package templates // import "github.com/docker/docker/daemon/logger/templates" import ( "bytes" "encoding/json" "strings" "text/template" ) // basicFunctions are the set of initial // functions provided to every template. var basicFunctions = template.FuncMap{ "json": func(v interface{}) string { buf := &bytes.Buffer{} enc := json.NewEncoder(buf) enc.SetEscapeHTML(false) enc.Encode(v) // Remove the trailing new line added by the encoder return strings.TrimSpace(buf.String()) }, "split": strings.Split, "join": strings.Join, "title": strings.Title, //nolint:staticcheck // SA1019: strings.Title is deprecated: The rule Title uses for word boundaries does not handle Unicode punctuation properly. Use golang.org/x/text/cases instead. "lower": strings.ToLower, "upper": strings.ToUpper, "pad": padWithSpace, "truncate": truncateWithLength, } // NewParse creates a new tagged template with the basic functions // and parses the given format. func NewParse(tag, format string) (*template.Template, error) { return template.New(tag).Funcs(basicFunctions).Parse(format) } // padWithSpace adds whitespace to the input if the input is non-empty func padWithSpace(source string, prefix, suffix int) string { if source == "" { return source } return strings.Repeat(" ", prefix) + source + strings.Repeat(" ", suffix) } // truncateWithLength truncates the source string up to the length provided by the input func truncateWithLength(source string, length int) string { if len(source) < length { return source } return source[:length] }