2 // Use of this source code is governed by the Apache 2.0 |
2 // Use of this source code is governed by the Apache 2.0 |
3 // license that can be found in the LICENSE file. |
3 // license that can be found in the LICENSE file. |
4 |
4 |
5 package internal |
5 package internal |
6 |
6 |
7 import netcontext "golang.org/x/net/context" |
7 import ( |
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8 "os" |
8 |
9 |
9 // These functions are implementations of the wrapper functions |
10 netcontext "golang.org/x/net/context" |
10 // in ../appengine/identity.go. See that file for commentary. |
11 ) |
11 |
12 |
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13 var ( |
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14 // This is set to true in identity_classic.go, which is behind the appengine build tag. |
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15 // The appengine build tag is set for the first generation runtimes (<= Go 1.9) but not |
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16 // the second generation runtimes (>= Go 1.11), so this indicates whether we're on a |
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17 // first-gen runtime. See IsStandard below for the second-gen check. |
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18 appengineStandard bool |
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19 |
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20 // This is set to true in identity_flex.go, which is behind the appenginevm build tag. |
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21 appengineFlex bool |
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22 ) |
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23 |
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24 // AppID is the implementation of the wrapper function of the same name in |
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25 // ../identity.go. See that file for commentary. |
12 func AppID(c netcontext.Context) string { |
26 func AppID(c netcontext.Context) string { |
13 return appID(FullyQualifiedAppID(c)) |
27 return appID(FullyQualifiedAppID(c)) |
14 } |
28 } |
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29 |
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30 // IsStandard is the implementation of the wrapper function of the same name in |
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31 // ../appengine.go. See that file for commentary. |
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32 func IsStandard() bool { |
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33 // appengineStandard will be true for first-gen runtimes (<= Go 1.9) but not |
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34 // second-gen (>= Go 1.11). |
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35 return appengineStandard || IsSecondGen() |
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36 } |
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37 |
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38 // IsStandard is the implementation of the wrapper function of the same name in |
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39 // ../appengine.go. See that file for commentary. |
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40 func IsSecondGen() bool { |
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41 // Second-gen runtimes set $GAE_ENV so we use that to check if we're on a second-gen runtime. |
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42 return os.Getenv("GAE_ENV") == "standard" |
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43 } |
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44 |
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45 // IsFlex is the implementation of the wrapper function of the same name in |
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46 // ../appengine.go. See that file for commentary. |
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47 func IsFlex() bool { |
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48 return appengineFlex |
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49 } |
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50 |
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51 // IsAppEngine is the implementation of the wrapper function of the same name in |
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52 // ../appengine.go. See that file for commentary. |
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53 func IsAppEngine() bool { |
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54 return IsStandard() || IsFlex() |
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55 } |