From 81261dc8c5e04c8ac782e0b918a94be675075dff 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.

Signed-off-by: Milas Bowman <milas.bowman@docker.com>
---
 .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 19bf9643..c2cd9330 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 592376f8..7a1d200e 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