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feat: gum choose
, pick from a list of choices
gum choose allows the user to be prompted for a choice from a list of choices. For example, let's ask the user to pick a card from a deck. gum choose --height 15 {Ace,King,Queen,Jack,Ten,Nine,Eight,Seven,Six,Five,Four,Three,Two}" of "{Spades,Hearts,Clubs,Diamonds}
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README.md
13
README.md
@ -28,7 +28,7 @@ gum spin --title "Taking a nap..." --color 212 -- sleep 5
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find . -type f | gum filter
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```
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The following example is running from a [single Bash script](./examples/demo.sh).
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The following example is running from a [single bash script](./examples/demo.sh).
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<img src="https://stuff.charm.sh/gum/gum.gif" width="900" alt="Shell running the Gum examples/demo.sh script">
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@ -101,6 +101,17 @@ echo Cherry >> flavors.text
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cat flavors.text | gum filter > selection.text
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```
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#### Choose
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Ask your users to choose an option from a list of choices.
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```bash
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echo "Pick a card, any card..."
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CARD=$(gum choose --height 15 {{A,K,Q,J},{10..2}}" "{♠,♥,♣,♦})
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echo "Was your card the $CARD?"
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```
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#### Progress
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Display a progress bar while loading. The following command will display a
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101
choose/choose.go
Normal file
101
choose/choose.go
Normal file
@ -0,0 +1,101 @@
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package choose
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import (
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"fmt"
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"io"
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"github.com/charmbracelet/bubbles/list"
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tea "github.com/charmbracelet/bubbletea"
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"github.com/charmbracelet/lipgloss"
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)
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type model struct {
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choice string
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height int
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indicator string
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indicatorStyle lipgloss.Style
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itemStyle lipgloss.Style
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items []item
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list list.Model
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options []string
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quitting bool
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selectedItemStyle lipgloss.Style
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}
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type item string
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func (i item) FilterValue() string { return "" }
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type itemDelegate struct {
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indicator string
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indicatorStyle lipgloss.Style
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itemStyle lipgloss.Style
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selectedItemStyle lipgloss.Style
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}
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func (d itemDelegate) Height() int { return 1 }
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func (d itemDelegate) Spacing() int { return 0 }
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func (d itemDelegate) Update(msg tea.Msg, m *list.Model) tea.Cmd { return nil }
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func (d itemDelegate) Render(w io.Writer, m list.Model, index int, listItem list.Item) {
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i, ok := listItem.(item)
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if !ok {
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return
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}
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str := fmt.Sprintf("%s", i)
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fn := d.itemStyle.Render
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if index == m.Index() {
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fn = func(s string) string {
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return d.indicatorStyle.Render(d.indicator) + d.selectedItemStyle.Render(s)
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}
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}
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fmt.Fprintf(w, fn(str))
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}
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func (m model) Init() tea.Cmd { return nil }
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func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
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switch msg := msg.(type) {
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case tea.WindowSizeMsg:
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m.list.SetWidth(msg.Width)
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return m, nil
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case tea.KeyMsg:
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switch keypress := msg.String(); keypress {
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case "ctrl+c":
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m.quitting = true
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return m, tea.Quit
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case "enter":
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m.quitting = true
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i, ok := m.list.SelectedItem().(item)
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if ok {
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m.choice = string(i)
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}
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return m, tea.Quit
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}
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}
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var cmd tea.Cmd
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m.list, cmd = m.list.Update(msg)
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return m, cmd
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}
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func (m model) View() string {
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if m.quitting {
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return ""
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}
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return m.list.View()
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}
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func clamp(min, max, val int) int {
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if val < min {
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return min
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}
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if val > max {
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return max
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}
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return val
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}
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47
choose/command.go
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47
choose/command.go
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package choose
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import (
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"fmt"
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"os"
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"github.com/charmbracelet/bubbles/list"
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tea "github.com/charmbracelet/bubbletea"
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"github.com/charmbracelet/lipgloss"
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"github.com/mattn/go-runewidth"
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)
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// Run provides a shell script interface for choosing between different through
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// options.
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func (o Options) Run() {
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items := []list.Item{}
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for _, option := range o.Options {
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if option == "" {
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continue
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}
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items = append(items, item(option))
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}
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const defaultWidth = 20
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id := itemDelegate{
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indicator: o.Indicator,
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indicatorStyle: lipgloss.NewStyle().Foreground(lipgloss.Color(o.IndicatorColor)),
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itemStyle: lipgloss.NewStyle().Padding(0, runewidth.StringWidth(o.Indicator)).Foreground(lipgloss.Color(o.UnselectedColor)),
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selectedItemStyle: lipgloss.NewStyle().Foreground(lipgloss.Color(o.SelectedColor)),
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}
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l := list.New(items, id, defaultWidth, o.Height)
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l.SetShowTitle(false)
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l.SetShowStatusBar(false)
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l.SetFilteringEnabled(false)
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l.SetShowHelp(false)
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l.SetShowPagination(!o.HidePagination)
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m, err := tea.NewProgram(model{list: l}, tea.WithOutput(os.Stderr)).StartReturningModel()
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if err != nil {
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fmt.Println("Error running program:", err)
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os.Exit(1)
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}
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fmt.Println(m.(model).choice)
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}
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13
choose/options.go
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13
choose/options.go
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package choose
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// Options is the customization options for the choose command.
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type Options struct {
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Options []string `arg:"" optional:"" help:"Options to choose from."`
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Height int `help:"Height of the list." default:"10"`
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HidePagination bool `help:"Hide pagination." default:"false"`
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Indicator string `help:"Prefix to show on selected item" default:"> "`
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IndicatorColor string `help:"Indicator foreground color" default:"212"`
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SelectedColor string `help:"Selected item foreground color" default:"212"`
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UnselectedColor string `help:"Unselected item foreground color" default:""`
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}
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14
gum.go
14
gum.go
@ -1,6 +1,7 @@
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package main
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import (
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"github.com/charmbracelet/gum/choose"
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"github.com/charmbracelet/gum/filter"
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"github.com/charmbracelet/gum/input"
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"github.com/charmbracelet/gum/join"
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@ -45,6 +46,19 @@ type Gum struct {
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//
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Filter filter.Options `cmd:"" help:"Filter options through fuzzy search."`
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// Choose provides an interface to choose one option from a given list of
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// options. The options can be provided as (new-line separated) stdin or a
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// list of arguments.
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//
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// It is different from the filter command as it does not provide a fuzzy
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// finding input, so it is best used for smaller lists of options.
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//
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// Let's pick from a list of gum flavors:
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//
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// $ gum choose "Strawberry" "Banana" "Cherry"
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//
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Choose choose.Options `cmd:"" help:"Choose from a list of options."`
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// Spin provides a shell script interface for the spinner bubble.
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// https://github.com/charmbracelet/bubbles/tree/master/spinner
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//
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8
main.go
8
main.go
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package main
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import (
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"strings"
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"github.com/alecthomas/kong"
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"github.com/charmbracelet/gum/internal/stdin"
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"github.com/charmbracelet/lipgloss"
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@ -25,6 +27,12 @@ func main() {
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gum.Write.Run()
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case "filter":
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gum.Filter.Run()
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case "choose":
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input, _ := stdin.Read()
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gum.Choose.Options = strings.Split(input, "\n")
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gum.Choose.Run()
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case "choose <options>":
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gum.Choose.Run()
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case "spin <command>":
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gum.Spin.Run()
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case "progress":
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