TUN-4063: Cleanup dependencies between packages.

- Move packages the provide generic functionality (such as config) from `cmd` subtree to top level.
- Remove all dependencies on `cmd` subtree from top level packages.
- Consolidate all code dealing with token generation and transfer to a single cohesive package.

cmd/cloudflared/tunnel/cmd.go

@@ -15,9 +15,10 @@ import (
 
 	"github.com/cloudflare/cloudflared/cmd/cloudflared/buildinfo"
 	"github.com/cloudflare/cloudflared/cmd/cloudflared/cliutil"
-	"github.com/cloudflare/cloudflared/cmd/cloudflared/config"
+	"github.com/cloudflare/cloudflared/cmd/cloudflared/proxydns"
 	"github.com/cloudflare/cloudflared/cmd/cloudflared/ui"
 	"github.com/cloudflare/cloudflared/cmd/cloudflared/updater"
+	"github.com/cloudflare/cloudflared/config"
 	"github.com/cloudflare/cloudflared/connection"
 	"github.com/cloudflare/cloudflared/ingress"
 	"github.com/cloudflare/cloudflared/logger"
@@ -104,7 +105,7 @@ func Commands() []*cli.Command {
 		buildDeleteCommand(),
 		buildCleanupCommand(),
 		// for compatibility, allow following as tunnel subcommands
-		tunneldns.Command(true),
+		proxydns.Command(true),
 		cliutil.RemovedCommand("db-connect"),
 	}
 

cmd/cloudflared/tunnel/configuration.go

@@ -9,7 +9,7 @@ import (
 	"strings"
 
 	"github.com/cloudflare/cloudflared/cmd/cloudflared/buildinfo"
-	"github.com/cloudflare/cloudflared/cmd/cloudflared/config"
+	"github.com/cloudflare/cloudflared/config"
 	"github.com/cloudflare/cloudflared/connection"
 	"github.com/cloudflare/cloudflared/edgediscovery"
 	"github.com/cloudflare/cloudflared/h2mux"
@@ -207,7 +207,7 @@ func prepareTunnelConfig(
 			ClientID: clientUUID[:],
 			Features: dedup(features),
 			Version:  version,
-			Arch:     fmt.Sprintf("%s_%s", buildInfo.GoOS, buildInfo.GoArch),
+			Arch:     buildInfo.OSArch(),
 		}
 		ingressRules, err = ingress.ParseIngress(cfg)
 		if err != nil && err != ingress.ErrNoIngressRules {
@@ -272,7 +272,7 @@ func prepareTunnelConfig(
 
 	return &origin.TunnelConfig{
 		ConnectionConfig: connectionConfig,
-		BuildInfo:        buildInfo,
+		OSArch:           buildInfo.OSArch(),
 		ClientID:         clientID,
 		EdgeAddrs:        c.StringSlice("edge"),
 		HAConnections:    c.Int("ha-connections"),

cmd/cloudflared/tunnel/credential_finder.go

@@ -4,7 +4,7 @@ import (
 	"fmt"
 	"path/filepath"
 
-	"github.com/cloudflare/cloudflared/cmd/cloudflared/config"
+	"github.com/cloudflare/cloudflared/config"
 
 	"github.com/google/uuid"
 	"github.com/rs/zerolog"

cmd/cloudflared/tunnel/ingress_subcommands.go

@@ -5,7 +5,7 @@ import (
 	"net/url"
 
 	"github.com/cloudflare/cloudflared/cmd/cloudflared/cliutil"
-	"github.com/cloudflare/cloudflared/cmd/cloudflared/config"
+	"github.com/cloudflare/cloudflared/config"
 	"github.com/cloudflare/cloudflared/ingress"
 
 	"github.com/pkg/errors"

cmd/cloudflared/tunnel/login.go

@@ -13,9 +13,9 @@ import (
 	"github.com/urfave/cli/v2"
 
 	"github.com/cloudflare/cloudflared/cmd/cloudflared/cliutil"
-	"github.com/cloudflare/cloudflared/cmd/cloudflared/config"
-	"github.com/cloudflare/cloudflared/cmd/cloudflared/transfer"
+	"github.com/cloudflare/cloudflared/config"
 	"github.com/cloudflare/cloudflared/logger"
+	"github.com/cloudflare/cloudflared/token"
 )
 
 const (
@@ -56,7 +56,7 @@ func login(c *cli.Context) error {
 		return err
 	}
 
-	resourceData, err := transfer.Run(
+	resourceData, err := token.RunTransfer(
 		loginURL,
 		"cert",
 		"callback",

cmd/cloudflared/tunnel/subcommands.go

@@ -13,7 +13,6 @@ import (
 	"text/tabwriter"
 	"time"
 
-	"github.com/cloudflare/cloudflared/cmd/cloudflared/updater"
 	"github.com/google/uuid"
 	"github.com/mitchellh/go-homedir"
 	"github.com/pkg/errors"
@@ -23,7 +22,8 @@ import (
 	"gopkg.in/yaml.v2"
 
 	"github.com/cloudflare/cloudflared/cmd/cloudflared/cliutil"
-	"github.com/cloudflare/cloudflared/cmd/cloudflared/config"
+	"github.com/cloudflare/cloudflared/cmd/cloudflared/updater"
+	"github.com/cloudflare/cloudflared/config"
 	"github.com/cloudflare/cloudflared/connection"
 	"github.com/cloudflare/cloudflared/tunnelstore"
 )