From d38b0061c4c0e91a26a8ea83c115bcd977e987b9 Mon Sep 17 00:00:00 2001
From: Milas Bowman <milas.bowman@docker.com>
Date: Fri, 29 Jul 2022 09:55:30 -0400
Subject: [PATCH] build: ensure compatibility for all supported Go versions

Use matrix testing to test on currently supported Go versions,
including 1.19 pre-release.

The `go.mod` compatibility level is also set to 1.17. Once 1.19
is released, we should bump to 1.18, as Go always supports the
current version and one older, so we should stick with this as
well.
---
 .github/workflows/ci.yml | 16 +++++++++++-----
 go.mod                   |  2 +-
 2 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 19bf96434..c2cd93305 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,5 +1,9 @@
 on: [push, pull_request]
 name: Continuous integration
+
+permissions:
+  contents: read
+
 jobs:
   validate:
     name: validate
@@ -7,7 +11,7 @@ jobs:
     timeout-minutes: 5
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Lint code
         uses: golangci/golangci-lint-action@v2
       - name: Check license
@@ -16,16 +20,18 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.18.x]
+        go-version: ['1.17', '1.18', '>=1.19.0-rc.2']
         platform: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.platform }}
     timeout-minutes: 5
     steps:
+    - name: Checkout code
+      uses: actions/checkout@v3
     - name: Install Go
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v3
       with:
         go-version: ${{ matrix.go-version }}
-    - name: Checkout code
-      uses: actions/checkout@v2
+        check-latest: true
+        cache: true
     - name: Test
       run: go test ./...
diff --git a/go.mod b/go.mod
index 592376f87..7a1d200e3 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/compose-spec/compose-go
 
-go 1.18
+go 1.17
 
 require (
 	github.com/distribution/distribution/v3 v3.0.0-20220725133111-4bf3547399eb