Simplify bash_completions.go
Improve test coverage from 80% to 85%.
This commit is contained in:
Albert Nigmatzianov
parent
4cdb38c072
commit
de6b168d98
@ -1,6 +1,7 @@
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package cobra
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import (
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"bytes"
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"fmt"
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"io"
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"os"
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@ -18,12 +19,9 @@ const (
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BashCompSubdirsInDir = "cobra_annotation_bash_completion_subdirs_in_dir"
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)
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func preamble(out io.Writer, name string) error {
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_, err := fmt.Fprintf(out, "# bash completion for %-36s -*- shell-script -*-\n", name)
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if err != nil {
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return err
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}
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preamStr := `
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func writePreamble(buf *bytes.Buffer, name string) {
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buf.WriteString(fmt.Sprintf("# bash completion for %-36s -*- shell-script -*-\n", name))
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buf.WriteString(`
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__debug()
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{
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if [[ -n ${BASH_COMP_DEBUG_FILE} ]]; then
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@ -247,18 +245,13 @@ __handle_word()
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__handle_word
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}
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`
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_, err = fmt.Fprint(out, preamStr)
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return err
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`)
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}
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func postscript(w io.Writer, name string) error {
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func writePostscript(buf *bytes.Buffer, name string) {
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name = strings.Replace(name, ":", "__", -1)
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_, err := fmt.Fprintf(w, "__start_%s()\n", name)
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if err != nil {
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return err
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}
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_, err = fmt.Fprintf(w, `{
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buf.WriteString(fmt.Sprintf("__start_%s()\n", name))
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buf.WriteString(fmt.Sprintf(`{
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local cur prev words cword
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declare -A flaghash 2>/dev/null || :
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if declare -F _init_completion >/dev/null 2>&1; then
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@ -282,197 +275,132 @@ func postscript(w io.Writer, name string) error {
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__handle_word
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}
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`, name)
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if err != nil {
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return err
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}
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_, err = fmt.Fprintf(w, `if [[ $(type -t compopt) = "builtin" ]]; then
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`, name))
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buf.WriteString(fmt.Sprintf(`if [[ $(type -t compopt) = "builtin" ]]; then
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complete -o default -F __start_%s %s
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else
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complete -o default -o nospace -F __start_%s %s
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fi
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`, name, name, name, name)
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if err != nil {
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return err
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}
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_, err = fmt.Fprintf(w, "# ex: ts=4 sw=4 et filetype=sh\n")
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return err
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`, name, name, name, name))
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buf.WriteString("# ex: ts=4 sw=4 et filetype=sh\n")
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}
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func writeCommands(cmd *Command, w io.Writer) error {
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if _, err := fmt.Fprintf(w, " commands=()\n"); err != nil {
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return err
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}
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func writeCommands(buf *bytes.Buffer, cmd *Command) {
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buf.WriteString(" commands=()\n")
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for _, c := range cmd.Commands() {
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if !c.IsAvailableCommand() || c == cmd.helpCommand {
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continue
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}
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if _, err := fmt.Fprintf(w, " commands+=(%q)\n", c.Name()); err != nil {
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return err
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}
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buf.WriteString(fmt.Sprintf(" commands+=(%q)\n", c.Name()))
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}
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_, err := fmt.Fprintf(w, "\n")
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return err
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buf.WriteString("\n")
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}
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func writeFlagHandler(name string, annotations map[string][]string, w io.Writer) error {
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func writeFlagHandler(buf *bytes.Buffer, name string, annotations map[string][]string) {
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for key, value := range annotations {
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switch key {
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case BashCompFilenameExt:
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_, err := fmt.Fprintf(w, " flags_with_completion+=(%q)\n", name)
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if err != nil {
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return err
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}
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buf.WriteString(fmt.Sprintf(" flags_with_completion+=(%q)\n", name))
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var ext string
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if len(value) > 0 {
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ext := "__handle_filename_extension_flag " + strings.Join(value, "|")
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_, err = fmt.Fprintf(w, " flags_completion+=(%q)\n", ext)
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ext = "__handle_filename_extension_flag " + strings.Join(value, "|")
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} else {
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ext := "_filedir"
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_, err = fmt.Fprintf(w, " flags_completion+=(%q)\n", ext)
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}
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if err != nil {
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return err
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ext = "_filedir"
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}
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buf.WriteString(fmt.Sprintf(" flags_completion+=(%q)\n", ext))
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case BashCompCustom:
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_, err := fmt.Fprintf(w, " flags_with_completion+=(%q)\n", name)
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if err != nil {
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return err
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}
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buf.WriteString(fmt.Sprintf(" flags_with_completion+=(%q)\n", name))
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if len(value) > 0 {
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handlers := strings.Join(value, "; ")
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_, err = fmt.Fprintf(w, " flags_completion+=(%q)\n", handlers)
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buf.WriteString(fmt.Sprintf(" flags_completion+=(%q)\n", handlers))
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} else {
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_, err = fmt.Fprintf(w, " flags_completion+=(:)\n")
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}
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if err != nil {
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return err
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buf.WriteString(" flags_completion+=(:)\n")
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}
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case BashCompSubdirsInDir:
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_, err := fmt.Fprintf(w, " flags_with_completion+=(%q)\n", name)
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buf.WriteString(fmt.Sprintf(" flags_with_completion+=(%q)\n", name))
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var ext string
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if len(value) == 1 {
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ext := "__handle_subdirs_in_dir_flag " + value[0]
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_, err = fmt.Fprintf(w, " flags_completion+=(%q)\n", ext)
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ext = "__handle_subdirs_in_dir_flag " + value[0]
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} else {
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ext := "_filedir -d"
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_, err = fmt.Fprintf(w, " flags_completion+=(%q)\n", ext)
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}
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if err != nil {
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return err
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ext = "_filedir -d"
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}
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buf.WriteString(fmt.Sprintf(" flags_completion+=(%q)\n", ext))
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}
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}
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return nil
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}
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func writeShortFlag(flag *pflag.Flag, w io.Writer) error {
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b := (len(flag.NoOptDefVal) > 0)
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func writeShortFlag(buf *bytes.Buffer, flag *pflag.Flag) {
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name := flag.Shorthand
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format := " "
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if !b {
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if len(flag.NoOptDefVal) == 0 {
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format += "two_word_"
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}
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format += "flags+=(\"-%s\")\n"
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if _, err := fmt.Fprintf(w, format, name); err != nil {
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return err
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}
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return writeFlagHandler("-"+name, flag.Annotations, w)
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buf.WriteString(fmt.Sprintf(format, name))
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writeFlagHandler(buf, "-"+name, flag.Annotations)
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}
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func writeFlag(flag *pflag.Flag, w io.Writer) error {
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b := (len(flag.NoOptDefVal) > 0)
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func writeFlag(buf *bytes.Buffer, flag *pflag.Flag) {
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name := flag.Name
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format := " flags+=(\"--%s"
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if !b {
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if len(flag.NoOptDefVal) == 0 {
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format += "="
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}
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format += "\")\n"
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if _, err := fmt.Fprintf(w, format, name); err != nil {
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return err
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}
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return writeFlagHandler("--"+name, flag.Annotations, w)
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buf.WriteString(fmt.Sprintf(format, name))
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writeFlagHandler(buf, "--"+name, flag.Annotations)
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}
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func writeLocalNonPersistentFlag(flag *pflag.Flag, w io.Writer) error {
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b := (len(flag.NoOptDefVal) > 0)
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func writeLocalNonPersistentFlag(buf *bytes.Buffer, flag *pflag.Flag) {
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name := flag.Name
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format := " local_nonpersistent_flags+=(\"--%s"
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if !b {
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if len(flag.NoOptDefVal) == 0 {
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format += "="
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}
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format += "\")\n"
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_, err := fmt.Fprintf(w, format, name)
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return err
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buf.WriteString(fmt.Sprintf(format, name))
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}
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func writeFlags(cmd *Command, w io.Writer) error {
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_, err := fmt.Fprintf(w, ` flags=()
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func writeFlags(buf *bytes.Buffer, cmd *Command) {
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buf.WriteString(` flags=()
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two_word_flags=()
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local_nonpersistent_flags=()
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flags_with_completion=()
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flags_completion=()
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`)
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if err != nil {
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return err
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}
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localNonPersistentFlags := cmd.LocalNonPersistentFlags()
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var visitErr error
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cmd.NonInheritedFlags().VisitAll(func(flag *pflag.Flag) {
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if nonCompletableFlag(flag) {
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return
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}
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if err := writeFlag(flag, w); err != nil {
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visitErr = err
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return
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}
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writeFlag(buf, flag)
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if len(flag.Shorthand) > 0 {
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if err := writeShortFlag(flag, w); err != nil {
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visitErr = err
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return
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}
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writeShortFlag(buf, flag)
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}
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if localNonPersistentFlags.Lookup(flag.Name) != nil {
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if err := writeLocalNonPersistentFlag(flag, w); err != nil {
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visitErr = err
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return
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}
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writeLocalNonPersistentFlag(buf, flag)
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}
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})
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if visitErr != nil {
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return visitErr
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}
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cmd.InheritedFlags().VisitAll(func(flag *pflag.Flag) {
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if nonCompletableFlag(flag) {
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return
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}
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if err := writeFlag(flag, w); err != nil {
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visitErr = err
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return
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}
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writeFlag(buf, flag)
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if len(flag.Shorthand) > 0 {
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if err := writeShortFlag(flag, w); err != nil {
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visitErr = err
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return
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}
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writeShortFlag(buf, flag)
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}
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})
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if visitErr != nil {
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return visitErr
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}
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_, err = fmt.Fprintf(w, "\n")
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return err
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buf.WriteString("\n")
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}
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func writeRequiredFlag(cmd *Command, w io.Writer) error {
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if _, err := fmt.Fprintf(w, " must_have_one_flag=()\n"); err != nil {
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return err
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}
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func writeRequiredFlag(buf *bytes.Buffer, cmd *Command) {
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buf.WriteString(" must_have_one_flag=()\n")
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flags := cmd.NonInheritedFlags()
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var visitErr error
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flags.VisitAll(func(flag *pflag.Flag) {
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if nonCompletableFlag(flag) {
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return
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@ -481,107 +409,68 @@ func writeRequiredFlag(cmd *Command, w io.Writer) error {
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switch key {
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case BashCompOneRequiredFlag:
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format := " must_have_one_flag+=(\"--%s"
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b := (flag.Value.Type() == "bool")
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if !b {
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if flag.Value.Type() != "bool" {
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format += "="
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}
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format += "\")\n"
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if _, err := fmt.Fprintf(w, format, flag.Name); err != nil {
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visitErr = err
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return
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}
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buf.WriteString(fmt.Sprintf(format, flag.Name))
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if len(flag.Shorthand) > 0 {
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if _, err := fmt.Fprintf(w, " must_have_one_flag+=(\"-%s\")\n", flag.Shorthand); err != nil {
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visitErr = err
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return
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}
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buf.WriteString(fmt.Sprintf(" must_have_one_flag+=(\"-%s\")\n", flag.Shorthand))
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}
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}
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}
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})
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return visitErr
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}
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func writeRequiredNouns(cmd *Command, w io.Writer) error {
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if _, err := fmt.Fprintf(w, " must_have_one_noun=()\n"); err != nil {
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return err
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}
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func writeRequiredNouns(buf *bytes.Buffer, cmd *Command) {
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buf.WriteString(" must_have_one_noun=()\n")
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sort.Sort(sort.StringSlice(cmd.ValidArgs))
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for _, value := range cmd.ValidArgs {
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if _, err := fmt.Fprintf(w, " must_have_one_noun+=(%q)\n", value); err != nil {
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return err
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}
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buf.WriteString(fmt.Sprintf(" must_have_one_noun+=(%q)\n", value))
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}
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return nil
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}
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func writeArgAliases(cmd *Command, w io.Writer) error {
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if _, err := fmt.Fprintf(w, " noun_aliases=()\n"); err != nil {
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return err
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}
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func writeArgAliases(buf *bytes.Buffer, cmd *Command) {
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buf.WriteString(" noun_aliases=()\n")
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sort.Sort(sort.StringSlice(cmd.ArgAliases))
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for _, value := range cmd.ArgAliases {
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if _, err := fmt.Fprintf(w, " noun_aliases+=(%q)\n", value); err != nil {
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return err
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}
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buf.WriteString(fmt.Sprintf(" noun_aliases+=(%q)\n", value))
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}
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return nil
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}
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func gen(cmd *Command, w io.Writer) error {
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func gen(buf *bytes.Buffer, cmd *Command) {
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for _, c := range cmd.Commands() {
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if !c.IsAvailableCommand() || c == cmd.helpCommand {
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continue
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}
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if err := gen(c, w); err != nil {
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return err
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}
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gen(buf, c)
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}
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commandName := cmd.CommandPath()
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commandName = strings.Replace(commandName, " ", "_", -1)
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commandName = strings.Replace(commandName, ":", "__", -1)
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if _, err := fmt.Fprintf(w, "_%s()\n{\n", commandName); err != nil {
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return err
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}
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if _, err := fmt.Fprintf(w, " last_command=%q\n", commandName); err != nil {
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return err
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}
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if err := writeCommands(cmd, w); err != nil {
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return err
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}
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if err := writeFlags(cmd, w); err != nil {
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return err
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}
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if err := writeRequiredFlag(cmd, w); err != nil {
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return err
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}
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if err := writeRequiredNouns(cmd, w); err != nil {
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return err
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}
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if err := writeArgAliases(cmd, w); err != nil {
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return err
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}
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if _, err := fmt.Fprintf(w, "}\n\n"); err != nil {
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return err
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}
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return nil
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buf.WriteString(fmt.Sprintf("_%s()\n{\n", commandName))
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buf.WriteString(fmt.Sprintf(" last_command=%q\n", commandName))
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writeCommands(buf, cmd)
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writeFlags(buf, cmd)
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writeRequiredFlag(buf, cmd)
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writeRequiredNouns(buf, cmd)
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writeArgAliases(buf, cmd)
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buf.WriteString("}\n\n")
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}
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// GenBashCompletion generates bash completion file and writes to the passed writer.
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func (cmd *Command) GenBashCompletion(w io.Writer) error {
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if err := preamble(w, cmd.Name()); err != nil {
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return err
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}
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buf := new(bytes.Buffer)
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writePreamble(buf, cmd.Name())
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if len(cmd.BashCompletionFunction) > 0 {
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if _, err := fmt.Fprintf(w, "%s\n", cmd.BashCompletionFunction); err != nil {
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return err
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}
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buf.WriteString(cmd.BashCompletionFunction + "\n")
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}
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if err := gen(cmd, w); err != nil {
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return err
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}
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return postscript(w, cmd.Name())
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gen(buf, cmd)
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writePostscript(buf, cmd.Name())
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_, err := buf.WriteTo(w)
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return err
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}
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func nonCompletableFlag(flag *pflag.Flag) bool {
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@ -2,16 +2,12 @@ package cobra
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import (
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"bytes"
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"fmt"
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"os"
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"os/exec"
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"strings"
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"testing"
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)
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var _ = fmt.Println
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var _ = os.Stderr
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func checkOmit(t *testing.T, found, unexpected string) {
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if strings.Contains(found, unexpected) {
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t.Errorf("Unexpected response.\nGot: %q\nBut should not have!\n", unexpected)
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