Mercurial > piecrust2

annotate piecrust/processing/tree.py @ 371:c2ca72fb7f0b 2.0.0a8

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caching: Use separate caches for config variants and other contexts. * The `_cache` directory is now organized in multiple "sub-caches" for different contexts. * A new context is created when config variants or overrides are applied. * `serve` context uses a different context that the other commends, to prevent the `bake` command's output from messing up the preview server (e.g. with how asset URLs are generated differently between the two). * Fix a few places where the cache directory was referenced directly.
author Ludovic Chabant <ludovic@chabant.com>
date Sun, 03 May 2015 23:59:46 -0700
parents a47580a0955b
children c4b3a7fd2f87
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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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133845647083 Better error management and removal support in baking/processing.
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5 from piecrust.chefutil import format_timed
3
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6
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7
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8 logger = logging.getLogger(__name__)
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9
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10
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11 STATE_UNKNOWN = 0
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12 STATE_DIRTY = 1
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13 STATE_CLEAN = 2
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14
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15
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16 FORCE_BUILD = object()
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17
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18
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19 class ProcessingTreeError(Exception):
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20 pass
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21
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22
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23 class ProcessorNotFoundError(ProcessingTreeError):
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24 pass
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25
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26
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27 class ProcessorError(ProcessingTreeError):
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28 def __init__(self, proc_name, in_path, *args):
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29 super(ProcessorError, self).__init__(*args)
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30 self.proc_name = proc_name
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31 self.in_path = in_path
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32
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33 def __str__(self):
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34 return "Processor %s failed on: %s" % (self.proc_name, self.in_path)
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35
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36
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37 class ProcessingTreeNode(object):
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38 def __init__(self, path, available_procs, level=0):
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39 self.path = path
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40 self.available_procs = available_procs
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41 self.outputs = []
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42 self.level = level
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43 self.state = STATE_UNKNOWN
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44 self._processor = None
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45
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46 def getProcessor(self):
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47 if self._processor is None:
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48 for p in self.available_procs:
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49 if p.matches(self.path):
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50 self._processor = p
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51 self.available_procs.remove(p)
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52 break
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53 else:
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54 raise ProcessorNotFoundError()
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55 return self._processor
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56
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57 def setState(self, state, recursive=True):
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58 self.state = state
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59 if recursive:
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60 for o in self.outputs:
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61 o.setState(state, True)
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62
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63 @property
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64 def is_leaf(self):
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65 return len(self.outputs) == 0
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66
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67 def getLeaves(self):
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68 if self.is_leaf:
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69 return [self]
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70 leaves = []
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71 for o in self.outputs:
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72 for l in o.getLeaves():
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73 leaves.append(l)
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74 return leaves
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75
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76
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77 class ProcessingTreeBuilder(object):
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78 def __init__(self, processors):
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79 self.processors = processors
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80
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81 def build(self, path):
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82 start_time = time.clock()
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83 tree_root = ProcessingTreeNode(path, list(self.processors))
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84
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85 loop_guard = 100
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86 walk_stack = [tree_root]
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87 while len(walk_stack) > 0:
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88 loop_guard -= 1
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89 if loop_guard <= 0:
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90 raise ProcessingTreeError("Infinite loop detected!")
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91
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92 cur_node = walk_stack.pop()
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93 proc = cur_node.getProcessor()
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94
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95 # If the root tree node (and only that one) wants to bypass this
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96 # whole tree business, so be it.
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97 if proc.is_bypassing_structured_processing:
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98 if cur_node != tree_root:
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99 raise ProcessingTreeError("Only root processors can "
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100 "bypass structured processing.")
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101 break
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102
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103 # Get the destination directory and output files.
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104 rel_dir, basename = os.path.split(cur_node.path)
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105 out_names = proc.getOutputFilenames(basename)
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106 if out_names is None:
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107 continue
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108
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109 for n in out_names:
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110 out_node = ProcessingTreeNode(
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111 os.path.join(rel_dir, n),
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112 list(cur_node.available_procs),
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113 cur_node.level + 1)
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114 cur_node.outputs.append(out_node)
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115
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116 if proc.PROCESSOR_NAME != 'copy':
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117 walk_stack.append(out_node)
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118
132
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119 logger.debug(format_timed(
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120 start_time, "Built processing tree for: %s" % path,
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121 colored=False))
3
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122 return tree_root
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123
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124
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125 class ProcessingTreeRunner(object):
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126 def __init__(self, base_dir, tmp_dir, out_dir, lock=None):
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127 self.base_dir = base_dir
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128 self.tmp_dir = tmp_dir
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129 self.out_dir = out_dir
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130 self.lock = lock
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131
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132 def processSubTree(self, tree_root):
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133 did_process = False
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134 walk_stack = [tree_root]
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135 while len(walk_stack) > 0:
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136 cur_node = walk_stack.pop()
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137
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138 self._computeNodeState(cur_node)
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139 if cur_node.state == STATE_DIRTY:
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diff changeset
140 did_process_this_node = self.processNode(cur_node)
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diff changeset
141 did_process |= did_process_this_node
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142
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143 if did_process_this_node:
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144 for o in cur_node.outputs:
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145 if not o.is_leaf:
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146 walk_stack.append(o)
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147 else:
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148 for o in cur_node.outputs:
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149 if not o.is_leaf:
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diff changeset
150 walk_stack.append(o)
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151 return did_process
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152
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153 def processNode(self, node):
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154 full_path = self._getNodePath(node)
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155 proc = node.getProcessor()
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156 if proc.is_bypassing_structured_processing:
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157 try:
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158 start_time = time.clock()
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159 proc.process(full_path, self.out_dir)
117
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diff changeset
160 print_node(
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diff changeset
161 node,
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diff changeset
162 format_timed(
132
3834e2ef0cf2 Don't colour debug output.
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diff changeset
163 start_time, "(bypassing structured processing)",
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diff changeset
164 colored=False))
3
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165 return True
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166 except Exception as e:
215
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diff changeset
167 raise ProcessorError(proc.PROCESSOR_NAME, full_path) from e
3
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168
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169 # All outputs of a node must go to the same directory, so we can get
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170 # the output directory off of the first output.
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171 base_out_dir = self._getNodeBaseDir(node.outputs[0])
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172 rel_out_dir = os.path.dirname(node.path)
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173 out_dir = os.path.join(base_out_dir, rel_out_dir)
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174 if not os.path.isdir(out_dir):
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175 if self.lock:
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176 with self.lock:
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177 if not os.path.isdir(out_dir):
5
474c9882decf Upgrade to Python 3.
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178 os.makedirs(out_dir, 0o755)
3
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179 else:
5
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180 os.makedirs(out_dir, 0o755)
3
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181
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182 try:
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183 start_time = time.clock()
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diff changeset
184 proc_res = proc.process(full_path, out_dir)
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185 if proc_res is None:
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186 raise Exception("Processor '%s' didn't return a boolean "
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187 "result value." % proc)
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188 if proc_res:
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189 print_node(node, "-> %s" % out_dir)
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190 return True
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191 else:
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192 print_node(node, "-> %s [clean]" % out_dir)
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193 return False
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194 except Exception as e:
215
a47580a0955b bake: Better error handling for the processing pipeline.
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diff changeset
195 raise ProcessorError(proc.PROCESSOR_NAME, full_path) from e
3
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196
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197 def _computeNodeState(self, node):
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198 if node.state != STATE_UNKNOWN:
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199 return
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diff changeset
200
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diff changeset
201 proc = node.getProcessor()
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diff changeset
202 if (proc.is_bypassing_structured_processing or
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203 not proc.is_delegating_dependency_check):
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204 # This processor wants to handle things on its own...
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diff changeset
205 node.setState(STATE_DIRTY, False)
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diff changeset
206 return
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diff changeset
207
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diff changeset
208 start_time = time.clock()
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diff changeset
209
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210 # Get paths and modification times for the input path and
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diff changeset
211 # all dependencies (if any).
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diff changeset
212 base_dir = self._getNodeBaseDir(node)
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diff changeset
213 full_path = os.path.join(base_dir, node.path)
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diff changeset
214 in_mtime = (full_path, os.path.getmtime(full_path))
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diff changeset
215 force_build = False
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diff changeset
216 try:
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diff changeset
217 deps = proc.getDependencies(full_path)
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diff changeset
218 if deps == FORCE_BUILD:
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diff changeset
219 force_build = True
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diff changeset
220 elif deps is not None:
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diff changeset
221 for dep in deps:
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diff changeset
222 dep_mtime = os.path.getmtime(dep)
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223 if dep_mtime > in_mtime[1]:
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diff changeset
224 in_mtime = (dep, dep_mtime)
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diff changeset
225 except Exception as e:
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diff changeset
226 logger.warning("%s -- Will force-bake: %s" % (e, node.path))
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diff changeset
227 node.setState(STATE_DIRTY, True)
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diff changeset
228 return
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diff changeset
229
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diff changeset
230 if force_build:
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diff changeset
231 # Just do what the processor told us to do.
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diff changeset
232 node.setState(STATE_DIRTY, True)
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diff changeset
233 message = "Processor requested a forced build."
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
234 print_node(node, message)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
235 else:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
236 # Get paths and modification times for the outputs.
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diff changeset
237 message = None
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diff changeset
238 for o in node.outputs:
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diff changeset
239 full_out_path = self._getNodePath(o)
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diff changeset
240 if not os.path.isfile(full_out_path):
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diff changeset
241 message = "Output '%s' doesn't exist." % o.path
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diff changeset
242 break
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diff changeset
243 o_mtime = os.path.getmtime(full_out_path)
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diff changeset
244 if o_mtime < in_mtime[1]:
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diff changeset
245 message = "Input '%s' is newer than output '%s'." % (
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
246 in_mtime[0], o.path)
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diff changeset
247 break
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diff changeset
248 if message is not None:
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diff changeset
249 node.setState(STATE_DIRTY, True)
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diff changeset
250 message += " Re-processing sub-tree."
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
251 print_node(node, message)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
252 else:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
253 node.setState(STATE_CLEAN, False)
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diff changeset
254
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
255 state = "dirty" if node.state == STATE_DIRTY else "clean"
120
133845647083 Better error management and removal support in baking/processing.
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parents: 117
diff changeset
256 logger.debug(format_timed(start_time,
133845647083 Better error management and removal support in baking/processing.
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parents: 117
diff changeset
257 "Computed node dirtyness: %s" % state,
132
3834e2ef0cf2 Don't colour debug output.
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parents: 120
diff changeset
258 indent_level=node.level, colored=False))
3
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parents:
diff changeset
259
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
260 def _getNodeBaseDir(self, node):
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diff changeset
261 if node.level == 0:
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diff changeset
262 return self.base_dir
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diff changeset
263 if node.is_leaf:
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diff changeset
264 return self.out_dir
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diff changeset
265 return os.path.join(self.tmp_dir, str(node.level))
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parents:
diff changeset
266
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diff changeset
267 def _getNodePath(self, node):
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diff changeset
268 base_dir = self._getNodeBaseDir(node)
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diff changeset
269 return os.path.join(base_dir, node.path)
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parents:
diff changeset
270
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271
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272 def print_node(node, message=None, recursive=False):
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273 indent = ' ' * node.level
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274 try:
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275 proc_name = node.getProcessor().PROCESSOR_NAME
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276 except ProcessorNotFoundError:
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277 proc_name = 'n/a'
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278
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279 message = message or ''
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280 logger.debug('%s%s [%s] %s' % (indent, node.path, proc_name, message))
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281
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282 if recursive:
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283 for o in node.outputs:
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284 print_node(o, None, True)
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285
191
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286
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287 def get_node_name_tree(node):
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288 try:
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289 proc_name = node.getProcessor().PROCESSOR_NAME
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290 except ProcessorNotFoundError:
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291 proc_name = 'n/a'
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292
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293 children = []
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294 for o in node.outputs:
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295 if not o.outputs:
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296 continue
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297 children.append(get_node_name_tree(o))
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298 return (proc_name, children)
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299