1 | # Copyright 2016 Andy Chu. All rights reserved.
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2 | # Licensed under the Apache License, Version 2.0 (the "License");
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3 | # you may not use this file except in compliance with the License.
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4 | # You may obtain a copy of the License at
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5 | #
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6 | # http://www.apache.org/licenses/LICENSE-2.0
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7 | """
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8 | ui.py - User interface constructs.
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9 | """
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10 | from __future__ import print_function
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11 |
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12 | from _devbuild.gen.id_kind_asdl import Id, Id_t, Id_str
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13 | from _devbuild.gen.syntax_asdl import (
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14 | Token,
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15 | SourceLine,
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16 | loc,
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17 | loc_e,
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18 | loc_t,
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19 | command_t,
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20 | command_str,
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21 | source,
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22 | source_e,
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23 | )
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24 | from _devbuild.gen.value_asdl import (value_t, value_str)
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25 | from asdl import format as fmt
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26 | from data_lang import pretty
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27 | from frontend import lexer
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28 | from frontend import location
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29 | from mycpp import mylib
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30 | from mycpp.mylib import print_stderr, tagswitch, log
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31 | from data_lang import j8_lite
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32 | import libc
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33 |
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34 | from typing import List, Optional, Any, cast, TYPE_CHECKING
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35 | if TYPE_CHECKING:
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36 | from _devbuild.gen import arg_types
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37 | from core import error
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38 | from core.error import _ErrorWithLocation
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39 |
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40 | _ = log
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41 |
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42 |
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43 | def ValType(val):
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44 | # type: (value_t) -> str
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45 | """For displaying type errors in the UI."""
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46 |
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47 | return value_str(val.tag(), dot=False)
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48 |
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49 |
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50 | def CommandType(cmd):
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51 | # type: (command_t) -> str
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52 | """For displaying commands in the UI."""
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53 |
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54 | # Displays 'command.Simple' for now, maybe change it.
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55 | return command_str(cmd.tag())
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56 |
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57 |
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58 | def PrettyId(id_):
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59 | # type: (Id_t) -> str
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60 | """For displaying type errors in the UI."""
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61 |
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62 | # Displays 'Id.BoolUnary_v' for now
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63 | return Id_str(id_)
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64 |
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65 |
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66 | def PrettyToken(tok):
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67 | # type: (Token) -> str
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68 | """Returns a readable token value for the user.
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69 |
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70 | For syntax errors.
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71 | """
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72 | if tok.id == Id.Eof_Real:
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73 | return 'EOF'
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74 |
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75 | val = tok.line.content[tok.col:tok.col + tok.length]
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76 | # TODO: Print length 0 as 'EOF'?
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77 | return repr(val)
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78 |
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79 |
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80 | def PrettyDir(dir_name, home_dir):
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81 | # type: (str, Optional[str]) -> str
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82 | """Maybe replace the home dir with ~.
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83 |
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84 | Used by the 'dirs' builtin and the prompt evaluator.
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85 | """
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86 | if home_dir is not None:
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87 | if dir_name == home_dir or dir_name.startswith(home_dir + '/'):
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88 | return '~' + dir_name[len(home_dir):]
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89 |
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90 | return dir_name
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91 |
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92 |
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93 | def _PrintCodeExcerpt(line, col, length, f):
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94 | # type: (str, int, int, mylib.Writer) -> None
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95 |
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96 | buf = mylib.BufWriter()
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97 |
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98 | buf.write(' ')
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99 |
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100 | # TODO: Be smart about horizontal space when printing code snippet
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101 | # - Accept max_width param, which is terminal width or perhaps 100
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102 | # when there's no terminal
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103 | # - If 'length' of token is greater than max_width, then perhaps print 10
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104 | # chars on each side
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105 | # - If len(line) is less than max_width, then print everything normally
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106 | # - If len(line) is greater than max_width, then print up to max_width
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107 | # but make sure to include the entire token, with some context
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108 | # Print > < or ... to show truncation
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109 | #
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110 | # ^col 80 ^~~~~ error
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111 |
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112 | buf.write(line.rstrip())
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113 |
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114 | buf.write('\n ')
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115 | # preserve tabs
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116 | for c in line[:col]:
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117 | buf.write('\t' if c == '\t' else ' ')
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118 | buf.write('^')
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119 | buf.write('~' * (length - 1))
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120 | buf.write('\n')
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121 |
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122 | # Do this all in a single write() call so it's less likely to be
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123 | # interleaved. See test/runtime-errors.sh errexit_multiple_processes
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124 | f.write(buf.getvalue())
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125 |
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126 |
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127 | def _PrintTokenTooLong(loc_tok, f):
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128 | # type: (loc.TokenTooLong, mylib.Writer) -> None
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129 | line = loc_tok.line
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130 | col = loc_tok.col
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131 |
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132 | buf = mylib.BufWriter()
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133 |
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134 | buf.write(' ')
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135 | # Only print 10 characters, since it's probably very long
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136 | buf.write(line.content[:col + 10].rstrip())
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137 | buf.write('\n ')
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138 |
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139 | # preserve tabs, like _PrintCodeExcerpt
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140 | for c in line.content[:col]:
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141 | buf.write('\t' if c == '\t' else ' ')
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142 |
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143 | buf.write('^\n')
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144 |
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145 | source_str = GetLineSourceString(loc_tok.line, quote_filename=True)
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146 | buf.write(
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147 | '%s:%d: Token starting at column %d is too long: %d bytes (%s)\n' %
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148 | (source_str, line.line_num, loc_tok.col, loc_tok.length,
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149 | Id_str(loc_tok.id)))
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150 |
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151 | # single write() call
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152 | f.write(buf.getvalue())
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153 |
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154 |
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155 | def GetLineSourceString(line, quote_filename=False):
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156 | # type: (SourceLine, bool) -> str
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157 | """Returns a human-readable string for dev tools.
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158 |
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159 | This function is RECURSIVE because there may be dynamic parsing.
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160 | """
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161 | src = line.src
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162 | UP_src = src
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163 |
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164 | with tagswitch(src) as case:
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165 | if case(source_e.Interactive):
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166 | s = '[ interactive ]' # This might need some changes
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167 | elif case(source_e.Headless):
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168 | s = '[ headless ]'
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169 | elif case(source_e.CFlag):
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170 | s = '[ -c flag ]'
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171 | elif case(source_e.Stdin):
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172 | src = cast(source.Stdin, UP_src)
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173 | s = '[ stdin%s ]' % src.comment
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174 |
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175 | elif case(source_e.MainFile):
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176 | src = cast(source.MainFile, UP_src)
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177 | # This will quote a file called '[ -c flag ]' to disambiguate it!
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178 | # also handles characters that are unprintable in a terminal.
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179 | s = src.path
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180 | if quote_filename:
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181 | s = j8_lite.EncodeString(s, unquoted_ok=True)
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182 | elif case(source_e.SourcedFile):
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183 | src = cast(source.SourcedFile, UP_src)
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184 | # ditto
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185 | s = src.path
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186 | if quote_filename:
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187 | s = j8_lite.EncodeString(s, unquoted_ok=True)
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188 |
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189 | elif case(source_e.ArgvWord):
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190 | src = cast(source.ArgvWord, UP_src)
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191 |
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192 | # Note: _PrintWithLocation() uses this more specifically
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193 |
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194 | # TODO: check loc.Missing; otherwise get Token from loc_t, then line
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195 | blame_tok = location.TokenFor(src.location)
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196 | if blame_tok is None:
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197 | s = '[ %s word at ? ]' % src.what
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198 | else:
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199 | line = blame_tok.line
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200 | line_num = line.line_num
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201 | outer_source = GetLineSourceString(
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202 | line, quote_filename=quote_filename)
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203 | s = '[ %s word at line %d of %s ]' % (src.what, line_num,
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204 | outer_source)
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205 |
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206 | elif case(source_e.Variable):
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207 | src = cast(source.Variable, UP_src)
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208 |
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209 | if src.var_name is None:
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210 | var_name = '?'
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211 | else:
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212 | var_name = repr(src.var_name)
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213 |
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214 | if src.location.tag() == loc_e.Missing:
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215 | where = '?'
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216 | else:
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217 | blame_tok = location.TokenFor(src.location)
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218 | assert blame_tok is not None
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219 | line_num = blame_tok.line.line_num
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220 | outer_source = GetLineSourceString(
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221 | blame_tok.line, quote_filename=quote_filename)
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222 | where = 'line %d of %s' % (line_num, outer_source)
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223 |
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224 | s = '[ var %s at %s ]' % (var_name, where)
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225 |
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226 | elif case(source_e.VarRef):
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227 | src = cast(source.VarRef, UP_src)
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228 |
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229 | orig_tok = src.orig_tok
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230 | line_num = orig_tok.line.line_num
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231 | outer_source = GetLineSourceString(orig_tok.line,
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232 | quote_filename=quote_filename)
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233 | where = 'line %d of %s' % (line_num, outer_source)
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234 |
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235 | var_name = lexer.TokenVal(orig_tok)
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236 | s = '[ contents of var %r at %s ]' % (var_name, where)
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237 |
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238 | elif case(source_e.Alias):
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239 | src = cast(source.Alias, UP_src)
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240 | s = '[ expansion of alias %r ]' % src.argv0
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241 |
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242 | elif case(source_e.Reparsed):
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243 | src = cast(source.Reparsed, UP_src)
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244 | span2 = src.left_token
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245 | outer_source = GetLineSourceString(span2.line,
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246 | quote_filename=quote_filename)
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247 | s = '[ %s in %s ]' % (src.what, outer_source)
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248 |
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249 | elif case(source_e.Synthetic):
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250 | src = cast(source.Synthetic, UP_src)
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251 | s = '-- %s' % src.s # use -- to say it came from a flag
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252 |
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253 | else:
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254 | raise AssertionError(src)
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255 |
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256 | return s
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257 |
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258 |
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259 | def _PrintWithLocation(prefix, msg, blame_loc, show_code):
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260 | # type: (str, str, loc_t, bool) -> None
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261 | """Should we have multiple error formats:
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262 |
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263 | - single line and verbose?
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264 | - and turn on "stack" tracing? For 'source' and more?
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265 | """
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266 | f = mylib.Stderr()
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267 | if blame_loc.tag() == loc_e.TokenTooLong:
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268 | _PrintTokenTooLong(cast(loc.TokenTooLong, blame_loc), f)
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269 | return
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270 |
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271 | blame_tok = location.TokenFor(blame_loc)
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272 | if blame_tok is None: # When does this happen?
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273 | f.write('[??? no location ???] %s%s\n' % (prefix, msg))
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274 | return
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275 |
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276 | orig_col = blame_tok.col
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277 | src = blame_tok.line.src
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278 | line = blame_tok.line.content
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279 | line_num = blame_tok.line.line_num # overwritten by source__LValue case
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280 |
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281 | if show_code:
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282 | UP_src = src
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283 |
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284 | with tagswitch(src) as case:
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285 | if case(source_e.Reparsed):
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286 | # Special case for LValue/backticks
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287 |
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288 | # We want the excerpt to look like this:
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289 | # a[x+]=1
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290 | # ^
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291 | # Rather than quoting the internal buffer:
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292 | # x+
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293 | # ^
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294 |
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295 | # Show errors:
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296 | # test/parse-errors.sh text-arith-context
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297 |
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298 | src = cast(source.Reparsed, UP_src)
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299 | tok2 = src.left_token
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300 | line_num = tok2.line.line_num
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301 |
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302 | line2 = tok2.line.content
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303 | lbracket_col = tok2.col + tok2.length
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304 | # NOTE: The inner line number is always 1 because of reparsing.
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305 | # We overwrite it with the original token.
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306 | _PrintCodeExcerpt(line2, orig_col + lbracket_col, 1, f)
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307 |
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308 | elif case(source_e.ArgvWord):
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309 | src = cast(source.ArgvWord, UP_src)
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310 | # Special case for eval, unset, printf -v, etc.
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311 |
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312 | # Show errors:
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313 | # test/runtime-errors.sh test-assoc-array
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314 |
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315 | #print('OUTER blame_loc', blame_loc)
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316 | #print('OUTER tok', blame_tok)
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317 | #print('INNER src.location', src.location)
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318 |
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319 | # Print code and location for MOST SPECIFIC location
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320 | _PrintCodeExcerpt(line, blame_tok.col, blame_tok.length, f)
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321 | source_str = GetLineSourceString(blame_tok.line,
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322 | quote_filename=True)
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323 | f.write('%s:%d\n' % (source_str, line_num))
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324 | f.write('\n')
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325 |
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326 | # Now print OUTER location, with error message
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327 | _PrintWithLocation(prefix, msg, src.location, show_code)
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328 | return
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329 |
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330 | else:
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331 | _PrintCodeExcerpt(line, blame_tok.col, blame_tok.length, f)
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332 |
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333 | source_str = GetLineSourceString(blame_tok.line, quote_filename=True)
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334 |
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335 | # TODO: If the line is blank, it would be nice to print the last non-blank
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336 | # line too?
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337 | f.write('%s:%d: %s%s\n' % (source_str, line_num, prefix, msg))
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338 |
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339 |
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340 | class ctx_Location(object):
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341 |
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342 | def __init__(self, errfmt, location):
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343 | # type: (ErrorFormatter, loc_t) -> None
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344 | errfmt.loc_stack.append(location)
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345 | self.errfmt = errfmt
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346 |
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347 | def __enter__(self):
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348 | # type: () -> None
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349 | pass
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350 |
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351 | def __exit__(self, type, value, traceback):
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352 | # type: (Any, Any, Any) -> None
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353 | self.errfmt.loc_stack.pop()
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354 |
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355 |
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356 | # TODO:
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357 | # - ColorErrorFormatter
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358 | # - BareErrorFormatter? Could just display the foo.sh:37:8: and not quotation.
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359 | #
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360 | # Are these controlled by a flag? It's sort of like --comp-ui. Maybe
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361 | # --error-ui.
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362 |
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363 |
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364 | class ErrorFormatter(object):
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365 | """Print errors with code excerpts.
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366 |
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367 | Philosophy:
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368 | - There should be zero or one code quotation when a shell exits non-zero.
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369 | Showing the same line twice is noisy.
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370 | - When running parallel processes, avoid interleaving multi-line code
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371 | quotations. (TODO: turn off in child processes?)
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372 | """
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373 |
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374 | def __init__(self):
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375 | # type: () -> None
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376 | self.loc_stack = [] # type: List[loc_t]
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377 | self.one_line_errexit = False # root process
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378 |
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379 | def OneLineErrExit(self):
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380 | # type: () -> None
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381 | """Unused now.
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382 |
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383 | For SubprogramThunk.
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384 | """
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385 | self.one_line_errexit = True
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386 |
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387 | # A stack used for the current builtin. A fallback for UsageError.
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388 | # TODO: Should we have PushBuiltinName? Then we can have a consistent style
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389 | # like foo.sh:1: (compopt) Not currently executing.
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390 | def _FallbackLocation(self, blame_loc):
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391 | # type: (Optional[loc_t]) -> loc_t
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392 | if blame_loc is None or blame_loc.tag() == loc_e.Missing:
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393 | if len(self.loc_stack):
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394 | return self.loc_stack[-1]
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395 | return loc.Missing
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396 |
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397 | return blame_loc
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398 |
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399 | def PrefixPrint(self, msg, prefix, blame_loc):
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400 | # type: (str, str, loc_t) -> None
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401 | """Print a hard-coded message with a prefix, and quote code."""
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402 | _PrintWithLocation(prefix,
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403 | msg,
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404 | self._FallbackLocation(blame_loc),
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405 | show_code=True)
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406 |
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407 | def Print_(self, msg, blame_loc=None):
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408 | # type: (str, loc_t) -> None
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409 | """Print message and quote code."""
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410 | _PrintWithLocation('',
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411 | msg,
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412 | self._FallbackLocation(blame_loc),
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413 | show_code=True)
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414 |
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415 | def PrintMessage(self, msg, blame_loc=None):
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416 | # type: (str, loc_t) -> None
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417 | """Print a message WITHOUT quoting code."""
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418 | _PrintWithLocation('',
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419 | msg,
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420 | self._FallbackLocation(blame_loc),
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421 | show_code=False)
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422 |
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423 | def StderrLine(self, msg):
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424 | # type: (str) -> None
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425 | """Just print to stderr."""
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426 | print_stderr(msg)
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427 |
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428 | def PrettyPrintError(self, err, prefix=''):
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429 | # type: (_ErrorWithLocation, str) -> None
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430 | """Print an exception that was caught, with a code quotation.
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431 |
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432 | Unlike other methods, this doesn't use the GetLocationForLine()
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433 | fallback. That only applies to builtins; instead we check
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434 | e.HasLocation() at a higher level, in CommandEvaluator.
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435 | """
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436 | # TODO: Should there be a special span_id of 0 for EOF? runtime.NO_SPID
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437 | # means there is no location info, but 0 could mean that the location is EOF.
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438 | # So then you query the arena for the last line in that case?
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439 | # Eof_Real is the ONLY token with 0 span, because it's invisible!
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440 | # Well Eol_Tok is a sentinel with span_id == runtime.NO_SPID. I think that
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441 | # is OK.
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442 | # Problem: the column for Eof could be useful.
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443 |
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444 | _PrintWithLocation(prefix, err.UserErrorString(), err.location, True)
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445 |
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446 | def PrintErrExit(self, err, pid):
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447 | # type: (error.ErrExit, int) -> None
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448 |
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449 | # TODO:
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450 | # - Don't quote code if you already quoted something on the same line?
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451 | # - _PrintWithLocation calculates the line_id. So you need to remember that?
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452 | # - return it here?
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453 | prefix = 'errexit PID %d: ' % pid
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454 | _PrintWithLocation(prefix, err.UserErrorString(), err.location,
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455 | err.show_code)
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456 |
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457 |
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458 | def PrintAst(node, flag):
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459 | # type: (command_t, arg_types.main) -> None
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460 |
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461 | if flag.ast_format == 'none':
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462 | print_stderr('AST not printed.')
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463 | if 0:
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464 | from _devbuild.gen.id_kind_asdl import Id_str
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465 | from frontend.lexer import ID_HIST, LAZY_ID_HIST
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466 |
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467 | print(LAZY_ID_HIST)
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468 | print(len(LAZY_ID_HIST))
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469 |
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470 | for id_, count in ID_HIST.most_common(10):
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471 | print('%8d %s' % (count, Id_str(id_)))
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472 | print()
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473 | total = sum(ID_HIST.values())
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474 | uniq = len(ID_HIST)
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475 | print('%8d total tokens' % total)
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476 | print('%8d unique tokens IDs' % uniq)
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477 | print()
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478 |
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479 | for id_, count in LAZY_ID_HIST.most_common(10):
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480 | print('%8d %s' % (count, Id_str(id_)))
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481 | print()
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482 | total = sum(LAZY_ID_HIST.values())
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483 | uniq = len(LAZY_ID_HIST)
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484 | print('%8d total tokens' % total)
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485 | print('%8d tokens with LazyVal()' % total)
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486 | print('%8d unique tokens IDs' % uniq)
|
487 | print()
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488 |
|
489 | if 0:
|
490 | from osh.word_parse import WORD_HIST
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491 | #print(WORD_HIST)
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492 | for desc, count in WORD_HIST.most_common(20):
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493 | print('%8d %s' % (count, desc))
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494 |
|
495 | else: # text output
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496 | f = mylib.Stdout()
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497 |
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498 | afmt = flag.ast_format # note: mycpp rewrite to avoid 'in'
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499 | if afmt in ('text', 'abbrev-text'):
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500 | ast_f = fmt.DetectConsoleOutput(f)
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501 | elif afmt in ('html', 'abbrev-html'):
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502 | ast_f = fmt.HtmlOutput(f)
|
503 | else:
|
504 | raise AssertionError()
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505 |
|
506 | if 'abbrev-' in afmt:
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507 | # ASDL "abbreviations" are only supported by asdl/gen_python.py
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508 | if mylib.PYTHON:
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509 | tree = node.AbbreviatedTree()
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510 | else:
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511 | tree = node.PrettyTree()
|
512 | else:
|
513 | tree = node.PrettyTree()
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514 |
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515 | ast_f.FileHeader()
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516 | fmt.PrintTree(tree, ast_f)
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517 | ast_f.FileFooter()
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518 | ast_f.write('\n')
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519 |
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520 |
|
521 | def PrettyPrintValue(val, f):
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522 | # type: (value_t, mylib.Writer) -> None
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523 | """For the = keyword"""
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524 |
|
525 | printer = pretty.PrettyPrinter()
|
526 | printer.SetUseStyles(f.isatty())
|
527 | try:
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528 | width = libc.get_terminal_width()
|
529 | if width > 0:
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530 | printer.SetMaxWidth(width)
|
531 | except (IOError, OSError):
|
532 | pass
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533 |
|
534 | buf = mylib.BufWriter()
|
535 | printer.PrintValue(val, buf)
|
536 | f.write(buf.getvalue())
|
537 | f.write('\n')
|