Merge pull request #39582 from thaJeztah/its_a_stretch_but_it_was_busted

Pin Dockerfile to -stretch variant because it's bust'd

Dockerfile

@@ -27,7 +27,7 @@
 ARG CROSS="false"
 ARG GO_VERSION=1.12.7
 
-FROM golang:${GO_VERSION} AS base
+FROM golang:${GO_VERSION}-stretch AS base
 ARG APT_MIRROR
 RUN sed -ri "s/(httpredir|deb).debian.org/${APT_MIRROR:-deb.debian.org}/g" /etc/apt/sources.list \
  && sed -ri "s/(security).debian.org/${APT_MIRROR:-security.debian.org}/g" /etc/apt/sources.list

Dockerfile.simple

@@ -7,7 +7,7 @@
 
 ARG GO_VERSION=1.12.7
 
-FROM golang:${GO_VERSION}
+FROM golang:${GO_VERSION}-stretch
 
 # allow replacing httpredir or deb mirror
 ARG APT_MIRROR=deb.debian.org

hack/ci/windows.ps1

@@ -426,20 +426,9 @@ Try {
     Write-Host -ForegroundColor Green "INFO: Location for testing is $env:TEMP"
 
     # CI Integrity check - ensure Dockerfile.windows and Dockerfile go versions match
-    $goVersionDockerfileWindows=$(Get-Content ".\Dockerfile.windows" | Select-String "^ENV GO_VERSION" | Select-object -First 1).ToString().Replace("ENV GO_VERSION=","").Replace("\","").Replace("``","").Trim()
-    $goVersionDockerfile=$(Get-Content ".\Dockerfile" | Select-String "^ENV GO_VERSION" | Select-object -First 1)
-    
-    # As of go 1.11, Dockerfile changed to be in the format like "FROM golang:1.11.0 AS base".
-    # If a version number ends with .0 (as in 1.11.0, a convention used in golang docker
-    # image versions), it needs to be removed (i.e. "1.11.0" becomes "1.11").
-    if ($null -eq $goVersionDockerfile) {
-        $goVersionDockerfile=$(Get-Content ".\Dockerfile" | Select-String "^FROM golang:" | Select-object -First 1)
-        if ($null -ne $goVersionDockerfile) {
-            $goVersionDockerfile = $goVersionDockerfile.ToString().Split(" ")[1].Split(":")[1] -replace '\.0$',''
-        }
-    } else {
-        $goVersionDockerfile = $goVersionDockerfile.ToString().Split(" ")[2]
-    }
+    $goVersionDockerfileWindows=(Select-String -Path ".\Dockerfile.windows" -Pattern "^ARG[\s]+GO_VERSION=(.*)$").Matches.groups[1].Value
+    $goVersionDockerfile=(Select-String -Path ".\Dockerfile" -Pattern "^ARG[\s]+GO_VERSION=(.*)$").Matches.groups[1].Value
+
     if ($null -eq $goVersionDockerfile) {
         Throw "ERROR: Failed to extract golang version from Dockerfile"
     }

hack/make.ps1

@@ -134,7 +134,7 @@ Function Check-InContainer() {
 # outside of a container where it may be out of date with master.
 Function Verify-GoVersion() {
     Try {
-        $goVersionDockerfile=(Select-String -Path ".\Dockerfile" -Pattern "^FROM golang:").ToString().Split(" ")[1].SubString(7) -replace '\.0$',''
+        $goVersionDockerfile=(Select-String -Path ".\Dockerfile" -Pattern "^ARG[\s]+GO_VERSION=(.*)$").Matches.groups[1].Value.TrimEnd(".0")
         $goVersionInstalled=(go version).ToString().Split(" ")[2].SubString(2)
     }
     Catch [Exception] {