X-Git-Url: https://code.consxy.com/gitweb/gitweb.cgi?p=wolf;a=blobdiff_plain;f=src%2Fmain%2Fwolf.lisp;fp=src%2Fmain%2Fwolf.lisp;h=d6f60e3db3f43462aaf3f66e5c2d26eac99f02fd;hp=0000000000000000000000000000000000000000;hb=981fd3d9a7ad7e2b2dc4e92c5b594e6b2684a888;hpb=5a49e356591a22a60b66a8064bf8ff7371a55075

diff --git a/src/main/wolf.lisp b/src/main/wolf.lisp
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@@ -0,0 +1,319 @@
+(in-package #:wolf)
+
+; Some thoughts
+; - form starting reader macros will have to be hand added to this code
+; - exceptions will eventually arise, and the rule file will have to be changed
+; - the proper formatting of "loop" is weird
+
+(define-condition check-failure nil ((msg :initarg :msg :reader check-failure-msg)
+                                     (line-no :initarg :line-no :reader check-failure-line-no)
+                                     (col-no :initarg :col-no :reader check-failure-col-no)))
+
+(defvar *state* nil)
+(defvar *line-no* nil)
+(defvar *col-no* nil)
+(defvar *evaluators* nil)
+(defvar *form-stack* nil)
+(defvar *form-ended-on-same-line* nil)
+
+(eval-when (:compile-toplevel :load-toplevel :execute)
+ (defparameter *possible-states*
+  '(:begin ; start of file
+    :normal ; normal processing
+    :beginning-of-line
+    :beginning-of-line-with-separator ; empty space in there
+    :beginning-of-symbols
+    :beginning-of-symbols-with-separator
+    :comment-with-separator ; weird edge case for pre-function comments
+    :beginning-of-line-with-comment-and-separator ; weird edge case part 2
+    :first-symbol ; first symbol of form/line
+    :all ; matches everything
+    :in-string)))
+
+(defun set-state (state)
+ (when (not (find state *possible-states*))
+  (error "Can't set state to ~A" state))
+ (setf *state* state)
+ nil)
+
+(defmacro defevaluator (state match func)
+ (when (not (find state *possible-states*)) (error "~A is an invalid state" state))
+ (let
+  ((scanner (gensym)))
+  `(let
+    ((,scanner (when (stringp ,match) (cl-ppcre:create-scanner ,match))))
+    (pushnew
+     (list
+      (lambda (state text)
+       (and
+        (or (eql :all ,state) (eql ,state state))
+        (or
+         (and (symbolp text) (eql text ,match))
+         (and
+          ,scanner
+          (stringp text)
+          (multiple-value-bind (start end) (cl-ppcre:scan ,scanner text)
+           (and start end (= 0 start)))))))
+      (lambda (text) (second (multiple-value-list (cl-ppcre:scan ,scanner text))))
+      ,func)
+     *evaluators*))))
+
+(defun evaluate (text)
+ (if (string= "" text)
+  (let*
+   ((evaluator (find-if (lambda (f) (funcall f *state* :eof)) *evaluators* :from-end t :key #'car))
+    (problem (when evaluator (funcall (third evaluator)))))
+   (when problem (error (make-condition 'check-failure :msg problem :line-no *line-no* :col-no *col-no*))))
+  (let
+   ((evaluator (find-if (lambda (f) (funcall f *state* text)) *evaluators* :from-end t :key #'car)))
+   (when (not evaluator)
+    (error
+     (make-condition 'check-failure
+      :msg (format nil "Can't check in state ~S: ~S..."
+            *state* (subseq text 0 (min (length text) 10))) :line-no *line-no* :col-no *col-no*)))
+   (let
+    ((problem (funcall (third evaluator))))
+    (when problem
+     (error (make-condition 'check-failure :msg problem :line-no *line-no* :col-no *col-no*)))
+    (let
+     ((length-of-match (funcall (cadr evaluator) text)))
+     (incf *col-no* length-of-match)
+     (when (< 120 *col-no*)
+      (error (make-condition 'check-failure :msg "Line longer than 120 characters" :line-no *line-no* :col-no 0)))
+     (evaluate (subseq text length-of-match)))))))
+
+(defun slurp-file (filename &key (element-type 'character) (sequence-type 'string))
+ (with-open-file (str filename :element-type element-type)
+  (let ((seq (make-sequence sequence-type (file-length str)))) (read-sequence seq str) seq)))
+
+(defun check-file (file)
+ "CHECK-FILE FILE => RESULT
+
+  RESULT: SUCCESS-RESULT | FAILURE-RESULT
+  SUCCESS-RESULT: (:success FILENAME)
+  FAILURE-RESULT: (:success FILENAME MSG LINE-NO COL-NO)
+
+ARGUMENTS AND VALUES:
+
+  FILE: a pathname
+  FILENAME: the file this check was run on
+  MSG: a string containing the failure message
+  LINE-NO: an integer, the line number on which the failure appeared
+  COL-NO: an integer, the column number on which the failure appeared
+
+DESCRIPTION:
+
+  CHECK-FILE runs all the checks against a file and returns
+  as soon as the first style error is found.
+
+EXAMPLES:
+
+  (check-file #P\"path/to/file.lisp\") => (:success \"path/to/file.lisp\")
+  (check-file #P\"path/to/error.lisp\") => (:failure \"path/to/error.lisp\" \"File cannot end with empty line\" 20 0)"
+
+ (if (string= "package" (pathname-name file))
+  (set-state :normal)
+  (set-state :begin))
+ (setf *line-no* 0)
+ (setf *col-no* 0)
+ (setf *form-stack* nil)
+ (setf *form-ended-on-same-line* nil)
+ (handler-case
+  (progn
+   (evaluate (slurp-file file))
+   (list :success file))
+  (check-failure (cf)
+   (list :failure file (check-failure-msg cf) (check-failure-line-no cf) (check-failure-col-no cf)))))
+
+(defun check-directory (dir)
+ "CHECK-DIRECTORY DIR => RESULTS
+
+  RESULTS: RESULT*
+
+ARGUMENTS AND VALUES:
+
+  DIR: A directory to recurse into and check files
+  RESULT: A result as returned by check-file
+
+DESCRIPTION:
+
+  CHECK-DIRECTORY grabs all .lisp files in the tree under DIR, and loads
+  checks them all.
+
+  The results are then put together into a list which can be programatically
+  evaluated.  As opposed to pretty-print-check-directory, this function doesn't
+  clutter up your standard out."
+ (mapcar #'check-file (directory (format nil "~A/**/*.lisp" dir))))
+
+(defun any-failures (checks)
+ (find :failure checks :key #'car))
+
+(defun print-failure (failure)
+ (format nil
+  "Style error in ~A at ~A:~A: ~A~%- ~A~%~VT^"
+  (second failure)
+  (1+ (fourth failure))
+  (1+ (fifth failure))
+  (third failure)
+  (with-open-file (str (second failure)) (loop :repeat (fourth failure) :do (read-line str)) (read-line str))
+  (+ (fifth failure) 2)))
+
+(defun pretty-print-check-directory (dir)
+ "PRETTY-PRINT-CHECK-DIRECTORY DIR => SUCCESS
+
+ARGUMENTS AND VALUES:
+
+  DIR: A directory to recurse into and check files
+  SUCCESS: T if there were no failures
+
+DESCRIPTION:
+
+  PRETTY-PRINT-CHECK-DIRECTORY checks DIR for any errors, dumping them to output
+  and returning a single flag.
+
+  Unlike check-directory, PRETTY-PRINT-CHECK-DIRECTORY is built for continuous
+  integration, dumping errors to standard out and returning a singular result.
+
+EXAMPLES:
+
+  (pretty-print-check-directory \"src\") => nil"
+ (let
+  ((checks (check-directory dir)))
+  (format t "In ~A: Checked ~A files with ~A failures~%~%"
+   dir (length checks) (length (remove :success checks :key #'car)))
+  (format t "~{~A~%~}" (mapcar #'print-failure (remove :success checks :key #'car)))
+  (not (any-failures checks))))
+
+; These are in reverse order
+(defevaluator :beginning-of-symbols " *;[^\\n]*"
+ (lambda () (set-state :normal)))
+
+(defevaluator :beginning-of-symbols-with-separator " *;[^\\n]*"
+ (lambda () (set-state :comment-with-separator)))
+
+(defevaluator :normal " *;[^\\n]*"
+ (lambda () (set-state :normal)))
+
+(defevaluator :normal "\\("
+ (lambda ()
+  (push (list *line-no* *col-no*) *form-stack*)
+  (set-state :first-symbol)))
+
+(defevaluator :first-symbol "\\("
+ (lambda ()
+  (cond
+   ((and (not *form-stack*) (not (zerop *col-no*))) "Top level forms must begin on first column")
+   ((and *form-stack* (/= (1+ (cadr (car *form-stack*))) *col-no*))
+    "All form elements must be indented equally")
+   (t
+    (push (list *line-no* *col-no*) *form-stack*)
+    (set-state :first-symbol)))))
+
+(defevaluator :all "\\t" (constantly "Must not use tabs"))
+
+(defevaluator :begin "\\(in-package[^\\)]*\\)" (lambda () (set-state :normal)))
+
+(defevaluator :beginning-of-line-with-separator :eof
+ (lambda ()
+  (incf *line-no* -1)
+  "Must not end with empty line"))
+
+(defevaluator :beginning-of-line-with-separator "\\n" (constantly "Must not have two empty lines in a row"))
+
+(defevaluator :begin ".*" (constantly "Must begin with in-package form"))
+
+(defevaluator :all "\\( *in-package " (constantly "Only one in-package per file"))
+
+(defevaluator :normal "\\n"
+ (lambda ()
+  (incf *line-no*)
+  (setf *col-no* -1)
+  (set-state :beginning-of-line)))
+
+(defevaluator :comment-with-separator "\\n"
+ (lambda ()
+  (incf *line-no*)
+  (setf *col-no* -1)
+  (set-state :beginning-of-line-with-comment-and-separator)
+  nil))
+
+(defevaluator :normal " +\\n" (constantly "No whitespace at end of line"))
+
+(defevaluator :beginning-of-line " *" (lambda () (set-state :beginning-of-symbols)))
+
+(defevaluator :beginning-of-line-with-separator " *" (lambda () (set-state :beginning-of-symbols-with-separator)))
+
+(defevaluator :beginning-of-line-with-comment-and-separator "\\n"
+ (lambda ()
+  (progn
+   (incf *line-no*)
+   (setf *col-no* -1)
+   (set-state :beginning-of-line-with-separator))))
+
+(defevaluator :beginning-of-line-with-comment-and-separator " *"
+ (lambda () (set-state :beginning-of-symbols-with-separator)))
+
+(defevaluator :beginning-of-symbols "\\n"
+ (lambda ()
+  (if
+   (< 0 *col-no*)
+   "No whitespace only lines"
+   (progn
+    (incf *line-no*)
+    (setf *col-no* -1)
+    (set-state :beginning-of-line-with-separator)))))
+
+(defevaluator :beginning-of-symbols "\\)" (constantly "No hanging close parens"))
+
+(defevaluator :beginning-of-symbols-with-separator "\\)" (constantly "No hanging close parens"))
+
+(defevaluator :beginning-of-symbols ""
+ (lambda ()
+  (if
+   (and (not *form-stack*) (not *form-ended-on-same-line*))
+   "Multiline top level forms must be separated by a space"
+   (set-state :first-symbol))))
+
+(defevaluator :beginning-of-symbols-with-separator ""
+ (lambda ()
+  (set-state :first-symbol)))
+
+(defevaluator :normal "\\)"
+ (lambda ()
+  (let
+   ((form (pop *form-stack*)))
+   (cond
+    ((not form) "Unmatched ending paren")
+    ((< 50 (- *line-no* (car form))) "Forms can't be over 50 lines long")
+    (t (setf *form-ended-on-same-line* (= *line-no* (car form))) nil)))))
+
+(defevaluator :normal "::" (constantly "No internal symbols from other packages"))
+
+(defevaluator :in-string "\\\\\"" (constantly nil))
+
+(defevaluator :normal "\"" (lambda () (set-state :in-string)))
+
+(defevaluator :in-string "\"" (lambda () (set-state :normal)))
+
+(defevaluator :in-string "\\n"
+ (lambda ()
+  (incf *line-no*)
+  (setf *col-no* -1)
+  nil))
+
+(defevaluator :in-string "." (constantly nil))
+
+(defevaluator :first-symbol "\\n" (constantly "No new line after opening form"))
+
+(defevaluator :first-symbol " " (constantly "No space after opening parens"))
+
+(defevaluator :first-symbol ""
+ (lambda ()
+  (cond
+   ((and *form-stack* (/= (1+ (cadr (car *form-stack*))) *col-no*))
+    "All form elements must be indented equally")
+   (t (set-state :normal)))))
+
+(defevaluator :normal "  " (constantly "Only one space between items of a form"))
+
+(defevaluator :normal "." (constantly nil))