#lang racket/base

;; Command-line parsing is in its own module because it has to be used
;;  both in setup.ss (pre-zo, pre-cm) and setup-go.rkt (use zos and cm).
;; This means that command lines will be parsed twice.

(require racket/cmdline
         raco/command-name
         "private/command-name.rkt")

(provide parse-cmdline)

;; The result of parse-cmdline is three lists:
;;  - An assoc list mapping flag symbols to booleans
;;     (nearly all symbols correspond to parameter names
;;      in setup-go.rkt)
;;  - A list of specific collections
;;  - A list of archives

(define (parse-cmdline argv)

  (define x-specific-planet-packages '())
  (define x-flags null)
  (define (add-flags l)
    (set! x-flags (append (reverse l) x-flags)))

  (define-values (short-name long-name raco?) (get-names))

  ;; Beware of the poor-man's duplicate of this command-line specification
  ;; in "main.rkt"!
  (define-values (x-specific-collections x-archives)
    (command-line
     #:program long-name
     #:argv argv
     #:once-each
     [("-c" "--clean") "Delete existing compiled files; implies -nxi"
      (add-flags '((clean #t)
                   (make-zo #f)
                   (call-install #f)
                   (make-launchers #f)
                   (make-info-domain #f)
                   (make-docs #f)))]
     [("-j" "--workers") workers "Use <#> parallel-workers"
      (add-flags `((parallel-workers ,(string->number workers))))]
     [("-n" "--no-zo") "Do not produce .zo files"
      (add-flags '((make-zo #f)))]
     [("-x" "--no-launcher") "Do not produce launcher programs"
      (add-flags '((make-launchers #f)))]
     [("-i" "--no-install") "Do not call collection-specific pre-installers"
      (add-flags '((call-install #f)))]
     [("-I" "--no-post-install") "Do not call collection-specific post-installers"
      (add-flags '((call-post-install #f)))]
     [("-d" "--no-info-domain") "Do not produce info-domain caches"
      (add-flags '((make-info-domain #f)))]
     [("-D" "--no-docs") "Do not produce documentation"
      (add-flags '((make-docs #f)))]
     [("-U" "--no-user") "Do not setup user-specific collections (implies --no-planet)"
      (add-flags '((make-user #f) (make-planet #f)))]
     [("--no-planet") "Do not setup PLaneT packages"
      (add-flags '((make-planet #f)))]
     [("--avoid-main") "Do not make main-installation files"
      (add-flags '((avoid-main-installation #t)))]
     [("-v" "--verbose") "See names of compiled files and info printfs"
      (add-flags '((verbose #t)))]
     [("-m" "--make-verbose") "See make and compiler usual messages"
      (add-flags '((make-verbose #t)))]
     [("-r" "--compile-verbose") "See make and compiler verbose messages"
      (add-flags '((make-verbose #t)
                   (compiler-verbose #t)))]
     [("--trust-zos") "Trust existing .zos (use only with prepackaged .zos)"
      (add-flags '((trust-existing-zos #t)))]
     [("-p" "--pause") "Pause at the end if there are any errors"
      (add-flags '((pause-on-errors #t)))]
     [("--force") "Treat version mismatches for archives as mere warnings"
      (add-flags '((force-unpacks #t)))]
     [("-a" "--all-users") "Install archives to main (not user-specific) installation"
      (add-flags '((all-users #t)))]
     [("--mode") mode "Select a compilation mode"
      (add-flags `((compile-mode ,mode)))]
     [("--doc-pdf") dir "Write doc PDF to <dir>"
      (add-flags `((doc-pdf-dest ,dir)))]
     [("-l") => (lambda (flag . collections)
                  (check-collections short-name collections)
                  (cons 'collections (map list collections)))
             '("Setup specific <collection>s only" "collection")]
     [("-A") => (λ (flag . archives)
                  (cons 'archives archives))
             '("Unpack and install <archive>s" "archive")]
     #:multi
     [("-P") owner package-name maj min
      "Setup specified PLaneT packages only"
      (set! x-specific-planet-packages (cons (list owner package-name maj min)
                                             x-specific-planet-packages))]
     #:handlers
     (lambda (collections/archives . rest)
       (let ([pre-archives (if (and (pair? collections/archives)
                                    (eq? (caar collections/archives) 'archives))
                               (cdr (car collections/archives))
                               '())]
             [pre-collections (if (and (pair? collections/archives)
                                       (eq? (caar collections/archives) 'collections))
                                  (cdr (car collections/archives))
                                  '())])
         (cond
         [raco?
          (check-collections short-name rest)
          (values (append pre-collections (map list rest))
                  pre-archives)]
         [else
          (values pre-collections
                  (append pre-archives rest))])))
     (if raco? '("collection") '("archive"))
     (lambda (s)
       (display s)
       (if raco?
           (printf "If no <collection> is specified, all collections are setup\n")
           (printf "If no <archive> or -l <collection> is specified, all collections are setup\n"))
       (exit 0))))

    (values short-name x-flags x-specific-collections x-specific-planet-packages x-archives))

(define (check-collections name collections)
  (for ((v (in-list collections)))
    ;; A normal-form collection path matches a symbolic module path;
    ;; this is a bit of a hack, but it's not entirely a coincidence:
    (unless (module-path? (string->symbol v))
      (raise-user-error (string->symbol name)
                        "bad collection path~a: ~a"
                        (cond [(regexp-match? #rx"/$" v)
                               " (trailing slash not allowed)"]
                              [(regexp-match? #rx"\\\\" v)
                               " (backslash not allowed)"]
                              [else ""])
                        v))))
