSuffix returns s without the provided ending suffix string
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// and reports whether it found the suffix.
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// If s doesn't end with suffix, CutSuffix returns s, false.
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// If suffix is the empty string, CutSuffix returns s, true.
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//
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// See https://github.com/tailscale/tailscale/issues/5309
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// TODO: remove this once Go 1.20 is out with it.
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func CutSuffix(s, suffix string) (before string, found bool) {
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if !strings.HasSuffix(s, suffix) {
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return s, false
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}
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return s[:len(s)-len(suffix)], true
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}
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