Mercurial > piecrust2

annotate piecrust/processing/tree.py @ 55:45828c4167ad

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Processors can match on other things than just the extension.
author Ludovic Chabant <ludovic@chabant.com>
date Mon, 25 Aug 2014 21:40:25 -0700
parents 0170f449f924
children 6827dcc9d3fb
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
3
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1 import os
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2 import time
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3 import os.path
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4 import logging
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5
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6
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7 logger = logging.getLogger(__name__)
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8
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9
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10 STATE_UNKNOWN = 0
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11 STATE_DIRTY = 1
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12 STATE_CLEAN = 2
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13
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14
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15 FORCE_BUILD = object()
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16
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17
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18 class ProcessingTreeError(Exception):
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19 pass
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20
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21
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22 class ProcessorNotFoundError(ProcessingTreeError):
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23 pass
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24
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25
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26 class ProcessingTreeNode(object):
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27 def __init__(self, path, available_procs, level=0):
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28 self.path = path
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29 self.available_procs = available_procs
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30 self.outputs = []
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31 self.level = level
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32 self.state = STATE_UNKNOWN
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33 self._processor = None
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34
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35 def getProcessor(self):
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36 if self._processor is None:
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37 _, filename = os.path.split(self.path)
3
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38 for p in self.available_procs:
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39 if p.matches(filename):
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40 self._processor = p
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41 self.available_procs.remove(p)
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42 break
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43 else:
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44 raise ProcessorNotFoundError()
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45 return self._processor
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46
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47 def setState(self, state, recursive=True):
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48 self.state = state
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49 if recursive:
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50 for o in self.outputs:
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51 o.setState(state, True)
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52
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53 @property
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54 def is_leaf(self):
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55 return len(self.outputs) == 0
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56
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57 def getLeaves(self):
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58 if self.is_leaf:
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59 return [self]
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60 leaves = []
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61 for o in self.outputs:
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62 for l in o.getLeaves():
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63 leaves.append(l)
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64 return leaves
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65
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66
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67 class ProcessingTreeBuilder(object):
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68 def __init__(self, processors):
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69 self.processors = processors
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70
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71 def build(self, path):
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72 start_time = time.clock()
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73 tree_root = ProcessingTreeNode(path, list(self.processors))
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74
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75 loop_guard = 100
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76 walk_stack = [tree_root]
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77 while len(walk_stack) > 0:
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78 loop_guard -= 1
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79 if loop_guard <= 0:
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80 raise ProcessingTreeError("Infinite loop detected!")
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81
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82 cur_node = walk_stack.pop()
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83 proc = cur_node.getProcessor()
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84
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85 # If the root tree node (and only that one) wants to bypass this
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86 # whole tree business, so be it.
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87 if proc.is_bypassing_structured_processing:
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88 if proc != tree_root:
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89 raise ProcessingTreeError("Only root processors can "
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90 "bypass structured processing.")
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91 break
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92
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93 # Get the destination directory and output files.
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94 rel_dir, basename = os.path.split(cur_node.path)
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95 out_names = proc.getOutputFilenames(basename)
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96 if out_names is None:
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97 continue
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98
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99 for n in out_names:
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100 out_node = ProcessingTreeNode(
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101 os.path.join(rel_dir, n),
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102 list(cur_node.available_procs),
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103 cur_node.level + 1)
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104 cur_node.outputs.append(out_node)
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105
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106 if proc.PROCESSOR_NAME != 'copy':
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107 walk_stack.append(out_node)
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108
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109 logger.debug(format_timed(start_time, "Built processing tree for: %s" % path))
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110 return tree_root
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111
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112
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113 class ProcessingTreeRunner(object):
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114 def __init__(self, base_dir, tmp_dir, out_dir, lock=None):
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115 self.base_dir = base_dir
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116 self.tmp_dir = tmp_dir
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117 self.out_dir = out_dir
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118 self.lock = lock
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119
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120 def processSubTree(self, tree_root):
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121 did_process = False
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122 walk_stack = [tree_root]
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123 while len(walk_stack) > 0:
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124 cur_node = walk_stack.pop()
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125
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126 self._computeNodeState(cur_node)
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127 if cur_node.state == STATE_DIRTY:
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128 did_process_this_node = self.processNode(cur_node)
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129 did_process |= did_process_this_node
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130
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131 if did_process_this_node:
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132 for o in cur_node.outputs:
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133 if not o.is_leaf:
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134 walk_stack.append(o)
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135 else:
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136 for o in cur_node.outputs:
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137 if not o.is_leaf:
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138 walk_stack.append(o)
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diff changeset
139 return did_process
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140
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diff changeset
141 def processNode(self, node):
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142 full_path = self._getNodePath(node)
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diff changeset
143 proc = node.getProcessor()
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diff changeset
144 if proc.is_bypassing_structured_processing:
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diff changeset
145 try:
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diff changeset
146 start_time = time.clock()
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diff changeset
147 proc.process(full_path, self.out_dir)
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148 print_node(format_timed(start_time, "(bypassing structured processing)"))
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diff changeset
149 return True
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diff changeset
150 except Exception as e:
18
0170f449f924 Slightly better exception throwing in the processing pipeline.
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parents: 5
diff changeset
151 raise Exception("Error processing: %s" % node.path) from e
3
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diff changeset
152
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diff changeset
153 # All outputs of a node must go to the same directory, so we can get
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diff changeset
154 # the output directory off of the first output.
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diff changeset
155 base_out_dir = self._getNodeBaseDir(node.outputs[0])
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diff changeset
156 rel_out_dir = os.path.dirname(node.path)
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157 out_dir = os.path.join(base_out_dir, rel_out_dir)
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diff changeset
158 if not os.path.isdir(out_dir):
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diff changeset
159 if self.lock:
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diff changeset
160 with self.lock:
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161 if not os.path.isdir(out_dir):
5
474c9882decf Upgrade to Python 3.
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diff changeset
162 os.makedirs(out_dir, 0o755)
3
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diff changeset
163 else:
5
474c9882decf Upgrade to Python 3.
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164 os.makedirs(out_dir, 0o755)
3
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165
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166 try:
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167 start_time = time.clock()
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168 proc_res = proc.process(full_path, out_dir)
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169 if proc_res is None:
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170 raise Exception("Processor '%s' didn't return a boolean "
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171 "result value." % proc)
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172 if proc_res:
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173 print_node(node, "-> %s" % out_dir)
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174 return True
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175 else:
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176 print_node(node, "-> %s [clean]" % out_dir)
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177 return False
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178 except Exception as e:
18
0170f449f924 Slightly better exception throwing in the processing pipeline.
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parents: 5
diff changeset
179 raise Exception("Error processing: %s" % node.path) from e
3
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180
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181 def _computeNodeState(self, node):
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diff changeset
182 if node.state != STATE_UNKNOWN:
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diff changeset
183 return
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diff changeset
184
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185 proc = node.getProcessor()
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diff changeset
186 if (proc.is_bypassing_structured_processing or
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
187 not proc.is_delegating_dependency_check):
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diff changeset
188 # This processor wants to handle things on its own...
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189 node.setState(STATE_DIRTY, False)
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diff changeset
190 return
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diff changeset
191
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diff changeset
192 start_time = time.clock()
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diff changeset
193
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194 # Get paths and modification times for the input path and
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
195 # all dependencies (if any).
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diff changeset
196 base_dir = self._getNodeBaseDir(node)
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197 full_path = os.path.join(base_dir, node.path)
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198 in_mtime = (full_path, os.path.getmtime(full_path))
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199 force_build = False
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diff changeset
200 try:
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diff changeset
201 deps = proc.getDependencies(full_path)
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diff changeset
202 if deps == FORCE_BUILD:
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diff changeset
203 force_build = True
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diff changeset
204 elif deps is not None:
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diff changeset
205 for dep in deps:
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diff changeset
206 dep_mtime = os.path.getmtime(dep)
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diff changeset
207 if dep_mtime > in_mtime[1]:
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diff changeset
208 in_mtime = (dep, dep_mtime)
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diff changeset
209 except Exception as e:
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diff changeset
210 logger.warning("%s -- Will force-bake: %s" % (e, node.path))
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parents:
diff changeset
211 node.setState(STATE_DIRTY, True)
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diff changeset
212 return
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parents:
diff changeset
213
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diff changeset
214 if force_build:
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diff changeset
215 # Just do what the processor told us to do.
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diff changeset
216 node.setState(STATE_DIRTY, True)
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diff changeset
217 message = "Processor requested a forced build."
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diff changeset
218 print_node(node, message)
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parents:
diff changeset
219 else:
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diff changeset
220 # Get paths and modification times for the outputs.
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diff changeset
221 message = None
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diff changeset
222 for o in node.outputs:
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diff changeset
223 full_out_path = self._getNodePath(o)
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parents:
diff changeset
224 if not os.path.isfile(full_out_path):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
225 message = "Output '%s' doesn't exist." % o.path
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parents:
diff changeset
226 break
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parents:
diff changeset
227 o_mtime = os.path.getmtime(full_out_path)
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parents:
diff changeset
228 if o_mtime < in_mtime[1]:
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diff changeset
229 message = "Input '%s' is newer than output '%s'." % (
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
230 in_mtime[0], o.path)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
231 break
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
232 if message is not None:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
233 node.setState(STATE_DIRTY, True)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
234 message += " Re-processing sub-tree."
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
235 print_node(node, message)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
236 else:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
237 node.setState(STATE_CLEAN, False)
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diff changeset
238
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diff changeset
239 state = "dirty" if node.state == STATE_DIRTY else "clean"
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diff changeset
240 logger.debug(format_timed(start_time, "Computed node dirtyness: %s" % state, node.level))
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parents:
diff changeset
241
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
242 def _getNodeBaseDir(self, node):
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diff changeset
243 if node.level == 0:
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diff changeset
244 return self.base_dir
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diff changeset
245 if node.is_leaf:
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diff changeset
246 return self.out_dir
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diff changeset
247 return os.path.join(self.tmp_dir, str(node.level))
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diff changeset
248
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diff changeset
249 def _getNodePath(self, node):
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diff changeset
250 base_dir = self._getNodeBaseDir(node)
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251 return os.path.join(base_dir, node.path)
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diff changeset
252
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diff changeset
253
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diff changeset
254 def print_node(node, message=None, recursive=False):
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diff changeset
255 indent = ' ' * node.level
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diff changeset
256 try:
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diff changeset
257 proc_name = node.getProcessor().PROCESSOR_NAME
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diff changeset
258 except ProcessorNotFoundError:
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diff changeset
259 proc_name = 'n/a'
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diff changeset
260
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diff changeset
261 message = message or ''
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diff changeset
262 logger.debug('%s%s [%s] %s' % (indent, node.path, proc_name, message))
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parents:
diff changeset
263
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
264 if recursive:
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diff changeset
265 for o in node.outputs:
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parents:
diff changeset
266 print_node(o, None, True)
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parents:
diff changeset
267
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parents:
diff changeset
268
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
269 def format_timed(start_time, message, indent_level=0):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
270 end_time = time.clock()
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diff changeset
271 indent = indent_level * ' '
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parents:
diff changeset
272 build_time = '{0:8.1f} ms'.format((end_time - start_time) / 1000.0)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
273 return "%s[%s] %s" % (indent, build_time, message)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
274