From 0c4f21fee36b73c54c9f514978e8927b8564d6c8 Mon Sep 17 00:00:00 2001
From: Daniel Nephin <dnephin@docker.com>
Date: Fri, 19 Feb 2016 17:42:51 -0500
Subject: [PATCH] Build two binaries client and daemon.

Add a proxy to support 'docker daemon'
Fix configFile option, and remove a test that is no longer relevant.
Remove daemon build tag.
Remove DOCKER_CLIENTONLY from build scripts.

Signed-off-by: Daniel Nephin <dnephin@docker.com>

Change docker-daemon to dockerd.

Signed-off-by: Daniel Nephin <dnephin@docker.com>
---
 flags/common.go | 110 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 flags/common.go

diff --git a/flags/common.go b/flags/common.go
new file mode 100644
index 0000000000..d23696979b
--- /dev/null
+++ b/flags/common.go
@@ -0,0 +1,110 @@
+package flags
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/Sirupsen/logrus"
+	"github.com/docker/docker/cli"
+	"github.com/docker/docker/cliconfig"
+	"github.com/docker/docker/opts"
+	flag "github.com/docker/docker/pkg/mflag"
+	"github.com/docker/go-connections/tlsconfig"
+)
+
+const (
+	// DefaultTrustKeyFile is the default filename for the trust key
+	DefaultTrustKeyFile = "key.json"
+	// DefaultCaFile is the default filename for the CA pem file
+	DefaultCaFile = "ca.pem"
+	// DefaultKeyFile is the default filename for the key pem file
+	DefaultKeyFile = "key.pem"
+	// DefaultCertFile is the default filename for the cert pem file
+	DefaultCertFile = "cert.pem"
+	// TLSVerifyKey is the default flag name for the tls verification option
+	TLSVerifyKey = "tlsverify"
+)
+
+var (
+	dockerCertPath  = os.Getenv("DOCKER_CERT_PATH")
+	dockerTLSVerify = os.Getenv("DOCKER_TLS_VERIFY") != ""
+)
+
+// InitCommonFlags initializes flags common to both client and daemon
+func InitCommonFlags() *cli.CommonFlags {
+	var commonFlags = &cli.CommonFlags{FlagSet: new(flag.FlagSet)}
+
+	if dockerCertPath == "" {
+		dockerCertPath = cliconfig.ConfigDir()
+	}
+
+	commonFlags.PostParse = func() { postParseCommon(commonFlags) }
+
+	cmd := commonFlags.FlagSet
+
+	cmd.BoolVar(&commonFlags.Debug, []string{"D", "-debug"}, false, "Enable debug mode")
+	cmd.StringVar(&commonFlags.LogLevel, []string{"l", "-log-level"}, "info", "Set the logging level")
+	cmd.BoolVar(&commonFlags.TLS, []string{"-tls"}, false, "Use TLS; implied by --tlsverify")
+	cmd.BoolVar(&commonFlags.TLSVerify, []string{"-tlsverify"}, dockerTLSVerify, "Use TLS and verify the remote")
+
+	// TODO use flag flag.String([]string{"i", "-identity"}, "", "Path to libtrust key file")
+
+	var tlsOptions tlsconfig.Options
+	commonFlags.TLSOptions = &tlsOptions
+	cmd.StringVar(&tlsOptions.CAFile, []string{"-tlscacert"}, filepath.Join(dockerCertPath, DefaultCaFile), "Trust certs signed only by this CA")
+	cmd.StringVar(&tlsOptions.CertFile, []string{"-tlscert"}, filepath.Join(dockerCertPath, DefaultCertFile), "Path to TLS certificate file")
+	cmd.StringVar(&tlsOptions.KeyFile, []string{"-tlskey"}, filepath.Join(dockerCertPath, DefaultKeyFile), "Path to TLS key file")
+
+	cmd.Var(opts.NewNamedListOptsRef("hosts", &commonFlags.Hosts, opts.ValidateHost), []string{"H", "-host"}, "Daemon socket(s) to connect to")
+	return commonFlags
+}
+
+func postParseCommon(commonFlags *cli.CommonFlags) {
+	cmd := commonFlags.FlagSet
+
+	SetDaemonLogLevel(commonFlags.LogLevel)
+
+	// Regardless of whether the user sets it to true or false, if they
+	// specify --tlsverify at all then we need to turn on tls
+	// TLSVerify can be true even if not set due to DOCKER_TLS_VERIFY env var, so we need
+	// to check that here as well
+	if cmd.IsSet("-"+TLSVerifyKey) || commonFlags.TLSVerify {
+		commonFlags.TLS = true
+	}
+
+	if !commonFlags.TLS {
+		commonFlags.TLSOptions = nil
+	} else {
+		tlsOptions := commonFlags.TLSOptions
+		tlsOptions.InsecureSkipVerify = !commonFlags.TLSVerify
+
+		// Reset CertFile and KeyFile to empty string if the user did not specify
+		// the respective flags and the respective default files were not found.
+		if !cmd.IsSet("-tlscert") {
+			if _, err := os.Stat(tlsOptions.CertFile); os.IsNotExist(err) {
+				tlsOptions.CertFile = ""
+			}
+		}
+		if !cmd.IsSet("-tlskey") {
+			if _, err := os.Stat(tlsOptions.KeyFile); os.IsNotExist(err) {
+				tlsOptions.KeyFile = ""
+			}
+		}
+	}
+}
+
+// SetDaemonLogLevel sets the logrus logging level
+// TODO: this is a bad name, it applies to the client as well.
+func SetDaemonLogLevel(logLevel string) {
+	if logLevel != "" {
+		lvl, err := logrus.ParseLevel(logLevel)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Unable to parse logging level: %s\n", logLevel)
+			os.Exit(1)
+		}
+		logrus.SetLevel(lvl)
+	} else {
+		logrus.SetLevel(logrus.InfoLevel)
+	}
+}