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|
package datamaps
import (
"log"
"os"
"path/filepath"
)
const (
configDirName = "datamaps-go"
dbName = "datamaps.db"
)
func getUserConfigDir() (string, error) {
dir, err := os.UserConfigDir()
if err != nil {
return "", err
}
configPath := filepath.Join(dir, configDirName)
return configPath, nil
}
func defaultDMPath() (string, error) {
dir, err := os.UserHomeDir()
if err != nil {
return "", err
}
return filepath.Join(dir, "Documents", "datamaps"), nil
}
// Options for the whole CLI application.
type Options struct {
Command string
DBPath string
DMPath string
DMName string
DMOverwrite bool
DMInitial bool
}
func defaultOptions() *Options {
dbpath, err := getUserConfigDir()
if err != nil {
log.Fatalf("Unable to get user config directory %v", err)
}
dmpath, err := defaultDMPath()
if err != nil {
log.Fatalf("Unable to get default datamaps directory %v", err)
}
return &Options{
Command: "help",
DBPath: filepath.Join(dbpath, dbName),
DMPath: dmpath,
DMName: "Unnamed Datamap",
DMOverwrite: false,
DMInitial: false,
}
}
// nextString get the next string in a slice.
func nextString(args []string, i *int, message string) string {
if len(args) > *i+1 {
*i++
} else {
log.Fatal(message)
}
return args[*i]
}
func processOptions(opts *Options, allArgs []string) {
switch allArgs[0] {
case "server":
opts.Command = "server"
case "datamap":
opts.Command = "datamap"
case "setup":
opts.Command = "setup"
default:
log.Fatal("No relevant command provided.")
}
restArgs := allArgs[1:]
for i := 0; i < len(allArgs[1:]); i++ {
arg := restArgs[i]
switch arg {
case "-i", "--import":
opts.DMPath = nextString(restArgs, &i, "import path required")
case "-n", "--name":
opts.DMName = nextString(restArgs, &i, "datamap name required")
case "--overwrite":
opts.DMOverwrite = true
case "--initial":
opts.DMInitial = true
}
}
}
//ParseOptions for CLI.
func ParseOptions() *Options {
opts := defaultOptions()
processOptions(opts, os.Args[1:])
return opts
}
|
