88 lines
2.1 KiB
Go
88 lines
2.1 KiB
Go
package arg
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import (
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"fmt"
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"os"
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)
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// This example demonstrates basic usage
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func Example() {
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// These are the args you would pass in on the command line
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os.Args = []string{"./example", "--foo=hello", "--bar"}
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var args struct {
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Foo string
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Bar bool
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}
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MustParse(&args)
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fmt.Println(args.Foo, args.Bar)
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}
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// This example demonstrates arguments that have default values
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func Example_defaultValues() {
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// These are the args you would pass in on the command line
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os.Args = []string{"--help"}
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var args struct {
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Foo string
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Bar bool
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}
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args.Foo = "default value"
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MustParse(&args)
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fmt.Println(args.Foo, args.Bar)
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}
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// This example demonstrates arguments that are required
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func Example_requiredArguments() {
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// These are the args you would pass in on the command line
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os.Args = []string{"--foo=1", "--bar"}
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var args struct {
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Foo string `arg:"required"`
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Bar bool
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}
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MustParse(&args)
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}
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// This example demonstrates positional arguments
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func Example_positionalArguments() {
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// These are the args you would pass in on the command line
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os.Args = []string{"./example", "in", "out1", "out2", "out3"}
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var args struct {
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Input string `arg:"positional"`
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Output []string `arg:"positional"`
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}
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MustParse(&args)
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fmt.Println("Input:", args.Input)
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fmt.Println("Output:", args.Output)
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}
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// This example demonstrates arguments that have multiple values
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func Example_multipleValues() {
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// The args you would pass in on the command line
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os.Args = []string{"--help"}
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var args struct {
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Database string
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IDs []int64
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}
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MustParse(&args)
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fmt.Printf("Fetching the following IDs from %s: %q", args.Database, args.IDs)
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}
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// This example shows the usage string generated by go-arg
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func Example_usageString() {
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// These are the args you would pass in on the command line
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os.Args = []string{"--help"}
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var args struct {
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Input string `arg:"positional"`
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Output []string `arg:"positional"`
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Verbose bool `arg:"-v,help:verbosity level"`
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Dataset string `arg:"help:dataset to use"`
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Optimize int `arg:"-O,help:optimization level"`
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}
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MustParse(&args)
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}
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