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Use golang flag package [skip ci]

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This commit is contained in:
Elara 2020-11-30 14:25:31 -08:00
parent 34208e4399
commit e4dcb180be
1 changed files with 30 additions and 10 deletions
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40
main.go
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@ -19,6 +19,7 @@
package main
import (
"flag"
"fmt"
"io/ioutil"
"log"
@ -37,21 +38,39 @@ func main() {
currentUser, err := user.Current()
if err != nil { log.Fatal(err) }
// Create help flags
var helpFlagGiven bool
flag.BoolVar(&helpFlagGiven, "help", false, "Show help screen")
flag.BoolVar(&helpFlagGiven, "h", false, "Show help screen (shorthand)")
// Check to make sure root is not being used unless -r/--root specified
if !Contains(args, "-r") && !Contains(args, "--root") {
var rootCheckBypass bool
// Create --root and -r flags for root check bypass
flag.BoolVar(&rootCheckBypass,"root", false, "Bypass root check")
flag.BoolVar(&rootCheckBypass,"r", false, "Bypass root check (shorthand)")
// Parse arguments for flags
flag.Parse()
// If flag not given
if !rootCheckBypass {
// If current user is root
if strings.Contains(currentUser.Username, "root") {
// Print warning message and exit
fmt.Println("Do not run as root, this program will invoke root for you if selected in config.")
fmt.Println("If you would like to bypass this, run this command with -r or --root.")
os.Exit(1)
}
} else {
if Contains(args, "-r") {
args = removeAtIndex(args, Find(args, "-r"))
} else if Contains(args, "--root") {
args = removeAtIndex(args, Find(args, "--root"))
}
}
// Create regex to remove all flags using ";;;" as it is uncommon to use in command line
flagRegex := regexp.MustCompile(`-+[^;]*;;;`)
// Join args into string
argsStr := strings.Join(args, ";;;")
// Remove all flags from join args
argsStr = flagRegex.ReplaceAllString(argsStr, "")
// Separate args back into slice
args = strings.Split(argsStr, ";;;")
// Define variables for config file location, and override state boolean
var configFileLocation string
var isOverridden bool
@ -118,7 +137,7 @@ func main() {
var similarTo []string
// Displays help message if no arguments provided or -h/--help is passed
if len(args) == 0 || Contains(args, "-h") || Contains(args, "--help") || Contains(args, "help") {
if len(args) == 0 || helpFlagGiven || Contains(args, "help") {
printHelpMessage(packageManagerCommand, useRootBool, rootCommand, commands, shortcuts, shortcutMappings, isOverridden)
os.Exit(0)
}
@ -149,9 +168,10 @@ func main() {
// If similarTo is still empty, log it fatally as something is wrong with the config or the code
if len(similarTo) == 0 { log.Fatalln("This command does not match any known commands or shortcuts") }
// Anonymous function to decide whether to print (overridden)
printOverridden := func() string { if isOverridden { return "(overridden)" } else { return "" } }
// Print text showing command being run and package manager being used
fmt.Println("Running:", strings.Title(similarTo[0]), "using", strings.Title(packageManagerCommand))
fmt.Println("Running:", strings.Title(similarTo[0]), "using", strings.Title(packageManagerCommand), printOverridden())
// Run package manager with the proper arguments passed if more than one argument exists
var cmdArr []string
// If root is to be used, append it to cmdArr