update to go1.21.1, and fix download-URL

This required changes to the download-URL, as downloads are now provided
using the full version (including the `.0` patch version);

    curl -sI https://go.dev/dl/go1.21.windows-amd64.zip | grep 'location'
    location: https://dl.google.com/go/go1.21.windows-amd64.zip

    curl -sI https://dl.google.com/go/go1.21.windows-amd64.zip
    HTTP/2 404
    # ...

    curl -sI https://dl.google.com/go/go1.21.0.windows-amd64.zip
    HTTP/2 200
    # ...

Unfortunately this also means that the GO_VERSION can no longer be set to
versions lower than 1.21.0 (without additional changes), because older
versions do NOT provide the `.0` version, and Go 1.21.0 and up, no longer
provides URLs _without_ the `.0` version.

Co-authored-by: Bjorn Neergaard <bjorn.neergaard@docker.com>
Signed-off-by: Bjorn Neergaard <bjorn.neergaard@docker.com>
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

.github/workflows/.windows.yml

@@ -15,7 +15,7 @@ on:
         default: false
 
 env:
-  GO_VERSION: "1.20.8"
+  GO_VERSION: "1.21.1"
   GOTESTLIST_VERSION: v0.3.1
   TESTSTAT_VERSION: v0.1.3
   WINDOWS_BASE_IMAGE: mcr.microsoft.com/windows/servercore

.github/workflows/buildkit.yml

@@ -13,7 +13,7 @@ on:
   pull_request:
 
 env:
-  GO_VERSION: "1.20.8"
+  GO_VERSION: "1.21.1"
   DESTDIR: ./build
 
 jobs:

.github/workflows/test.yml

@@ -15,7 +15,7 @@ on:
   pull_request:
 
 env:
-  GO_VERSION: "1.20.8"
+  GO_VERSION: "1.21.1"
   GOTESTLIST_VERSION: v0.3.1
   TESTSTAT_VERSION: v0.1.3
   ITG_CLI_MATRIX_SIZE: 6

Dockerfile

@@ -1,6 +1,6 @@
 # syntax=docker/dockerfile:1
 
-ARG GO_VERSION=1.20.8
+ARG GO_VERSION=1.21.1
 ARG BASE_DEBIAN_DISTRO="bullseye"
 ARG GOLANG_IMAGE="golang:${GO_VERSION}-${BASE_DEBIAN_DISTRO}"
 ARG XX_VERSION=1.2.1

Dockerfile.simple

@@ -5,7 +5,7 @@
 
 # This represents the bare minimum required to build and test Docker.
 
-ARG GO_VERSION=1.20.8
+ARG GO_VERSION=1.21.1
 
 ARG BASE_DEBIAN_DISTRO="bullseye"
 ARG GOLANG_IMAGE="golang:${GO_VERSION}-${BASE_DEBIAN_DISTRO}"

Dockerfile.windows

@@ -161,7 +161,7 @@ FROM ${WINDOWS_BASE_IMAGE}:${WINDOWS_BASE_IMAGE_TAG}
 # Use PowerShell as the default shell
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]
 
-ARG GO_VERSION=1.20.8
+ARG GO_VERSION=1.21.1
 ARG GOTESTSUM_VERSION=v1.8.2
 ARG GOWINRES_VERSION=v0.3.0
 ARG CONTAINERD_VERSION=v1.7.6
@@ -220,7 +220,7 @@ RUN `
   Download-File $location C:\gitsetup.zip; `
   `
   Write-Host INFO: Downloading go...; `
-  $dlGoVersion=$Env:GO_VERSION -replace '\.0$',''; `
+  $dlGoVersion=$Env:GO_VERSION; `
   Download-File "https://go.dev/dl/go${dlGoVersion}.windows-amd64.zip" C:\go.zip; `
   `
   Write-Host INFO: Downloading compiler 1 of 3...; `

hack/dockerfiles/generate-files.Dockerfile

@@ -1,6 +1,6 @@
 # syntax=docker/dockerfile:1
 
-ARG GO_VERSION=1.20.8
+ARG GO_VERSION=1.21.1
 ARG BASE_DEBIAN_DISTRO="bullseye"
 ARG PROTOC_VERSION=3.11.4