CI: add test (#26)

Reviewed-on: https://codeberg.org/woodpecker-plugins/plugin-docker-buildx/pulls/26
Reviewed-by: anbraten <anbraten@noreply.codeberg.org>
Co-authored-by: 6543 <6543@obermui.de>
Co-committed-by: 6543 <6543@obermui.de>

.gitignore

@@ -1,4 +1,5 @@
 /release/
+/vendor/
 
 plugin-docker-buildx
 

.woodpecker.yml

@@ -2,9 +2,18 @@ branches: main
 
 variables:
     - &platforms 'linux/amd64,linux/arm64'
+    - &golang 'golang:1.18'
 
 pipeline:
-  dryrun:
+  vendor:
+    image: *golang
+    commands: go mod vendor
+
+  test:
+    image: *golang
+    commands: go test -cover ./...
+
+  publish-dryrun:
     image: woodpeckerci/plugin-docker-buildx:v20.10.18
     settings:
       platforms: *platforms

plugin/impl.go

@@ -130,7 +130,7 @@ func (p *Plugin) writeBuildkitConfig() error {
 		caPath := fmt.Sprintf("/etc/docker/certs.d/%s/ca.crt", registry)
 		ca, err := os.Open(caPath)
 		if err != nil && !os.IsNotExist(err) {
-			logrus.Warnf("error reading %s: %w", caPath, err)
+			logrus.Warnf("error reading %s: %v", caPath, err)
 		} else if err == nil {
 			ca.Close()
 			p.settings.Daemon.BuildkitConfig = fmt.Sprintf(buildkitConfigTemplate, registry, caPath)