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1 # |
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2 # Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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3 # All rights reserved. |
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4 # This component and the accompanying materials are made available |
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5 # under the terms of the License "Eclipse Public License v1.0" |
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6 # which accompanies this distribution, and is available |
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7 # at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 # |
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9 # Initial Contributors: |
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10 # Nokia Corporation - initial contribution. |
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11 # |
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12 # Contributors: |
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13 # |
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14 # Description: |
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15 # Minimise the dependencies in a C preprocessor dependency file to |
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16 # those that CPP could not find. Then add in an assumption about |
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17 # where to find them. Output is assumed to be relevant to only one target |
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18 # even if multiple dep files are analysed. |
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19 # |
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20 |
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21 import sys |
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22 from optparse import OptionParser |
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23 import re |
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24 |
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25 class NoTargetException(Exception): |
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26 pass |
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27 |
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28 def depcrunch(file,extensions,assume): |
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29 target_pattern = r"^\s*(\S+):\s+" |
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30 target_re = re.compile(target_pattern) |
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31 # Not the use of (?i) in the following expression. re.I seems to cause re.findall |
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32 # to not actually find all files matching the extension whereas (?i) provides |
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33 # case insensitivity at the right point and it works. Really don't understand this. |
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34 extension_pattern = r"\s([^/ \t]+\.((?i)" + "|".join([t for t in extensions]) + r"))\b" |
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35 extension_re = re.compile(extension_pattern) |
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36 |
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37 target = None |
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38 |
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39 deps = [] |
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40 |
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41 # Read through the dependencies. |
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42 for l in file: |
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43 l = l.replace("\\","/").rstrip("\n\r") |
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44 |
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45 # Look out for the target name if |
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46 # we have not found it yet |
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47 if not target: |
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48 t = target_re.match(l) |
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49 if t: |
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50 target = t.groups()[0] |
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51 |
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52 # Look for prerequisites matching the |
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53 # extensions. There may be one or more on |
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54 # the same line as the target name. |
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55 # Don't use re.I - somehow prevents |
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56 # all but one match in a line which may have several files |
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57 m = extension_re.findall(l) |
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58 if m: |
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59 deps.extend([d[0] for d in m]) |
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60 |
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61 if not target: |
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62 raise NoTargetException() |
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63 |
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64 if len(deps) > 0: |
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65 print "%s: \\" % target |
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66 for d in deps[:-1]: |
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67 print " %s \\" % (assume + "/" + d) |
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68 print " %s " % (assume + "/" + deps[-1]) |
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69 |
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70 |
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71 |
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72 |
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73 ## Command Line Interface #################################################### |
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74 |
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75 parser = OptionParser(prog = "depcrunch", |
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76 usage = "%prog [-h | options] [<depfile>]") |
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77 |
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78 parser.add_option("-e", "--extensions", |
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79 action="store", dest="extensions", type='string', help="comma separated list of file extensions of missing files to keep in the crunched dep file.") |
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80 |
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81 parser.add_option("-a", "--assume", |
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82 action="store", dest="assume", type='string', help="when cpp reports missing dependencies, assume that they are in this directory") |
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83 |
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84 (options, args) = parser.parse_args() |
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85 |
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86 |
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87 if not options.extensions: |
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88 parser.error("you must specify a comma-separated list of file extensions with the -e option.") |
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89 sys.exit(1) |
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90 |
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91 if not options.assume: |
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92 parser.error("you must specify an 'assumed directory' for correcting missing dependencies with the -a option.") |
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93 sys.exit(1) |
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94 |
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95 depfilename="stdin" |
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96 if len(args) > 0: |
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97 depfilename=args[0] |
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98 file = open(depfilename,"r") |
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99 else: |
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100 file = sys.stdin |
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101 try: |
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102 depcrunch(file,options.extensions.split(","), options.assume) |
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103 except NoTargetException,e: |
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104 sys.stderr.write("Target name not found in dependency file\n"); |
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105 sys.exit(2) |
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106 |
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107 |
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108 if file != sys.stdin: |
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109 file.close() |
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110 |
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111 sys.exit(0) |