main.go

package main

import (
  "fmt"
  "os"
  "github.com/pgattic/canon/config"
  "github.com/pgattic/canon/manager"
  "github.com/pgattic/canon/referencer"
)

func displayHelp() {
  fmt.Println("Usage:", os.Args[0], "[COMMAND/REFERENCE] [OPTS]")
  fmt.Println()
  fmt.Println("Canon Book Referencer")
  fmt.Println()
  fmt.Println("Commands:")
  fmt.Println("  help                  Display this page")
  fmt.Println("  install [Repo URL]    Install canon package from repository")
  fmt.Println("  list                  List installed Canon packages")
  fmt.Println("  remove [Package]      Remove package by shortname")
  fmt.Println()
  fmt.Println("If anything besides these commands is given, the input is assumed to be a book")
  fmt.Println("reference, followed or preceded by any combination of these reference options:")
  fmt.Println()
  fmt.Println("Reference Options")
  fmt.Println("  -n, --numbered        Print verse/paragraph numbers before each line.")
  fmt.Println("  -p, --paragraph       Print the lines of text with an extra space in between")
  fmt.Println("                        them, as paragraphs.")
  fmt.Println("  -v, --verbose         Print extra information, like where the book was found.")
  fmt.Println("                        Useful for supplementary tools like canonmk. It is not")
  fmt.Println("                        recommended to use -n or -p with -v.")
  fmt.Println()
  fmt.Println("Canon made by Preston Corless (pgattic), free under the MIT License.")
  fmt.Println("More information can be found at https://github.com/pgattic/canon")
}

func main() {
  config.EnsureSetup() // Make sure there is a ~/.canon/texts/config.json file

  args := os.Args

  if len(args) < 2 {
    fmt.Println("Usage:", args[0], "[COMMAND/REFERENCE] [OPTS]")
    fmt.Println("Try \"" + args[0] + " help\" for more information.")
    return
  }
  
  switch args[1] {

  /* Package management arguments */
  case "install":
    if len(args) < 3 {
      fmt.Println("Please specify a canon-formatted repository (example: \"canon install https://github.com/user/repo\")")
      return
    }
    manager.Install(args[2])
    return
  case "remove":
    if len(args) < 3 {
      fmt.Println("Please specify a package to remove")
      return
    }
    manager.Remove(args[2])
    return
  case "list":
    manager.List()
    return
  case "help":
    displayHelp()
    return


  /* reference verse(s) */
  default:
    var execFlags referencer.Flags
    var refIdx int // index of the args that is the verse index (flags could be before or after the verse ref)
    for i := len(args)-1; i >= 1; i-- {
      if args[i][0] == '-' {
        if args[i][1] == '-' { // args starting with "--"
          switch args[i] {
          case "--paragraph":
            execFlags.Paragraph = true
          case "--verbose":
            execFlags.Verbose = true
          case "--numbered":
            execFlags.VerseNumbers = true
          }
          continue
        }
        for ch := 1; ch < len(args[i]); ch++ {
          switch args[i][ch] { // Execution flags
          case 'p':
            execFlags.Paragraph = true
          case 'v':
            execFlags.Verbose = true
          case 'n':
            execFlags.VerseNumbers = true
          }
        }
      } else {
        refIdx = i
      }
    }
    referencer.ParseRef(args[refIdx], execFlags)
  }
}