80 lines
2.4 KiB
Go
80 lines
2.4 KiB
Go
package main
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/*
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This simply parses the command line arguments using the default golang
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package called 'flag'. This can be used as a simple template to parse
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command line arguments in other programs.
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It puts everything in the 'config' package which I think is a good
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wrapper around the 'flags' package and doesn't need a whole mess of
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global variables
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*/
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import "log"
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import "os"
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import "flag"
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import "fmt"
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import "github.com/gookit/config"
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var customUsage = func() {
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fmt.Fprintf(flag.CommandLine.Output(), "Usage of %s:\n", os.Args[0])
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flag.PrintDefaults()
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fmt.Println("")
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fmt.Println("EXAMPLES:")
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fmt.Println("")
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fmt.Println(os.Args[0] + " --width 1024 --height 768 --drift .1 --filename shaders/seascape.glsl")
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fmt.Println(os.Args[0] + " --width 640 --height 480 --filename shaders/planetfall.glsl")
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fmt.Println("")
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}
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func parseFlags() {
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var version string
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var race bool
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var filename string
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var width int
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var height int
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var glDrift float64
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flag.StringVar (&version, "version", "v0.1", "Set compiled in version string")
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flag.StringVar (&filename, "filename", "shaders/seascape.glsl", "path to GLSL file")
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flag.IntVar (&width, "width", 1024, "Width of the OpenGL Window")
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flag.IntVar (&height, "height", 768, "Height of the OpenGL Window")
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flag.Float64Var (&glDrift, "drift", 0.01, "Speed of the gradual camera drift")
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flag.BoolVar (&race, "race", race, "Use race detector")
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// Set the output if something fails to stdout rather than stderr
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flag.CommandLine.SetOutput(os.Stdout)
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flag.Usage = customUsage
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flag.Parse()
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if flag.Parsed() {
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log.Println("flag.Parse() worked")
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} else {
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log.Println("flag.Parse() failed")
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}
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// keys := []string{"filename", "width", "height", "drift"}
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// keys := []string{"width", "height", "drift"}
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// keys := []string{"height"}
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// config.LoadFlags(keys)
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config.Set("width", width)
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config.Set("height", height)
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config.Set("glDrift", glDrift)
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config.Set("filename", filename)
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}
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func parseConfig() {
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config.WithOptions(config.ParseEnv)
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parseFlags()
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// config.LoadOSEnv([]string{"MAIL"})
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// config.LoadOSEnv([]string{"USER"})
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// config.LoadOSEnv([]string{"BUILDDEBUG"})
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}
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