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@@ -1,835 +1,853 b'' | |||
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1 | 1 | """ History related magics and functionality """ |
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2 | 2 | #----------------------------------------------------------------------------- |
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3 | 3 | # Copyright (C) 2010 The IPython Development Team. |
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4 | 4 | # |
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5 | 5 | # Distributed under the terms of the BSD License. |
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6 | 6 | # |
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7 | 7 | # The full license is in the file COPYING.txt, distributed with this software. |
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8 | 8 | #----------------------------------------------------------------------------- |
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9 | 9 | |
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10 | 10 | #----------------------------------------------------------------------------- |
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11 | 11 | # Imports |
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12 | 12 | #----------------------------------------------------------------------------- |
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13 | 13 | from __future__ import print_function |
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14 | 14 | |
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15 | 15 | # Stdlib imports |
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16 | 16 | import atexit |
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17 | 17 | import datetime |
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18 | 18 | import os |
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19 | 19 | import re |
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20 | 20 | import sqlite3 |
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21 | 21 | import threading |
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22 | 22 | |
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23 | 23 | # Our own packages |
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24 | 24 | from IPython.config.configurable import Configurable |
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25 | 25 | |
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26 | 26 | from IPython.testing.skipdoctest import skip_doctest |
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27 | 27 | from IPython.utils import io |
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28 | 28 | from IPython.utils.traitlets import Bool, Dict, Instance, Int, CInt, List, Unicode |
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29 | 29 | from IPython.utils.warn import warn |
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30 | 30 | |
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31 | 31 | #----------------------------------------------------------------------------- |
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32 | 32 | # Classes and functions |
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33 | 33 | #----------------------------------------------------------------------------- |
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34 | 34 | |
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35 |
class History |
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|
36 | """A class to organize all history-related functionality in one place. | |
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37 | """ | |
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38 | # Public interface | |
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39 | ||
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40 | # An instance of the IPython shell we are attached to | |
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41 | shell = Instance('IPython.core.interactiveshell.InteractiveShellABC') | |
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42 | # Lists to hold processed and raw history. These start with a blank entry | |
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43 | # so that we can index them starting from 1 | |
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44 | input_hist_parsed = List([""]) | |
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45 | input_hist_raw = List([""]) | |
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46 | # A list of directories visited during session | |
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47 | dir_hist = List() | |
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48 | def _dir_hist_default(self): | |
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49 | try: | |
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50 | return [os.getcwdu()] | |
|
51 | except OSError: | |
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52 | return [] | |
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53 | ||
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54 | # A dict of output history, keyed with ints from the shell's | |
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55 | # execution count. | |
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56 | output_hist = Dict() | |
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57 | # The text/plain repr of outputs. | |
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58 | output_hist_reprs = Dict() | |
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59 | ||
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35 | class HistoryAccessor(Configurable): | |
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36 | """Access the history database without adding to it. For use by standalone | |
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37 | history tools.""" | |
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60 | 38 | # String holding the path to the history file |
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61 | 39 | hist_file = Unicode(config=True) |
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62 | 40 | |
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63 | 41 | # The SQLite database |
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64 | 42 | db = Instance(sqlite3.Connection) |
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65 | # The number of the current session in the history database | |
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66 | session_number = CInt() | |
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67 | # Should we log output to the database? (default no) | |
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68 | db_log_output = Bool(False, config=True) | |
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69 | # Write to database every x commands (higher values save disk access & power) | |
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70 | # Values of 1 or less effectively disable caching. | |
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71 | db_cache_size = Int(0, config=True) | |
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72 | # The input and output caches | |
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73 | db_input_cache = List() | |
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74 | db_output_cache = List() | |
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75 | ||
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76 | # History saving in separate thread | |
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77 | save_thread = Instance('IPython.core.history.HistorySavingThread') | |
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78 | try: # Event is a function returning an instance of _Event... | |
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79 | save_flag = Instance(threading._Event) | |
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80 | except AttributeError: # ...until Python 3.3, when it's a class. | |
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81 | save_flag = Instance(threading.Event) | |
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82 | ||
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83 | # Private interface | |
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84 | # Variables used to store the three last inputs from the user. On each new | |
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85 | # history update, we populate the user's namespace with these, shifted as | |
|
86 | # necessary. | |
|
87 | _i00 = Unicode(u'') | |
|
88 | _i = Unicode(u'') | |
|
89 | _ii = Unicode(u'') | |
|
90 | _iii = Unicode(u'') | |
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91 | ||
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92 | # A regex matching all forms of the exit command, so that we don't store | |
|
93 | # them in the history (it's annoying to rewind the first entry and land on | |
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94 | # an exit call). | |
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95 | _exit_re = re.compile(r"(exit|quit)(\s*\(.*\))?$") | |
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96 | ||
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97 | def __init__(self, shell, config=None, **traits): | |
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98 | """Create a new history manager associated with a shell instance. | |
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43 | ||
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44 | def __init__(self, hist_file=u'', shell=None, config=None, **traits): | |
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45 | """Create a new history accessor. | |
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46 | ||
|
47 | hist_file must be given, either as an argument or through config. | |
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99 | 48 | """ |
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100 | 49 | # We need a pointer back to the shell for various tasks. |
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101 |
super(History |
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102 | **traits) | |
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50 | super(HistoryAccessor, self).__init__(shell=shell, config=config, | |
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51 | hist_file=hist_file, **traits) | |
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103 | 52 | |
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104 | 53 | if self.hist_file == u'': |
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105 | 54 | # No one has set the hist_file, yet. |
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106 | histfname = 'history' | |
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107 | self.hist_file = os.path.join(shell.profile_dir.location, histfname + '.sqlite') | |
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55 | self.hist_file = self._get_hist_file_name(hist_file) | |
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108 | 56 | |
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109 | 57 | try: |
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110 | 58 | self.init_db() |
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111 | 59 | except sqlite3.DatabaseError: |
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112 | 60 | if os.path.isfile(self.hist_file): |
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113 | 61 | # Try to move the file out of the way. |
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114 | 62 | newpath = os.path.join(self.shell.profile_dir.location, "hist-corrupt.sqlite") |
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115 | 63 | os.rename(self.hist_file, newpath) |
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116 | 64 | print("ERROR! History file wasn't a valid SQLite database.", |
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117 | 65 | "It was moved to %s" % newpath, "and a new file created.") |
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118 | 66 | self.init_db() |
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119 | 67 | else: |
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120 | 68 | # The hist_file is probably :memory: or something else. |
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121 | 69 | raise |
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122 | ||
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123 | self.save_flag = threading.Event() | |
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124 | self.db_input_cache_lock = threading.Lock() | |
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125 | self.db_output_cache_lock = threading.Lock() | |
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126 | self.save_thread = HistorySavingThread(self) | |
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127 | self.save_thread.start() | |
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128 | ||
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129 | self.new_session() | |
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130 | ||
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131 | ||
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70 | ||
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71 | def _get_hist_file_name(self, hist_file=None): | |
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72 | "Override to produce a default history file name." | |
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73 | raise NotImplementedError("No default history file") | |
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74 | ||
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132 | 75 | def init_db(self): |
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133 | 76 | """Connect to the database, and create tables if necessary.""" |
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134 | 77 | # use detect_types so that timestamps return datetime objects |
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135 | 78 | self.db = sqlite3.connect(self.hist_file, detect_types=sqlite3.PARSE_DECLTYPES|sqlite3.PARSE_COLNAMES) |
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136 | 79 | self.db.execute("""CREATE TABLE IF NOT EXISTS sessions (session integer |
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137 | 80 | primary key autoincrement, start timestamp, |
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138 | 81 | end timestamp, num_cmds integer, remark text)""") |
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139 | 82 | self.db.execute("""CREATE TABLE IF NOT EXISTS history |
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140 | 83 | (session integer, line integer, source text, source_raw text, |
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141 | 84 | PRIMARY KEY (session, line))""") |
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142 | 85 | # Output history is optional, but ensure the table's there so it can be |
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143 | 86 | # enabled later. |
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144 | 87 | self.db.execute("""CREATE TABLE IF NOT EXISTS output_history |
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145 | 88 | (session integer, line integer, output text, |
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146 | 89 | PRIMARY KEY (session, line))""") |
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147 | 90 | self.db.commit() |
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148 | 91 | |
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149 | def new_session(self, conn=None): | |
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150 | """Get a new session number.""" | |
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151 | if conn is None: | |
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152 | conn = self.db | |
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153 | ||
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154 | with conn: | |
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155 | # N.B. 'insert into' here is lower case because of a bug in the | |
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156 | # sqlite3 module that affects the Turkish locale. This should be | |
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157 | # fixed for Python 2.7.3 and 3.2.3, as well as 3.3 onwards. | |
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158 | # http://bugs.python.org/issue13099 | |
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159 | cur = conn.execute("""insert into sessions VALUES (NULL, ?, NULL, | |
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160 | NULL, "") """, (datetime.datetime.now(),)) | |
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161 | self.session_number = cur.lastrowid | |
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162 | ||
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163 | def end_session(self): | |
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164 | """Close the database session, filling in the end time and line count.""" | |
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165 | self.writeout_cache() | |
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166 | with self.db: | |
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167 | self.db.execute("""UPDATE sessions SET end=?, num_cmds=? WHERE | |
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168 | session==?""", (datetime.datetime.now(), | |
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169 | len(self.input_hist_parsed)-1, self.session_number)) | |
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170 | self.session_number = 0 | |
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171 | ||
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172 | def name_session(self, name): | |
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173 | """Give the current session a name in the history database.""" | |
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174 | with self.db: | |
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175 | self.db.execute("UPDATE sessions SET remark=? WHERE session==?", | |
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176 | (name, self.session_number)) | |
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177 | ||
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178 | def reset(self, new_session=True): | |
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179 | """Clear the session history, releasing all object references, and | |
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180 | optionally open a new session.""" | |
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181 | self.output_hist.clear() | |
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182 | # The directory history can't be completely empty | |
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183 | self.dir_hist[:] = [os.getcwdu()] | |
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184 | ||
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185 | if new_session: | |
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186 | if self.session_number: | |
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187 | self.end_session() | |
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188 | self.input_hist_parsed[:] = [""] | |
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189 | self.input_hist_raw[:] = [""] | |
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190 | self.new_session() | |
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191 | ||
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192 | 92 | ## ------------------------------- |
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193 | 93 | ## Methods for retrieving history: |
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194 | 94 | ## ------------------------------- |
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195 | 95 | def _run_sql(self, sql, params, raw=True, output=False): |
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196 | 96 | """Prepares and runs an SQL query for the history database. |
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197 | 97 | |
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198 | 98 | Parameters |
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199 | 99 | ---------- |
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200 | 100 | sql : str |
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201 | 101 | Any filtering expressions to go after SELECT ... FROM ... |
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202 | 102 | params : tuple |
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203 | 103 | Parameters passed to the SQL query (to replace "?") |
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204 | 104 | raw, output : bool |
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205 | 105 | See :meth:`get_range` |
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206 | 106 | |
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207 | 107 | Returns |
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208 | 108 | ------- |
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209 | 109 | Tuples as :meth:`get_range` |
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210 | 110 | """ |
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211 | 111 | toget = 'source_raw' if raw else 'source' |
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212 | 112 | sqlfrom = "history" |
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213 | 113 | if output: |
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214 | 114 | sqlfrom = "history LEFT JOIN output_history USING (session, line)" |
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215 | 115 | toget = "history.%s, output_history.output" % toget |
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216 | 116 | cur = self.db.execute("SELECT session, line, %s FROM %s " %\ |
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217 | 117 | (toget, sqlfrom) + sql, params) |
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218 | 118 | if output: # Regroup into 3-tuples, and parse JSON |
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219 | 119 | return ((ses, lin, (inp, out)) for ses, lin, inp, out in cur) |
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220 | 120 | return cur |
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221 | 121 | |
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222 | 122 | |
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223 | 123 | def get_session_info(self, session=0): |
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224 | 124 | """get info about a session |
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225 | 125 | |
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226 | 126 | Parameters |
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227 | 127 | ---------- |
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228 | 128 | |
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229 | 129 | session : int |
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230 | 130 | Session number to retrieve. The current session is 0, and negative |
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231 | 131 | numbers count back from current session, so -1 is previous session. |
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232 | 132 | |
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233 | 133 | Returns |
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234 | 134 | ------- |
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235 | 135 | |
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236 | 136 | (session_id [int], start [datetime], end [datetime], num_cmds [int], remark [unicode]) |
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237 | 137 | |
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238 | 138 | Sessions that are running or did not exit cleanly will have `end=None` |
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239 | 139 | and `num_cmds=None`. |
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240 | 140 | |
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241 | 141 | """ |
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242 | 142 | |
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243 | 143 | if session <= 0: |
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244 | 144 | session += self.session_number |
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245 | 145 | |
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246 | 146 | query = "SELECT * from sessions where session == ?" |
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247 | 147 | return self.db.execute(query, (session,)).fetchone() |
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248 | 148 | |
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249 | 149 | |
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250 | 150 | def get_tail(self, n=10, raw=True, output=False, include_latest=False): |
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251 | 151 | """Get the last n lines from the history database. |
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252 | 152 | |
|
253 | 153 | Parameters |
|
254 | 154 | ---------- |
|
255 | 155 | n : int |
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256 | 156 | The number of lines to get |
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257 | 157 | raw, output : bool |
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258 | 158 | See :meth:`get_range` |
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259 | 159 | include_latest : bool |
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260 | 160 | If False (default), n+1 lines are fetched, and the latest one |
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261 | 161 | is discarded. This is intended to be used where the function |
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262 | 162 | is called by a user command, which it should not return. |
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263 | 163 | |
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264 | 164 | Returns |
|
265 | 165 | ------- |
|
266 | 166 | Tuples as :meth:`get_range` |
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267 | 167 | """ |
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268 | 168 | self.writeout_cache() |
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269 | 169 | if not include_latest: |
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270 | 170 | n += 1 |
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271 | 171 | cur = self._run_sql("ORDER BY session DESC, line DESC LIMIT ?", |
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272 | 172 | (n,), raw=raw, output=output) |
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273 | 173 | if not include_latest: |
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274 | 174 | return reversed(list(cur)[1:]) |
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275 | 175 | return reversed(list(cur)) |
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276 | 176 | |
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277 | 177 | def search(self, pattern="*", raw=True, search_raw=True, |
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278 | 178 | output=False): |
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279 | 179 | """Search the database using unix glob-style matching (wildcards |
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280 | 180 | * and ?). |
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281 | 181 | |
|
282 | 182 | Parameters |
|
283 | 183 | ---------- |
|
284 | 184 | pattern : str |
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285 | 185 | The wildcarded pattern to match when searching |
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286 | 186 | search_raw : bool |
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287 | 187 | If True, search the raw input, otherwise, the parsed input |
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288 | 188 | raw, output : bool |
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289 | 189 | See :meth:`get_range` |
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290 | 190 | |
|
291 | 191 | Returns |
|
292 | 192 | ------- |
|
293 | 193 | Tuples as :meth:`get_range` |
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294 | 194 | """ |
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295 | 195 | tosearch = "source_raw" if search_raw else "source" |
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296 | 196 | if output: |
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297 | 197 | tosearch = "history." + tosearch |
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298 | 198 | self.writeout_cache() |
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299 | 199 | return self._run_sql("WHERE %s GLOB ?" % tosearch, (pattern,), |
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300 | 200 | raw=raw, output=output) |
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301 | 201 | |
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302 | def _get_range_session(self, start=1, stop=None, raw=True, output=False): | |
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303 | """Get input and output history from the current session. Called by | |
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304 | get_range, and takes similar parameters.""" | |
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305 | input_hist = self.input_hist_raw if raw else self.input_hist_parsed | |
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306 | ||
|
307 | n = len(input_hist) | |
|
308 | if start < 0: | |
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309 | start += n | |
|
310 | if not stop or (stop > n): | |
|
311 | stop = n | |
|
312 | elif stop < 0: | |
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313 | stop += n | |
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314 | ||
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315 | for i in range(start, stop): | |
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316 | if output: | |
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317 | line = (input_hist[i], self.output_hist_reprs.get(i)) | |
|
318 | else: | |
|
319 | line = input_hist[i] | |
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320 | yield (0, i, line) | |
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321 | ||
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322 | 202 | def get_range(self, session=0, start=1, stop=None, raw=True,output=False): |
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323 | 203 | """Retrieve input by session. |
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324 | 204 | |
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325 | 205 | Parameters |
|
326 | 206 | ---------- |
|
327 | 207 | session : int |
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328 | 208 | Session number to retrieve. The current session is 0, and negative |
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329 | 209 | numbers count back from current session, so -1 is previous session. |
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330 | 210 | start : int |
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331 | 211 | First line to retrieve. |
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332 | 212 | stop : int |
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333 | 213 | End of line range (excluded from output itself). If None, retrieve |
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334 | 214 | to the end of the session. |
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335 | 215 | raw : bool |
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336 | 216 | If True, return untranslated input |
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337 | 217 | output : bool |
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338 | 218 | If True, attempt to include output. This will be 'real' Python |
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339 | 219 | objects for the current session, or text reprs from previous |
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340 | 220 | sessions if db_log_output was enabled at the time. Where no output |
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341 | 221 | is found, None is used. |
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342 | 222 | |
|
343 | 223 | Returns |
|
344 | 224 | ------- |
|
345 | 225 | An iterator over the desired lines. Each line is a 3-tuple, either |
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346 | 226 | (session, line, input) if output is False, or |
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347 | 227 | (session, line, (input, output)) if output is True. |
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348 | 228 | """ |
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349 | 229 | if session == 0 or session==self.session_number: # Current session |
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350 | 230 | return self._get_range_session(start, stop, raw, output) |
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351 | 231 | if session < 0: |
|
352 | 232 | session += self.session_number |
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353 | 233 | |
|
354 | 234 | if stop: |
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355 | 235 | lineclause = "line >= ? AND line < ?" |
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356 | 236 | params = (session, start, stop) |
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357 | 237 | else: |
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358 | 238 | lineclause = "line>=?" |
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359 | 239 | params = (session, start) |
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360 | 240 | |
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361 | 241 | return self._run_sql("WHERE session==? AND %s""" % lineclause, |
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362 | 242 | params, raw=raw, output=output) |
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363 | 243 | |
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364 | 244 | def get_range_by_str(self, rangestr, raw=True, output=False): |
|
365 | 245 | """Get lines of history from a string of ranges, as used by magic |
|
366 | 246 | commands %hist, %save, %macro, etc. |
|
367 | 247 | |
|
368 | 248 | Parameters |
|
369 | 249 | ---------- |
|
370 | 250 | rangestr : str |
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371 | 251 | A string specifying ranges, e.g. "5 ~2/1-4". See |
|
372 | 252 | :func:`magic_history` for full details. |
|
373 | 253 | raw, output : bool |
|
374 | 254 | As :meth:`get_range` |
|
375 | 255 | |
|
376 | 256 | Returns |
|
377 | 257 | ------- |
|
378 | 258 | Tuples as :meth:`get_range` |
|
379 | 259 | """ |
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380 | 260 | for sess, s, e in extract_hist_ranges(rangestr): |
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381 | 261 | for line in self.get_range(sess, s, e, raw=raw, output=output): |
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382 | 262 | yield line |
|
383 | 263 | |
|
264 | ||
|
265 | class HistoryManager(HistoryAccessor): | |
|
266 | """A class to organize all history-related functionality in one place. | |
|
267 | """ | |
|
268 | # Public interface | |
|
269 | ||
|
270 | # An instance of the IPython shell we are attached to | |
|
271 | shell = Instance('IPython.core.interactiveshell.InteractiveShellABC') | |
|
272 | # Lists to hold processed and raw history. These start with a blank entry | |
|
273 | # so that we can index them starting from 1 | |
|
274 | input_hist_parsed = List([""]) | |
|
275 | input_hist_raw = List([""]) | |
|
276 | # A list of directories visited during session | |
|
277 | dir_hist = List() | |
|
278 | def _dir_hist_default(self): | |
|
279 | try: | |
|
280 | return [os.getcwdu()] | |
|
281 | except OSError: | |
|
282 | return [] | |
|
283 | ||
|
284 | # A dict of output history, keyed with ints from the shell's | |
|
285 | # execution count. | |
|
286 | output_hist = Dict() | |
|
287 | # The text/plain repr of outputs. | |
|
288 | output_hist_reprs = Dict() | |
|
289 | ||
|
290 | # The number of the current session in the history database | |
|
291 | session_number = CInt() | |
|
292 | # Should we log output to the database? (default no) | |
|
293 | db_log_output = Bool(False, config=True) | |
|
294 | # Write to database every x commands (higher values save disk access & power) | |
|
295 | # Values of 1 or less effectively disable caching. | |
|
296 | db_cache_size = Int(0, config=True) | |
|
297 | # The input and output caches | |
|
298 | db_input_cache = List() | |
|
299 | db_output_cache = List() | |
|
300 | ||
|
301 | # History saving in separate thread | |
|
302 | save_thread = Instance('IPython.core.history.HistorySavingThread') | |
|
303 | try: # Event is a function returning an instance of _Event... | |
|
304 | save_flag = Instance(threading._Event) | |
|
305 | except AttributeError: # ...until Python 3.3, when it's a class. | |
|
306 | save_flag = Instance(threading.Event) | |
|
307 | ||
|
308 | # Private interface | |
|
309 | # Variables used to store the three last inputs from the user. On each new | |
|
310 | # history update, we populate the user's namespace with these, shifted as | |
|
311 | # necessary. | |
|
312 | _i00 = Unicode(u'') | |
|
313 | _i = Unicode(u'') | |
|
314 | _ii = Unicode(u'') | |
|
315 | _iii = Unicode(u'') | |
|
316 | ||
|
317 | # A regex matching all forms of the exit command, so that we don't store | |
|
318 | # them in the history (it's annoying to rewind the first entry and land on | |
|
319 | # an exit call). | |
|
320 | _exit_re = re.compile(r"(exit|quit)(\s*\(.*\))?$") | |
|
321 | ||
|
322 | def __init__(self, shell=None, config=None, **traits): | |
|
323 | """Create a new history manager associated with a shell instance. | |
|
324 | """ | |
|
325 | # We need a pointer back to the shell for various tasks. | |
|
326 | super(HistoryManager, self).__init__(shell=shell, config=config, | |
|
327 | **traits) | |
|
328 | self.save_flag = threading.Event() | |
|
329 | self.db_input_cache_lock = threading.Lock() | |
|
330 | self.db_output_cache_lock = threading.Lock() | |
|
331 | self.save_thread = HistorySavingThread(self) | |
|
332 | self.save_thread.start() | |
|
333 | ||
|
334 | self.new_session() | |
|
335 | ||
|
336 | def _get_hist_file_name(self, hist_file=None): | |
|
337 | profile_dir = self.shell.profile_dir.location | |
|
338 | return os.path.join(profile_dir, 'history.sqlite') | |
|
339 | ||
|
340 | def new_session(self, conn=None): | |
|
341 | """Get a new session number.""" | |
|
342 | if conn is None: | |
|
343 | conn = self.db | |
|
344 | ||
|
345 | with conn: | |
|
346 | cur = conn.execute("""INSERT INTO sessions VALUES (NULL, ?, NULL, | |
|
347 | NULL, "") """, (datetime.datetime.now(),)) | |
|
348 | self.session_number = cur.lastrowid | |
|
349 | ||
|
350 | def end_session(self): | |
|
351 | """Close the database session, filling in the end time and line count.""" | |
|
352 | self.writeout_cache() | |
|
353 | with self.db: | |
|
354 | self.db.execute("""UPDATE sessions SET end=?, num_cmds=? WHERE | |
|
355 | session==?""", (datetime.datetime.now(), | |
|
356 | len(self.input_hist_parsed)-1, self.session_number)) | |
|
357 | self.session_number = 0 | |
|
358 | ||
|
359 | def name_session(self, name): | |
|
360 | """Give the current session a name in the history database.""" | |
|
361 | with self.db: | |
|
362 | self.db.execute("UPDATE sessions SET remark=? WHERE session==?", | |
|
363 | (name, self.session_number)) | |
|
364 | ||
|
365 | def reset(self, new_session=True): | |
|
366 | """Clear the session history, releasing all object references, and | |
|
367 | optionally open a new session.""" | |
|
368 | self.output_hist.clear() | |
|
369 | # The directory history can't be completely empty | |
|
370 | self.dir_hist[:] = [os.getcwdu()] | |
|
371 | ||
|
372 | if new_session: | |
|
373 | if self.session_number: | |
|
374 | self.end_session() | |
|
375 | self.input_hist_parsed[:] = [""] | |
|
376 | self.input_hist_raw[:] = [""] | |
|
377 | self.new_session() | |
|
378 | ||
|
379 | # ------------------------------ | |
|
380 | # Methods for retrieving history | |
|
381 | # ------------------------------ | |
|
382 | def _get_range_session(self, start=1, stop=None, raw=True, output=False): | |
|
383 | """Get input and output history from the current session. Called by | |
|
384 | get_range, and takes similar parameters.""" | |
|
385 | input_hist = self.input_hist_raw if raw else self.input_hist_parsed | |
|
386 | ||
|
387 | n = len(input_hist) | |
|
388 | if start < 0: | |
|
389 | start += n | |
|
390 | if not stop or (stop > n): | |
|
391 | stop = n | |
|
392 | elif stop < 0: | |
|
393 | stop += n | |
|
394 | ||
|
395 | for i in range(start, stop): | |
|
396 | if output: | |
|
397 | line = (input_hist[i], self.output_hist_reprs.get(i)) | |
|
398 | else: | |
|
399 | line = input_hist[i] | |
|
400 | yield (0, i, line) | |
|
401 | ||
|
384 | 402 | ## ---------------------------- |
|
385 | 403 | ## Methods for storing history: |
|
386 | 404 | ## ---------------------------- |
|
387 | 405 | def store_inputs(self, line_num, source, source_raw=None): |
|
388 | 406 | """Store source and raw input in history and create input cache |
|
389 | 407 | variables _i*. |
|
390 | 408 | |
|
391 | 409 | Parameters |
|
392 | 410 | ---------- |
|
393 | 411 | line_num : int |
|
394 | 412 | The prompt number of this input. |
|
395 | 413 | |
|
396 | 414 | source : str |
|
397 | 415 | Python input. |
|
398 | 416 | |
|
399 | 417 | source_raw : str, optional |
|
400 | 418 | If given, this is the raw input without any IPython transformations |
|
401 | 419 | applied to it. If not given, ``source`` is used. |
|
402 | 420 | """ |
|
403 | 421 | if source_raw is None: |
|
404 | 422 | source_raw = source |
|
405 | 423 | source = source.rstrip('\n') |
|
406 | 424 | source_raw = source_raw.rstrip('\n') |
|
407 | 425 | |
|
408 | 426 | # do not store exit/quit commands |
|
409 | 427 | if self._exit_re.match(source_raw.strip()): |
|
410 | 428 | return |
|
411 | 429 | |
|
412 | 430 | self.input_hist_parsed.append(source) |
|
413 | 431 | self.input_hist_raw.append(source_raw) |
|
414 | 432 | |
|
415 | 433 | with self.db_input_cache_lock: |
|
416 | 434 | self.db_input_cache.append((line_num, source, source_raw)) |
|
417 | 435 | # Trigger to flush cache and write to DB. |
|
418 | 436 | if len(self.db_input_cache) >= self.db_cache_size: |
|
419 | 437 | self.save_flag.set() |
|
420 | 438 | |
|
421 | 439 | # update the auto _i variables |
|
422 | 440 | self._iii = self._ii |
|
423 | 441 | self._ii = self._i |
|
424 | 442 | self._i = self._i00 |
|
425 | 443 | self._i00 = source_raw |
|
426 | 444 | |
|
427 | 445 | # hackish access to user namespace to create _i1,_i2... dynamically |
|
428 | 446 | new_i = '_i%s' % line_num |
|
429 | 447 | to_main = {'_i': self._i, |
|
430 | 448 | '_ii': self._ii, |
|
431 | 449 | '_iii': self._iii, |
|
432 | 450 | new_i : self._i00 } |
|
433 | 451 | self.shell.user_ns.update(to_main) |
|
434 | 452 | |
|
435 | 453 | def store_output(self, line_num): |
|
436 | 454 | """If database output logging is enabled, this saves all the |
|
437 | 455 | outputs from the indicated prompt number to the database. It's |
|
438 | 456 | called by run_cell after code has been executed. |
|
439 | 457 | |
|
440 | 458 | Parameters |
|
441 | 459 | ---------- |
|
442 | 460 | line_num : int |
|
443 | 461 | The line number from which to save outputs |
|
444 | 462 | """ |
|
445 | 463 | if (not self.db_log_output) or (line_num not in self.output_hist_reprs): |
|
446 | 464 | return |
|
447 | 465 | output = self.output_hist_reprs[line_num] |
|
448 | 466 | |
|
449 | 467 | with self.db_output_cache_lock: |
|
450 | 468 | self.db_output_cache.append((line_num, output)) |
|
451 | 469 | if self.db_cache_size <= 1: |
|
452 | 470 | self.save_flag.set() |
|
453 | 471 | |
|
454 | 472 | def _writeout_input_cache(self, conn): |
|
455 | 473 | with conn: |
|
456 | 474 | for line in self.db_input_cache: |
|
457 | 475 | conn.execute("INSERT INTO history VALUES (?, ?, ?, ?)", |
|
458 | 476 | (self.session_number,)+line) |
|
459 | 477 | |
|
460 | 478 | def _writeout_output_cache(self, conn): |
|
461 | 479 | with conn: |
|
462 | 480 | for line in self.db_output_cache: |
|
463 | 481 | conn.execute("INSERT INTO output_history VALUES (?, ?, ?)", |
|
464 | 482 | (self.session_number,)+line) |
|
465 | 483 | |
|
466 | 484 | def writeout_cache(self, conn=None): |
|
467 | 485 | """Write any entries in the cache to the database.""" |
|
468 | 486 | if conn is None: |
|
469 | 487 | conn = self.db |
|
470 | 488 | |
|
471 | 489 | with self.db_input_cache_lock: |
|
472 | 490 | try: |
|
473 | 491 | self._writeout_input_cache(conn) |
|
474 | 492 | except sqlite3.IntegrityError: |
|
475 | 493 | self.new_session(conn) |
|
476 | 494 | print("ERROR! Session/line number was not unique in", |
|
477 | 495 | "database. History logging moved to new session", |
|
478 | 496 | self.session_number) |
|
479 | 497 | try: # Try writing to the new session. If this fails, don't recurse |
|
480 | 498 | self._writeout_input_cache(conn) |
|
481 | 499 | except sqlite3.IntegrityError: |
|
482 | 500 | pass |
|
483 | 501 | finally: |
|
484 | 502 | self.db_input_cache = [] |
|
485 | 503 | |
|
486 | 504 | with self.db_output_cache_lock: |
|
487 | 505 | try: |
|
488 | 506 | self._writeout_output_cache(conn) |
|
489 | 507 | except sqlite3.IntegrityError: |
|
490 | 508 | print("!! Session/line number for output was not unique", |
|
491 | 509 | "in database. Output will not be stored.") |
|
492 | 510 | finally: |
|
493 | 511 | self.db_output_cache = [] |
|
494 | 512 | |
|
495 | 513 | |
|
496 | 514 | class HistorySavingThread(threading.Thread): |
|
497 | 515 | """This thread takes care of writing history to the database, so that |
|
498 | 516 | the UI isn't held up while that happens. |
|
499 | 517 | |
|
500 | 518 | It waits for the HistoryManager's save_flag to be set, then writes out |
|
501 | 519 | the history cache. The main thread is responsible for setting the flag when |
|
502 | 520 | the cache size reaches a defined threshold.""" |
|
503 | 521 | daemon = True |
|
504 | 522 | stop_now = False |
|
505 | 523 | def __init__(self, history_manager): |
|
506 | 524 | super(HistorySavingThread, self).__init__() |
|
507 | 525 | self.history_manager = history_manager |
|
508 | 526 | atexit.register(self.stop) |
|
509 | 527 | |
|
510 | 528 | def run(self): |
|
511 | 529 | # We need a separate db connection per thread: |
|
512 | 530 | try: |
|
513 | 531 | self.db = sqlite3.connect(self.history_manager.hist_file) |
|
514 | 532 | while True: |
|
515 | 533 | self.history_manager.save_flag.wait() |
|
516 | 534 | if self.stop_now: |
|
517 | 535 | return |
|
518 | 536 | self.history_manager.save_flag.clear() |
|
519 | 537 | self.history_manager.writeout_cache(self.db) |
|
520 | 538 | except Exception as e: |
|
521 | 539 | print(("The history saving thread hit an unexpected error (%s)." |
|
522 | 540 | "History will not be written to the database.") % repr(e)) |
|
523 | 541 | |
|
524 | 542 | def stop(self): |
|
525 | 543 | """This can be called from the main thread to safely stop this thread. |
|
526 | 544 | |
|
527 | 545 | Note that it does not attempt to write out remaining history before |
|
528 | 546 | exiting. That should be done by calling the HistoryManager's |
|
529 | 547 | end_session method.""" |
|
530 | 548 | self.stop_now = True |
|
531 | 549 | self.history_manager.save_flag.set() |
|
532 | 550 | self.join() |
|
533 | 551 | |
|
534 | 552 | |
|
535 | 553 | # To match, e.g. ~5/8-~2/3 |
|
536 | 554 | range_re = re.compile(r""" |
|
537 | 555 | ((?P<startsess>~?\d+)/)? |
|
538 | 556 | (?P<start>\d+) # Only the start line num is compulsory |
|
539 | 557 | ((?P<sep>[\-:]) |
|
540 | 558 | ((?P<endsess>~?\d+)/)? |
|
541 | 559 | (?P<end>\d+))? |
|
542 | 560 | $""", re.VERBOSE) |
|
543 | 561 | |
|
544 | 562 | def extract_hist_ranges(ranges_str): |
|
545 | 563 | """Turn a string of history ranges into 3-tuples of (session, start, stop). |
|
546 | 564 | |
|
547 | 565 | Examples |
|
548 | 566 | -------- |
|
549 | 567 | list(extract_input_ranges("~8/5-~7/4 2")) |
|
550 | 568 | [(-8, 5, None), (-7, 1, 4), (0, 2, 3)] |
|
551 | 569 | """ |
|
552 | 570 | for range_str in ranges_str.split(): |
|
553 | 571 | rmatch = range_re.match(range_str) |
|
554 | 572 | if not rmatch: |
|
555 | 573 | continue |
|
556 | 574 | start = int(rmatch.group("start")) |
|
557 | 575 | end = rmatch.group("end") |
|
558 | 576 | end = int(end) if end else start+1 # If no end specified, get (a, a+1) |
|
559 | 577 | if rmatch.group("sep") == "-": # 1-3 == 1:4 --> [1, 2, 3] |
|
560 | 578 | end += 1 |
|
561 | 579 | startsess = rmatch.group("startsess") or "0" |
|
562 | 580 | endsess = rmatch.group("endsess") or startsess |
|
563 | 581 | startsess = int(startsess.replace("~","-")) |
|
564 | 582 | endsess = int(endsess.replace("~","-")) |
|
565 | 583 | assert endsess >= startsess |
|
566 | 584 | |
|
567 | 585 | if endsess == startsess: |
|
568 | 586 | yield (startsess, start, end) |
|
569 | 587 | continue |
|
570 | 588 | # Multiple sessions in one range: |
|
571 | 589 | yield (startsess, start, None) |
|
572 | 590 | for sess in range(startsess+1, endsess): |
|
573 | 591 | yield (sess, 1, None) |
|
574 | 592 | yield (endsess, 1, end) |
|
575 | 593 | |
|
576 | 594 | def _format_lineno(session, line): |
|
577 | 595 | """Helper function to format line numbers properly.""" |
|
578 | 596 | if session == 0: |
|
579 | 597 | return str(line) |
|
580 | 598 | return "%s#%s" % (session, line) |
|
581 | 599 | |
|
582 | 600 | @skip_doctest |
|
583 | 601 | def magic_history(self, parameter_s = ''): |
|
584 | 602 | """Print input history (_i<n> variables), with most recent last. |
|
585 | 603 | |
|
586 | 604 | %history -> print at most 40 inputs (some may be multi-line)\\ |
|
587 | 605 | %history n -> print at most n inputs\\ |
|
588 | 606 | %history n1 n2 -> print inputs between n1 and n2 (n2 not included)\\ |
|
589 | 607 | |
|
590 | 608 | By default, input history is printed without line numbers so it can be |
|
591 | 609 | directly pasted into an editor. Use -n to show them. |
|
592 | 610 | |
|
593 | 611 | Ranges of history can be indicated using the syntax: |
|
594 | 612 | 4 : Line 4, current session |
|
595 | 613 | 4-6 : Lines 4-6, current session |
|
596 | 614 | 243/1-5: Lines 1-5, session 243 |
|
597 | 615 | ~2/7 : Line 7, session 2 before current |
|
598 | 616 | ~8/1-~6/5 : From the first line of 8 sessions ago, to the fifth line |
|
599 | 617 | of 6 sessions ago. |
|
600 | 618 | Multiple ranges can be entered, separated by spaces |
|
601 | 619 | |
|
602 | 620 | The same syntax is used by %macro, %save, %edit, %rerun |
|
603 | 621 | |
|
604 | 622 | Options: |
|
605 | 623 | |
|
606 | 624 | -n: print line numbers for each input. |
|
607 | 625 | This feature is only available if numbered prompts are in use. |
|
608 | 626 | |
|
609 | 627 | -o: also print outputs for each input. |
|
610 | 628 | |
|
611 | 629 | -p: print classic '>>>' python prompts before each input. This is useful |
|
612 | 630 | for making documentation, and in conjunction with -o, for producing |
|
613 | 631 | doctest-ready output. |
|
614 | 632 | |
|
615 | 633 | -r: (default) print the 'raw' history, i.e. the actual commands you typed. |
|
616 | 634 | |
|
617 | 635 | -t: print the 'translated' history, as IPython understands it. IPython |
|
618 | 636 | filters your input and converts it all into valid Python source before |
|
619 | 637 | executing it (things like magics or aliases are turned into function |
|
620 | 638 | calls, for example). With this option, you'll see the native history |
|
621 | 639 | instead of the user-entered version: '%cd /' will be seen as |
|
622 | 640 | 'get_ipython().magic("%cd /")' instead of '%cd /'. |
|
623 | 641 | |
|
624 | 642 | -g: treat the arg as a pattern to grep for in (full) history. |
|
625 | 643 | This includes the saved history (almost all commands ever written). |
|
626 | 644 | Use '%hist -g' to show full saved history (may be very long). |
|
627 | 645 | |
|
628 | 646 | -l: get the last n lines from all sessions. Specify n as a single arg, or |
|
629 | 647 | the default is the last 10 lines. |
|
630 | 648 | |
|
631 | 649 | -f FILENAME: instead of printing the output to the screen, redirect it to |
|
632 | 650 | the given file. The file is always overwritten, though IPython asks for |
|
633 | 651 | confirmation first if it already exists. |
|
634 | 652 | |
|
635 | 653 | Examples |
|
636 | 654 | -------- |
|
637 | 655 | :: |
|
638 | 656 | |
|
639 | 657 | In [6]: %hist -n 4 6 |
|
640 | 658 | 4:a = 12 |
|
641 | 659 | 5:print a**2 |
|
642 | 660 | |
|
643 | 661 | """ |
|
644 | 662 | |
|
645 | 663 | if not self.shell.displayhook.do_full_cache: |
|
646 | 664 | print('This feature is only available if numbered prompts are in use.') |
|
647 | 665 | return |
|
648 | 666 | opts,args = self.parse_options(parameter_s,'noprtglf:',mode='string') |
|
649 | 667 | |
|
650 | 668 | # For brevity |
|
651 | 669 | history_manager = self.shell.history_manager |
|
652 | 670 | |
|
653 | 671 | def _format_lineno(session, line): |
|
654 | 672 | """Helper function to format line numbers properly.""" |
|
655 | 673 | if session in (0, history_manager.session_number): |
|
656 | 674 | return str(line) |
|
657 | 675 | return "%s/%s" % (session, line) |
|
658 | 676 | |
|
659 | 677 | # Check if output to specific file was requested. |
|
660 | 678 | try: |
|
661 | 679 | outfname = opts['f'] |
|
662 | 680 | except KeyError: |
|
663 | 681 | outfile = io.stdout # default |
|
664 | 682 | # We don't want to close stdout at the end! |
|
665 | 683 | close_at_end = False |
|
666 | 684 | else: |
|
667 | 685 | if os.path.exists(outfname): |
|
668 | 686 | if not io.ask_yes_no("File %r exists. Overwrite?" % outfname): |
|
669 | 687 | print('Aborting.') |
|
670 | 688 | return |
|
671 | 689 | |
|
672 | 690 | outfile = open(outfname,'w') |
|
673 | 691 | close_at_end = True |
|
674 | 692 | |
|
675 | 693 | print_nums = 'n' in opts |
|
676 | 694 | get_output = 'o' in opts |
|
677 | 695 | pyprompts = 'p' in opts |
|
678 | 696 | # Raw history is the default |
|
679 | 697 | raw = not('t' in opts) |
|
680 | 698 | |
|
681 | 699 | default_length = 40 |
|
682 | 700 | pattern = None |
|
683 | 701 | |
|
684 | 702 | if 'g' in opts: # Glob search |
|
685 | 703 | pattern = "*" + args + "*" if args else "*" |
|
686 | 704 | hist = history_manager.search(pattern, raw=raw, output=get_output) |
|
687 | 705 | print_nums = True |
|
688 | 706 | elif 'l' in opts: # Get 'tail' |
|
689 | 707 | try: |
|
690 | 708 | n = int(args) |
|
691 | 709 | except ValueError, IndexError: |
|
692 | 710 | n = 10 |
|
693 | 711 | hist = history_manager.get_tail(n, raw=raw, output=get_output) |
|
694 | 712 | else: |
|
695 | 713 | if args: # Get history by ranges |
|
696 | 714 | hist = history_manager.get_range_by_str(args, raw, get_output) |
|
697 | 715 | else: # Just get history for the current session |
|
698 | 716 | hist = history_manager.get_range(raw=raw, output=get_output) |
|
699 | 717 | |
|
700 | 718 | # We could be displaying the entire history, so let's not try to pull it |
|
701 | 719 | # into a list in memory. Anything that needs more space will just misalign. |
|
702 | 720 | width = 4 |
|
703 | 721 | |
|
704 | 722 | for session, lineno, inline in hist: |
|
705 | 723 | # Print user history with tabs expanded to 4 spaces. The GUI clients |
|
706 | 724 | # use hard tabs for easier usability in auto-indented code, but we want |
|
707 | 725 | # to produce PEP-8 compliant history for safe pasting into an editor. |
|
708 | 726 | if get_output: |
|
709 | 727 | inline, output = inline |
|
710 | 728 | inline = inline.expandtabs(4).rstrip() |
|
711 | 729 | |
|
712 | 730 | multiline = "\n" in inline |
|
713 | 731 | line_sep = '\n' if multiline else ' ' |
|
714 | 732 | if print_nums: |
|
715 | 733 | print('%s:%s' % (_format_lineno(session, lineno).rjust(width), |
|
716 | 734 | line_sep), file=outfile, end='') |
|
717 | 735 | if pyprompts: |
|
718 | 736 | print(">>> ", end="", file=outfile) |
|
719 | 737 | if multiline: |
|
720 | 738 | inline = "\n... ".join(inline.splitlines()) + "\n..." |
|
721 | 739 | print(inline, file=outfile) |
|
722 | 740 | if get_output and output: |
|
723 | 741 | print(output, file=outfile) |
|
724 | 742 | |
|
725 | 743 | if close_at_end: |
|
726 | 744 | outfile.close() |
|
727 | 745 | |
|
728 | 746 | |
|
729 | 747 | def magic_rep(self, arg): |
|
730 | 748 | r"""Repeat a command, or get command to input line for editing. %recall and |
|
731 | 749 | %rep are equivalent. |
|
732 | 750 | |
|
733 | 751 | - %recall (no arguments): |
|
734 | 752 | |
|
735 | 753 | Place a string version of last computation result (stored in the special '_' |
|
736 | 754 | variable) to the next input prompt. Allows you to create elaborate command |
|
737 | 755 | lines without using copy-paste:: |
|
738 | 756 | |
|
739 | 757 | In[1]: l = ["hei", "vaan"] |
|
740 | 758 | In[2]: "".join(l) |
|
741 | 759 | Out[2]: heivaan |
|
742 | 760 | In[3]: %rep |
|
743 | 761 | In[4]: heivaan_ <== cursor blinking |
|
744 | 762 | |
|
745 | 763 | %recall 45 |
|
746 | 764 | |
|
747 | 765 | Place history line 45 on the next input prompt. Use %hist to find |
|
748 | 766 | out the number. |
|
749 | 767 | |
|
750 | 768 | %recall 1-4 |
|
751 | 769 | |
|
752 | 770 | Combine the specified lines into one cell, and place it on the next |
|
753 | 771 | input prompt. See %history for the slice syntax. |
|
754 | 772 | |
|
755 | 773 | %recall foo+bar |
|
756 | 774 | |
|
757 | 775 | If foo+bar can be evaluated in the user namespace, the result is |
|
758 | 776 | placed at the next input prompt. Otherwise, the history is searched |
|
759 | 777 | for lines which contain that substring, and the most recent one is |
|
760 | 778 | placed at the next input prompt. |
|
761 | 779 | """ |
|
762 | 780 | if not arg: # Last output |
|
763 | 781 | self.set_next_input(str(self.shell.user_ns["_"])) |
|
764 | 782 | return |
|
765 | 783 | # Get history range |
|
766 | 784 | histlines = self.history_manager.get_range_by_str(arg) |
|
767 | 785 | cmd = "\n".join(x[2] for x in histlines) |
|
768 | 786 | if cmd: |
|
769 | 787 | self.set_next_input(cmd.rstrip()) |
|
770 | 788 | return |
|
771 | 789 | |
|
772 | 790 | try: # Variable in user namespace |
|
773 | 791 | cmd = str(eval(arg, self.shell.user_ns)) |
|
774 | 792 | except Exception: # Search for term in history |
|
775 | 793 | histlines = self.history_manager.search("*"+arg+"*") |
|
776 | 794 | for h in reversed([x[2] for x in histlines]): |
|
777 | 795 | if 'rep' in h: |
|
778 | 796 | continue |
|
779 | 797 | self.set_next_input(h.rstrip()) |
|
780 | 798 | return |
|
781 | 799 | else: |
|
782 | 800 | self.set_next_input(cmd.rstrip()) |
|
783 | 801 | print("Couldn't evaluate or find in history:", arg) |
|
784 | 802 | |
|
785 | 803 | def magic_rerun(self, parameter_s=''): |
|
786 | 804 | """Re-run previous input |
|
787 | 805 | |
|
788 | 806 | By default, you can specify ranges of input history to be repeated |
|
789 | 807 | (as with %history). With no arguments, it will repeat the last line. |
|
790 | 808 | |
|
791 | 809 | Options: |
|
792 | 810 | |
|
793 | 811 | -l <n> : Repeat the last n lines of input, not including the |
|
794 | 812 | current command. |
|
795 | 813 | |
|
796 | 814 | -g foo : Repeat the most recent line which contains foo |
|
797 | 815 | """ |
|
798 | 816 | opts, args = self.parse_options(parameter_s, 'l:g:', mode='string') |
|
799 | 817 | if "l" in opts: # Last n lines |
|
800 | 818 | n = int(opts['l']) |
|
801 | 819 | hist = self.history_manager.get_tail(n) |
|
802 | 820 | elif "g" in opts: # Search |
|
803 | 821 | p = "*"+opts['g']+"*" |
|
804 | 822 | hist = list(self.history_manager.search(p)) |
|
805 | 823 | for l in reversed(hist): |
|
806 | 824 | if "rerun" not in l[2]: |
|
807 | 825 | hist = [l] # The last match which isn't a %rerun |
|
808 | 826 | break |
|
809 | 827 | else: |
|
810 | 828 | hist = [] # No matches except %rerun |
|
811 | 829 | elif args: # Specify history ranges |
|
812 | 830 | hist = self.history_manager.get_range_by_str(args) |
|
813 | 831 | else: # Last line |
|
814 | 832 | hist = self.history_manager.get_tail(1) |
|
815 | 833 | hist = [x[2] for x in hist] |
|
816 | 834 | if not hist: |
|
817 | 835 | print("No lines in history match specification") |
|
818 | 836 | return |
|
819 | 837 | histlines = "\n".join(hist) |
|
820 | 838 | print("=== Executing: ===") |
|
821 | 839 | print(histlines) |
|
822 | 840 | print("=== Output: ===") |
|
823 | 841 | self.run_cell("\n".join(hist), store_history=False) |
|
824 | 842 | |
|
825 | 843 | |
|
826 | 844 | def init_ipython(ip): |
|
827 | 845 | ip.define_magic("rep", magic_rep) |
|
828 | 846 | ip.define_magic("recall", magic_rep) |
|
829 | 847 | ip.define_magic("rerun", magic_rerun) |
|
830 | 848 | ip.define_magic("hist",magic_history) # Alternative name |
|
831 | 849 | ip.define_magic("history",magic_history) |
|
832 | 850 | |
|
833 | 851 | # XXX - ipy_completers are in quarantine, need to be updated to new apis |
|
834 | 852 | #import ipy_completers |
|
835 | 853 | #ipy_completers.quick_completer('%hist' ,'-g -t -r -n') |
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