source: TI02-CSML/trunk/ez_setup.py @ 2255

Subversion URL: http://proj.badc.rl.ac.uk/svn/ndg/TI02-CSML/trunk/ez_setup.py@2587
Revision 2255, 8.3 KB checked in by spascoe, 13 years ago (diff)

Merging CSML-egged branch into trunk.

Line 
1#!python
2"""Bootstrap setuptools installation
3
4If you want to use setuptools in your package's setup.py, just include this
5file in the same directory with it, and add this to the top of your setup.py::
6
7    from ez_setup import use_setuptools
8    use_setuptools()
9
10If you want to require a specific version of setuptools, set a download
11mirror, or use an alternate download directory, you can do so by supplying
12the appropriate options to ``use_setuptools()``.
13
14This file can also be run as a script to install or upgrade setuptools.
15"""
16import sys
17DEFAULT_VERSION = "0.6c5"
18DEFAULT_URL     = "http://cheeseshop.python.org/packages/%s/s/setuptools/" % sys.version[:3]
19
20md5_data = {
21    'setuptools-0.6b1-py2.3.egg': '8822caf901250d848b996b7f25c6e6ca',
22    'setuptools-0.6b1-py2.4.egg': 'b79a8a403e4502fbb85ee3f1941735cb',
23    'setuptools-0.6b2-py2.3.egg': '5657759d8a6d8fc44070a9d07272d99b',
24    'setuptools-0.6b2-py2.4.egg': '4996a8d169d2be661fa32a6e52e4f82a',
25    'setuptools-0.6b3-py2.3.egg': 'bb31c0fc7399a63579975cad9f5a0618',
26    'setuptools-0.6b3-py2.4.egg': '38a8c6b3d6ecd22247f179f7da669fac',
27    'setuptools-0.6b4-py2.3.egg': '62045a24ed4e1ebc77fe039aa4e6f7e5',
28    'setuptools-0.6b4-py2.4.egg': '4cb2a185d228dacffb2d17f103b3b1c4',
29    'setuptools-0.6c1-py2.3.egg': 'b3f2b5539d65cb7f74ad79127f1a908c',
30    'setuptools-0.6c1-py2.4.egg': 'b45adeda0667d2d2ffe14009364f2a4b',
31    'setuptools-0.6c2-py2.3.egg': 'f0064bf6aa2b7d0f3ba0b43f20817c27',
32    'setuptools-0.6c2-py2.4.egg': '616192eec35f47e8ea16cd6a122b7277',
33    'setuptools-0.6c3-py2.3.egg': 'f181fa125dfe85a259c9cd6f1d7b78fa',
34    'setuptools-0.6c3-py2.4.egg': 'e0ed74682c998bfb73bf803a50e7b71e',
35    'setuptools-0.6c3-py2.5.egg': 'abef16fdd61955514841c7c6bd98965e',
36    'setuptools-0.6c4-py2.3.egg': 'b0b9131acab32022bfac7f44c5d7971f',
37    'setuptools-0.6c4-py2.4.egg': '2a1f9656d4fbf3c97bf946c0a124e6e2',
38    'setuptools-0.6c4-py2.5.egg': '8f5a052e32cdb9c72bcf4b5526f28afc',
39    'setuptools-0.6c5-py2.3.egg': 'ee9fd80965da04f2f3e6b3576e9d8167',
40    'setuptools-0.6c5-py2.4.egg': 'afe2adf1c01701ee841761f5bcd8aa64',
41    'setuptools-0.6c5-py2.5.egg': 'a8d3f61494ccaa8714dfed37bccd3d5d',
42}
43
44import sys, os
45
46def _validate_md5(egg_name, data):
47    if egg_name in md5_data:
48        from md5 import md5
49        digest = md5(data).hexdigest()
50        if digest != md5_data[egg_name]:
51            print >>sys.stderr, (
52                "md5 validation of %s failed!  (Possible download problem?)"
53                % egg_name
54            )
55            sys.exit(2)
56    return data
57
58
59def use_setuptools(
60    version=DEFAULT_VERSION, download_base=DEFAULT_URL, to_dir=os.curdir,
61    download_delay=15
62):
63    """Automatically find/download setuptools and make it available on sys.path
64
65    `version` should be a valid setuptools version number that is available
66    as an egg for download under the `download_base` URL (which should end with
67    a '/').  `to_dir` is the directory where setuptools will be downloaded, if
68    it is not already available.  If `download_delay` is specified, it should
69    be the number of seconds that will be paused before initiating a download,
70    should one be required.  If an older version of setuptools is installed,
71    this routine will print a message to ``sys.stderr`` and raise SystemExit in
72    an attempt to abort the calling script.
73    """
74    try:
75        import setuptools
76        if setuptools.__version__ == '0.0.1':
77            print >>sys.stderr, (
78            "You have an obsolete version of setuptools installed.  Please\n"
79            "remove it from your system entirely before rerunning this script."
80            )
81            sys.exit(2)
82    except ImportError:
83        egg = download_setuptools(version, download_base, to_dir, download_delay)
84        sys.path.insert(0, egg)
85        import setuptools; setuptools.bootstrap_install_from = egg
86
87    import pkg_resources
88    try:
89        pkg_resources.require("setuptools>="+version)
90
91    except pkg_resources.VersionConflict, e:
92        # XXX could we install in a subprocess here?
93        print >>sys.stderr, (
94            "The required version of setuptools (>=%s) is not available, and\n"
95            "can't be installed while this script is running. Please install\n"
96            " a more recent version first.\n\n(Currently using %r)"
97        ) % (version, e.args[0])
98        sys.exit(2)
99
100def download_setuptools(
101    version=DEFAULT_VERSION, download_base=DEFAULT_URL, to_dir=os.curdir,
102    delay = 15
103):
104    """Download setuptools from a specified location and return its filename
105
106    `version` should be a valid setuptools version number that is available
107    as an egg for download under the `download_base` URL (which should end
108    with a '/'). `to_dir` is the directory where the egg will be downloaded.
109    `delay` is the number of seconds to pause before an actual download attempt.
110    """
111    import urllib2, shutil
112    egg_name = "setuptools-%s-py%s.egg" % (version,sys.version[:3])
113    url = download_base + egg_name
114    saveto = os.path.join(to_dir, egg_name)
115    src = dst = None
116    if not os.path.exists(saveto):  # Avoid repeated downloads
117        try:
118            from distutils import log
119            if delay:
120                log.warn("""
121---------------------------------------------------------------------------
122This script requires setuptools version %s to run (even to display
123help).  I will attempt to download it for you (from
124%s), but
125you may need to enable firewall access for this script first.
126I will start the download in %d seconds.
127
128(Note: if this machine does not have network access, please obtain the file
129
130   %s
131
132and place it in this directory before rerunning this script.)
133---------------------------------------------------------------------------""",
134                    version, download_base, delay, url
135                ); from time import sleep; sleep(delay)
136            log.warn("Downloading %s", url)
137            src = urllib2.urlopen(url)
138            # Read/write all in one block, so we don't create a corrupt file
139            # if the download is interrupted.
140            data = _validate_md5(egg_name, src.read())
141            dst = open(saveto,"wb"); dst.write(data)
142        finally:
143            if src: src.close()
144            if dst: dst.close()
145    return os.path.realpath(saveto)
146
147def main(argv, version=DEFAULT_VERSION):
148    """Install or upgrade setuptools and EasyInstall"""
149
150    try:
151        import setuptools
152    except ImportError:
153        egg = None
154        try:
155            egg = download_setuptools(version, delay=0)
156            sys.path.insert(0,egg)
157            from setuptools.command.easy_install import main
158            return main(list(argv)+[egg])   # we're done here
159        finally:
160            if egg and os.path.exists(egg):
161                os.unlink(egg)
162    else:
163        if setuptools.__version__ == '0.0.1':
164            # tell the user to uninstall obsolete version
165            use_setuptools(version)
166
167    req = "setuptools>="+version
168    import pkg_resources
169    try:
170        pkg_resources.require(req)
171    except pkg_resources.VersionConflict:
172        try:
173            from setuptools.command.easy_install import main
174        except ImportError:
175            from easy_install import main
176        main(list(argv)+[download_setuptools(delay=0)])
177        sys.exit(0) # try to force an exit
178    else:
179        if argv:
180            from setuptools.command.easy_install import main
181            main(argv)
182        else:
183            print "Setuptools version",version,"or greater has been installed."
184            print '(Run "ez_setup.py -U setuptools" to reinstall or upgrade.)'
185
186
187
188def update_md5(filenames):
189    """Update our built-in md5 registry"""
190
191    import re
192    from md5 import md5
193
194    for name in filenames:
195        base = os.path.basename(name)
196        f = open(name,'rb')
197        md5_data[base] = md5(f.read()).hexdigest()
198        f.close()
199
200    data = ["    %r: %r,\n" % it for it in md5_data.items()]
201    data.sort()
202    repl = "".join(data)
203
204    import inspect
205    srcfile = inspect.getsourcefile(sys.modules[__name__])
206    f = open(srcfile, 'rb'); src = f.read(); f.close()
207
208    match = re.search("\nmd5_data = {\n([^}]+)}", src)
209    if not match:
210        print >>sys.stderr, "Internal error!"
211        sys.exit(2)
212
213    src = src[:match.start(1)] + repl + src[match.end(1):]
214    f = open(srcfile,'w')
215    f.write(src)
216    f.close()
217
218
219if __name__=='__main__':
220    if len(sys.argv)>2 and sys.argv[1]=='--md5update':
221        update_md5(sys.argv[2:])
222    else:
223        main(sys.argv[1:])
224
225
226
227
228
Note: See TracBrowser for help on using the repository browser.