73 lines
1.5 KiB
Go
73 lines
1.5 KiB
Go
// Package complete provides a tool for bash writing bash completion in go.
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//
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// Writing bash completion scripts is a hard work. This package provides an easy way
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// to create bash completion scripts for any command, and also an easy way to install/uninstall
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// the completion of the command.
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package complete
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import (
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"fmt"
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"os"
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"strings"
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"github.com/posener/complete/cmd"
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)
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const (
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envComplete = "COMP_LINE"
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envDebug = "COMP_DEBUG"
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)
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// Run get a command, get the typed arguments from environment
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// variable, and print out the complete options
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func Run(c Command) {
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args, ok := getLine()
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if !ok {
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cmd.Run(c.Name)
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return
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}
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Log("Completing args: %s", args)
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options := complete(c, args)
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Log("Completion: %s", options)
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output(options)
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}
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// complete get a command an command line arguments and returns
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// matching completion options
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func complete(c Command, args []string) (matching []string) {
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options, _ := c.options(args[:len(args)-1])
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// choose only matching options
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l := last(args)
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for _, option := range options {
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if option.Match(l) {
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matching = append(matching, option.String())
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}
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}
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return
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}
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func getLine() ([]string, bool) {
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line := os.Getenv(envComplete)
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if line == "" {
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return nil, false
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}
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return strings.Split(line, " "), true
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}
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func last(args []string) (last string) {
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if len(args) > 0 {
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last = args[len(args)-1]
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}
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return
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}
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func output(options []string) {
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// stdout of program defines the complete options
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for _, option := range options {
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fmt.Println(option)
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}
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}
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