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cmd/geth, internal/flags, go.mod: colorize cli help, support env vars (#28103)

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* cmd/geth, internal/flags, go.mod: colorize cli help, support env vars

* internal/flags: use stdout, not stderr for terminal detection
This commit is contained in:
Péter Szilágyi 2023-09-14 10:33:59 +03:00 committed by GitHub
parent b9b99a12e5
commit d9fbb71d63
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GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 76 additions and 15 deletions
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1
cmd/geth/main.go
View File

@ -244,6 +244,7 @@ func init() {
debug.Flags,
metricsFlags,
)
flags.AutoEnvVars(app.Flags, "GETH")
app.Before = func(ctx *cli.Context) error {
maxprocs.Set() // Automatically set GOMAXPROCS to match Linux container CPU quota.

2
go.mod
View File

@ -61,7 +61,7 @@ require (
github.com/supranational/blst v0.3.11
github.com/syndtr/goleveldb v1.0.1-0.20210819022825-2ae1ddf74ef7
github.com/tyler-smith/go-bip39 v1.1.0
github.com/urfave/cli/v2 v2.24.1
github.com/urfave/cli/v2 v2.25.7
go.uber.org/automaxprocs v1.5.2
golang.org/x/crypto v0.12.0
golang.org/x/exp v0.0.0-20230810033253-352e893a4cad

6
go.sum
View File

@ -39,7 +39,7 @@ github.com/Azure/azure-sdk-for-go/sdk/internal v0.8.3/go.mod h1:KLF4gFr6DcKFZwSu
github.com/Azure/azure-sdk-for-go/sdk/storage/azblob v0.3.0 h1:Px2UA+2RvSSvv+RvJNuUB6n7rs5Wsel4dXLe90Um2n4=
github.com/Azure/azure-sdk-for-go/sdk/storage/azblob v0.3.0/go.mod h1:tPaiy8S5bQ+S5sOiDlINkp7+Ef339+Nz5L5XO+cnOHo=
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
github.com/BurntSushi/toml v1.2.1 h1:9F2/+DoOYIOksmaJFPw1tGFy1eDnIJXg+UHjuD8lTak=
github.com/BurntSushi/toml v1.3.2 h1:o7IhLm0Msx3BaB+n3Ag7L8EVlByGnpq14C4YWiu/gL8=
github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
github.com/CloudyKit/fastprinter v0.0.0-20170127035650-74b38d55f37a/go.mod h1:EFZQ978U7x8IRnstaskI3IysnWY5Ao3QgZUKOXlsAdw=
github.com/CloudyKit/jet v2.1.3-0.20180809161101-62edd43e4f88+incompatible/go.mod h1:HPYO+50pSWkPoj9Q/eq0aRGByCL6ScRlUmiEX5Zgm+w=
@ -551,8 +551,8 @@ github.com/tyler-smith/go-bip39 v1.1.0/go.mod h1:gUYDtqQw1JS3ZJ8UWVcGTGqqr6YIN3C
github.com/ugorji/go v1.1.4/go.mod h1:uQMGLiO92mf5W77hV/PUCpI3pbzQx3CRekS0kk+RGrc=
github.com/ugorji/go/codec v0.0.0-20181204163529-d75b2dcb6bc8/go.mod h1:VFNgLljTbGfSG7qAOspJ7OScBnGdDN/yBr0sguwnwf0=
github.com/urfave/cli/v2 v2.3.0/go.mod h1:LJmUH05zAU44vOAcrfzZQKsZbVcdbOG8rtL3/XcUArI=
github.com/urfave/cli/v2 v2.24.1 h1:/QYYr7g0EhwXEML8jO+8OYt5trPnLHS0p3mrgExJ5NU=
github.com/urfave/cli/v2 v2.24.1/go.mod h1:GHupkWPMM0M/sj1a2b4wUrWBPzazNrIjouW6fmdJLxc=
github.com/urfave/cli/v2 v2.25.7 h1:VAzn5oq403l5pHjc4OhD54+XGO9cdKVL/7lDjF+iKUs=
github.com/urfave/cli/v2 v2.25.7/go.mod h1:8qnjx1vcq5s2/wpsqoZFndg2CE5tNFyrTvS6SinrnYQ=
github.com/urfave/negroni v1.0.0/go.mod h1:Meg73S6kFm/4PpbYdq35yYWoCZ9mS/YSx+lKnmiohz4=
github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
github.com/valyala/fasthttp v1.6.0/go.mod h1:FstJa9V+Pj9vQ7OJie2qMHdwemEDaDiSdBnvPM1Su9w=

9
internal/flags/flags.go
View File

@ -68,6 +68,7 @@ type DirectoryFlag struct {
Value DirectoryString
Aliases []string
EnvVars []string
}
// For cli.Flag:
@ -102,7 +103,7 @@ func (f *DirectoryFlag) GetCategory() string { return f.Category }
func (f *DirectoryFlag) TakesValue() bool { return true }
func (f *DirectoryFlag) GetUsage() string { return f.Usage }
func (f *DirectoryFlag) GetValue() string { return f.Value.String() }
func (f *DirectoryFlag) GetEnvVars() []string { return nil } // env not supported
func (f *DirectoryFlag) GetEnvVars() []string { return f.EnvVars }
func (f *DirectoryFlag) GetDefaultText() string {
if f.DefaultText != "" {
@ -156,6 +157,7 @@ type TextMarshalerFlag struct {
Value TextMarshaler
Aliases []string
EnvVars []string
}
// For cli.Flag:
@ -187,7 +189,7 @@ func (f *TextMarshalerFlag) GetCategory() string { return f.Category }
func (f *TextMarshalerFlag) TakesValue() bool { return true }
func (f *TextMarshalerFlag) GetUsage() string { return f.Usage }
func (f *TextMarshalerFlag) GetEnvVars() []string { return nil } // env not supported
func (f *TextMarshalerFlag) GetEnvVars() []string { return f.EnvVars }
func (f *TextMarshalerFlag) GetValue() string {
t, err := f.Value.MarshalText()
@ -237,6 +239,7 @@ type BigFlag struct {
Value *big.Int
Aliases []string
EnvVars []string
}
// For cli.Flag:
@ -271,7 +274,7 @@ func (f *BigFlag) GetCategory() string { return f.Category }
func (f *BigFlag) TakesValue() bool { return true }
func (f *BigFlag) GetUsage() string { return f.Usage }
func (f *BigFlag) GetValue() string { return f.Value.String() }
func (f *BigFlag) GetEnvVars() []string { return nil } // env not supported
func (f *BigFlag) GetEnvVars() []string { return f.EnvVars }
func (f *BigFlag) GetDefaultText() string {
if f.DefaultText != "" {

73
internal/flags/helpers.go
View File

@ -18,13 +18,20 @@ package flags
import (
"fmt"
"os"
"regexp"
"strings"
"github.com/ethereum/go-ethereum/internal/version"
"github.com/ethereum/go-ethereum/params"
"github.com/mattn/go-isatty"
"github.com/urfave/cli/v2"
)
// usecolor defines whether the CLI help should use colored output or normal dumb
// colorless terminal formatting.
var usecolor = (isatty.IsTerminal(os.Stdout.Fd()) || isatty.IsCygwinTerminal(os.Stdout.Fd())) && os.Getenv("TERM") != "dumb"
// NewApp creates an app with sane defaults.
func NewApp(usage string) *cli.App {
git, _ := version.VCS()
@ -129,6 +136,14 @@ func doMigrateFlags(ctx *cli.Context) {
}
func init() {
if usecolor {
// Annotate all help categories with colors
cli.AppHelpTemplate = regexp.MustCompile("[A-Z ]+:").ReplaceAllString(cli.AppHelpTemplate, "\u001B[33m$0\u001B[0m")
// Annotate flag categories with colors (private template, so need to
// copy-paste the entire thing here...)
cli.AppHelpTemplate = strings.ReplaceAll(cli.AppHelpTemplate, "{{template \"visibleFlagCategoryTemplate\" .}}", "{{range .VisibleFlagCategories}}\n {{if .Name}}\u001B[33m{{.Name}}\u001B[0m\n\n {{end}}{{$flglen := len .Flags}}{{range $i, $e := .Flags}}{{if eq (subtract $flglen $i) 1}}{{$e}}\n{{else}}{{$e}}\n {{end}}{{end}}{{end}}")
}
cli.FlagStringer = FlagString
}
@ -138,30 +153,31 @@ func FlagString(f cli.Flag) string {
if !ok {
return ""
}
needsPlaceholder := df.TakesValue()
placeholder := ""
if needsPlaceholder {
placeholder = "value"
}
namesText := pad(cli.FlagNamePrefixer(df.Names(), placeholder), 30)
namesText := cli.FlagNamePrefixer(df.Names(), placeholder)
defaultValueString := ""
if s := df.GetDefaultText(); s != "" {
defaultValueString = " (default: " + s + ")"
}
usage := strings.TrimSpace(df.GetUsage())
envHint := strings.TrimSpace(cli.FlagEnvHinter(df.GetEnvVars(), ""))
if len(envHint) > 0 {
usage += " " + envHint
if envHint != "" {
envHint = " (" + envHint[1:len(envHint)-1] + ")"
}
usage := strings.TrimSpace(df.GetUsage())
usage = wordWrap(usage, 80)
usage = indent(usage, 10)
return fmt.Sprintf("\n %s%s\n%s", namesText, defaultValueString, usage)
if usecolor {
return fmt.Sprintf("\n \u001B[32m%-35s%-35s\u001B[0m%s\n%s", namesText, defaultValueString, envHint, usage)
} else {
return fmt.Sprintf("\n %-35s%-35s%s\n%s", namesText, defaultValueString, envHint, usage)
}
}
func pad(s string, length int) string {
@ -213,3 +229,44 @@ func wordWrap(s string, width int) string {
return output.String()
}
// AutoEnvVars extens all the specific CLI flags with automatically generated
// env vars by capitalizing the flag, replacing . with _ and prefixing it with
// the specified string.
//
// Note, the prefix should *not* contain the separator underscore, that will be
// added automatically.
func AutoEnvVars(flags []cli.Flag, prefix string) {
for _, flag := range flags {
envvar := strings.ToUpper(prefix + "_" + strings.ReplaceAll(strings.ReplaceAll(flag.Names()[0], ".", "_"), "-", "_"))
switch flag := flag.(type) {
case *cli.StringFlag:
flag.EnvVars = append(flag.EnvVars, envvar)
case *cli.BoolFlag:
flag.EnvVars = append(flag.EnvVars, envvar)
case *cli.IntFlag:
flag.EnvVars = append(flag.EnvVars, envvar)
case *cli.Uint64Flag:
flag.EnvVars = append(flag.EnvVars, envvar)
case *cli.DurationFlag:
flag.EnvVars = append(flag.EnvVars, envvar)
case *cli.PathFlag:
flag.EnvVars = append(flag.EnvVars, envvar)
case *BigFlag:
flag.EnvVars = append(flag.EnvVars, envvar)
case *TextMarshalerFlag:
flag.EnvVars = append(flag.EnvVars, envvar)
case *DirectoryFlag:
flag.EnvVars = append(flag.EnvVars, envvar)
}
}
}