mdw@git.distorted.org.uk Git - sod/blob - src/frontend.lisp

   1 ;;; -*-lisp-*-
   2 ;;;
   3 ;;; User interface
   4 ;;;
   5 ;;; (c) 2013 Straylight/Edgeware
   6 ;;;
   7
   8 ;;;----- Licensing notice ---------------------------------------------------
   9 ;;;
  10 ;;; This file is part of the Sensible Object Design, an object system for C.
  11 ;;;
  12 ;;; SOD is free software; you can redistribute it and/or modify
  13 ;;; it under the terms of the GNU General Public License as published by
  14 ;;; the Free Software Foundation; either version 2 of the License, or
  15 ;;; (at your option) any later version.
  16 ;;;
  17 ;;; SOD is distributed in the hope that it will be useful,
  18 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;;; GNU General Public License for more details.
  21 ;;;
  22 ;;; You should have received a copy of the GNU General Public License
  23 ;;; along with SOD; if not, write to the Free Software Foundation,
  24 ;;; Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  25
  26 (cl:defpackage #:sod-frontend
  27   (:use #:common-lisp #:sod-utilities #:optparse #:sod #:sod-parser)
  28   (:shadowing-import-from #:optparse #:int))
  29
  30 (cl:in-package #:sod-frontend)
  31
  32 ;;;--------------------------------------------------------------------------
  33 ;;; Preparation for dumping.
  34
  35 (clear-the-decks)
  36 (exercise)
  37
  38 ;;;--------------------------------------------------------------------------
  39 ;;; The main program.
  40
  41 (defvar-unbound *option-parser*
  42   "The program's main option parser.")
  43
  44 (eval-when (:compile-toplevel :load-toplevel :execute)
  45   (defopthandler dirpath (var arg) ()
  46     "Convert the argument into a pathname with a directory component
  47      and no file component, suitable for merging."
  48
  49     ;; This is really fiddly and annoying.  Unix pathnames don't tell you
  50     ;; whether the thing named is meant to be a directory or not, and
  51     ;; implementations differ as to how they cope with pathnames which do or
  52     ;; don't name directories when they're expecting files, or vice versa.
  53
  54     (let ((path (ignore-errors (pathname arg))))
  55       (cond ((null path)
  56              ;; The namestring couldn't be parsed, or something else went
  57              ;; horribly wrong.
  58
  59              (option-parse-error "Can't parse `~A' as a path" arg))
  60
  61             #+unix
  62             ((or (pathname-name path) (pathname-type path))
  63              ;; If this is Unix, or similar, then stick the filename piece on
  64              ;; the end of the directory and hope that was sensible.
  65
  66              (setf var (make-pathname
  67                         :name nil :type nil :defaults path
  68                         :directory (append (or (pathname-directory path)
  69                                                (list :relative))
  70                                            (list (file-namestring path))))))
  71
  72             (t
  73              ;; This actually looks like a plain directory name.
  74
  75              (setf var path))))))
  76
  77 (defun update-usage ()
  78   (setf *usage* (simple-usage *options* "SOURCES...")))
  79
  80 (export 'main)
  81 (defun main ()
  82
  83   ;; Initialize the argument parser.
  84   (set-command-line-arguments)
  85
  86   ;; Collect information from the command line options.
  87   (let ((output-reasons nil)
  88         (output-path (make-pathname :directory '(:relative)))
  89         (backtracep nil)
  90         (builtinsp nil)
  91         (stdoutp nil)
  92         (args nil))
  93
  94     ;; Option definitions.
  95     (define-program
  96       :help "Process SOD input files to produce (e.g.) C output."
  97       :version *sod-version*
  98       :options (options
  99                 (help-options :short-version #\V)
 100                 "Translator options"
 101                 (#\I "include" (:arg "DIR")
 102                      ("Search DIR for module imports.")
 103                      (list *module-dirs* 'string))
 104                 ("backtrace"
 105                      ("Print a Lisp backtrace on error (for debugging).")
 106                      (set backtracep))
 107                 ("builtins"
 108                      ("Process the builtin `sod-base' module.")
 109                      (set builtinsp))
 110                 (#\d "directory" (:arg "DIR")
 111                      ("Write output files to DIR.")
 112                      (dirpath output-path))
 113                 (#\p "stdout"
 114                      ("Write output files to standard output.")
 115                      (set stdoutp))
 116                 (#\t "type" (:arg "OUT-TYPE")
 117                      ("Produce output of type OUT-TYPE.")
 118                      (list output-reasons 'keyword))))
 119     (update-usage)
 120
 121     ;; Actually parse the options.
 122     (let ((*option-parser* (make-option-parser)))
 123       (unless (and (option-parse-try
 124                      (do-options (:parser *option-parser*)
 125                        (nil (rest)
 126                             (setf args rest))))
 127                    (or builtinsp args))
 128         (die-usage)))
 129
 130     ;; Do the main parsing job.
 131     (labels ((hack-module (module)
 132                ;; Process the MODULE, writing out the generated code.
 133
 134                ;; Work through each output type in turn.
 135                (dolist (reason output-reasons)
 136
 137                  ;; Arrange to be able to recover from errors.
 138                  (restart-case
 139
 140                      ;; Collect information for constructing the output
 141                      ;; filenames here.  In particular,
 142                      ;; `output-type-pathname' will sanity-check the
 143                      ;; output type for us, which is useful even if
 144                      ;; we're writing to stdout.
 145                      (let ((outpath (output-type-pathname reason))
 146                            (modpath (module-name module)))
 147
 148                        (if stdoutp
 149
 150                            ;; If we're writing to stdout then just do
 151                            ;; that.
 152                            (output-module module reason
 153                                           *standard-output*)
 154
 155                            ;; Otherwise we have to construct an output
 156                            ;; filename the hard way.
 157                            (with-open-file
 158                                (stream
 159                                 (reduce #'merge-pathnames
 160                                         (list output-path
 161                                               outpath
 162                                               (make-pathname
 163                                                :directory nil
 164                                                :defaults modpath))
 165                                         :from-end t)
 166                                 :direction :output
 167                                 :if-exists :supersede
 168                                 :if-does-not-exist :create)
 169                              (output-module module reason stream))))
 170
 171                    ;; Error recovery.
 172                    (continue ()
 173                      :report (lambda (stream)
 174                                (format stream
 175                                        "Skip output type `~(~A~)'"
 176                                        reason))
 177                      nil))))
 178
 179              (hack-modules ()
 180
 181                ;; If there are no output types then there's nothing to do.
 182                (unless output-reasons
 183                  (error "No output types given: nothing to do"))
 184
 185                ;; If we're writing the builtin module then now seems like a
 186                ;; good time to do that.
 187                (when builtinsp
 188                  (hack-module *builtin-module*))
 189
 190                ;; Parse and write out the remaining modules.
 191                (dolist (arg args)
 192                  (let ((module (read-module arg)))
 193                    (when (zerop (module-errors module))
 194                      (hack-module module))))))
 195
 196       (if backtracep (hack-modules)
 197           (multiple-value-bind (hunoz nerror nwarn)
 198               (count-and-report-errors ()
 199                 (with-default-error-location
 200                     ((make-file-location *program-name*))
 201                   (hack-modules)))
 202             (declare (ignore hunoz))
 203             (when (or (plusp nerror) (plusp nwarn))
 204               (format *error-output* "~A: Finished with~
 205                                       ~[~:; ~:*~D error~:P~[~:; and~]~:*~]~
 206                                       ~[~:; ~:*~D warning~:P~]~%"
 207                       *program-name* nerror nwarn))
 208             (exit (if (plusp nerror) 2 0)))))))
 209
 210 ;;;----- That's all, folks --------------------------------------------------