From c8fa90d6abf559ab8c042b4eece2c4e28bdfb4a5 Mon Sep 17 00:00:00 2001
From: Joachim Bauch <bauch@struktur.de>
Date: Thu, 2 Feb 2023 13:25:39 +0100
Subject: [PATCH 1/3] CI: Also test with Golang 1.20

---
 .github/workflows/tarball.yml | 2 ++
 .github/workflows/test.yml    | 1 +
 2 files changed, 3 insertions(+)

diff --git a/.github/workflows/tarball.yml b/.github/workflows/tarball.yml
index cc71eec..54f6c63 100644
--- a/.github/workflows/tarball.yml
+++ b/.github/workflows/tarball.yml
@@ -27,6 +27,7 @@ jobs:
           - "1.17"
           - "1.18"
           - "1.19"
+          - "1.20"
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3
@@ -74,6 +75,7 @@ jobs:
           - "1.17"
           - "1.18"
           - "1.19"
+          - "1.20"
     runs-on: ubuntu-latest
     needs: [create]
     steps:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d6d35af..2b2ad52 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -29,6 +29,7 @@ jobs:
           - "1.17"
           - "1.18"
           - "1.19"
+          - "1.20"
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3

From cb68e074bb6b87de71460eabb52ad534e59343e7 Mon Sep 17 00:00:00 2001
From: Joachim Bauch <bauch@struktur.de>
Date: Thu, 2 Feb 2023 13:27:27 +0100
Subject: [PATCH 2/3] docker: Build with Golang 1.20

---
 docker/proxy/Dockerfile  | 2 +-
 docker/server/Dockerfile | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/docker/proxy/Dockerfile b/docker/proxy/Dockerfile
index 89e934c..d043411 100644
--- a/docker/proxy/Dockerfile
+++ b/docker/proxy/Dockerfile
@@ -1,4 +1,4 @@
-FROM --platform=${BUILDPLATFORM} golang:1.19 AS builder
+FROM --platform=${BUILDPLATFORM} golang:1.20 AS builder
 ARG TARGETARCH
 ARG TARGETOS
 
diff --git a/docker/server/Dockerfile b/docker/server/Dockerfile
index 180e334..be36ca7 100644
--- a/docker/server/Dockerfile
+++ b/docker/server/Dockerfile
@@ -1,4 +1,4 @@
-FROM --platform=${BUILDPLATFORM} golang:1.19 AS builder
+FROM --platform=${BUILDPLATFORM} golang:1.20 AS builder
 
 WORKDIR /workdir
 

From a34f3b609364a144242f05c9f11cb492811ed38c Mon Sep 17 00:00:00 2001
From: Joachim Bauch <bauch@struktur.de>
Date: Wed, 8 Feb 2023 08:40:41 +0100
Subject: [PATCH 3/3] No longer support Golang 1.17.

While it might still compile with 1.17, it's no longer tested through CI
and at some point, features that require 1.18 will be used.
---
 .github/workflows/tarball.yml | 2 --
 .github/workflows/test.yml    | 1 -
 README.md                     | 2 +-
 3 files changed, 1 insertion(+), 4 deletions(-)

diff --git a/.github/workflows/tarball.yml b/.github/workflows/tarball.yml
index 54f6c63..4b176e9 100644
--- a/.github/workflows/tarball.yml
+++ b/.github/workflows/tarball.yml
@@ -24,7 +24,6 @@ jobs:
     strategy:
       matrix:
         go-version:
-          - "1.17"
           - "1.18"
           - "1.19"
           - "1.20"
@@ -72,7 +71,6 @@ jobs:
     strategy:
       matrix:
         go-version:
-          - "1.17"
           - "1.18"
           - "1.19"
           - "1.20"
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 2b2ad52..9dc8b0d 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -26,7 +26,6 @@ jobs:
     strategy:
       matrix:
         go-version:
-          - "1.17"
           - "1.18"
           - "1.19"
           - "1.20"
diff --git a/README.md b/README.md
index 958650a..30919fd 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ information on the API of the signaling server.
 The following tools are required for building the signaling server.
 
 - git
-- go >= 1.17
+- go >= 1.18 (usually the last three versions of go are supported)
 - make
 - protobuf-compiler >= 3