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yasim.lsp
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#!/usr/bin/newlisp
;; @author nkmathew <[email protected]>
;; @date 20th November 2013
;; Translated from the python version.
(define __version__ "2.1.0")
(define [backup-dir] 0)
(define [default-indent] 1)
(define [dialect] 2)
(define [files] 3)
(define [indent-comments] 4)
(define [backup] 5)
(define [compact] 6)
(define [warning] 7)
(define [modify] 8)
(define [output] 9)
(define [uniform] 10)
(define [output-file] 11)
(define [indent-size] 12)
(define [read-rc] 13)
(define [backup-suffix] 14)
(define [tab-width] 15)
(define [message] 0)
(define [line] 1)
(define [column] 2)
(define (parse-args (arguments))
" Reads command-line arguments. The arguments can be in a flat list or a string
Commandline arguments will instead be read from if no arguments are passed in
the function call
"
(letn ((print-version (lambda ()
(printf "yasi v%s" __version__)
(exit)))
(bool? (lambda (val)
(or (= nil val) (= true val))))
(to-int
(lambda (str (default-num 1))
(let (num (int str))
(if (null? num)
default-num
num))))
(option-arg?
(lambda (arg)
(or
(matches-opt? "-tab" arg)
(matches-opt? "-suffix" arg)
(matches-opt? "-no-rc" arg)
(matches-opt? "-nr" arg)
(matches-opt? "-indent-size" arg)
(matches-opt? "-is" arg)
(matches-opt? "-version" arg)
(matches-opt? "-v" arg)
(matches-opt? "-o" arg)
(matches-opt? "-output" arg)
(matches-opt? "-dialect" arg)
(matches-opt? "-bd" arg)
(matches-opt? "-backup-dir" arg)
(matches-opt? "-nb" arg)
(matches-opt? "-no-backup" arg)
(matches-opt? "-nc" arg)
(matches-opt? "-no-compact" arg)
(matches-opt? "-no-output" arg)
(matches-opt? "-nm" arg)
(matches-opt? "-no-modify" arg)
(matches-opt? "-uni" arg)
(matches-opt? "-uniform" arg)
(matches-opt? "-ic" arg)
(matches-opt? "-indent-comments" arg))))
(option-list?
(lambda (lst)
(and
(>= (length lst) 15) ;; There are at least 15 options now
(list? lst)
(string? (lst [backup-dir]))
(number? (lst [default-indent]))
(string? (lst [dialect]))
(list? (lst [files]))
(bool? (lst [indent-comments]))
(bool? (lst [backup]))
(bool? (lst [compact]))
(bool? (lst [warning]))
(bool? (lst [modify])))))
(options (list
(real-path) ;; Backup directory
1 ;; Default indent
"" ;; Dialect
'() ;; Input files
nil ;; Indent comments
true ;; Backup
true ;; Compact
true ;; Warning
true ;; Modify
true ;; Output
nil ;; Uniform
"" ;; Output filename
2 ;; Indent size
true ;; Read rc file
".yasi.bak~" ;; Backup file suffix
-1 ;; Tab width
))
(matches-opt? (lambda (opt var)
(regex (string "^[-]*" opt) var)))
(arguments
(if (string? arguments)
(parse arguments)
(if (list? arguments)
arguments
(if (null? arguments)
(slice $main-args 2)
'()))))
(print-help (lambda () (println *help*) (exit))))
(if (option-list? arguments)
arguments
(let ((i 0) (option-arg-encountered nil))
(while (!= i (length arguments))
(set 'curr (arguments i))
(set 'prev (arguments (if (zero? i) 0 (- i 1))))
(++ i)
(when (option-arg? curr)
(set 'option-arg-encountered true))
;; (when (= prev curr)
;; (set 'curr ""))
(if (not option-arg-encountered)
;; Anything not an argument is considered the path of a file to be
;; formatted
(unless (empty? curr)
(push curr (options [files])))
(let ((output-pair
(if (or (and (not (matches-opt? "-output" prev))
(matches-opt? "-output" curr))
(and (not (matches-opt? "-o" prev))
(matches-opt? "-o" curr)))
;; The "-backup-dir" string is at the end of the arg list
(list curr "")
(if (or (matches-opt? "-o" prev)
(matches-opt? "-output" prev))
(list prev curr)
(list "" ""))))
(indent-size-pair
(if (or (and (not (matches-opt? "-indent-size" prev))
(matches-opt? "-indent-size" curr))
(and (not (matches-opt? "-is" prev))
(matches-opt? "-is" curr)))
;; The "-indent-size" string is at the end of the arg list
(list curr "")
(if (or (matches-opt? "-indent-size" prev)
(matches-opt? "-is" prev))
(list prev curr)
(list "" ""))))
(indent-pair
(if (or (and (not (matches-opt? "-default-indent" prev))
(matches-opt? "-default-indent" curr))
(and (not (matches-opt? "-di" prev))
(matches-opt? "-di" curr)))
;; The "-default-indent" string is at the end of the arg list
(list curr "")
(if (or (matches-opt? "-di" prev)
(matches-opt? "-default-indent" prev))
(list prev curr)
(list "" ""))))
(backup-dir-pair
(if (or (and (not (matches-opt? "-backup-dir" prev))
(matches-opt? "-backup-dir" curr))
(and (not (matches-opt? "-bd" prev))
(matches-opt? "-bd" curr)))
;; The "-backup-dir" string is at the end of the arg list
(list curr "")
(if (or (matches-opt? "-bd" prev)
(matches-opt? "-backup-dir" prev))
(list prev curr)
(list "" ""))))
(dialect-pair
(if (and (not (matches-opt? "-dialect" prev))
(matches-opt? "-dialect" curr))
;; The "-dialect" string is at the end of the arg list
(list curr "")
(if (matches-opt? "-dialect" prev)
(list prev curr)
(list "" ""))))
(suffix-pair
(if (and (not (matches-opt? "-suffix" prev))
(matches-opt? "-suffix" curr))
;; The "-suffix" string is at the end of the arg list
(list curr "")
(if (matches-opt? "-suffix" prev)
(list prev curr)
(list "" ""))))
(tab-width-pair
(if (and (not (matches-opt? "-tab" prev))
(matches-opt? "-tab" curr))
;; The "-tab" string is at the end of the arg list
(list curr "")
(if (matches-opt? "-suffix" prev)
(list prev curr)
(list "" "")))))
(when (not (empty? (indent-size-pair 0)) (empty? (indent-size-pair 1)))
(let ((lst (parse (indent-size-pair 0) "=")))
(if (= 1 (length lst))
;; No characters after the equal sign
(setq (options [indent-size]) (to-int (indent-pair 1) 2))
(setq (options [indent-size]) (to-int
(join (rest lst) "=") 2)))))
(when (not (empty? (tab-width-pair 0)) (empty? (tab-width-pair 1)))
(let ((lst (parse (tab-width-pair 0) "=")))
(if (= 1 (length lst))
;; No characters after the equal sign
(setq (options [tab-width]) (to-int (tab-width-pair 1) -1))
(setq (options [tab-width]) (to-int
(join (rest lst) "=") -1)))))
(when (not (empty? (indent-pair 0)) (empty? (indent-pair 1)))
(let ((lst (parse (indent-pair 0) "=")))
(if (= 1 (length lst))
;; No characters after the equal sign
(setq (options [default-indent]) (to-int (indent-pair 1) 1))
(setq (options [default-indent]) (to-int
(join (rest lst) "=") 1)))))
(when (not (empty? (output-pair 0)) (empty? (output-pair 1)))
(let ((lst (parse (output-pair 0) "=")))
(when (> (length (options [files])) 1)
(write *stderr* "error: Cannot use the -o flag when more than one file is specified")
(exit))
(if (= 1 (length lst))
;; No characters after the equal sign (no output file specified)
(setq (options [output-file]) (output-pair 1))
(setq (options [output-file]) (join (rest lst) "=")))))
(when (not (empty? (suffix-pair 0)) (empty? (suffix-pair 1)))
(let ((lst (parse (suffix-pair 0) "=")))
(if (= 1 (length lst))
;; No characters after the equal sign (no suffix specified)
(setq (options [backup-suffix]) (suffix-pair 1))
(setq (options [backup-suffix]) (join (rest lst) "=")))))
(when (not (empty? (dialect-pair 0)) (empty? (dialect-pair 1)))
(let ((lst (parse (dialect-pair 0) "=")))
(if (= 1 (length lst))
;; No characters after the equal sign (no dialect specified)
(setq (options [dialect]) (dialect-pair 1))
(setq (options [dialect]) (join (rest lst) "=")))))
(when (not (empty? (backup-dir-pair 0)) (empty? (backup-dir-pair 1)))
(letn ((lst (parse (backup-dir-pair 0) "="))
(backup-dir (if (= 1 (length lst))
(setq (options [backup-dir]) (backup-dir-pair 1))
(setq (options [backup-dir]) (join (rest lst) "="))))
(backup-dir (if (= "~" backup-dir)
(env "HOME")
(or (replace
"^~/" backup-dir
(string (env "HOME") "/") 0) backup-dir))))
(setq (options [backup-dir]) backup-dir)))
(cond
((matches-opt? "-nr" curr) (setq (options [read-rc]) nil))
((matches-opt? "-no-rc" curr) (setq (options [read-rc]) nil))
((matches-opt? "-no-output" curr) (setq (options [output]) nil))
((matches-opt? "-nc" curr) (setq (options [compact]) nil))
((matches-opt? "-no-compact" curr) (setq (options [compact]) nil))
((matches-opt? "-nb" curr) (setq (options [backup]) nil))
((matches-opt? "-no-backup" curr) (setq (options [backup]) nil))
((matches-opt? "-nm" curr) (setq (options [modify]) nil))
((matches-opt? "-no-modify" curr) (setq (options [modify]) nil))
((matches-opt? "-uni" curr) (setq (options [uniform]) true))
((matches-opt? "-uniform" curr) (setq (options [uniform]) true))
((matches-opt? "-ic" curr) (setq (options [indent-comments]) true))
((matches-opt? "-indent-comments" curr) (setq (options [indent-comments]) true))
((matches-opt? "-no-warning" curr) (setq (options [warning]) nil))
((matches-opt? "-nw" curr) (setq (options [warning]) nil))
((matches-opt? "-v" curr) (print-version))
((matches-opt? "-version" curr) (print-version))
((matches-opt? "-help" curr) (print-help))
((matches-opt? "-h" curr) (print-help)))
)))
(unless (or (empty? (options [dialect]))
(regex "^(lisp|scheme|newlisp|clojure|all)$"
(options [dialect])))
(write *stderr*
(format "`%s' is not a recognized dialect" (options [dialect])))
(exit))
(when (null? (options [files]))
(setq (options [warning]) nil)
(setq (options [backup]) nil))
options))))
(define (print-args arg)
(let (arg-list (parse-args arg))
(println "backup dir : " (arg-list [backup-dir]))
(println "default indent : " (arg-list [default-indent]))
(println "dialect : " (arg-list [dialect]))
(println "files : " (arg-list [files]))
(println "indent comments : " (arg-list [indent-comments]))
(println "backup : " (arg-list [backup]))
(println "compact : " (arg-list [compact]))
(println "warning : " (arg-list [warning]))
(println "modify : " (arg-list [modify]))
(println "output : " (arg-list [output]))
(println "uniform : " (arg-list [uniform]))
(println "output file : " (arg-list [output-file]))
(println "Indent Size : " (arg-list [indent-size]))
(println "Read rc : " (arg-list [read-rc]))
(println "Backup suffix : " (arg-list [backup-suffix]))
(println "Tab width : " (arg-list [tab-width]))
(println "")))
(define (printf)
(println (format (args 0) (rest (args)))))
(define KEYWORD0 0)
(define KEYWORD1 1)
(define KEYWORD2 2)
(define KEYWORD3 3)
(define KEYWORD4 4)
(define (lookup0 keyword lst)
(letn ((keyword (or keyword ""))
(lst (or lst '()))
(result (lookup keyword lst)))
(or result 0)))
(define (keyword0? keyword assoc-lst)
(= KEYWORD0 (lookup0 keyword assoc-lst)))
(define (keyword1? keyword assoc-lst)
(or (= KEYWORD1 (lookup0 keyword assoc-lst))
(= KEYWORD4 (lookup0 keyword assoc-lst))))
(define (keyword2? keyword assoc-lst)
(= KEYWORD2 (lookup0 keyword assoc-lst)))
(define (keyword3? keyword assoc-lst)
(= KEYWORD3 (lookup0 keyword assoc-lst)))
(define (keyword4? keyword assoc-lst)
(= KEYWORD4 (lookup0 keyword assoc-lst)))
;; ****************************************************************************************
(define *help* (string [text]
usage: yasi [-h] [-nc] [-nb] [-nm] [-nw] [-nr] [--no-output]
[-ne] [-o OUTPUT_FILE] [--tab TAB_SIZE] [--dialect DIALECT] [-v]
[-suffix BACKUP_SUFFIX] [-bd BACKUP_DIR] [-is INDENT_SIZE]
[-di DEFAULT_INDENT] [-ic] [-uni]
[files [files ...]]
Dialect-aware s-expression indenter
positional arguments:
files List of files to be indented. Will indent from
standard input if no files are specified
optional arguments:
-h, --help show this help message and exit
-nc, --no-compact, --nc
Do not compact the code, just indent
-nb, --no-backup, --nb
Do not create a backup file even if --backup-dir is
specified
-nm, --no-modify, --nm
Do not modify the file
-nw, --no-warning, --nw
Do not display warnings
-nr, --no-rc, --nr Ignore any rc files in the current or home folder
--no-output, -no-output
Suppress output of the indented code
-ne, --no-exit, --ne Instructs the program not to exit when a warning is
raised.
-o OUTPUT_FILE Path/name of output file
--tab TAB_SIZE, -tab TAB_SIZE
Indent with tabs using the specified tabwidth. A tab
is assumed equal to 4 spaces by default when expanding
the tabs in the input file
--dialect DIALECT, -dialect DIALECT
Use Scheme keywords
-v, --version Prints script version
-suffix BACKUP_SUFFIX, --suffix BACKUP_SUFFIX
Backup file suffix
-bd BACKUP_DIR, --backup-dir BACKUP_DIR, --bd BACKUP_DIR, -backup-dir BACKUP_DIR
The directory where the backup file is to be written
-is INDENT_SIZE, --indent-size INDENT_SIZE, --is INDENT_SIZE
The number of spaces per indent
-di DEFAULT_INDENT, --default-indent DEFAULT_INDENT, --di DEFAULT_INDENT
The indent level to be used in case a function's
argument is in the next line. Vim uses 2, the most
common being 1.
-ic, --indent-comments, --ic
If true, comment lines will be indented possibly
messing with any deliberate comment layout
-uni, --uniform, -uniform, --uni
Dictates whether the if-clause and else-clause of an
if-likeblock should have the same indent level.
[/text]))
;; ---------------------------------------------------------------------------------
;; GLOBAL CONSTANTS::
(define *stderr* 2)
(define [character] 0)
(define [line-number] 1)
(define [bracket-pos] 2)
(define [indent-level] 3)
(define [func-name] 4)
(define [spaces] 5)
(define *CR* "\r")
(define *LF* "\n")
(define *CRLF* "\r\n")
(define *os-sep* (if (= ostype "Win32") "\\" "/"))
;; Keywords that indent by two spaces
(define *scheme-keywords*
'("define" "local-odd?" "when" "begin" "case" "local-even?" "do"
"call-with-bytevector-output-port" "call-with-input-file" "call-with-port"
"call-with-current-continuation" "open-file-input-port" "call-with-port"
"call-with-values" "call-with-output-file" "call-with-string-output-port"
"define-syntax" "if" "let" "let*" "library" "unless" "lambda" "syntax-rules"
"syntax-case" "let-syntax" "letrec*" "letrec" "let-values" "let*-values"
"with-exception-handler" "with-input-from-file" "with-interrupts-disabled"
"with-input-from-string" "with-output-to-file" "with-input-from-port"
"with-output-to-string" "with-source-path" "with-syntax" "with-implicit"
"with-error-handler" "module" "parameterize"))
(define *clojure-keywords*
'("defn" "fn" "dorun" "doseq" "loop" "when" "let" "defmacro" "binding" "doto"
"ns" ":import" "defstruct" "condp" "defmacro" "comment" "when" "when-let"
"->" "->>" "extend-type" "reify" "binding" "when-not" "proxy" "dotimes"
"try" "finally" "for" "letfn" "catch" "iterate" "while" "with-local-vars"
"locking" "defmulti" "defmethod" "extend"
))
(define *lisp-keywords*
'(":implementation" ":method" "case" "defclass" "defconstant" "defgeneric"
"defimplementation" "define-condition" "define-implementation-package"
"definterface" "defmacro" "defmethod" "defpackage" "defproject" "deftype"
"defun" "defvar" "do-external-symbols" "dolist" "dotimes" "ecase" "etypecase"
"flet" "handler-bind" "if" "lambda" "let" "let*" "print-unreadable-object"
"macrolet" "defparameter" "with-slots" "typecase" "loop" "when" "prog1"
"unless" "with-open-file" "with-output-to-string" "with-input-from-string"
"block" "handler-case" "defstruct" "eval-when" "tagbody" "ignore-errors"
"labels" "multiple-value-bind"
))
(define *newlisp-keywords*
'("while" "if" "case" "dotimes" "define" "dolist" "catch" "throw" "lambda"
"lambda-macro" "when" "unless" "letex" "begin" "dostring" "let" "letn"
"doargs" "define-macro" "until" "do-until" "do-while" "for-all" "for"
))
;; The 'if' and 'else' part of an if block should have different indent levels so
;; that they can stand out since there's no else Keyword in Lisp/Scheme to make
;; this explicit. list IF_LIKE helps us track these keywords.
(define *if-like*
'("if"))
(define (parse-rc-json)
(letn ((fname ".yasirc.json")
(home (env "HOME"))
(path (or (real-path fname)
(real-path (string home *os-sep* fname))""))
(contents (or (read-file path) "")))
(or (json-parse contents) '())))
(define (assign-indent-numbers lst assoc-list inum)
" Builds an associative list with keys as keywords and values as their indentation
numbers. It also merges two associative lists with the values in the second
associative list overridding those in the first
"
(letn ((assoc-list (or assoc-list '()))
(lst (or lst '()))
(inum (or inum KEYWORD0)))
(dolist (arg lst)
(letn ((info (if (and (list? arg) (= 2 (length arg)))
arg
(list arg inum))))
(if (assoc (first info) assoc-list)
(setf (assoc (first info) assoc-list) info)
(push info assoc-list))))
assoc-list))
(define (add-keywords opts)
(set 'dialect (opts [dialect]))
(set 'two-spacers '())
(set 'local-binders '())
(set 'two-armed *if-like*)
(set 'keyword-list '())
(cond
((= "lisp" dialect)
(set 'two-armed
(append *if-like*
'("multiple-value-bind" "destructuring-bind" "do" "do*")))
(extend local-binders '("flet" "labels" "macrolet"))
(set 'two-spacers *lisp-keywords*))
((= dialect "scheme")
(set 'scheme-if-like (append '("with-slots" "do" "do*") *if-like*))
(set 'two-spacers *scheme-keywords*)
(extend local-binders '())
(set 'two-armed *scheme-if-like*))
((= dialect "clojure")
(set 'two-spacers *clojure-keywords*)
(extend local-binders '("letfn"))
(set 'two-armed (append *if-like*)))
((= dialect "newlisp")
(set 'two-spacers *newlisp-keywords*)
(extend local-binders '())
(set 'two-armed (append *if-like*)))
((= dialect "all")
(set 'two-spacers
(append *lisp-keywords* *scheme-keywords*
*clojure-keywords* *newlisp-keywords*))))
(set 'keyword-list (assign-indent-numbers two-spacers keyword-list KEYWORD1))
(set 'keyword-list (assign-indent-numbers two-armed keyword-list KEYWORD2))
(set 'keyword-list (assign-indent-numbers local-binders keyword-list KEYWORD4))
(when (opts [read-rc])
(set 'keyword-list (assign-indent-numbers
(lookup dialect (parse-rc-json)) keyword-list nil)))
keyword-list)
;; ---------------------------------------------------------------------------------
(define (warning warning-message message-format options)
(letn ((opts (parse-args options)))
(when (opts [warning])
(write *stderr* (format warning-message message-format)))))
(define (read-file! filename)
"Exits if the filename provided does not exist"
(if (file? filename)
(read-file filename)
(and (warning "--%s-- Exiting. Filename `%s' is not valid"
;; Exit if the filename is invalid
(list (current-time) filename)) (exit))))
(define (current-time)
"Returns the current local time in mm:ss:ms"
(letn ((curr-time (now))
(minutes (curr-time 4))
(seconds (curr-time 5))
(micro-seconds (curr-time 6))
(west-of-gmt (/ (curr-time 9) 60))
(to-string (lambda (time-val) ;; Add a zero before the digit if it's less than 10
(if (< time-val 10)
(string "0" time-val)
(string time-val)))))
(format "%s:%s:%s" (to-string minutes) (to-string seconds) (slice (to-string micro-seconds) 0 2))))
(define (filename-from-path path)
" Returns the filename by splitting the file path along a slash "
(letn ((lst (parse path *os-sep*)))
(if (null? lst) "" (last lst))))
(define (backup-source-file! filename options)
"Creates a copy of the file to be indented"
(set 'opts (parse-args options))
(set 'backup-dir (opts [backup-dir]))
(unless (file? filename)
(warning "--%s-- Warning: File `%s' does not exist"
(list (current-time) filename) (opts [warning]) true filename))
(unless (directory? backup-dir)
(warning "--%s-- `%s': Warning: Directory `%s' does not exist"
(list (current-time) filename backup-dir) (opts [warning]) true filename))
(let (backup-name (string backup-dir "\\" ;; Change to forward slash in Unix
;; Build the backup file name
(filename-from-path filename) (opts [backup-suffix])))
(copy-file filename backup-name)))
(define (string-trim! str)
" Trim the string making sure there's no whitespace where it's not necessary"
;; Trailing whitespace
(set 'str (replace "[ \t]*$" str "" 0))
;; "(print(++ 1))" ==> "(print (++ 1))"
(set 'str (replace [text]([^\\(\[,{@~`'^#])(\(|\[|{)[/text] str (string $1 " " $2) 0))
;; "(print (++ 1)(-- 1))" ==> "(print (++ 1) (-- 1))"
(set 'str (replace "(\\)|\]|\})(\\[|\\(|\{)" str (string $1 " " $2) 0))
;; "(print 'hello )" ==> "(print 'hello)"
(set 'str (replace "[ \t]*(\\)|\]|})" str $1 0))
;; "(print 'hello )" ==> "(print 'hello )"
(set 'str (replace "[ \t]{2,}" str " " 0))
;; "( (lambda () (print 'yes)))" ==> "((lambda () (print 'yes)))"
(set 'str (replace "(\\()[ \t]*(?=(\\())" str $1 0))
(set 'str (replace "(\\[)[ \t]*(?=(\\[))" str $1 0))
(set 'str (replace "({)[ \t]*(?=({))" str $1 0))
;; "( (lambda () (print 'yes) ) )" ==> "( (lambda () (print 'yes)))"
(set 'str (replace "(\\])[ \t]*(?=(\\)))" str $1 0))
(set 'str (replace "(\\))[ \t]*(?=(\\]))" str $1 0))
(set 'str (replace "(})[ \t]*(?=(}))" str $1 0))
;; Remove leading whitespace
(set 'str (replace "^[ \t]*" str "" 0))
;; " ' ( " ==> " '("
(set 'str (replace "('|`)[ \t]+(\\(|\\[|{)" str (string $1 $2) 0))
str)
(define (rstrip str chars)
" Keeps deleting the last character while that character is in chars "
(while (find (last str) chars)
(setf (last str) ""))
str)
(define (lstrip str chars)
" Like rstrip but from the left. "
(while (find (first str) chars)
(setf (first str) ""))
str)
(define (strip str chars)
(lstrip (rstrip str chars) chars))
(define (split-preserve str sep)
" Split the string into a list but preserve the separator in
every split string in the list without introducing new characters.
"
(let ((str-list (parse str sep))
(map-separator (lambda (separator lst)
(map (lambda (_)
(string _ separator)) lst))))
(if str-list ;; an empty list will raise an error with function 'last'
(if (empty? (last str-list))
(begin
;; restore the separator in the split strings
(set 'str-list (map-separator sep str-list))
;; set the last string to nothing in order to prevent the string from growing
(pop str-list -1)
str-list)
(let (str-list (map-separator sep str-list))
(setf (last str-list) (rstrip (last str-list) sep))
str-list)))))
(define (find-line-ending str)
" Find the line ending of the file by simply testing for existence of
the three possible line endings hoping that the line endings are not mixed
up in the file"
(letn ((CR "\r")
(LF "\n")
(CRLF "\r\n"))
(cond
((find CRLF str) CRLF)
((find CR str) CR)
(true LF))))
(define (is-macro-name? func-name dialect)
" Going to be used to determine whether the form should be indented by two spaces- since
almost all macros do- using the dialect's conventions. "
(and (cond
((null? func-name) nil)
((= dialect "lisp") (regex "^(macro|def|do|with-)" func-name 0))
((= dialect "scheme") (regex "^(call-|def|with-)" func-name 0))
((= dialect "clojure") (regex "^(def|with)" func-name 0))
((= dialect "newlisp") (regex "^(macro|def)" func-name 0)))
true)) ;; Return true if any of the regexes above match
(define (all-whitespace? str)
" Returns true if the line has only whitespace to the end. Such a line
should not be messed with. If you don't want any whitespace to be preserved,
make the function return true for every value"
(and (regex "^[ \t]*(\r|\n|$)" str 0) true))
(define (find-trim-limit str options)
" Returns the maximum index to stop trimming at so that we don't alter the structure
of strings ot comments that might have been layed out in some manner"
(letn ((opts (parse-args options))
(comment-start (regex {([^\\];)|(^;)} str 0)) ;; find first semicolon
(string-start (regex {([^\\]")|(^")} str 0)) ;; find first double quote
(comment-start (if comment-start ;; store -1 if no semicolon is found
(+ (comment-start 2) (comment-start 1))
-1))
(limit (if string-start ;; store -1 if no double quote is found
(+ (string-start 2) (string-start 1))
-1))
(minimum (lambda (lst)
(let (smallest (first lst))
(dolist (arg lst)
(set 'smallest (if (< arg smallest) arg smallest)))))))
(unless (= -1 comment-start)
;; Include all whitespace before the semi colon as part of the comment
(set 'comment-start ((regex "[ \t]*;" str) 1)))
(when (= (opts [dialect]) "newlisp")
(letn ((brace-start (regex "{" str 0))
(tag-start (regex "\\[text\\]" str 0))
(brace-start (if brace-start
(+ (brace-start 2) (brace-start 1))
-1))
(tag-start (if tag-start
(+ (tag-start 2) (tag-start 1))
-1))
(str-positions (list limit (or brace-start -1) (or tag-start -1)))
(pos-lst '()))
(dolist (arg str-positions)
(when (!= -1 arg)
(push arg pos-lst)))
(unless (empty? pos-lst)
(set 'limit (minimum pos-lst)))))
(if (and (!= -1 comment-start) (!= -1 limit))
;; Both a semicolon and a quote have been found
(when (< comment-start limit)
;; The semicolon comes first, meaning the quote is part of the comment
(set 'limit comment-start))
(if (and (!= -1 comment-start) (= -1 limit))
;; A semicolon has been found but no quote
(set 'limit comment-start)
(if (= -1 limit)
;; Make sure -1 is not returned
(set 'limit (length str)))))
limit))
(define (expand-tabs text tab-width)
" Expands tabs. Doesn't work very well when the text has newlines "
(letn ((portions (or (parse text "\t") '("")))
(expanded-text "")
(stop (-- (length portions))))
(for (i 0 stop)
(letn ((piece (portions i))
(len (length piece))
(spaces (- tab-width (% len tab-width))))
(if (= i stop)
(extend expanded-text piece)
(extend expanded-text (string piece (dup " " spaces))))))))
(define (detabify text options)
(letn ((opts (parse-args options)))
(if (< (opts [tab-width]) 1)
(expand-tabs text 4)
(expand-tabs text (opts [tab-width])))))
(define (tabify text options)
(letn ((opts (parse-args options)))
(if (< (opts [tab-width]) 1)
text
(replace (dup " " (opts [tab-width])) text "\t"))))
(define (pad-leading-whitespace str zero-level blist options)
" Indents the correct number of whitespace before the line using the current
indent level and the zero level"
(let ((opts (parse-args options))
(str
(if (opts [compact])
(letn ((comment-start (regex "^[ \t]*;" str 0))
(trim-limit (if (and comment-start (opts [indent-comments]))
(comment-start 2)
(find-trim-limit str opts)))
(substr-1 (slice str 0 trim-limit)) ;; split into two portions
(substr-2 (slice str trim-limit))
(substr-1 (string-trim! substr-1))) ;; strip the first portion
(string substr-1 substr-2)) ;; join the portions
(replace "^[ \t]+" str "" 0))))
(letn ((indent-level (if blist
((first blist) [indent-level])
zero-level))
(padding (dup " " indent-level)))
(list (append (tabify padding opts) str) indent-level))))
(define (indent-line zero-level bracket-list line in-comment? in-symbol-region?
options)
(letn ((opts (parse-args options))
(comment-line (if (opts [indent-comments])
nil
(regex "^[ \t]*;" line 0)))
(leading-spaces (letn ((_line (detabify line opts)))
(regex "^[ \t]+[^; )\n\r]" _line)))
(zero-level
(if (and (not (opts [compact]))
(empty? bracket-list) (zero? in-comment?))
(if leading-spaces
(- (leading-spaces 2) 1)
0)
zero-level)))
(if in-symbol-region?
(list zero-level line 0)
(if (and (not comment-line) (not (all-whitespace? line)))
(push zero-level
(pad-leading-whitespace line zero-level bracket-list opts))
(list zero-level line 0)))))
(define (find-first-arg-pos curr-pos str options)
(let ((leading-spaces 0)
(substr (slice str (+ 1 curr-pos)))
(opts (parse-args options)))
(if (regex "^[ \t]*($|\r)" substr)
(list 1 leading-spaces) ;; Return
(if (and (!= curr-pos (-- (length str))) (= " " (str (+ 1 curr-pos))))
;;; Found space after bracket. We must first find the function position and
;;; then after that the first argument
(letn ((space-regex (regex " +[^)\\]]| \\)" substr))
(leading-spaces (if space-regex
(-- (space-regex 2))
0))
(space-end (if space-regex
(+ (space-regex 1) (space-regex 2))
0))
(arg-pos (regex " +([^)])|( *(\\(|\\[))"
(slice substr space-end))))
(if arg-pos
(set 'arg-pos (-- (+ 1 leading-spaces (+ (arg-pos 1) (arg-pos 2)))))
(set 'arg-pos (+ 1 leading-spaces)))
(letn ((substr-1 (slice substr space-end))
(first-space (or (find " " substr-1) 0)))
(if (regex "^[ \t]*(#\\||;|$|\r)" (slice substr
(+ first-space space-end)))
(list (+ leading-spaces (opts [default-indent])) leading-spaces) ;; Return if comment found
(list arg-pos leading-spaces)))) ;; Return if first argument found
(letn ((space-regex (regex " +([^)}\n\r])|( *(\\(|\\[|{))" substr))
;;; No space after bracket. The first argument is simply after the
;;; first group of whitespace
(first-space (or (find " " substr) -1)))
(if space-regex
(set 'arg-pos (+ (space-regex 1) (space-regex 2)))
(set 'arg-pos 1))
(if (regex "^[\t ]*(;|$|\r)" (slice substr first-space))
(list (+ (opts [default-indent]) leading-spaces) leading-spaces)
(list arg-pos leading-spaces))))))) ;; Return
(define (pop-from-list bracket lst fname line real-pos offset options msg-stack)
(set 'opts (parse-args options))
(if lst
(letn ((popped-list (pop lst))
(popped-bracket (popped-list [character]))
(popped-offset (popped-list [indent-level]))
(line-number (popped-list [line-number]))
(correct-closer
(cond
((= bracket "]") "[")
((= bracket ")") "(")
(true "{"))))
(when (!= popped-bracket correct-closer)
(push (list line-number popped-offset
(format "Bracket `%s' does not match `%s' at (%d, %d)"
popped-bracket bracket line real-pos)) msg-stack)))
(let ()
(push (list line (+ 1 offset)
(format "Unmatched closing bracket `%s'" bracket)) msg-stack)))
(list lst msg-stack))
(define (push-to-list lst func-name bracket line offset first-arg-pos first-item
in-list-literal? leading-spaces options)
(letn ((func-name (or func-name ""))
(position-list (list bracket line offset
(+ first-arg-pos offset) func-name 0))
(opts (parse-args options))
(kwd-list (add-keywords opts))
(two-spacer (or (is-macro-name? func-name (opts [dialect]))
(keyword1? func-name kwd-list))))
(cond
((or in-list-literal? (= bracket "{")
(and (= (opts [dialect]) "clojure") (= bracket "[")))
(setf (position-list [indent-level]) (+ 0 first-item)))
((keyword2? func-name kwd-list)
(setf (position-list [indent-level])
(+ leading-spaces (if (opts [uniform])
(+ offset (opts [indent-size]))
(+ offset (* 2 (opts [indent-size])))))))
((not (empty? func-name))
(cond
(two-spacer (setf (position-list [indent-level]) (+ (opts [indent-size])
leading-spaces offset)))
((keyword3? func-name kwd-list)
(setf (position-list [indent-level]) (+ (* 2 (opts [indent-size]))
leading-spaces offset))))))
(push position-list lst)
(when (>= (length lst) 3)
(letn ((parent-func ((lst 2) [func-name]))
(enclosing-bracket ((lst 1) [character]))
(non-binding-block (and (!= enclosing-bracket "[")
(= (opts [dialect]) "clojure"))))
(when (and (not non-binding-block) (keyword4? parent-func keyword-lst))
(setf ((first lst) [indent-level]) (+ (opts [indent-size]) offset)))))
lst))
(define (indent-code original-code options)
(letn ((opts (parse-args options))
(keyword-lst (add-keywords opts))
(in-comment? 0) ;; Multiline comment
(in-newlisp-string? 0)
(in-newlisp-tag-string? nil)
(in-string? nil)
(in-symbol-with-space? nil)
(last-quote-location '())
(last-symbol-location '())
(first-tag-string '())
(line-number 1)
(newlisp-brace-locations '())
(zero-level 0)
(line-ending (find-line-ending original-code))
(code-lines (split-preserve original-code line-ending))
(indented-code "")
(bracket-locations '())
(comment-locations '())
(message-stack '())
(not-zero? (lambda (val)
(not (zero? val))))
(in-symbol-region? (or in-newlisp-tag-string? in-string? (not-zero? in-comment?) in-symbol-with-space?
(not-zero? in-newlisp-string?))))
(dolist (line code-lines)
(letn ((escaped? nil)
(curr-line line)
(indent-result (indent-line zero-level bracket-locations line in-comment?
in-symbol-region? opts))
(curr-line (indent-result 1))
(indent-level (indent-result 2))
(offset 0))
;; The zero-level can't be placed in the let binding because it's not
;; supposed to be reset for every line.
(setf zero-level (first indent-result))
(set 'indented-code (append indented-code curr-line))
;; Work with spaces instead of tabs as long as possible and then convert
;; them later when indenting the line
(regex "^[ \t]*" curr-line 0)
(set 'new-str (replace "^[ \t]*" curr-line (detabify $0 opts) 0))
(catch ;; Closest thing to a break statement in case we encounter a semi colon
(dostring (chr curr-line)
(letn ((next-char (slice curr-line (+ 1 offset) 1))
(prev-char (if (zero? offset)
;; using slice to get the previous character
;; won't always work.
""
(nth (- offset 1) curr-line)))
(substr (slice curr-line (+ 1 offset)))
(curr-char (char chr))) ;; chr will be an integer. Convert it to a character
(if escaped?
(set 'escaped? nil)
(begin
(when (and (= curr-char "\\") (not in-newlisp-tag-string?)
(zero? in-newlisp-string?))
;; The backslash only escapes when not in raw strings
(set 'escaped? true))
(when (and (or (and (= (opts [dialect]) "newlisp")
(= curr-char "#"))
(= curr-char ";")) (not in-symbol-region?)
(not (and (= "#" prev-char)
(= (opts [dialect]) "scheme"))))
(throw)) ;; Skip to the next line
(when (and (not (find (opts [dialect]) '("clojure" "newlisp")))
(= "|" curr-char) (not in-string?))
;; Take care of multiline comments when the dialect is not
;; Clojure or newLISP
(cond
((and (= "#" prev-char) (not in-symbol-with-space?))
(++ in-comment?)
(push (list line-number offset) comment-locations))
((and (not-zero? in-comment?) (= next-char "#"))
(-- in-comment?)
(pop comment-locations))
((zero? in-comment?)
(if in-symbol-with-space?
(begin
(set 'last-symbol-location '())
(set 'in-symbol-with-space? nil))
(begin
(set 'last-symbol-location (list line-number offset))
(set 'in-symbol-with-space? true))))))
(when (not (or in-symbol-with-space? (not-zero? in-comment?) in-newlisp-tag-string?))
;; Deal with strings here
(when (= "\"" curr-char)
(set 'last-quote-location (list line-number offset))
(set 'in-string? (if (not in-string?)
true
nil)))
(when (and (not in-string?) (= (opts [dialect]) "newlisp"))
(when (= "{" curr-char)
(push (list line-number offset) newlisp-brace-locations)
(++ in-newlisp-string?))
(when (= "}" curr-char)
(if newlisp-brace-locations
(pop newlisp-brace-locations)
(push (list "Attempt to close a non-existent newLISP string"
line-number offset) message-stack))
(-- in-newlisp-string?))))
(when (and (= curr-char "[") (= (opts [dialect]) "newlisp") (zero? in-newlisp-string?) (not in-string?))
;; Deal with newLISP's tag strings here
(when (regex "\\[text\\]" (slice curr-line offset 7))
(set 'in-newlisp-tag-string? true)
(if (not first-tag-string) ;; Keep track of the first [text] tag
(set 'first-tag-string (list line-number offset))))
(when (regex "\\[/text\\]" (slice curr-line offset 7))