mirror of
https://github.com/go-task/task.git
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151 lines
3.3 KiB
Go
151 lines
3.3 KiB
Go
package logger
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import (
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"bufio"
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"io"
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"os"
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"strconv"
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"strings"
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"github.com/fatih/color"
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"golang.org/x/exp/slices"
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"github.com/go-task/task/v3/errors"
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"github.com/go-task/task/v3/internal/term"
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)
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var (
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ErrPromptCancelled = errors.New("prompt cancelled")
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ErrNoTerminal = errors.New("no terminal")
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)
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type (
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Color func() PrintFunc
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PrintFunc func(io.Writer, string, ...any)
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)
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func Default() PrintFunc {
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return color.New(envColor("TASK_COLOR_RESET", color.Reset)).FprintfFunc()
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}
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func Blue() PrintFunc {
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return color.New(envColor("TASK_COLOR_BLUE", color.FgBlue)).FprintfFunc()
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}
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func Green() PrintFunc {
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return color.New(envColor("TASK_COLOR_GREEN", color.FgGreen)).FprintfFunc()
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}
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func Cyan() PrintFunc {
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return color.New(envColor("TASK_COLOR_CYAN", color.FgCyan)).FprintfFunc()
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}
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func Yellow() PrintFunc {
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return color.New(envColor("TASK_COLOR_YELLOW", color.FgYellow)).FprintfFunc()
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}
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func Magenta() PrintFunc {
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return color.New(envColor("TASK_COLOR_MAGENTA", color.FgMagenta)).FprintfFunc()
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}
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func Red() PrintFunc {
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return color.New(envColor("TASK_COLOR_RED", color.FgRed)).FprintfFunc()
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}
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func envColor(env string, defaultColor color.Attribute) color.Attribute {
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if os.Getenv("FORCE_COLOR") != "" {
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color.NoColor = false
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}
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override, err := strconv.Atoi(os.Getenv(env))
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if err == nil {
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return color.Attribute(override)
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}
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return defaultColor
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}
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// Logger is just a wrapper that prints stuff to STDOUT or STDERR,
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// with optional color.
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type Logger struct {
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Stdin io.Reader
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Stdout io.Writer
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Stderr io.Writer
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Verbose bool
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Color bool
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AssumeYes bool
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AssumeTerm bool // Used for testing
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}
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// Outf prints stuff to STDOUT.
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func (l *Logger) Outf(color Color, s string, args ...any) {
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l.FOutf(l.Stdout, color, s, args...)
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}
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// FOutf prints stuff to the given writer.
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func (l *Logger) FOutf(w io.Writer, color Color, s string, args ...any) {
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if len(args) == 0 {
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s, args = "%s", []any{s}
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}
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if !l.Color {
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color = Default
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}
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print := color()
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print(w, s, args...)
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}
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// VerboseOutf prints stuff to STDOUT if verbose mode is enabled.
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func (l *Logger) VerboseOutf(color Color, s string, args ...any) {
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if l.Verbose {
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l.Outf(color, s, args...)
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}
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}
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// Errf prints stuff to STDERR.
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func (l *Logger) Errf(color Color, s string, args ...any) {
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if len(args) == 0 {
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s, args = "%s", []any{s}
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}
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if !l.Color {
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color = Default
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}
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print := color()
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print(l.Stderr, s, args...)
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}
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// VerboseErrf prints stuff to STDERR if verbose mode is enabled.
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func (l *Logger) VerboseErrf(color Color, s string, args ...any) {
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if l.Verbose {
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l.Errf(color, s, args...)
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}
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}
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func (l *Logger) Prompt(color Color, prompt string, defaultValue string, continueValues ...string) error {
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if l.AssumeYes {
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l.Outf(color, "%s [assuming yes]\n", prompt)
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return nil
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}
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if !l.AssumeTerm && !term.IsTerminal() {
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return ErrNoTerminal
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}
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if len(continueValues) == 0 {
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return errors.New("no continue values provided")
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}
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l.Outf(color, "%s [%s/%s]\n", prompt, strings.ToLower(continueValues[0]), strings.ToUpper(defaultValue))
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reader := bufio.NewReader(l.Stdin)
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input, err := reader.ReadString('\n')
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if err != nil {
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return err
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}
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input = strings.TrimSpace(strings.ToLower(input))
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if !slices.Contains(continueValues, input) {
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return ErrPromptCancelled
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}
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return nil
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}
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