Mercurial > hg > PaInt
annotate paint/package.py @ 13:0dd1f8f83be2
moving towards some sort of organization
| author | Jeff Hammel <jhammel@mozilla.com> |
|---|---|
| date | Fri, 24 Feb 2012 15:39:42 -0800 |
| parents | ceb8c69a16f3 |
| children | 6d27c2136163 |
| rev | line source |
|---|---|
| 4 | 1 """ |
| 2 package model for python PAckage INTrospection | |
| 3 """ | |
| 4 | |
| 7 | 5 import os |
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6 import shutil |
| 7 | 7 import tarfile |
| 5 | 8 import tempfile |
| 7 | 9 import urllib2 |
| 10 import utils | |
| 5 | 11 |
| 10 | 12 __all__ = ['Package'] |
| 13 | |
| 4 | 14 class Package(object): |
| 7 | 15 # XXX much of this is generic resource stuff and should be split off |
| 4 | 16 |
| 17 def __init__(self, src): | |
| 18 self.src = src | |
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19 |
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20 # ephemeral data |
| 5 | 21 self._tmppath = None |
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22 self._egg_info = None |
| 5 | 23 |
| 24 def path(self): | |
| 25 """filesystem path to package""" | |
| 7 | 26 |
| 27 # return cached copy if it exists | |
| 28 if self._tmppath: | |
| 29 return self._tmppath | |
| 30 | |
| 31 # fetch from the web if a URL | |
| 32 tmpfile = None | |
| 33 src = self.src | |
| 5 | 34 if utils.isURL(self.src): |
| 8 | 35 tmpfile = src = self.fetch() |
| 7 | 36 |
| 37 # unpack if an archive | |
| 38 if self.is_archive(src): | |
| 8 | 39 try: |
| 40 self.unpack(src) | |
| 41 finally: | |
| 42 if tmpfile: | |
| 43 os.remove(tmpfile) | |
| 7 | 44 return self._tmppath |
| 45 | |
| 5 | 46 return self.src |
| 47 | |
| 48 def fetch(self): | |
| 8 | 49 """fetch from remote source to a temporary file""" |
| 11 | 50 fd, filename = tempfile.mkstemp() |
| 51 resource = urllib2.urlopen(self.src) | |
| 7 | 52 os.write(fd, resource.read()) |
| 53 os.close(fd) | |
| 54 return filename | |
| 55 | |
| 56 def unpack(self, archive): | |
| 57 """unpack the archive to a temporary destination""" | |
| 58 # TODO: should handle zipfile additionally at least | |
| 59 # Ideally, this would be pluggable, etc | |
| 8 | 60 assert tarfile.is_tarfile(archive), "%s is not an archive" % self.src |
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now the package class should at least extracts things. it doesnt actually do anything useful
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61 tf = tarfile.TarFile.open(archive) |
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parents:
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62 self._tmppath = tempfile.mkdtemp() |
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562230cc2e86
now the package class should at least extracts things. it doesnt actually do anything useful
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parents:
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63 tf.extractall(path=self._tmppath) |
| 7 | 64 |
| 65 def is_archive(self, path): | |
| 66 """returns if the filesystem path is an archive""" | |
| 67 # TODO: should handle zipfile additionally at least | |
| 68 # Ideally, this would be pluggable, etc | |
| 69 return tarfile.is_tarfile(path) | |
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now the package class should at least extracts things. it doesnt actually do anything useful
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70 |
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71 def cleanup(self): |
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72 if self._tmppath: |
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parents:
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73 shutil.rmtree(self._tmppath) |
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parents:
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74 self._tmppath = None |
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parents:
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75 |
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76 __del__ = cleanup |
| 11 | 77 |
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78 ### python-package-specific functionality |
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79 |
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80 def egg_info(self): |
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81 """build the egg_info directory""" |
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82 |
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83 if self._egg_info: |
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84 # return cached copy |
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85 return self._egg_info |
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86 |
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87 directory = self.path |
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88 |
| 11 | 89 def info(self): |
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90 """return info dictionary for package""" |
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91 directory = self.path() |
| 11 | 92 assert os.path.exists(os.path.join(path, 'setup.py')) |
| 93 | |
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94 # setup the egg info |
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95 call([sys.executable, 'setup.py', 'egg_info'], cwd=directory, stdout=PIPE) |
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parents:
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96 |
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97 # get the .egg-info directory |
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98 egg_info = [i for i in os.listdir(directory) |
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parents:
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99 if i.endswith('.egg-info')] |
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parents:
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100 assert len(egg_info) == 1, 'Expected one .egg-info directory in %s, got: %s' % (directory, egg_info) |
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101 egg_info = os.path.join(directory, egg_info[0]) |
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parents:
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102 assert os.path.isdir(egg_info), "%s is not a directory" % egg_info |
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103 |
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104 # read the dependencies |
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105 requires = os.path.join(egg_info, 'requires.txt') |
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106 if os.path.exists(requires): |
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107 dependencies = [i.strip() for i in file(requires).readlines() if i.strip()] |
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108 else: |
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109 dependencies = [] |
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110 |
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111 # read the package information |
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112 pkg_info = os.path.join(egg_info, 'PKG-INFO') |
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113 info_dict = {} |
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114 for line in file(pkg_info).readlines(): |
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115 if not line or line[0].isspace(): |
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116 continue # XXX neglects description |
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117 assert ':' in line |
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118 key, value = [i.strip() for i in line.split(':', 1)] |
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119 info_dict[key] = value |
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120 |
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121 # return the information |
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122 return info_dict['Name'], dependencies |
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123 |
| 11 | 124 def dependencies(self): |
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125 info = self.info() |