Migrate to checker-sdk-go v1.3.0 with standalone build tag

The SDK split the HTTP server scaffolding into the new
checker-sdk-go/checker/server subpackage. Update main.go to import
server and call server.New, and isolate the interactive form code
behind the standalone build tag so plugin/builtin builds skip
net/http entirely.

Dockerfile

@@ -6,7 +6,7 @@ WORKDIR /src
 COPY go.mod go.sum ./
 RUN go mod download
 COPY . .
-RUN CGO_ENABLED=0 go build -ldflags "-X main.Version=${CHECKER_VERSION}" -o /checker-ping .
+RUN CGO_ENABLED=0 go build -tags standalone -ldflags "-X main.Version=${CHECKER_VERSION}" -o /checker-ping .
 
 FROM scratch
 COPY --from=builder /checker-ping /checker-ping

Makefile

@@ -6,12 +6,12 @@ CHECKER_SOURCES := main.go $(wildcard checker/*.go)
 
 GO_LDFLAGS := -X main.Version=$(CHECKER_VERSION)
 
-.PHONY: all plugin docker clean
+.PHONY: all plugin docker test clean
 
 all: $(CHECKER_NAME)
 
 $(CHECKER_NAME): $(CHECKER_SOURCES)
-	go build -ldflags "$(GO_LDFLAGS)" -o $@ .
+	go build -tags standalone -ldflags "$(GO_LDFLAGS)" -o $@ .
 
 plugin: $(CHECKER_NAME).so
 
@@ -21,5 +21,8 @@ $(CHECKER_NAME).so: $(CHECKER_SOURCES) $(wildcard plugin/*.go)
 docker:
 	docker build --build-arg CHECKER_VERSION=$(CHECKER_VERSION) -t $(CHECKER_IMAGE) .
 
+test:
+	go test -tags standalone ./...
+
 clean:
 	rm -f $(CHECKER_NAME) $(CHECKER_NAME).so

README.md

@@ -19,8 +19,8 @@ make
 
 The server exposes:
 
-- `GET /health` — health check
-- `POST /collect` — collect ping observations (happyDomain external checker protocol)
+- `GET /health`, health check
+- `POST /collect`, collect ping observations (happyDomain external checker protocol)
 
 ### Docker
 

checker/definition.go

@@ -38,7 +38,7 @@ import (
 var Version = "built-in"
 
 // Definition returns the CheckerDefinition for the ping checker.
-func Definition() *happydns.CheckerDefinition {
+func (p *pingProvider) Definition() *happydns.CheckerDefinition {
 	return &happydns.CheckerDefinition{
 		ID:      "ping",
 		Name:    "Ping (ICMP)",
@@ -89,9 +89,7 @@ func Definition() *happydns.CheckerDefinition {
 				},
 			},
 		},
-		Rules: []happydns.CheckRule{
-			Rule(),
-		},
+		Rules: Rules(),
 		Interval: &happydns.CheckIntervalSpec{
 			Min:     1 * time.Minute,
 			Max:     1 * time.Hour,

checker/interactive.go

@@ -19,6 +19,8 @@
 // You should have received a copy of the GNU Affero General Public License
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
+//go:build standalone
+
 package checker
 
 import (
@@ -30,7 +32,7 @@ import (
 	sdk "git.happydns.org/checker-sdk-go/checker"
 )
 
-// RenderForm implements sdk.CheckerInteractive. It exposes a minimal form
+// RenderForm implements server.Interactive. It exposes a minimal form
 // letting a human submit one or more ping targets (hostnames or IPs) along
 // with the usual threshold knobs.
 func (p *pingProvider) RenderForm() []sdk.CheckerOptionField {
@@ -76,8 +78,8 @@ func (p *pingProvider) RenderForm() []sdk.CheckerOptionField {
 	}
 }
 
-// ParseForm implements sdk.CheckerInteractive. It converts the HTML form
-// inputs into a CheckerOptions that Collect can consume directly — pinging
+// ParseForm implements server.Interactive. It converts the HTML form
+// inputs into a CheckerOptions that Collect can consume directly, pinging
 // resolves hostnames on its own, so no extra lookups are needed here.
 func (p *pingProvider) ParseForm(r *http.Request) (sdk.CheckerOptions, error) {
 	raw := strings.TrimSpace(r.FormValue("addresses"))

checker/provider.go

@@ -47,11 +47,6 @@ func (p *pingProvider) Key() happydns.ObservationKey {
 	return ObservationKeyPing
 }
 
-// Definition implements happydns.CheckerDefinitionProvider.
-func (p *pingProvider) Definition() *happydns.CheckerDefinition {
-	return Definition()
-}
-
 // ExtractMetrics implements happydns.CheckerMetricsReporter.
 func (p *pingProvider) ExtractMetrics(ctx happydns.ReportContext, collectedAt time.Time) ([]happydns.CheckMetric, error) {
 	var data PingData

go.mod

@@ -3,7 +3,7 @@ module git.happydns.org/checker-ping
 go 1.25.0
 
 require (
-	git.happydns.org/checker-sdk-go v1.2.0
+	git.happydns.org/checker-sdk-go v1.3.0
 	git.happydns.org/happyDomain v0.7.0
 	github.com/prometheus-community/pro-bing v0.8.0
 )

go.sum

@@ -1,5 +1,5 @@
-git.happydns.org/checker-sdk-go v1.2.0 h1:v4MpKAz0W3PwP+bxx3pya8w893sVH5xTD1of1cc0TV8=
-git.happydns.org/checker-sdk-go v1.2.0/go.mod h1:aNAcfYFfbhvH9kJhE0Njp5GX0dQbxdRB0rJ0KvSC5nI=
+git.happydns.org/checker-sdk-go v1.3.0 h1:FG2kIhlJCzI0m35EhxSgn4UWc9M4ha6aZTeoChu4l7A=
+git.happydns.org/checker-sdk-go v1.3.0/go.mod h1:aNAcfYFfbhvH9kJhE0Njp5GX0dQbxdRB0rJ0KvSC5nI=
 git.happydns.org/happyDomain v0.7.0 h1:NV82/NbcSeRm0+IUZqaK3Vu9Ovl5+vv4AigUJZMdwws=
 git.happydns.org/happyDomain v0.7.0/go.mod h1:5tgkmqFE65kK359rY49V++49wgZ0gco+Gh9X6tbL+bY=
 github.com/bytedance/gopkg v0.1.3 h1:TPBSwH8RsouGCBcMBktLt1AymVo2TVsBVCY4b6TnZ/M=

main.go

@@ -26,7 +26,7 @@ import (
 	"log"
 
 	ping "git.happydns.org/checker-ping/checker"
-	sdk "git.happydns.org/checker-sdk-go/checker"
+	"git.happydns.org/checker-sdk-go/checker/server"
 )
 
 var (
@@ -47,8 +47,8 @@ func main() {
 	// CheckerDefinition.Version.
 	ping.Version = Version
 
-	server := sdk.NewServer(ping.ProviderWithPrivileged(*privileged))
-	if err := server.ListenAndServe(*listenAddr); err != nil {
+	srv := server.New(ping.ProviderWithPrivileged(*privileged))
+	if err := srv.ListenAndServe(*listenAddr); err != nil {
 		log.Fatalf("server error: %v", err)
 	}
 }

plugin/plugin.go

@@ -22,5 +22,6 @@ func NewCheckerPlugin() (*sdk.CheckerDefinition, sdk.ObservationProvider, error)
 	// Propagate the plugin's version to the checker package so it shows up
 	// in CheckerDefinition.Version.
 	ping.Version = Version
-	return ping.Definition(), ping.Provider(), nil
+	prvd := ping.Provider()
+	return prvd.(sdk.CheckerDefinitionProvider).Definition(), prvd, nil
 }