153 lines
2.5 KiB
Go
153 lines
2.5 KiB
Go
package mtool
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// The package implements fast way
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// to make multitool CLI applications.
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import (
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"flag"
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"os"
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"time"
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)
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type Flags struct {
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*flag.FlagSet
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tool *Tool
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args []string
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parsedArgs []string
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envNameMap map[string] []string
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envMap map[string]string
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}
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type ToolMap map[string] *Tool
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func (flags *Flags) wasPassed(name string) bool {
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found := false
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flags.Visit(func(f *flag.Flag){
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if f.Name == name {
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found = true
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}
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})
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return found
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}
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func (flags *Flags) setEnv(
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name string,
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env []string,
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) bool {
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flags.envNameMap[name] = env
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for _, k := range env {
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value, has := os.LookupEnv(k)
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if !has {
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continue
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}
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flags.envMap[name] = value
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return true
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}
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return false
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}
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// Set new string variable
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// to parse.
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func (flags *Flags) StringVar(
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p *string,
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name string,
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value string,
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usage string,
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env ...string,
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) {
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flags.FlagSet.StringVar(p, name, value, usage)
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flags.setEnv(name, env)
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}
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// Set new int variable to parse.
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func (flags *Flags) IntVar(
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p *int,
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name string,
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value int,
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usage string,
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env ...string,
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) {
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flags.FlagSet.IntVar(p, name, value, usage)
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flags.setEnv(name, env)
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}
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// Set new int64 variable to parse.
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func (flags *Flags) Int64Var(
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p *int64,
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name string,
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value int64,
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usage string,
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env ...string,
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) {
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flags.FlagSet.Int64Var(p, name, value, usage)
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flags.setEnv(name, env)
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}
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// Set new bool variable to parse.
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func (flags *Flags) BoolVar(
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p *bool,
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name string,
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value bool,
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usage string,
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env ...string,
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) {
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flags.FlagSet.BoolVar(p, name, value, usage)
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flags.setEnv(name, env)
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}
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// Set new float64 variable to parse.
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func (flags *Flags) Float64Var(
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p *float64,
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name string,
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value float64,
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usage string,
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env ...string,
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) {
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flags.FlagSet.Float64Var(p, name, value, usage)
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flags.setEnv(name, env)
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}
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// Set new duration variable to parse.
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func (flags *Flags) DurationVar(
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p *time.Duration,
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name string,
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value time.Duration,
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usage string,
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env ...string,
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) {
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flags.FlagSet.DurationVar(p, name, value, usage)
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flags.setEnv(name, env)
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}
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func (flags *Flags) Parse() []string {
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flags.FlagSet.Parse(flags.args)
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for name, v := range flags.envMap {
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if !flags.wasPassed(name) {
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flags.FlagSet.Set(name, v)
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}
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}
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flags.parsedArgs = flags.FlagSet.Args()
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return flags.parsedArgs
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}
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// Get all the arguments, including the
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// parsed ones.
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func (flags *Flags) AllArgs() []string {
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return flags.args
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}
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// Get all the arguments going after options.
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func (flags *Flags) Args() []string {
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return flags.parsedArgs
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}
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// Get the tool currently called.
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func (flags *Flags) Tool() *Tool {
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return flags.tool
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}
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