refactor: move more commands to internal/cmd (#207)

* refactor: move more commands to internal/cmd

Part of https://github.com/ooni/probe/issues/1335.

We would like all commands to be at the same level of engine
rather than inside engine (now that we can do it).

* fix: update .gitignore

* refactor: also move jafar outside engine

* We should be good now?

internal/cmd/oohelper/oohelper.go

@@ -0,0 +1,48 @@
+// Command oohelper contains a simple command line
+// client for the Web Connectivity test helper.
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"flag"
+	"fmt"
+	"net/http"
+
+	"github.com/apex/log"
+	"github.com/ooni/probe-cli/v3/internal/cmd/oohelper/internal"
+	"github.com/ooni/probe-cli/v3/internal/engine/runtimex"
+	"github.com/ooni/probe-cli/v3/internal/engine/netx"
+)
+
+var (
+	ctx, cancel = context.WithCancel(context.Background())
+	debug       = flag.Bool("debug", false, "Toggle debug mode")
+	httpClient  *http.Client
+	resolver    netx.Resolver
+	server      = flag.String("server", "https://wcth.ooni.io/", "URL of the test helper")
+	target      = flag.String("target", "", "Target URL for the test helper")
+)
+
+func init() {
+	txp := netx.NewHTTPTransport(netx.Config{Logger: log.Log})
+	httpClient = &http.Client{Transport: txp}
+	resolver = netx.NewResolver(netx.Config{Logger: log.Log})
+}
+
+func main() {
+	logmap := map[bool]log.Level{
+		true:  log.DebugLevel,
+		false: log.InfoLevel,
+	}
+	flag.Parse()
+	log.SetLevel(logmap[*debug])
+	clnt := internal.OOClient{HTTPClient: httpClient, Resolver: resolver}
+	config := internal.OOConfig{TargetURL: *target, ServerURL: *server}
+	defer cancel()
+	cresp, err := clnt.Do(ctx, config)
+	runtimex.PanicOnError(err, "client.Do failed")
+	data, err := json.MarshalIndent(cresp, "", "    ")
+	runtimex.PanicOnError(err, "json.MarshalIndent failed")
+	fmt.Printf("%s\n", string(data))
+}