Implementing lipgloss into help/usage output
it took a long long time and doesn't seem to look very good when using borders.main
Nick Dumas
2 years ago
parent
dd222fe847
commit
a0461d9e6b
@ -0,0 +1,124 @@
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package gloss
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import (
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"bytes"
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"fmt"
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"io"
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"reflect"
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"strconv"
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"strings"
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"text/template"
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"unicode"
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"github.com/charmbracelet/lipgloss"
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"github.com/spf13/cobra"
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)
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func CharmUsage(c *cobra.Command) error {
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var b bytes.Buffer
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err := tmpl(&b, c.UsageTemplate(), c)
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if err != nil {
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c.PrintErrln(err)
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return err
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}
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pretty(c.ErrOrStderr(), b.String())
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return nil
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}
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func CharmHelp(c *cobra.Command, a []string) {
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var b bytes.Buffer
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// The help should be sent to stdout
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// See https://github.com/spf13/cobra/issues/1002
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err := tmpl(&b, c.HelpTemplate(), c)
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if err != nil {
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c.PrintErrln(err)
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}
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pretty(c.ErrOrStderr(), b.String())
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}
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var BaseStyle = lipgloss.NewStyle().Bold(true).Width(80)
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func pretty(w io.Writer, s string) {
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fmt.Fprintf(w, "%s\n", BaseStyle.Render(s))
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}
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var templateFuncs = template.FuncMap{
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"trim": strings.TrimSpace,
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"trimRightSpace": trimRightSpace,
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"trimTrailingWhitespaces": trimRightSpace,
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"appendIfNotPresent": appendIfNotPresent,
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"rpad": rpad,
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"gt": Gt,
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"eq": Eq,
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}
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func Gt(a interface{}, b interface{}) bool {
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var left, right int64
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av := reflect.ValueOf(a)
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switch av.Kind() {
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case reflect.Array, reflect.Chan, reflect.Map, reflect.Slice:
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left = int64(av.Len())
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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left = av.Int()
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case reflect.String:
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left, _ = strconv.ParseInt(av.String(), 10, 64)
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}
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bv := reflect.ValueOf(b)
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switch bv.Kind() {
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case reflect.Array, reflect.Chan, reflect.Map, reflect.Slice:
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right = int64(bv.Len())
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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right = bv.Int()
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case reflect.String:
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right, _ = strconv.ParseInt(bv.String(), 10, 64)
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}
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return left > right
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}
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// FIXME Eq is unused by cobra and should be removed in a version 2. It exists only for compatibility with users of cobra.
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// Eq takes two types and checks whether they are equal. Supported types are int and string. Unsupported types will panic.
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func Eq(a interface{}, b interface{}) bool {
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av := reflect.ValueOf(a)
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bv := reflect.ValueOf(b)
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switch av.Kind() {
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case reflect.Array, reflect.Chan, reflect.Map, reflect.Slice:
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panic("Eq called on unsupported type")
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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return av.Int() == bv.Int()
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case reflect.String:
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return av.String() == bv.String()
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}
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return false
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}
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func trimRightSpace(s string) string {
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return strings.TrimRightFunc(s, unicode.IsSpace)
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}
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// appendIfNotPresent will append stringToAppend to the end of s, but only if it's not yet present in s.
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func appendIfNotPresent(s, stringToAppend string) string {
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if strings.Contains(s, stringToAppend) {
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return s
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}
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return s + " " + stringToAppend
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}
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// rpad adds padding to the right of a string.
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func rpad(s string, padding int) string {
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formattedString := fmt.Sprintf("%%-%ds", padding)
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return fmt.Sprintf(formattedString, s)
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}
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// tmpl executes the given template text on data, writing the result to w.
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func tmpl(w io.Writer, text string, data interface{}) error {
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t := template.New("top")
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t.Funcs(templateFuncs)
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template.Must(t.Parse(text))
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return t.Execute(w, data)
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}
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