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// Copyright 2011 Google Inc. All rights reserved.
// Use of this source code is governed by the Apache 2.0
// license that can be found in the LICENSE file.
package internal
import (
"os"
netcontext "golang.org/x/net/context"
)
var (
// This is set to true in identity_classic.go, which is behind the appengine build tag.
// The appengine build tag is set for the first generation runtimes (<= Go 1.9) but not
// the second generation runtimes (>= Go 1.11), so this indicates whether we're on a
// first-gen runtime. See IsStandard below for the second-gen check.
appengineStandard bool
// This is set to true in identity_flex.go, which is behind the appenginevm build tag.
appengineFlex bool
)
// AppID is the implementation of the wrapper function of the same name in
// ../identity.go. See that file for commentary.
func AppID(c netcontext.Context) string {
return appID(FullyQualifiedAppID(c))
}
// IsStandard is the implementation of the wrapper function of the same name in
// ../appengine.go. See that file for commentary.
func IsStandard() bool {
// appengineStandard will be true for first-gen runtimes (<= Go 1.9) but not
// second-gen (>= Go 1.11).
return appengineStandard || IsSecondGen()
}
// IsStandard is the implementation of the wrapper function of the same name in
// ../appengine.go. See that file for commentary.
func IsSecondGen() bool {
// Second-gen runtimes set $GAE_ENV so we use that to check if we're on a second-gen runtime.
return os.Getenv("GAE_ENV") == "standard"
}
// IsFlex is the implementation of the wrapper function of the same name in
// ../appengine.go. See that file for commentary.
func IsFlex() bool {
return appengineFlex
}
// IsAppEngine is the implementation of the wrapper function of the same name in
// ../appengine.go. See that file for commentary.
func IsAppEngine() bool {
return IsStandard() || IsFlex()
}
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