Mercurial > sqlpython

annotate cmd2.py @ 24:7a89805a47b1

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load cleaned up
author devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
date Wed, 19 Dec 2007 15:09:24 -0500
parents 07aae987b754
children c99853267a44
rev   line source
20
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1 """Variant on standard library's cmd with extra features:
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2
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3 Searchable command history
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4 Multi-line commands
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5 Case-insensitive commands
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6 Special-character shortcut commands
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7
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8 still to do:
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9 environment (maxrows, etc.)
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10 edit
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11
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12 """
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13 import cmd, re, os
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14
24
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15 class Statekeeper(object):
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16 def __init__(self, obj, attribs):
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17 self.obj = obj
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18 self.attribs = attribs
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19 self.save()
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20 def save(self):
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21 for attrib in self.attribs:
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22 setattr(self, attrib, getattr(self.obj, attrib))
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23 def restore(self):
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24 for attrib in self.attribs:
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25 setattr(self.obj, attrib, getattr(self, attrib))
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26
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27 class Cmd(cmd.Cmd):
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28 caseInsensitive = True
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29 multilineCommands = []
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30 continuationPrompt = '> '
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31 shortcuts = {'?': 'help', '!': 'shell', '@': 'load'}
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32 excludeFromHistory = '''run r list l history hi ed li eof'''.split()
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33 defaultExtension = 'txt'
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34 def __init__(self, *args, **kwargs):
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35 cmd.Cmd.__init__(self, *args, **kwargs)
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36 self.history = History()
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37
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38 def precmd(self, line):
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39 """Hook method executed just before the command line is
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40 interpreted, but after the input prompt is generated and issued.
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41
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42 Makes commands case-insensitive (but unfortunately does not alter command completion).
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43 """
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44 try:
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45 (command, args) = line.split(None,1)
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46 except ValueError:
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47 (command, args) = line, ''
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48 if self.caseInsensitive:
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49 command = command.lower()
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50 statement = ' '.join([command, args])
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51 if (not self.multilineCommands) or (command not in self.multilineCommands):
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52 return statement
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53 return self.finishStatement(statement)
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54
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55 def postcmd(self, stop, line):
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56 """Hook method executed just after a command dispatch is finished."""
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57 try:
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58 command = line.split(None,1)[0].lower()
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59 if command not in self.excludeFromHistory:
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60 self.history.append(line)
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61 finally:
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62 return stop
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63
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64 def finishStatement(self, firstline):
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65 statement = firstline
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66 while not self.statementHasEnded(statement):
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67 statement = '%s\n%s' % (statement, self.pseudo_raw_input(self.continuationPrompt))
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68 return statement
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69 # assembling a list of lines and joining them at the end would be faster,
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70 # but statementHasEnded needs a string arg; anyway, we're getting
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71 # user input and users are slow.
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72
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73 def pseudo_raw_input(self, prompt):
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74 """copied from cmd's cmdloop; like raw_input, but accounts for changed stdin, stdout"""
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75
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76 if self.use_rawinput:
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77 try:
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78 line = raw_input(prompt)
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79 except EOFError:
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80 line = 'EOF'
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81 else:
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82 self.stdout.write(prompt)
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83 self.stdout.flush()
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84 line = self.stdin.readline()
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85 if not len(line):
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86 line = 'EOF'
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87 else:
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88 line = line[:-1] # chop \n
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89 return line
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90
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91 def do_EOF(self, arg):
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92 return True
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93 do_eof = do_EOF
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94
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95 statementEndPattern = re.compile(r'[\n;]\s*$')
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96 def statementHasEnded(self, lines):
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97 """This version lets statements end with ; or with a blank line.
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98 Override for your own needs."""
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99 return bool(self.statementEndPattern.search(lines))
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100
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101 def parseline(self, line):
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102 """Parse the line into a command name and a string containing
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103 the arguments. Returns a tuple containing (command, args, line).
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104 'command' and 'args' may be None if the line couldn't be parsed.
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105 """
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106 line = line.strip()
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107 if not line:
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108 return None, None, line
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109 shortcut = self.shortcuts.get(line[0])
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110 if shortcut and hasattr(self, 'do_%s' % shortcut):
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111 line = '%s %s' % (shortcut, line[1:])
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112 i, n = 0, len(line)
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113 while i < n and line[i] in self.identchars: i = i+1
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114 cmd, arg = line[:i], line[i:].strip()
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115 return cmd, arg, line
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116
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117 def do_shell(self, arg):
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118 'execute a command as if at the OS prompt.'
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119 os.system(arg)
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120
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121 def do_history(self, arg):
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122 """history [arg]: lists past commands issued
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123
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124 no arg -> list all
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125 arg is integer -> list one history item, by index
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diff changeset
126 arg is string -> string search
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parents:
diff changeset
127 arg is /enclosed in forward-slashes/ -> regular expression search
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parents:
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128 """
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents:
diff changeset
129 if arg:
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parents:
diff changeset
130 history = self.history.get(arg)
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents:
diff changeset
131 else:
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parents:
diff changeset
132 history = self.history
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parents:
diff changeset
133 for hi in history:
21
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 20
diff changeset
134 self.stdout.write(hi.pr())
16
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parents:
diff changeset
135 def last_matching(self, arg):
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parents:
diff changeset
136 try:
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents:
diff changeset
137 if arg:
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents:
diff changeset
138 return self.history.get(arg)[-1]
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents:
diff changeset
139 else:
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parents:
diff changeset
140 return self.history[-1]
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents:
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141 except:
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents:
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142 return None
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents:
diff changeset
143 def do_list(self, arg):
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents:
diff changeset
144 """list [arg]: lists last command issued
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents:
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145
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parents:
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146 no arg -> list absolute last
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parents:
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147 arg is integer -> list one history item, by index
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parents:
diff changeset
148 - arg, arg - (integer) -> list up to or after #arg
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parents:
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149 arg is string -> list last command matching string search
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parents:
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150 arg is /enclosed in forward-slashes/ -> regular expression search
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parents:
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151 """
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parents:
diff changeset
152 try:
21
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diff changeset
153 self.stdout.write(self.last_matching(arg).pr())
16
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents:
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154 except:
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents:
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155 pass
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parents:
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156 do_hi = do_history
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parents:
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157 do_l = do_list
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parents:
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158 do_li = do_list
21
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parents: 20
diff changeset
159
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diff changeset
160 def breakupStatements(self, txt):
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parents: 20
diff changeset
161 """takes text that may include multiple statements and
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parents: 20
diff changeset
162 breaks it into a list of individual statements."""
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parents: 20
diff changeset
163 result = ['']
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parents: 20
diff changeset
164 for line in txt.splitlines():
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parents: 20
diff changeset
165 result[-1] += line
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parents: 20
diff changeset
166 if self.statementHasEnded(result[-1]):
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parents: 20
diff changeset
167 result.append('')
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parents: 20
diff changeset
168
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parents: 20
diff changeset
169 def do_load(self, fname):
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parents: 20
diff changeset
170 """Runs command(s) from a file."""
24
7a89805a47b1 load cleaned up
devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 23
diff changeset
171 keepstate = Statekeeper(self, ('stdin','use_rawinput','prompt','continuationPrompt'))
21
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parents: 20
diff changeset
172 try:
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parents: 20
diff changeset
173 self.stdin = open(fname, 'r')
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parents: 20
diff changeset
174 except IOError, e:
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parents: 20
diff changeset
175 try:
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 20
diff changeset
176 self.stdin = open('%s.%s' % (fname, self.defaultExtension), 'r')
24
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 23
diff changeset
177 self.use_rawinput = False
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parents: 23
diff changeset
178 self.prompt = self.continuationPrompt = ''
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parents: 23
diff changeset
179 self.cmdloop()
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parents: 23
diff changeset
180 self.stdin.close()
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parents: 23
diff changeset
181 self.lastcmd = ''
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parents: 23
diff changeset
182 except IOError:
21
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 20
diff changeset
183 print 'Problem opening file %s: \n%s' % (fname, e)
24
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 23
diff changeset
184 finally:
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parents: 23
diff changeset
185 keepstate.restore()
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parents: 23
diff changeset
186
20
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parents: 19
diff changeset
187 class HistoryItem(str):
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parents: 19
diff changeset
188 def __init__(self, instr):
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parents: 19
diff changeset
189 str.__init__(self, instr)
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parents: 19
diff changeset
190 self.lowercase = self.lower()
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parents: 19
diff changeset
191 self.idx = None
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parents: 19
diff changeset
192 def pr(self):
21
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parents: 20
diff changeset
193 return '-------------------------[%d]\n%s\n' % (self.idx, str(self))
20
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parents: 19
diff changeset
194
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diff changeset
195 class History(list):
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parents: 19
diff changeset
196 rangeFrom = re.compile(r'^([\d])+\s*\-$')
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 19
diff changeset
197 def append(self, new):
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parents: 19
diff changeset
198 new = HistoryItem(new)
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parents: 19
diff changeset
199 list.append(self, new)
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parents: 19
diff changeset
200 new.idx = len(self)
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 19
diff changeset
201 def extend(self, new):
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parents: 19
diff changeset
202 for n in new:
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parents: 19
diff changeset
203 self.append(n)
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parents: 19
diff changeset
204 def get(self, getme):
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 19
diff changeset
205 try:
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 19
diff changeset
206 getme = int(getme)
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 19
diff changeset
207 if getme < 0:
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parents: 19
diff changeset
208 return self[:(-1 * getme)]
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 19
diff changeset
209 else:
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parents: 19
diff changeset
210 return [self[getme-1]]
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 19
diff changeset
211 except IndexError:
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 19
diff changeset
212 return []
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 19
diff changeset
213 except (ValueError, TypeError):
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 19
diff changeset
214 getme = getme.strip()
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 19
diff changeset
215 mtch = self.rangeFrom.search(getme)
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 19
diff changeset
216 if mtch:
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 19
diff changeset
217 return self[(int(mtch.group(1))-1):]
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 19
diff changeset
218 if getme.startswith(r'/') and getme.endswith(r'/'):
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 19
diff changeset
219 finder = re.compile(getme[1:-1], re.DOTALL | re.MULTILINE | re.IGNORECASE)
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 19
diff changeset
220 def isin(hi):
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 19
diff changeset
221 return finder.search(hi)
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 19
diff changeset
222 else:
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 19
diff changeset
223 def isin(hi):
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 19
diff changeset
224 return (getme.lower() in hi.lowercase)
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 19
diff changeset
225 return [itm for itm in self if isin(itm)]
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devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 19
diff changeset
226
17
25e908abf199 multiline into cmd2
devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents: 16
diff changeset
227
16
2776755a3a7e beginning separation of cmd2
devlinjs@FA7CZA6N1254998.wrightpatterson.afmc.ds.af.mil
parents:
diff changeset
228