Mercurial > libervia-backend
annotate sat/tools/utils.py @ 3849:bc24ce903835
plugin XEP-0060: handle priority in `addManagedNode`:
Priority lets order the callback list when an event is received. This is important in some
use case, notably when a plugin needs to check the former item before it is deleted from
cache or updated.
rel 370
author | Goffi <goffi@goffi.org> |
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date | Thu, 14 Jul 2022 12:55:30 +0200 |
parents | 0a87cae85746 |
children | e417c478b488 |
rev | line source |
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3028 | 1 #!/usr/bin/env python3 |
3137 | 2 |
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3 # SaT: an XMPP client |
3479 | 4 # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org) |
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5 |
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6 # This program is free software: you can redistribute it and/or modify |
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7 # it under the terms of the GNU Affero General Public License as published by |
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8 # the Free Software Foundation, either version 3 of the License, or |
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9 # (at your option) any later version. |
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10 |
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11 # This program is distributed in the hope that it will be useful, |
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12 # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 # GNU Affero General Public License for more details. |
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15 |
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16 # You should have received a copy of the GNU Affero General Public License |
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17 # along with this program. If not, see <http://www.gnu.org/licenses/>. |
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18 |
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19 """ various useful methods """ |
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20 |
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21 import unicodedata |
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22 import os.path |
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23 import datetime |
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24 import subprocess |
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25 import time |
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26 import sys |
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27 import random |
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28 import inspect |
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29 import textwrap |
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30 import functools |
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31 import asyncio |
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32 from twisted.python import procutils, failure |
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33 from twisted.internet import defer |
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34 from sat.core.constants import Const as C |
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35 from sat.core.log import getLogger |
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36 |
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37 log = getLogger(__name__) |
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38 |
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39 |
3028 | 40 NO_REPOS_DATA = "repository data unknown" |
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41 repos_cache_dict = None |
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42 repos_cache = None |
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43 |
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44 |
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45 def clean_ustr(ustr): |
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46 """Clean unicode string |
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47 |
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48 remove special characters from unicode string |
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49 """ |
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50 |
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51 def valid_chars(unicode_source): |
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52 for char in unicode_source: |
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53 if unicodedata.category(char) == "Cc" and char != "\n": |
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54 continue |
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55 yield char |
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56 |
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57 return "".join(valid_chars(ustr)) |
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58 |
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59 |
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60 def logError(failure_): |
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61 """Genertic errback which log the error as a warning, and re-raise it""" |
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62 log.warning(failure_.value) |
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63 raise failure_ |
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64 |
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65 |
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66 def partial(func, *fixed_args, **fixed_kwargs): |
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67 # FIXME: temporary hack to workaround the fact that inspect.getargspec is not working with functools.partial |
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68 # making partial unusable with current D-bus module (in addMethod). |
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69 # Should not be needed anywore once moved to Python 3 |
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70 |
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71 ori_args = inspect.getargspec(func).args |
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72 func = functools.partial(func, *fixed_args, **fixed_kwargs) |
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73 if ori_args[0] == "self": |
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74 del ori_args[0] |
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75 ori_args = ori_args[len(fixed_args) :] |
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76 for kw in fixed_kwargs: |
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77 ori_args.remove(kw) |
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78 |
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79 exec( |
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80 textwrap.dedent( |
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81 """\ |
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82 def method({args}): |
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83 return func({kw_args}) |
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84 """ |
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85 ).format( |
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86 args=", ".join(ori_args), kw_args=", ".join([a + "=" + a for a in ori_args]) |
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87 ), |
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88 locals(), |
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89 ) |
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90 |
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91 return method |
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92 |
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93 |
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94 def asDeferred(func, *args, **kwargs): |
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95 """Call a method and return a Deferred |
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96 |
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97 the method can be a simple callable, a Deferred or a coroutine. |
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98 It is similar to defer.maybeDeferred, but also handles coroutines |
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99 """ |
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100 try: |
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101 ret = func(*args, **kwargs) |
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102 except Exception as e: |
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103 return defer.fail(failure.Failure(e)) |
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104 else: |
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105 if asyncio.iscoroutine(ret): |
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106 return defer.ensureDeferred(ret) |
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107 elif isinstance(ret, defer.Deferred): |
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108 return ret |
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109 elif isinstance(ret, failure.Failure): |
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110 return defer.fail(ret) |
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111 else: |
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112 return defer.succeed(ret) |
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113 |
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114 |
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115 def aio(func): |
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116 """Decorator to return a Deferred from asyncio coroutine |
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117 |
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118 Functions with this decorator are run in asyncio context |
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119 """ |
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120 def wrapper(*args, **kwargs): |
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121 return defer.Deferred.fromFuture(asyncio.ensure_future(func(*args, **kwargs))) |
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122 return wrapper |
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123 |
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124 |
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125 def as_future(d): |
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126 return d.asFuture(asyncio.get_event_loop()) |
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127 |
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128 |
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129 def ensure_deferred(func): |
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130 """Decorator to apply ensureDeferred to a function |
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131 |
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132 to be used when the function is called by third party library (e.g. wokkel) |
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133 Otherwise, it's better to use ensureDeferred as early as possible. |
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134 """ |
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135 def wrapper(*args, **kwargs): |
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136 return defer.ensureDeferred(func(*args, **kwargs)) |
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137 return wrapper |
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138 |
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139 |
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140 def xmpp_date(timestamp=None, with_time=True): |
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141 """Return date according to XEP-0082 specification |
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142 |
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143 to avoid reveling the timezone, we always return UTC dates |
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144 the string returned by this method is valid with RFC 3339 |
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145 @param timestamp(None, float): posix timestamp. If None current time will be used |
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146 @param with_time(bool): if True include the time |
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147 @return(unicode): XEP-0082 formatted date and time |
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148 """ |
3028 | 149 template_date = "%Y-%m-%d" |
150 template_time = "%H:%M:%SZ" | |
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151 template = ( |
3028 | 152 "{}T{}".format(template_date, template_time) if with_time else template_date |
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153 ) |
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154 return datetime.datetime.utcfromtimestamp( |
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155 time.time() if timestamp is None else timestamp |
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156 ).strftime(template) |
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157 |
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158 |
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159 def generatePassword(vocabulary=None, size=20): |
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160 """Generate a password with random characters. |
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161 |
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162 @param vocabulary(iterable): characters to use to create password |
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163 @param size(int): number of characters in the password to generate |
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164 @return (unicode): generated password |
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165 """ |
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166 random.seed() |
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167 if vocabulary is None: |
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168 vocabulary = [ |
3028 | 169 chr(i) for i in list(range(0x30, 0x3A)) + list(range(0x41, 0x5B)) + list(range(0x61, 0x7B)) |
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170 ] |
3028 | 171 return "".join([random.choice(vocabulary) for i in range(15)]) |
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172 |
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173 |
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174 def getRepositoryData(module, as_string=True, is_path=False): |
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175 """Retrieve info on current mecurial repository |
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176 |
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177 Data is gotten by using the following methods, in order: |
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178 - using "hg" executable |
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179 - looking for a .hg/dirstate in parent directory of module (or in module/.hg if |
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180 is_path is True), and parse dirstate file to get revision |
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181 - checking package version, which should have repository data when we are on a dev version |
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182 @param module(unicode): module to look for (e.g. sat, libervia) |
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183 module can be a path if is_path is True (see below) |
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184 @param as_string(bool): if True return a string, else return a dictionary |
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185 @param is_path(bool): if True "module" is not handled as a module name, but as an |
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186 absolute path to the parent of a ".hg" directory |
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187 @return (unicode, dictionary): retrieved info in a nice string, |
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188 or a dictionary with retrieved data (key is not present if data is not found), |
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189 key can be: |
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190 - node: full revision number (40 bits) |
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191 - branch: branch name |
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192 - date: ISO 8601 format date |
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193 - tag: latest tag used in hierarchie |
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194 - distance: number of commits since the last tag |
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195 """ |
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196 global repos_cache_dict |
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197 if as_string: |
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198 global repos_cache |
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199 if repos_cache is not None: |
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200 return repos_cache |
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201 else: |
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202 if repos_cache_dict is not None: |
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203 return repos_cache_dict |
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204 |
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205 if sys.platform == "android": |
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206 # FIXME: workaround to avoid trouble on android, need to be fixed properly |
3028 | 207 repos_cache = "Cagou android build" |
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208 return repos_cache |
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209 |
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210 KEYS = ("node", "node_short", "branch", "date", "tag", "distance") |
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211 ori_cwd = os.getcwd() |
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212 |
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213 if is_path: |
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214 repos_root = os.path.abspath(module) |
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215 else: |
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216 repos_root = os.path.abspath(os.path.dirname(module.__file__)) |
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217 |
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218 try: |
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219 hg_path = procutils.which("hg")[0] |
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220 except IndexError: |
3028 | 221 log.warning("Can't find hg executable") |
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222 hg_path = None |
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223 hg_data = {} |
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224 |
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225 if hg_path is not None: |
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226 os.chdir(repos_root) |
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227 try: |
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228 hg_data_raw = subprocess.check_output( |
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229 [ |
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230 "python3", |
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231 hg_path, |
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232 "log", |
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233 "-r", |
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234 "-1", |
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235 "--template", |
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236 "{node}\n" |
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237 "{node|short}\n" |
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238 "{branch}\n" |
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239 "{date|isodate}\n" |
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240 "{latesttag}\n" |
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241 "{latesttagdistance}", |
3028 | 242 ], |
243 text=True | |
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244 ) |
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245 except subprocess.CalledProcessError as e: |
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246 log.error(f"Can't get repository data: {e}") |
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247 hg_data = {} |
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248 except Exception as e: |
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249 log.error(f"Unexpected error, can't get repository data : [{type(e)}] {e}") |
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250 hg_data = {} |
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251 else: |
3028 | 252 hg_data = dict(list(zip(KEYS, hg_data_raw.split("\n")))) |
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253 try: |
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254 hg_data["modified"] = "+" in subprocess.check_output(["python3", hg_path, "id", "-i"], text=True) |
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255 except subprocess.CalledProcessError: |
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256 pass |
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257 else: |
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258 hg_data = {} |
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259 |
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260 if not hg_data: |
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261 # .hg/dirstate method |
3028 | 262 log.debug("trying dirstate method") |
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263 if is_path: |
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264 os.chdir(repos_root) |
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265 else: |
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266 os.chdir(os.path.abspath(os.path.dirname(repos_root))) |
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267 try: |
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268 with open(".hg/dirstate", 'rb') as hg_dirstate: |
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269 hg_data["node"] = hg_dirstate.read(20).hex() |
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270 hg_data["node_short"] = hg_data["node"][:12] |
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271 except IOError: |
3028 | 272 log.debug("Can't access repository data") |
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273 |
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274 # we restore original working dir |
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275 os.chdir(ori_cwd) |
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276 |
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277 if not hg_data: |
3028 | 278 log.debug("Mercurial not available or working, trying package version") |
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279 try: |
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280 import pkg_resources |
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281 except ImportError: |
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282 log.warning("pkg_resources not available, can't get package data") |
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283 else: |
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284 try: |
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285 pkg_version = pkg_resources.get_distribution(C.APP_NAME_FILE).version |
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286 version, local_id = pkg_version.split("+", 1) |
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287 except pkg_resources.DistributionNotFound: |
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288 log.warning("can't retrieve package data") |
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289 except ValueError: |
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290 log.info( |
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291 "no local version id in package: {pkg_version}".format( |
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292 pkg_version=pkg_version |
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293 ) |
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294 ) |
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295 else: |
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296 version = version.replace(".dev0", "D") |
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297 if version != C.APP_VERSION: |
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298 log.warning( |
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299 "Incompatible version ({version}) and pkg_version ({pkg_version})" |
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300 .format( |
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301 version=C.APP_VERSION, pkg_version=pkg_version |
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302 ) |
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303 ) |
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304 else: |
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305 try: |
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306 hg_node, hg_distance = local_id.split(".") |
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307 except ValueError: |
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308 log.warning("Version doesn't specify repository data") |
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309 hg_data = {"node_short": hg_node, "distance": hg_distance} |
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310 |
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311 repos_cache_dict = hg_data |
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312 |
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313 if as_string: |
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314 if not hg_data: |
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315 repos_cache = NO_REPOS_DATA |
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316 else: |
3028 | 317 strings = ["rev", hg_data["node_short"]] |
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318 try: |
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319 if hg_data["modified"]: |
3028 | 320 strings.append("[M]") |
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321 except KeyError: |
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322 pass |
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323 try: |
3028 | 324 strings.extend(["({branch} {date})".format(**hg_data)]) |
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325 except KeyError: |
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326 pass |
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327 try: |
3028 | 328 strings.extend(["+{distance}".format(**hg_data)]) |
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329 except KeyError: |
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330 pass |
3028 | 331 repos_cache = " ".join(strings) |
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332 return repos_cache |
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333 else: |
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334 return hg_data |