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cmd/utils: customize cli.HelpPrinter to fix alignment (#19956)
This copies cli.printHelp but changes minwidth to 38. Custom flag code is improved to print the default value using cli.FlagStringer like all built-in flags do.
This commit is contained in:
SjonHortensius
Felix Lange
parent
1eaf66ae60
commit
4d358b9fc0
@ -20,7 +20,6 @@ import (
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"encoding"
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"errors"
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"flag"
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"fmt"
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"math/big"
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"os"
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"os/user"
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@ -34,33 +33,44 @@ import (
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// Custom type which is registered in the flags library which cli uses for
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// argument parsing. This allows us to expand Value to an absolute path when
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// the argument is parsed
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type DirectoryString struct {
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Value string
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type DirectoryString string
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func (s *DirectoryString) String() string {
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return string(*s)
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}
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func (self *DirectoryString) String() string {
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return self.Value
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}
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func (self *DirectoryString) Set(value string) error {
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self.Value = expandPath(value)
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func (s *DirectoryString) Set(value string) error {
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*s = DirectoryString(expandPath(value))
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return nil
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}
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// Custom cli.Flag type which expand the received string to an absolute path.
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// e.g. ~/.ethereum -> /home/username/.ethereum
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type DirectoryFlag struct {
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Name string
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Value DirectoryString
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Usage string
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Name string
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Value DirectoryString
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Usage string
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EnvVar string
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}
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func (self DirectoryFlag) String() string {
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fmtString := "%s %v\t%v"
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if len(self.Value.Value) > 0 {
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fmtString = "%s \"%v\"\t%v"
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}
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return fmt.Sprintf(fmtString, prefixedNames(self.Name), self.Value.Value, self.Usage)
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func (f DirectoryFlag) String() string {
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return cli.FlagStringer(f)
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}
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// called by cli library, grabs variable from environment (if in env)
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// and adds variable to flag set for parsing.
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func (f DirectoryFlag) Apply(set *flag.FlagSet) {
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eachName(f.Name, func(name string) {
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set.Var(&f.Value, f.Name, f.Usage)
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})
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}
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func (f DirectoryFlag) GetName() string {
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return f.Name
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}
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func (f *DirectoryFlag) Set(value string) {
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f.Value.Set(value)
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}
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func eachName(longName string, fn func(string)) {
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@ -71,14 +81,6 @@ func eachName(longName string, fn func(string)) {
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}
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}
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// called by cli library, grabs variable from environment (if in env)
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// and adds variable to flag set for parsing.
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func (self DirectoryFlag) Apply(set *flag.FlagSet) {
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eachName(self.Name, func(name string) {
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set.Var(&self.Value, self.Name, self.Usage)
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})
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}
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type TextMarshaler interface {
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encoding.TextMarshaler
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encoding.TextUnmarshaler
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@ -103,9 +105,10 @@ func (v textMarshalerVal) Set(s string) error {
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// TextMarshalerFlag wraps a TextMarshaler value.
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type TextMarshalerFlag struct {
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Name string
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Value TextMarshaler
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Usage string
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Name string
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Value TextMarshaler
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Usage string
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EnvVar string
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}
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func (f TextMarshalerFlag) GetName() string {
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@ -113,7 +116,7 @@ func (f TextMarshalerFlag) GetName() string {
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}
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func (f TextMarshalerFlag) String() string {
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return fmt.Sprintf("%s \"%v\"\t%v", prefixedNames(f.Name), f.Value, f.Usage)
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return cli.FlagStringer(f)
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}
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func (f TextMarshalerFlag) Apply(set *flag.FlagSet) {
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@ -134,9 +137,10 @@ func GlobalTextMarshaler(ctx *cli.Context, name string) TextMarshaler {
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// BigFlag is a command line flag that accepts 256 bit big integers in decimal or
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// hexadecimal syntax.
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type BigFlag struct {
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Name string
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Value *big.Int
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Usage string
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Name string
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Value *big.Int
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Usage string
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EnvVar string
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}
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// bigValue turns *big.Int into a flag.Value
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@ -163,11 +167,7 @@ func (f BigFlag) GetName() string {
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}
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func (f BigFlag) String() string {
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fmtString := "%s %v\t%v"
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if f.Value != nil {
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fmtString = "%s \"%v\"\t%v"
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}
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return fmt.Sprintf(fmtString, prefixedNames(f.Name), f.Value, f.Usage)
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return cli.FlagStringer(f)
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}
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func (f BigFlag) Apply(set *flag.FlagSet) {
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@ -207,14 +207,6 @@ func prefixedNames(fullName string) (prefixed string) {
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return
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}
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func (self DirectoryFlag) GetName() string {
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return self.Name
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}
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func (self *DirectoryFlag) Set(value string) {
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self.Value.Value = value
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}
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// Expands a file path
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// 1. replace tilde with users home dir
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// 2. expands embedded environment variables
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@ -21,12 +21,15 @@ import (
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"crypto/ecdsa"
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"errors"
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"fmt"
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"io"
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"io/ioutil"
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"math/big"
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"os"
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"path/filepath"
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"strconv"
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"strings"
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"text/tabwriter"
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"text/template"
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"time"
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"github.com/ethereum/go-ethereum/accounts"
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@ -90,8 +93,8 @@ GLOBAL OPTIONS:
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{{range .Flags}}{{.}}
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{{end}}{{end}}
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`
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cli.CommandHelpTemplate = CommandHelpTemplate
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cli.HelpPrinter = printHelp
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}
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// NewApp creates an app with sane defaults.
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@ -105,6 +108,17 @@ func NewApp(gitCommit, gitDate, usage string) *cli.App {
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return app
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}
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func printHelp(out io.Writer, templ string, data interface{}) {
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funcMap := template.FuncMap{"join": strings.Join}
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t := template.Must(template.New("help").Funcs(funcMap).Parse(templ))
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w := tabwriter.NewWriter(out, 38, 8, 2, ' ', 0)
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err := t.Execute(w, data)
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if err != nil {
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panic(err)
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}
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w.Flush()
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}
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// These are all the command line flags we support.
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// If you add to this list, please remember to include the
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// flag in the appropriate command definition.
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@ -117,7 +131,7 @@ var (
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DataDirFlag = DirectoryFlag{
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Name: "datadir",
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Usage: "Data directory for the databases and keystore",
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Value: DirectoryString{node.DefaultDataDir()},
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Value: DirectoryString(node.DefaultDataDir()),
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}
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AncientFlag = DirectoryFlag{
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Name: "datadir.ancient",
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@ -168,7 +182,7 @@ var (
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DocRootFlag = DirectoryFlag{
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Name: "docroot",
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Usage: "Document Root for HTTPClient file scheme",
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Value: DirectoryString{homeDir()},
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Value: DirectoryString(homeDir()),
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}
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ExitWhenSyncedFlag = cli.BoolFlag{
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Name: "exitwhensynced",
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@ -291,8 +305,8 @@ var (
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}
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EthashDatasetDirFlag = DirectoryFlag{
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Name: "ethash.dagdir",
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Usage: "Directory to store the ethash mining DAGs (default = inside home folder)",
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Value: DirectoryString{eth.DefaultConfig.Ethash.DatasetDir},
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Usage: "Directory to store the ethash mining DAGs",
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Value: DirectoryString(eth.DefaultConfig.Ethash.DatasetDir),
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}
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EthashDatasetsInMemoryFlag = cli.IntFlag{
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Name: "ethash.dagsinmem",
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