feat: add shell info segment

Gopkg.lock

@@ -26,6 +26,15 @@
   revision = "cd55aeac72a19c6d5826061d5125d72b252a12eb"
   version = "v0.3.11"
 
+[[projects]]
+  digest = "1:69530a15507094162be4eb3180c1d68b787177e8c9bbe76d4da40d44d6586f6f"
+  name = "github.com/mitchellh/go-ps"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "147ff83818ae939913b2e20b91ae3cd6c391771c"
+  source = "github.com/mitchellh/go-ps"
+  version = "v1.0.0"
+
 [[projects]]
   digest = "1:0028cb19b2e4c3112225cd871870f2d9cf49b9b4276531f03438a88e94be86fe"
   name = "github.com/pmezard/go-difflib"
@@ -113,6 +122,7 @@
   input-imports = [
     "github.com/distatus/battery",
     "github.com/imdario/mergo",
+    "github.com/mitchellh/go-ps",
     "github.com/stretchr/testify/assert",
     "github.com/stretchr/testify/mock",
     "golang.org/x/sys/windows",

Gopkg.toml

@@ -47,6 +47,11 @@
   version = "v0.1.1"
   source = "github.com/stretchr/objx"
 
+[[constraint]]
+  name = "github.com/mitchellh/go-ps"
+  version = "v1.0.0"
+  source = "github.com/mitchellh/go-ps"
+
 [[constraint]]
   name = "github.com/distatus/battery"
   branch = "master"

Themes/jandedobbeleer.json

@@ -70,6 +70,15 @@
             "postfix": " "
           }
         },
+        {
+          "type": "shell",
+          "style": "powerline",
+          "foreground": "#ffffff",
+          "background": "#0077c2",
+          "properties": {
+            "prefix": "  "
+          }
+        },
         {
           "type": "exit",
           "style": "diamond",

environment.go

@@ -9,6 +9,7 @@ import (
 	"strings"
 
 	"github.com/distatus/battery"
+	ps "github.com/mitchellh/go-ps"
 )
 
 type environmentInfo interface {
@@ -25,6 +26,7 @@ type environmentInfo interface {
 	lastErrorCode() int
 	getArgs() *args
 	getBatteryInfo() (*battery.Battery, error)
+	getParentProcess() (ps.Process, error)
 }
 
 type environment struct {
@@ -93,6 +95,11 @@ func (env *environment) getBatteryInfo() (*battery.Battery, error) {
 	return battery.Get(0)
 }
 
+func (env *environment) getParentProcess() (ps.Process, error) {
+	pid := os.Getppid()
+	return ps.FindProcess(pid)
+}
+
 func cleanHostName(hostName string) string {
 	garbage := []string{
 		".lan",

segment.go

@@ -48,6 +48,8 @@ const (
 	Battery SegmentType = "battery"
 	//Spotify writes the Spotify status for Mac
 	Spotify SegmentType = "spotify"
+	//ShellInfo writes which shell we're currently in
+	ShellInfo SegmentType = "shell"
 	//Powerline writes it Powerline style
 	Powerline SegmentStyle = "powerline"
 	//Plain writes it without ornaments
@@ -77,6 +79,7 @@ func (segment *Segment) mapSegmentWithWriter(env environmentInfo) *properties {
 		Cmd:       &command{},
 		Battery:   &batt{},
 		Spotify:   &spotify{},
+		ShellInfo: &shell{},
 	}
 	if writer, ok := functions[segment.Type]; ok {
 		props := &properties{

segment_path_test.go

@@ -7,6 +7,7 @@ import (
 	"testing"
 
 	"github.com/distatus/battery"
+	ps "github.com/mitchellh/go-ps"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/mock"
 )
@@ -80,6 +81,11 @@ func (env *MockedEnvironment) getBatteryInfo() (*battery.Battery, error) {
 	return args.Get(0).(*battery.Battery), args.Error(1)
 }
 
+func (env *MockedEnvironment) getParentProcess() (ps.Process, error) {
+	args := env.Called(nil)
+	return args.Get(0).(ps.Process), args.Error(1)
+}
+
 func TestWorkingDir(t *testing.T) {
 	want := "/usr/err"
 	env := new(MockedEnvironment)

segment_shell.go

@@ -0,0 +1,24 @@
+package main
+
+type shell struct {
+	props *properties
+	env   environmentInfo
+}
+
+func (s *shell) enabled() bool {
+	return true
+}
+
+func (s *shell) string() string {
+	p, err := s.env.getParentProcess()
+
+	if err != nil {
+		return "unknown"
+	}
+	return p.Executable()
+}
+
+func (s *shell) init(props *properties, env environmentInfo) {
+	s.props = props
+	s.env = env
+}

segment_shell_test.go

@@ -0,0 +1,59 @@
+package main
+
+import (
+	"errors"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/mock"
+)
+
+type process struct {
+	mock.Mock
+}
+
+// Pid is the process ID for this process.
+func (p *process) Pid() int {
+	args := p.Called(nil)
+	return args.Int(0)
+}
+
+// PPid is the parent process ID for this process.
+func (p *process) PPid() int {
+	args := p.Called(nil)
+	return args.Int(0)
+}
+
+// Executable name running this process. This is not a path to the
+// executable.
+func (p *process) Executable() string {
+	args := p.Called(nil)
+	return args.String(0)
+}
+
+func TestWriteCurrentShell(t *testing.T) {
+	expected := "zsh"
+	env := new(MockedEnvironment)
+	process := new(process)
+	process.On("Executable", nil).Return(expected)
+	env.On("getParentProcess", nil).Return(process, nil)
+	props := &properties{}
+	s := &shell{
+		env:   env,
+		props: props,
+	}
+	assert.Equal(t, "zsh", s.string())
+}
+
+func TestWriteCurrentShellError(t *testing.T) {
+	err := errors.New("Oh no, what shell is this?")
+	env := new(MockedEnvironment)
+	process := new(process)
+	env.On("getParentProcess", nil).Return(process, err)
+	props := &properties{}
+	s := &shell{
+		env:   env,
+		props: props,
+	}
+	assert.Equal(t, "unknown", s.string())
+}