From d9fbb71d631d1ad0fb1846042e4c50ab893a6fbf Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?P=C3=A9ter=20Szil=C3=A1gyi?= Date: Thu, 14 Sep 2023 10:33:59 +0300 Subject: [PATCH] cmd/geth, internal/flags, go.mod: colorize cli help, support env vars (#28103) * cmd/geth, internal/flags, go.mod: colorize cli help, support env vars * internal/flags: use stdout, not stderr for terminal detection --- cmd/geth/main.go | 1 + go.mod | 2 +- go.sum | 6 ++-- internal/flags/flags.go | 9 +++-- internal/flags/helpers.go | 73 ++++++++++++++++++++++++++++++++++----- 5 files changed, 76 insertions(+), 15 deletions(-) diff --git a/cmd/geth/main.go b/cmd/geth/main.go index 09730a771..a1d148d80 100644 --- a/cmd/geth/main.go +++ b/cmd/geth/main.go @@ -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. diff --git a/go.mod b/go.mod index cf242e9d2..8061220aa 100644 --- a/go.mod +++ b/go.mod @@ -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 diff --git a/go.sum b/go.sum index 4cb3a1bb8..9c6fd74e4 100644 --- a/go.sum +++ b/go.sum @@ -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= diff --git a/internal/flags/flags.go b/internal/flags/flags.go index b0756b4e0..1e98a2b81 100644 --- a/internal/flags/flags.go +++ b/internal/flags/flags.go @@ -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 != "" { diff --git a/internal/flags/helpers.go b/internal/flags/helpers.go index f210e729d..bd5049828 100644 --- a/internal/flags/helpers.go +++ b/internal/flags/helpers.go @@ -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) + } + } +}