allow custom args

.github/workflows/build-test.yml

@@ -12,7 +12,7 @@ jobs:
     name: Test Builds
     strategy:
       matrix:
-        go-version: [1.20.x]
+        go-version: [1.21.x]
         os: [ubuntu-latest, windows-latest, macOS-latest]
 
     runs-on: ${{ matrix.os }}

.github/workflows/lint-test.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.20.x
+          go-version: 1.21.x
       - name: Run golangci-lint
         uses: golangci/golangci-lint-action@v3.3.0
         with:

go.mod

@@ -1,6 +1,6 @@
 module github.com/projectdiscovery/goflags
 
-go 1.20
+go 1.21
 
 require (
 	github.com/cnf/structhash v0.0.0-20201127153200-e1b16c1ebc08
@@ -11,6 +11,7 @@ require (
 )
 
 require (
+	github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 // indirect
 	github.com/mattn/go-isatty v0.0.19 // indirect
 	github.com/miekg/dns v1.1.56 // indirect
 	github.com/projectdiscovery/blackrock v0.0.1 // indirect

go.sum

@@ -6,6 +6,8 @@ github.com/cnf/structhash v0.0.0-20201127153200-e1b16c1ebc08 h1:ox2F0PSMlrAAiAdk
 github.com/cnf/structhash v0.0.0-20201127153200-e1b16c1ebc08/go.mod h1:pCxVEbcm3AMg7ejXyorUXi6HQCzOIBf7zEDVPtw0/U4=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 h1:El6M4kTTCOh6aBiKaUGG7oYTSPP8MxqL4YI3kZKwcP4=
+github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510/go.mod h1:pupxD2MaaD3pAXIBCelhxNneeOaAeabZDe5s4K6zSpQ=
 github.com/gorilla/css v1.0.0 h1:BQqNyPTi50JCFMTw/b67hByjMVXZRwGha6wxVGkeihY=
 github.com/gorilla/css v1.0.0/go.mod h1:Dn721qIggHpt4+EFCcTLTU/vk5ySda2ReITrtgBl60c=
 github.com/mattn/go-isatty v0.0.19 h1:JITubQf0MOLdlGRuRq+jtsDlekdYPia9ZFsB8h/APPA=
@@ -39,6 +41,7 @@ golang.org/x/mod v0.12.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
 golang.org/x/net v0.23.0 h1:7EYJ93RZ9vYSZAIb2x3lnuvqO5zneoD6IvWjuhfxjTs=
 golang.org/x/net v0.23.0/go.mod h1:JKghWKKOSdJwpW2GEx0Ja7fmaKnMsbu+MWVZTokSYmg=
 golang.org/x/sync v0.6.0 h1:5BMeUDZ7vkXGfEr1x9B4bRcTH4lpkTkpdh0T/J+qjbQ=
+golang.org/x/sync v0.6.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.18.0 h1:DBdB3niSjOA/O0blCZBqDefyWNYveAYMNF1Wum0DYQ4=
 golang.org/x/sys v0.18.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=

goflags.go

@@ -14,6 +14,7 @@ import (
 	"time"
 
 	"github.com/cnf/structhash"
+	"github.com/google/shlex"
 	fileutil "github.com/projectdiscovery/utils/file"
 	folderutil "github.com/projectdiscovery/utils/folder"
 	permissionutil "github.com/projectdiscovery/utils/permission"
@@ -106,10 +107,14 @@ func (flagSet *FlagSet) MergeConfigFile(file string) error {
 }
 
 // Parse parses the flags provided to the library.
-func (flagSet *FlagSet) Parse() error {
+func (flagSet *FlagSet) Parse(args ...string) error {
 	flagSet.CommandLine.SetOutput(os.Stdout)
 	flagSet.CommandLine.Usage = flagSet.usageFunc
-	_ = flagSet.CommandLine.Parse(os.Args[1:])
+	toParse := os.Args[1:]
+	if len(args) > 0 {
+		toParse = args
+	}
+	_ = flagSet.CommandLine.Parse(toParse)
 	configFilePath, _ := flagSet.GetConfigFilePath()
 
 	// migrate data from old config dir to new one
@@ -812,3 +817,10 @@ func isZeroValue(f *flag.Flag, value string) bool {
 func normalizeGroupDescription(description string) string {
 	return strings.ToUpper(description)
 }
+
+// GetArgsFromString allows splitting a string into arguments
+// following the same rules as the shell.
+func GetArgsFromString(str string) []string {
+	args, _ := shlex.Split(str)
+	return args
+}