Smaller docker image

.gitignore

@@ -1,2 +1,4 @@
+build
 client/dist
 client/node_modules
+ca-certificates.crt

Dockerfile

@@ -1,10 +1,9 @@
-FROM golang
+FROM scratch
 
-ADD . /go/src/github.com/khlieng/name_pending
-
-RUN go install github.com/khlieng/name_pending
+ADD build/name_pending /
+ADD ca-certificates.crt /etc/ssl/certs/
 
 VOLUME ["/data"]
 
-ENTRYPOINT ["/go/bin/name_pending"]
+ENTRYPOINT ["/name_pending"]
 CMD ["-p=8080", "--dir=/data"]

Godeps/Godeps.json

@@ -67,6 +67,10 @@
 			"Comment": "v1.5.2",
 			"Rev": "d5929c67198951106f49f7ea425198d0f1a08f7f"
 		},
+		{
+			"ImportPath": "github.com/mitchellh/go-homedir",
+			"Rev": "1f6da4a72e57d4e7edd4a7295a585e0a3999a2d4"
+		},
 		{
 			"ImportPath": "github.com/mitchellh/mapstructure",
 			"Rev": "f7d28d5aeab42b9b95d2e6d6b956f73a290077fc"

Godeps/_workspace/src/github.com/mitchellh/go-homedir/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2013 Mitchell Hashimoto
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

Godeps/_workspace/src/github.com/mitchellh/go-homedir/README.md

@@ -0,0 +1,14 @@
+# go-homedir
+
+This is a Go library for detecting the user's home directory without
+the use of cgo, so the library can be used in cross-compilation environments.
+
+Usage is incredibly simple, just call `homedir.Dir()` to get the home directory
+for a user, and `homedir.Expand()` to expand the `~` in a path to the home
+directory.
+
+**Why not just use `os/user`?** The built-in `os/user` package requires
+cgo on Darwin systems. This means that any Go code that uses that package
+cannot cross compile. But 99% of the time the use for `os/user` is just to
+retrieve the home directory, which we can do for the current user without
+cgo. This library does that, enabling cross-compilation.

Godeps/_workspace/src/github.com/mitchellh/go-homedir/homedir.go

@@ -0,0 +1,84 @@
+package homedir
+
+import (
+	"bytes"
+	"errors"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"runtime"
+	"strings"
+)
+
+// Dir returns the home directory for the executing user.
+//
+// This uses an OS-specific method for discovering the home directory.
+// An error is returned if a home directory cannot be detected.
+func Dir() (string, error) {
+	if runtime.GOOS == "windows" {
+		return dirWindows()
+	}
+
+	// Unix-like system, so just assume Unix
+	return dirUnix()
+}
+
+// Expand expands the path to include the home directory if the path
+// is prefixed with `~`. If it isn't prefixed with `~`, the path is
+// returned as-is.
+func Expand(path string) (string, error) {
+	if len(path) == 0 {
+		return path, nil
+	}
+
+	if path[0] != '~' {
+		return path, nil
+	}
+
+	if len(path) > 1 && path[1] != '/' && path[1] != '\\' {
+		return "", errors.New("cannot expand user-specific home dir")
+	}
+
+	dir, err := Dir()
+	if err != nil {
+		return "", err
+	}
+
+	return filepath.Join(dir, path[1:]), nil
+}
+
+func dirUnix() (string, error) {
+	// First prefer the HOME environmental variable
+	if home := os.Getenv("HOME"); home != "" {
+		return home, nil
+	}
+
+	// If that fails, try the shell
+	var stdout bytes.Buffer
+	cmd := exec.Command("sh", "-c", "eval echo ~$USER")
+	cmd.Stdout = &stdout
+	if err := cmd.Run(); err != nil {
+		return "", err
+	}
+
+	result := strings.TrimSpace(stdout.String())
+	if result == "" {
+		return "", errors.New("blank output when reading home directory")
+	}
+
+	return result, nil
+}
+
+func dirWindows() (string, error) {
+	drive := os.Getenv("HOMEDRIVE")
+	path := os.Getenv("HOMEPATH")
+	home := drive + path
+	if drive == "" || path == "" {
+		home = os.Getenv("USERPROFILE")
+	}
+	if home == "" {
+		return "", errors.New("HOMEDRIVE, HOMEPATH, and USERPROFILE are blank")
+	}
+
+	return home, nil
+}

Godeps/_workspace/src/github.com/mitchellh/go-homedir/homedir_test.go

@@ -0,0 +1,98 @@
+package homedir
+
+import (
+	"fmt"
+	"os"
+	"os/user"
+	"testing"
+)
+
+func patchEnv(key, value string) func() {
+	bck := os.Getenv(key)
+	deferFunc := func() {
+		os.Setenv(key, bck)
+	}
+
+	os.Setenv(key, value)
+	return deferFunc
+}
+
+func TestDir(t *testing.T) {
+	u, err := user.Current()
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	dir, err := Dir()
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	if u.HomeDir != dir {
+		t.Fatalf("%#v != %#v", u.HomeDir, dir)
+	}
+}
+
+func TestExpand(t *testing.T) {
+	u, err := user.Current()
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	cases := []struct {
+		Input  string
+		Output string
+		Err    bool
+	}{
+		{
+			"/foo",
+			"/foo",
+			false,
+		},
+
+		{
+			"~/foo",
+			fmt.Sprintf("%s/foo", u.HomeDir),
+			false,
+		},
+
+		{
+			"",
+			"",
+			false,
+		},
+
+		{
+			"~",
+			u.HomeDir,
+			false,
+		},
+
+		{
+			"~foo/foo",
+			"",
+			true,
+		},
+	}
+
+	for _, tc := range cases {
+		actual, err := Expand(tc.Input)
+		if (err != nil) != tc.Err {
+			t.Fatalf("Input: %#v\n\nErr: %s", tc.Input, err)
+		}
+
+		if actual != tc.Output {
+			t.Fatalf("Input: %#v\n\nOutput: %#v", tc.Input, actual)
+		}
+	}
+
+	defer patchEnv("HOME", "/custom/path/")()
+	expected := "/custom/path/foo/bar"
+	actual, err := Expand("~/foo/bar")
+
+	if err != nil {
+		t.Errorf("No error is expected, got: %v", err)
+	} else if actual != "/custom/path/foo/bar" {
+		t.Errorf("Expected: %v; actual: %v", expected, actual)
+	}
+}

commands/name_pending.go

@@ -4,9 +4,9 @@ import (
 	"io/ioutil"
 	"log"
 	"os"
-	"os/user"
 	"path"
 
+	"github.com/khlieng/name_pending/Godeps/_workspace/src/github.com/mitchellh/go-homedir"
 	"github.com/khlieng/name_pending/Godeps/_workspace/src/github.com/spf13/cobra"
 	"github.com/khlieng/name_pending/Godeps/_workspace/src/github.com/spf13/viper"
 
@@ -74,10 +74,10 @@ func initConfig() {
 }
 
 func defaultDir() string {
-	currentUser, err := user.Current()
+	dir, err := homedir.Dir()
 	if err != nil {
 		log.Fatal(err)
 	}
 
-	return path.Join(currentUser.HomeDir, ".name_pending")
+	return path.Join(dir, ".name_pending")
 }

docker.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+cp /etc/ssl/certs/ca-certificates.crt .
+CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o build/name_pending
+docker build -t khlieng/name_pending .