// Copyright 2016 Google LLC // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package internal import ( "fmt" "runtime" "strings" "sync" "unicode" ) const ( // ProdAddr is the production address. ProdAddr = "logging.googleapis.com:443" ) // InstrumentOnce guards instrumenting logs one time var InstrumentOnce = new(sync.Once) // LogPath creates a formatted path from a parent and a logID. func LogPath(parent, logID string) string { logID = strings.Replace(logID, "/", "%2F", -1) return fmt.Sprintf("%s/logs/%s", parent, logID) } // LogIDFromPath parses and returns the ID from a log path. func LogIDFromPath(parent, path string) string { start := len(parent) + len("/logs/") if len(path) < start { return "" } logID := path[start:] return strings.Replace(logID, "%2F", "/", -1) } // VersionGo returns the Go runtime version. The returned string // has no whitespace, suitable for reporting in header. func VersionGo() string { const develPrefix = "devel +" s := runtime.Version() if strings.HasPrefix(s, develPrefix) { s = s[len(develPrefix):] if p := strings.IndexFunc(s, unicode.IsSpace); p >= 0 { s = s[:p] } return s } notSemverRune := func(r rune) bool { return !strings.ContainsRune("0123456789.", r) } if strings.HasPrefix(s, "go1") { s = s[2:] var prerelease string if p := strings.IndexFunc(s, notSemverRune); p >= 0 { s, prerelease = s[:p], s[p:] } if strings.HasSuffix(s, ".") { s += "0" } else if strings.Count(s, ".") < 2 { s += ".0" } if prerelease != "" { s += "-" + prerelease } return s } return "UNKNOWN" }