cf4f19dd4c
This commit explicitly ignores errors that were already intentionally ignored in btcctl by using an _ to make the errcheck utility happy. It is also nice to make it explicit that the error is being ignored intentionally rather than leave questions of whether it was accidentally forgotten.
75 lines
2.5 KiB
Go
75 lines
2.5 KiB
Go
// Copyright (c) 2013 Conformal Systems LLC.
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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package main
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import (
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"bytes"
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"fmt"
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"strings"
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)
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// semanticAlphabet
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const semanticAlphabet = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-"
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// These constants define the application version and follow the semantic
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// versioning 2.0.0 spec (http://semver.org/).
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const (
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appMajor uint = 0
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appMinor uint = 8
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appPatch uint = 0
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// appPreRelease MUST only contain characters from semanticAlphabet
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// per the semantic versioning spec.
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appPreRelease = "beta"
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)
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// appBuild is defined as a variable so it can be overridden during the build
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// process with '-ldflags "-X main.appBuild foo' if needed. It MUST only
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// contain characters from semanticAlphabet per the semantic versioning spec.
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var appBuild string
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// version returns the application version as a properly formed string per the
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// semantic versioning 2.0.0 spec (http://semver.org/).
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func version() string {
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// Start with the major, minor, and patch versions.
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version := fmt.Sprintf("%d.%d.%d", appMajor, appMinor, appPatch)
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// Append pre-release version if there is one. The hyphen called for
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// by the semantic versioning spec is automatically appended and should
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// not be contained in the pre-release string. The pre-release version
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// is not appended if it contains invalid characters.
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preRelease := normalizeVerString(appPreRelease)
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if preRelease != "" {
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version = fmt.Sprintf("%s-%s", version, preRelease)
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}
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// Append build metadata if there is any. The plus called for
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// by the semantic versioning spec is automatically appended and should
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// not be contained in the build metadata string. The build metadata
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// string is not appended if it contains invalid characters.
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build := normalizeVerString(appBuild)
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if build != "" {
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version = fmt.Sprintf("%s+%s", version, build)
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}
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return version
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}
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// normalizeVerString returns the passed string stripped of all characters which
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// are not valid according to the semantic versioning guidelines for pre-release
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// version and build metadata strings. In particular they MUST only contain
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// characters in semanticAlphabet.
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func normalizeVerString(str string) string {
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var result bytes.Buffer
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for _, r := range str {
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if strings.ContainsRune(semanticAlphabet, r) {
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// Ignoring the error here since it can only fail if
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// the the system is out of memory and there are much
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// bigger issues at that point.
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_, _ = result.WriteRune(r)
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}
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}
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return result.String()
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}
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