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Added template functions for multi-line Description formatting.

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This commit is contained in:
Steven Imle 2020-08-17 16:02:40 -04:00
parent d2d2098085
commit be9c037806
3 changed files with 37 additions and 9 deletions
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24
help.go
View File

@ -72,13 +72,13 @@ func ShowAppHelpAndExit(c *Context, exitCode int) {
// ShowAppHelp is an action that displays the help.
func ShowAppHelp(c *Context) error {
template := c.App.CustomAppHelpTemplate
if template == "" {
template = AppHelpTemplate
tpl := c.App.CustomAppHelpTemplate
if tpl == "" {
tpl = AppHelpTemplate
}
if c.App.ExtraInfo == nil {
HelpPrinter(c.App.Writer, template, c.App)
HelpPrinter(c.App.Writer, tpl, c.App)
return nil
}
@ -87,7 +87,7 @@ func ShowAppHelp(c *Context) error {
"ExtraInfo": c.App.ExtraInfo,
}
}
HelpPrinterCustom(c.App.Writer, template, c.App, customAppData())
HelpPrinterCustom(c.App.Writer, tpl, c.App, customAppData())
return nil
}
@ -263,7 +263,10 @@ func ShowCommandCompletions(ctx *Context, command string) {
// allow using arbitrary functions in template rendering.
func printHelpCustom(out io.Writer, templ string, data interface{}, customFuncs map[string]interface{}) {
funcMap := template.FuncMap{
"join": strings.Join,
"join": strings.Join,
"indent": indent,
"nindent": nindent,
"trim": strings.TrimSpace,
}
for key, value := range customFuncs {
funcMap[key] = value
@ -366,3 +369,12 @@ func checkCommandCompletions(c *Context, name string) bool {
ShowCommandCompletions(c, name)
return true
}
func indent(spaces int, v string) string {
pad := strings.Repeat(" ", spaces)
return pad + strings.Replace(v, "\n", "\n"+pad, -1)
}
func nindent(spaces int, v string) string {
return "\n" + indent(spaces, v)
}

16
help_test.go
View File

@ -54,6 +54,22 @@ func Test_ShowAppHelp_HideVersion(t *testing.T) {
}
}
func Test_ShowAppHelp_MultiLineDescription(t *testing.T) {
output := new(bytes.Buffer)
app := &App{Writer: output}
app.HideVersion = true
app.Description = "multi\n line"
c := NewContext(app, nil, nil)
_ = ShowAppHelp(c)
if !bytes.Contains(output.Bytes(), []byte("DESCRIPTION:\n multi\n line")) {
t.Errorf("expected\n%s\nto include\n%s", output.String(), "DESCRIPTION:\n multi\n line")
}
}
func Test_Help_Custom_Flags(t *testing.T) {
oldFlag := HelpFlag
defer func() {

6
template.go
View File

@ -13,7 +13,7 @@ VERSION:
{{.Version}}{{end}}{{end}}{{if .Description}}
DESCRIPTION:
{{.Description}}{{end}}{{if len .Authors}}
{{.Description | nindent 3 | trim}}{{end}}{{if len .Authors}}
AUTHOR{{with $length := len .Authors}}{{if ne 1 $length}}S{{end}}{{end}}:
{{range $index, $author := .Authors}}{{if $index}}
@ -45,7 +45,7 @@ CATEGORY:
{{.Category}}{{end}}{{if .Description}}
DESCRIPTION:
{{.Description}}{{end}}{{if .VisibleFlags}}
{{.Description | nindent 3 | trim}}{{end}}{{if .VisibleFlags}}
OPTIONS:
{{range .VisibleFlags}}{{.}}
@ -62,7 +62,7 @@ USAGE:
{{if .UsageText}}{{.UsageText}}{{else}}{{.HelpName}} command{{if .VisibleFlags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{end}}{{if .Description}}
DESCRIPTION:
{{.Description}}{{end}}
{{.Description | nindent 3 | trim}}{{end}}
COMMANDS:{{range .VisibleCategories}}{{if .Name}}
{{.Name}}:{{range .VisibleCommands}}