[FEAT] Implement Basic Service

.air.toml

@@ -0,0 +1,46 @@
+root = "."
+testdata_dir = "testdata"
+tmp_dir = "tmp"
+
+[build]
+  args_bin = ["serve"]
+  bin = "./tmp/bin/uptime"
+  cmd = "go build -ldflags=\"-X 'go.rtnl.ai/uptime/pkg.GitVersion=$(git rev-parse --short HEAD)'\" -o ./tmp/bin/uptime ./cmd/uptime"
+  delay = 1000
+  exclude_dir = ["assets", "tmp", "vendor", "testdata", "dev", ".github", ".vscode"]
+  exclude_file = ["docker-compose.yaml", "Dockerfile", ".dockerignore", ".gitignore", ".env.template"]
+  exclude_regex = ["_test.go"]
+  exclude_unchanged = false
+  follow_symlink = false
+  full_bin = ""
+  include_dir = []
+  include_ext = ["go", "tpl", "tmpl", "html", "js", "css", "json", "yaml"]
+  include_file = [".env"]
+  kill_delay = "0s"
+  log = "build-errors.log"
+  poll = false
+  poll_interval = 0
+  post_cmd = []
+  pre_cmd = []
+  rerun = false
+  rerun_delay = 500
+  send_interrupt = false
+  stop_on_error = false
+
+[color]
+  app = ""
+  build = "yellow"
+  main = "magenta"
+  runner = "green"
+  watcher = "cyan"
+
+[log]
+  main_only = false
+  time = true
+
+[misc]
+  clean_on_exit = false
+
+[screen]
+  clear_on_rebuild = false
+  keep_scroll = true

.gitignore

@@ -28,5 +28,9 @@ go.work.sum
 .env
 
 # Editor/IDE
-# .idea/
-# .vscode/
+.idea/
+.vscode/
+.cursor/
+
+# Temporary files
+tmp/

cmd/uptime/main.go

@@ -1,3 +1,77 @@
 package main
 
-func main() {}
+import (
+	"context"
+	"log"
+	"os"
+	"text/tabwriter"
+
+	"github.com/joho/godotenv"
+	confire "github.com/rotationalio/confire/usage"
+	"github.com/urfave/cli/v3"
+	"go.rtnl.ai/uptime/pkg"
+	"go.rtnl.ai/uptime/pkg/config"
+	"go.rtnl.ai/uptime/pkg/server"
+)
+
+func main() {
+	godotenv.Load()
+
+	app := cli.Command{
+		Name:    "uptime",
+		Usage:   "Service status monitor for Rotational applications and systems.",
+		Version: pkg.Version(false),
+		Commands: []*cli.Command{
+			{
+				Name:     "serve",
+				Usage:    "Start the uptime server",
+				Action:   serve,
+				Category: "server",
+			},
+			{
+				Name:     "config",
+				Usage:    "Print the uptime configuration guide",
+				Action:   usage,
+				Category: "server",
+				Flags: []cli.Flag{
+					&cli.BoolFlag{
+						Name:    "list",
+						Aliases: []string{"l"},
+						Usage:   "print in list mode instead of table mode",
+					},
+				},
+			},
+		},
+	}
+
+	if err := app.Run(context.Background(), os.Args); err != nil {
+		log.Fatal(err)
+	}
+}
+
+func serve(ctx context.Context, c *cli.Command) (err error) {
+	var srv *server.Server
+	if srv, err = server.New(nil); err != nil {
+		return cli.Exit(err, 1)
+	}
+
+	if err = srv.Serve(); err != nil {
+		return cli.Exit(err, 1)
+	}
+	return nil
+}
+
+func usage(ctx context.Context, c *cli.Command) error {
+	tabs := tabwriter.NewWriter(os.Stdout, 1, 0, 4, ' ', 0)
+	format := confire.DefaultTableFormat
+	if c.Bool("list") {
+		format = confire.DefaultListFormat
+	}
+
+	var conf config.Config
+	if err := confire.Usagef(config.Prefix, &conf, tabs, format); err != nil {
+		return cli.Exit(err, 1)
+	}
+	tabs.Flush()
+	return nil
+}

go.mod

@@ -2,4 +2,52 @@ module go.rtnl.ai/uptime
 
 go 1.26.1
 
-require go.rtnl.ai/x v1.11.0
+require (
+	github.com/gin-gonic/gin v1.11.0
+	github.com/joho/godotenv v1.5.1
+	github.com/rotationalio/confire v1.1.0
+	github.com/urfave/cli/v3 v3.7.0
+	go.opentelemetry.io/otel v1.40.0
+	go.opentelemetry.io/otel/trace v1.40.0
+	go.rtnl.ai/gimlet v1.5.0
+	go.rtnl.ai/x v1.11.0
+)
+
+require (
+	github.com/bytedance/gopkg v0.1.3 // indirect
+	github.com/bytedance/sonic v1.15.0 // indirect
+	github.com/bytedance/sonic/loader v0.5.0 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/cloudwego/base64x v0.1.6 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.13 // indirect
+	github.com/gin-contrib/sse v1.1.0 // indirect
+	github.com/go-logr/logr v1.4.3 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.30.1 // indirect
+	github.com/goccy/go-json v0.10.5 // indirect
+	github.com/goccy/go-yaml v1.19.2 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
+	github.com/leodido/go-urn v1.4.0 // indirect
+	github.com/mattn/go-colorable v0.1.14 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.4 // indirect
+	github.com/quic-go/qpack v0.6.0 // indirect
+	github.com/quic-go/quic-go v0.59.0 // indirect
+	github.com/rs/zerolog v1.34.0 // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	github.com/ugorji/go/codec v1.3.1 // indirect
+	go.opentelemetry.io/auto/sdk v1.2.1 // indirect
+	go.opentelemetry.io/otel/metric v1.40.0 // indirect
+	go.rtnl.ai/ulid v1.2.0 // indirect
+	golang.org/x/arch v0.23.0 // indirect
+	golang.org/x/crypto v0.47.0 // indirect
+	golang.org/x/net v0.49.0 // indirect
+	golang.org/x/sys v0.40.0 // indirect
+	golang.org/x/text v0.33.0 // indirect
+	google.golang.org/protobuf v1.36.11 // indirect
+)

go.sum

@@ -1,2 +1,127 @@
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pkg/api/v1/api.go

@@ -0,0 +1,19 @@
+package api
+
+// Client defines the client interface for the API.
+type Client interface {
+	Status() (*StatusReply, error)
+}
+
+// Reply contains standard fields for generic API replies.
+type Reply struct {
+	Success bool   `json:"success"`
+	Error   string `json:"error,omitempty"`
+}
+
+// Returned on status requests.
+type StatusReply struct {
+	Status  string `json:"status"`
+	Uptime  string `json:"uptime,omitempty"`
+	Version string `json:"version,omitempty"`
+}

pkg/api/v1/errors.go

@@ -0,0 +1,44 @@
+package api
+
+import (
+	"encoding/json"
+	"fmt"
+)
+
+//===========================================================================
+// Standard Error Handling
+//===========================================================================
+
+var (
+	Unsuccessful  = Reply{Success: false}
+	NotFound      = Reply{Success: false, Error: "resource not found"}
+	NotAllowed    = Reply{Success: false, Error: "method not allowed"}
+	InternalError = Reply{Success: false, Error: "an internal error occurred"}
+)
+
+// Construct a new response for an error or simply return unsuccessful.
+func Error(err any) Reply {
+	if err == nil {
+		return Unsuccessful
+	}
+
+	rep := Reply{Success: false}
+	switch err := err.(type) {
+	case error:
+		rep.Error = err.Error()
+	case string:
+		rep.Error = err
+	case fmt.Stringer:
+		rep.Error = err.String()
+	case json.Marshaler:
+		data, e := err.MarshalJSON()
+		if e != nil {
+			panic(err)
+		}
+		rep.Error = string(data)
+	default:
+		rep.Error = "unhandled error response"
+	}
+
+	return rep
+}