all repos — min @ cef9bb37ffc3523ea704a06ff47355da67285a59

A small but practical concatenative programming language.

min.nim

 1
 2
 3
 4
 5
 6
 7
 8
 9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114
 115
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125
 126
 127
 128
 129
 130
 131
 132
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142
 143
 144
 145
 146
 147
 148
 149
 150
 151
 152
 153
 154
 155
 156
 157
 158
 159
 160
 161
 162
 163
 164
 165
 166
 167
 168
 169
 170
 171
 172
 173
 174
 175
 176
 177
 178
 179
 180
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190
 191
 192
 193
 194
 195
 196
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207
 208
 209
 210
 211
 212
 213
 214
 215
 216
 217
 218
 219
 220
 221
 222
 223
 224
 225
 226
 227
 228
 229
 230
 231
 232
 233
 234
 235
 236
 237
 238
 239
 240
 241
 242
 243
 244
 245
 246
 247
 248
 249
 250
 251
 252
 253
 254
 255
 256
 257
 258
 259
 260
 261
 262
 263
 264
 265
 266
 267
 268
 269
 270
 271
 272
 273
 274
 275
 276
 277
 278
 279
 280
 281
 282
 283
 284
 285
 286
 287
 288
 289
 290
 291
 292
 293
 294
 295
 296
 297
 298
 299
 300
 301
 302
 303
 304
 305
 306
 307
 308
 309
 310
 311
 312
 313
 314
 315
 316
 317
 318
 319
 320
 321
 322
 323
 324
 325
 326
 327
 328
 329
 330
 331
 332
 333
 334
 335
 336
 337
 338
 339
 340
 341
 342
 343
 344
 345
 346
 347
 348
 349
 350
 351
 352
 353
 354
 355
 356
 357
 358
 359
 360
 361
 362
 363
 364
 365
 366
 367
 368
 369
 370
 371
 372
 373
 374
 375
 376
 377
 378
 379
 380
 381
when not defined(windows):
  {.passL: "-rdynamic".}
import 
  streams, 
  critbits, 
  parseopt, 
  strutils, 
  os, 
  json, 
  sequtils,
  algorithm,
  logging,
  dynlib

import 
  packages/nimline/nimline,
  packages/niftylogger,
  core/env,
  core/consts,
  core/parser, 
  core/value, 
  core/scope,
  core/interpreter, 
  core/utils
import 
  lib/min_lang, 
  lib/min_stack, 
  lib/min_seq, 
  lib/min_dict, 
  lib/min_num,
  lib/min_str,
  lib/min_logic,
  lib/min_time, 
  lib/min_io,
  lib/min_sys,
  lib/min_fs

when not defined(lite):
  import lib/min_http
  import lib/min_net
  import lib/min_crypto
  import lib/min_math

export 
  parser,
  interpreter,
  utils,
  niftylogger,
  value,
  scope,
  min_lang

const PRELUDE* = "prelude.min".slurp.strip

if logging.getHandlers().len == 0:
  newNiftyLogger().addHandler()

proc getExecs(): seq[string] =
  var res = newSeq[string](0)
  let getFiles = proc(dir: string) =
    for c, s in walkDir(dir, true):
      if (c == pcFile or c == pcLinkToFile) and not res.contains(s):
        res.add s
  getFiles(getCurrentDir())
  for dir in "PATH".getEnv.split(PathSep):
    getFiles(dir)
  res.sort(system.cmp)
  return res

proc getCompletions(ed: LineEditor, symbols: seq[string]): seq[string] =
  var words = ed.lineText.split(" ")
  var word: string
  if words.len == 0:
    word = ed.lineText
  else:
    word = words[words.len-1]
  if word.startsWith("’"):
    return symbols.mapIt("’" & $it)
  elif word.startsWith("~"):
    return symbols.mapIt("~" & $it)
  if word.startsWith("@"):
    return symbols.mapIt("@" & $it)
  if word.startsWith("#"):
    return symbols.mapIt("#" & $it)
  if word.startsWith(">"):
    return symbols.mapIt(">" & $it)
  if word.startsWith("*"):
    return symbols.mapIt("*" & $it)
  if word.startsWith("("):
    return symbols.mapIt("(" & $it)
  if word.startsWith("<"):
    return toSeq(MINSYMBOLS.readFile.parseJson.pairs).mapIt("<" & $it[0])
  if word.startsWith("$"):
    return toSeq(envPairs()).mapIt("$" & $it[0])
  if word.startsWith("!"):
    return getExecs().mapIt("!" & $it)
  if word.startsWith("&"):
    return getExecs().mapIt("&" & $it)
  if word.startsWith("\""):
    var f = word[1..^1]
    if f == "":
      f = getCurrentDir().replace("\\", "/")  
      return toSeq(walkDir(f, true)).mapIt("\"$1" % it.path.replace("\\", "/"))
    elif f.dirExists:
      f = f.replace("\\", "/")
      if f[f.len-1] != '/':
        f = f & "/"
      return toSeq(walkDir(f, true)).mapIt("\"$1$2" % [f, it.path.replace("\\", "/")])
    else:
      var dir: string
      if f.contains("/") or dir.contains("\\"):
        dir = f.parentDir
        let file = f.extractFileName
        return toSeq(walkDir(dir, true)).filterIt(it.path.toLowerAscii.startsWith(file.toLowerAscii)).mapIt("\"$1/$2" % [dir, it.path.replace("\\", "/")])
      else:
        dir = getCurrentDir()
        return toSeq(walkDir(dir, true)).filterIt(it.path.toLowerAscii.startsWith(f.toLowerAscii)).mapIt("\"$1" % [it.path.replace("\\", "/")])
  return symbols

proc stdLib*(i: In) =
  if not MINSYMBOLS.fileExists:
    MINSYMBOLS.writeFile("{}")
  if not MINHISTORY.fileExists:
    MINHISTORY.writeFile("")
  if not MINRC.fileExists:
    MINRC.writeFile("")
  i.lang_module
  i.stack_module
  i.seq_module
  i.dict_module
  i.io_module
  i.logic_module
  i.num_module
  i.str_module
  i.sys_module
  i.time_module
  i.fs_module
  when not defined(lite):
    i.crypto_module
    i.net_module
    i.math_module
    i.http_module
  i.eval PRELUDE, "<prelude>"
  i.eval MINRC.readFile()

type
  LibProc = proc(i: In) {.nimcall.}

proc dynLib*(i: In) =
  discard MINLIBS.existsOrCreateDir
  for library in walkFiles(MINLIBS & "/*"):
    var modname = library.splitFile.name
    var libfile = library.splitFile.name & library.splitFile.ext
    if modname.len > 3 and modname[0..2] == "lib":
      modname = modname[3..modname.len-1]
    let dll = library.loadLib()
    if dll != nil:
      let modsym = dll.symAddr(modname)
      if modsym != nil:
        let modproc = cast[LibProc](dll.symAddr(modname))
        i.modproc()
        info("[$1] Dynamic module loaded successfully: $2" % [libfile, modname])
      else:
        warn("[$1] Library does not contain symbol $2" % [libfile, modname])
    else:
      warn("Unable to load dynamic library: " & libfile)

proc interpret*(i: In, s: Stream) =
  i.stdLib()
  i.dynLib()
  i.open(s, i.filename)
  discard i.parser.getToken() 
  try:
    i.interpret()
  except:
    discard
  i.close()

proc interpret*(i: In, s: string): MinValue = 
  i.open(newStringStream(s), i.filename)
  discard i.parser.getToken() 
  try:
    result = i.interpret()
  except:
    discard
    i.close()

proc minStream(s: Stream, filename: string) = 
  var i = newMinInterpreter(filename = filename)
  i.pwd = filename.parentDir
  i.interpret(s)

proc minString*(buffer: string) =
  minStream(newStringStream(buffer), "input")

proc minFile*(filename: string) =
  var fileLines = newSeq[string](0)
  var contents = ""
  try:
    fileLines = filename.readFile().splitLines()
  except:
    fatal("Cannot read from file: " & filename)
    quit(3)

  if fileLines[0].len >= 2 and fileLines[0][0..1] == "#!":
    contents = fileLines[1..fileLines.len-1].join("\n")
  else:
    contents = fileLines.join("\n")
  minStream(newStringStream(contents), filename)

proc minFile*(file: File, filename="stdin") =
  var stream = newFileStream(stdin)
  if stream == nil:
    fatal("Cannot read from file: " & filename)
    quit(3)
  minStream(stream, filename)

proc printResult(i: In, res: MinValue) =
  if res.isNil:
    return
  if i.stack.len > 0:
    let n = $i.stack.len
    if res.isQuotation and res.qVal.len > 1:
      echo "{$1} -> (" % n
      for item in res.qVal:
        echo  "         " & $item
      echo " ".repeat(n.len) & "      )"
    elif res.isDictionary and res.dVal.len > 1:
      echo "{$1} -> {" % n
      for item in res.dVal.pairs:
        var v = ""
        if item.val.kind == minProcOp:
          v = "<native>"
        else:
          v = $item.val.val
        echo  "         " & v & " :" & $item.key
      if res.objType == "":
        echo " ".repeat(n.len) & "      }"
      else:
        echo " ".repeat(n.len) & "        ;" & res.objType
        echo " ".repeat(n.len) & "      }"
    else:
      echo "[$1] -> $2" % [$i.stack.len, $i.stack[i.stack.len - 1]]

proc minRepl*(i: var MinInterpreter, simple = false) =
  i.stdLib()
  i.dynLib()
  var s = newStringStream("")
  i.open(s, "<repl>")
  var line: string
  var ed = initEditor(historyFile = MINHISTORY)
  if simple:
    while true:
      i.push("prompt".newSym)
      let vals = i.expect("string")
      let v = vals[0] 
      let prompt = v.getString()
      stdout.write(prompt)
      line = stdin.readLine()
      i.printResult i.interpret($line)
  else:
    while true:
      let symbols = toSeq(i.scope.symbols.keys)
      ed.completionCallback = proc(ed: LineEditor): seq[string] =
        return ed.getCompletions(symbols)
      # evaluate prompt
      i.push("prompt".newSym)
      let vals = i.expect("string")
      let v = vals[0] 
      let prompt = v.getString()
      line = ed.readLine(prompt)
      i.printResult i.interpret($line)

proc minRepl*(simple = false) = 
  var i = newMinInterpreter(filename = "<repl>")
  i.minRepl(simple)
    
when isMainModule:

  var REPL = false
  var SIMPLEREPL = false
  var INSTALL = false
  var UNINSTALL = false
  var libfile = ""

  let usage* = """  $1 v$2 - a tiny concatenative shell and programming language
  (c) 2014-2018 Fabio Cevasco
  
  Usage:
    min [options] [filename]

  Arguments:
    filename  A $1 file to interpret (default: STDIN).
  Options:
    -—install:<lib>           Install dynamic library file <lib>
    —-uninstall:<lib>         Uninstall dynamic library file <lib>
    -l, --log                 Set log level (debug|info|notice|warn|error|fatal)
                              Default: notice
    -e, --evaluate            Evaluate a $1 program inline
    -h, —-help                Print this help
    -v, —-version             Print the program version
    -i, —-interactive         Start $1 shell (with advanced prompt)
    -j, --interactive-simple  Start $1 shell (without advanced prompt)""" % [pkgName, pkgVersion]

  var file, s: string = ""
  var args = newSeq[string](0)
  setLogFilter(lvlNotice)
  
  for kind, key, val in getopt():
    case kind:
      of cmdArgument:
        args.add key
        if file == "":
          file = key 
      of cmdLongOption, cmdShortOption:
        case key:
          of "log", "l":
            if file == "":
              var val = val
              setLogLevel(val)
          of "evaluate", "e":
            if file == "":
              s = val
          of "help", "h":
            if file == "":
              echo usage
              quit(0)
          of "version", "v":
            if file == "":
              echo pkgVersion
              quit(0)
          of "interactive", "i":
            if file == "":
              REPL = true
          of "interactive-simple", "j":
            if file == "":
              SIMPLEREPL = true
          of "install":
            if file == "":
              INSTALL = true
              libfile = val
          of "uninstall":
            if file == "":
              UNINSTALL = true
              libfile = val
          else:
            discard
      else:
        discard
  
  if s != "":
    minString(s)
  elif file != "":
    minFile file
  elif INSTALL:
    if not libfile.existsFile:
      fatal("Dynamic library file not found:" & libfile)
      quit(4)
    try:
      libfile.copyFile(MINLIBS/libfile.extractFilename)
    except:
      fatal("Unable to install library file: " & libfile)
      quit(5)
    notice("Dynamic linbrary installed successfully: " & libfile.extractFilename)
    quit(0)
  elif UNINSTALL:
    if not (MINLIBS/libfile.extractFilename).existsFile:
      fatal("Dynamic library file not found:" & libfile)
      quit(4)
    try:
      removeFile(MINLIBS/libfile.extractFilename)
    except:
      fatal("Unable to uninstall library file: " & libfile)
      quit(6)
    notice("Dynamic linbrary uninstalled successfully: " & libfile.extractFilename)
    quit(0)
  elif REPL or SIMPLEREPL:
    minRepl(SIMPLEREPL)
    quit(0)
  else:
    minFile stdin, "stdin"