| 1 | #t!/usr/bin/env python2
|
| 2 | # Copyright 2016 Andy Chu. All rights reserved.
|
| 3 | # Licensed under the Apache License, Version 2.0 (the "License");
|
| 4 | # you may not use this file except in compliance with the License.
|
| 5 | # You may obtain a copy of the License at
|
| 6 | #
|
| 7 | # http://www.apache.org/licenses/LICENSE-2.0
|
| 8 | """
|
| 9 | util.py - Common infrastructure.
|
| 10 | """
|
| 11 | from __future__ import print_function
|
| 12 |
|
| 13 | from core import ansi
|
| 14 | from core import pyutil
|
| 15 | from mycpp import mylib
|
| 16 |
|
| 17 | import libc
|
| 18 |
|
| 19 | from typing import List, Optional
|
| 20 |
|
| 21 |
|
| 22 | def RegexGroupStrings(s, indices):
|
| 23 | # type: (str, List[int]) -> List[str]
|
| 24 | """
|
| 25 | For BASH_REMATCH: returns empty string for unmatched group
|
| 26 | """
|
| 27 | groups = [] # type: List[str]
|
| 28 | n = len(indices)
|
| 29 | for i in xrange(n / 2):
|
| 30 | start = indices[2 * i]
|
| 31 | end = indices[2 * i + 1]
|
| 32 | if start == -1:
|
| 33 | groups.append('')
|
| 34 | else:
|
| 35 | groups.append(s[start:end])
|
| 36 | return groups
|
| 37 |
|
| 38 |
|
| 39 | def RegexSearch(pat, s):
|
| 40 | # type: (str, str) -> Optional[List[str]]
|
| 41 | """Search a string for pattern.
|
| 42 |
|
| 43 | Return None for no match, or a list of groups that match. Used for some
|
| 44 | runtime parsing.
|
| 45 | """
|
| 46 | indices = libc.regex_search(pat, 0, s, 0)
|
| 47 | if indices is None:
|
| 48 | return None
|
| 49 | return RegexGroupStrings(s, indices)
|
| 50 |
|
| 51 |
|
| 52 | class UserExit(Exception):
|
| 53 | """For explicit 'exit'."""
|
| 54 |
|
| 55 | def __init__(self, status):
|
| 56 | # type: (int) -> None
|
| 57 | self.status = status
|
| 58 |
|
| 59 |
|
| 60 | class HistoryError(Exception):
|
| 61 |
|
| 62 | def __init__(self, msg):
|
| 63 | # type: (str) -> None
|
| 64 | self.msg = msg
|
| 65 |
|
| 66 | def UserErrorString(self):
|
| 67 | # type: () -> str
|
| 68 | return 'history: %s' % self.msg
|
| 69 |
|
| 70 |
|
| 71 | class _DebugFile(object):
|
| 72 |
|
| 73 | def __init__(self):
|
| 74 | # type: () -> None
|
| 75 | pass
|
| 76 |
|
| 77 | def write(self, s):
|
| 78 | # type: (str) -> None
|
| 79 | pass
|
| 80 |
|
| 81 | def writeln(self, s):
|
| 82 | # type: (str) -> None
|
| 83 | pass
|
| 84 |
|
| 85 | def isatty(self):
|
| 86 | # type: () -> bool
|
| 87 | return False
|
| 88 |
|
| 89 |
|
| 90 | class NullDebugFile(_DebugFile):
|
| 91 |
|
| 92 | def __init__(self):
|
| 93 | # type: () -> None
|
| 94 | """Empty constructor for mycpp."""
|
| 95 | _DebugFile.__init__(self)
|
| 96 |
|
| 97 |
|
| 98 | class DebugFile(_DebugFile):
|
| 99 | """Trivial wrapper with writeln() method
|
| 100 |
|
| 101 | Can we turn this into a plain mylib::File? Right now that type only exists
|
| 102 | in C++, but it should probably exist in Python too.
|
| 103 | """
|
| 104 |
|
| 105 | def __init__(self, f):
|
| 106 | # type: (mylib.Writer) -> None
|
| 107 | _DebugFile.__init__(self)
|
| 108 | self.f = f
|
| 109 |
|
| 110 | def write(self, s):
|
| 111 | # type: (str) -> None
|
| 112 | """Used by dev::Tracer and ASDL node.PrettyPrint()."""
|
| 113 | self.f.write(s)
|
| 114 |
|
| 115 | def writeln(self, s):
|
| 116 | # type: (str) -> None
|
| 117 | self.write(s + '\n')
|
| 118 | self.f.flush()
|
| 119 |
|
| 120 | def isatty(self):
|
| 121 | # type: () -> bool
|
| 122 | """Used by node.PrettyPrint()."""
|
| 123 | return self.f.isatty()
|
| 124 |
|
| 125 |
|
| 126 | def PrintTopicHeader(topic_id, f):
|
| 127 | # type: (str, mylib.Writer) -> None
|
| 128 | if f.isatty():
|
| 129 | f.write('%s %s %s\n' % (ansi.REVERSE, topic_id, ansi.RESET))
|
| 130 | else:
|
| 131 | f.write('~~~ %s ~~~\n' % topic_id)
|
| 132 |
|
| 133 | f.write('\n')
|
| 134 |
|
| 135 |
|
| 136 | def PrintEmbeddedHelp(loader, topic_id, f):
|
| 137 | # type: (pyutil._ResourceLoader, str, mylib.Writer) -> bool
|
| 138 | try:
|
| 139 | contents = loader.Get('_devbuild/help/%s' % topic_id)
|
| 140 | except (IOError, OSError):
|
| 141 | return False
|
| 142 |
|
| 143 | PrintTopicHeader(topic_id, f)
|
| 144 | f.write(contents)
|
| 145 | f.write('\n')
|
| 146 | return True # found
|
| 147 |
|
| 148 |
|
| 149 | def _PrintVersionLine(loader, f):
|
| 150 | # type: (pyutil._ResourceLoader, mylib.Writer) -> None
|
| 151 | v = pyutil.GetVersion(loader)
|
| 152 | f.write('Oils %s\t\thttps://www.oilshell.org/\n' % v)
|
| 153 |
|
| 154 |
|
| 155 | def HelpFlag(loader, topic_id, f):
|
| 156 | # type: (pyutil._ResourceLoader, str, mylib.Writer) -> None
|
| 157 | _PrintVersionLine(loader, f)
|
| 158 | f.write('\n')
|
| 159 | found = PrintEmbeddedHelp(loader, topic_id, f)
|
| 160 | # Note: could assert this in C++ too
|
| 161 | assert found, 'Missing %s' % topic_id
|
| 162 |
|
| 163 |
|
| 164 | def VersionFlag(loader, f):
|
| 165 | # type: (pyutil._ResourceLoader, mylib.Writer) -> None
|
| 166 | _PrintVersionLine(loader, f)
|
| 167 | f.write('\n')
|
| 168 | pyutil.PrintVersionDetails(loader)
|