// ShortHelp returns a formatted CLI helptext string, generated for the given command
func ShortHelp(rootName string, root *cmds.Command, path []string, out io.Writer) error {
cmd, err := root.Get(path)
if err != nil {
return err
}
// default cmd to root if there is no path
if path == nil && cmd == nil {
cmd = root
}
pathStr := rootName
if len(path) > 0 {
pathStr += " " + strings.Join(path, " ")
}
fields := helpFields{
Indent: indentStr,
Path: pathStr,
ArgUsage: usageText(cmd),
Tagline: cmd.Helptext.Tagline,
Synopsis: cmd.Helptext.Synopsis,
Description: cmd.Helptext.ShortDescription,
Usage: cmd.Helptext.Usage,
MoreHelp: (cmd != root),
}
// trim the extra newlines (see TrimNewlines doc)
fields.TrimNewlines()
// indent all fields that have been set
fields.IndentAll()
return shortHelpTemplate.Execute(out, fields)
}
// Parse parses the input commandline string (cmd, flags, and args).
// returns the corresponding command Request object.
func Parse(input []string, stdin *os.File, root *cmds.Command) (cmds.Request, *cmds.Command, []string, error) {
path, input, cmd := parsePath(input, root)
if len(path) == 0 {
return nil, nil, path, ErrInvalidSubcmd
}
opts, stringVals, err := parseOptions(input)
if err != nil {
return nil, cmd, path, err
}
optDefs, err := root.GetOptions(path)
if err != nil {
return nil, cmd, path, err
}
// check to make sure there aren't any undefined options
for k := range opts {
if _, found := optDefs[k]; !found {
err = fmt.Errorf("Unrecognized option: -%s", k)
return nil, cmd, path, err
}
}
req, err := cmds.NewRequest(path, opts, nil, nil, cmd, optDefs)
if err != nil {
return nil, cmd, path, err
}
// if -r is provided, and it is associated with the package builtin
// recursive path option, allow recursive file paths
recursiveOpt := req.Option(cmds.RecShort)
recursive := false
if recursiveOpt != nil && recursiveOpt.Definition() == cmds.OptionRecursivePath {
recursive, _, err = recursiveOpt.Bool()
if err != nil {
return req, nil, nil, u.ErrCast()
}
}
stringArgs, fileArgs, err := parseArgs(stringVals, stdin, cmd.Arguments, recursive)
if err != nil {
return req, cmd, path, err
}
req.SetArguments(stringArgs)
file := &cmds.SliceFile{"", fileArgs}
req.SetFiles(file)
err = cmd.CheckArguments(req)
if err != nil {
return req, cmd, path, err
}
return req, cmd, path, nil
}
// LongHelp returns a formatted CLI helptext string, generated for the given command
func LongHelp(rootName string, root *cmds.Command, path []string, out io.Writer) error {
cmd, err := root.Get(path)
if err != nil {
return err
}
pathStr := rootName
if len(path) > 0 {
pathStr += " " + strings.Join(path, " ")
}
fields := helpFields{
Indent: indentStr,
Path: pathStr,
ArgUsage: usageText(cmd),
Tagline: cmd.Helptext.Tagline,
Arguments: cmd.Helptext.Arguments,
Options: cmd.Helptext.Options,
Synopsis: cmd.Helptext.Synopsis,
Subcommands: cmd.Helptext.Subcommands,
Description: cmd.Helptext.ShortDescription,
Usage: cmd.Helptext.Usage,
MoreHelp: (cmd != root),
}
if len(cmd.Helptext.LongDescription) > 0 {
fields.Description = cmd.Helptext.LongDescription
}
// autogen fields that are empty
if len(fields.Arguments) == 0 {
fields.Arguments = strings.Join(argumentText(cmd), "\n")
}
if len(fields.Options) == 0 {
fields.Options = strings.Join(optionText(cmd), "\n")
}
if len(fields.Subcommands) == 0 {
fields.Subcommands = strings.Join(subcommandText(cmd, rootName, path), "\n")
}
// trim the extra newlines (see TrimNewlines doc)
fields.TrimNewlines()
// indent all fields that have been set
fields.IndentAll()
return longHelpTemplate.Execute(out, fields)
}
// Parse parses the data in a http.Request and returns a command Request object
func Parse(r *http.Request, root *cmds.Command) (cmds.Request, error) {
if !strings.HasPrefix(r.URL.Path, ApiPath) {
return nil, errors.New("Unexpected path prefix")
}
path := strings.Split(strings.TrimPrefix(r.URL.Path, ApiPath+"/"), "/")
stringArgs := make([]string, 0)
cmd, err := root.Get(path[:len(path)-1])
if err != nil {
// 404 if there is no command at that path
return nil, ErrNotFound
} else if sub := cmd.Subcommand(path[len(path)-1]); sub == nil {
if len(path) <= 1 {
return nil, ErrNotFound
}
// if the last string in the path isn't a subcommand, use it as an argument
// e.g. /objects/Qabc12345 (we are passing "Qabc12345" to the "objects" command)
stringArgs = append(stringArgs, path[len(path)-1])
path = path[:len(path)-1]
} else {
cmd = sub
}
opts, stringArgs2 := parseOptions(r)
stringArgs = append(stringArgs, stringArgs2...)
// count required argument definitions
numRequired := 0
for _, argDef := range cmd.Arguments {
if argDef.Required {
numRequired++
}
}
// count the number of provided argument values
valCount := len(stringArgs)
args := make([]string, valCount)
valIndex := 0
requiredFile := ""
for _, argDef := range cmd.Arguments {
// skip optional argument definitions if there aren't sufficient remaining values
if valCount-valIndex <= numRequired && !argDef.Required {
continue
} else if argDef.Required {
numRequired--
}
if argDef.Type == cmds.ArgString {
if argDef.Variadic {
for _, s := range stringArgs {
args[valIndex] = s
valIndex++
}
valCount -= len(stringArgs)
} else if len(stringArgs) > 0 {
args[valIndex] = stringArgs[0]
stringArgs = stringArgs[1:]
valIndex++
} else {
break
}
} else if argDef.Type == cmds.ArgFile && argDef.Required && len(requiredFile) == 0 {
requiredFile = argDef.Name
}
}
optDefs, err := root.GetOptions(path)
if err != nil {
return nil, err
}
// create cmds.File from multipart/form-data contents
contentType := r.Header.Get(contentTypeHeader)
mediatype, _, _ := mime.ParseMediaType(contentType)
var f *cmds.MultipartFile
if mediatype == "multipart/form-data" {
f = &cmds.MultipartFile{Mediatype: mediatype}
f.Reader, err = r.MultipartReader()
if err != nil {
return nil, err
}
}
// if there is a required filearg, error if no files were provided
if len(requiredFile) > 0 && f == nil {
return nil, fmt.Errorf("File argument '%s' is required", requiredFile)
}
req, err := cmds.NewRequest(path, opts, args, f, cmd, optDefs)
if err != nil {
return nil, err
}
err = cmd.CheckArguments(req)
if err != nil {
return nil, err
}
return req, nil
}