Mercurial > cpython-lru_cache-weakref
annotate Demo/scripts/newslist.py @ 5817:48b94de85bf3 legacy-trunk
Extensive changes by AMK.
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Thu, 17 Jul 1997 16:29:42 +0000 |
| parents | 73758db2f464 |
| children | 5edfeb7aa6ea |
| rev | line source |
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/usr/local/bin/python -> /usr/bin/env python
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1 #! /usr/bin/env python |
| 1652 | 2 ####################################################################### |
| 3 # Newslist $Revision$ | |
| 4 # | |
| 5 # Syntax: | |
| 6 # newslist [ -a ] | |
| 7 # | |
| 8 # This is a program to create a directory full of HTML pages | |
| 9 # which between them contain links to all the newsgroups available | |
| 10 # on your server. | |
| 11 # | |
| 12 # The -a option causes a complete list of all groups to be read from | |
| 13 # the server rather than just the ones which have appeared since last | |
| 14 # execution. This recreates the local list from scratch. Use this on | |
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15 # the first invocation of the program, and from time to time thereafter. |
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16 # When new groups are first created they may appear on your server as |
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17 # empty groups. By default, empty groups are ignored by the -a option. |
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18 # However, these new groups will not be created again, and so will not |
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19 # appear in the server's list of 'new groups' at a later date. Hence it |
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20 # won't appear until you do a '-a' after some articles have appeared. |
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21 # |
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22 # I should really keep a list of ignored empty groups and re-check them |
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23 # for articles on every run, but I haven't got around to it yet. |
| 1652 | 24 # |
| 25 # This assumes an NNTP news feed. | |
| 26 # | |
| 27 # Feel free to copy, distribute and modify this code for | |
| 28 # non-commercial use. If you make any useful modifications, let me | |
| 29 # know! | |
| 30 # | |
| 31 # (c) Quentin Stafford-Fraser 1994 | |
| 32 # fraser@europarc.xerox.com qs101@cl.cam.ac.uk | |
| 33 # # | |
| 34 ####################################################################### | |
| 35 import sys,nntplib, string, marshal, time, os, posix, string | |
| 36 | |
| 37 ####################################################################### | |
| 38 # Check these variables before running! # | |
| 39 | |
| 40 # Top directory. | |
| 41 # Filenames which don't start with / are taken as being relative to this. | |
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42 topdir='/anfs/qsbigdisc/web/html/newspage' |
| 1652 | 43 |
| 44 # The name of your NNTP host | |
| 45 # eg. | |
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46 # newshost = 'nntp-serv.cl.cam.ac.uk' |
| 1652 | 47 # or use following to get the name from the NNTPSERVER environment |
| 48 # variable: | |
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49 # newshost = posix.environ['NNTPSERVER'] |
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50 newshost = 'nntp-serv.cl.cam.ac.uk' |
| 1652 | 51 |
| 52 # The filename for a local cache of the newsgroup list | |
| 53 treefile = 'grouptree' | |
| 54 | |
| 55 # The filename for descriptions of newsgroups | |
| 56 # I found a suitable one at ftp.uu.net in /uunet-info/newgroups.gz | |
| 57 # You can set this to '' if you don't wish to use one. | |
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58 descfile = 'newsgroups' |
| 1652 | 59 |
| 60 # The directory in which HTML pages should be created | |
| 61 # eg. | |
| 62 # pagedir = '/usr/local/lib/html/newspage' | |
| 63 # pagedir = 'pages' | |
| 64 pagedir = topdir | |
| 65 | |
| 66 # The html prefix which will refer to this directory | |
| 67 # eg. | |
| 68 # httppref = '/newspage/', | |
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69 # or leave blank for relative links between pages: (Recommended) |
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70 # httppref = '' |
| 1652 | 71 httppref = '' |
| 72 | |
| 73 # The name of the 'root' news page in this directory. | |
| 74 # A .html suffix will be added. | |
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75 rootpage = 'root' |
| 1652 | 76 |
| 77 # Set skipempty to 0 if you wish to see links to empty groups as well. | |
| 78 # Only affects the -a option. | |
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79 skipempty = 1 |
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80 |
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81 # pagelinkicon can contain html to put an icon after links to |
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82 # further pages. This helps to make important links stand out. |
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83 # Set to '' if not wanted, or '...' is quite a good one. |
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84 pagelinkicon='... <img src="http://pelican.cl.cam.ac.uk/icons/page.xbm"> ' |
| 1652 | 85 |
| 86 # --------------------------------------------------------------------- | |
| 87 # Less important personal preferences: | |
| 88 | |
| 89 # Sublistsize controls the maximum number of items the will appear as | |
| 90 # an indented sub-list before the whole thing is moved onto a different | |
| 91 # page. The smaller this is, the more pages you will have, but the | |
| 92 # shorter each will be. | |
| 93 sublistsize = 4 | |
| 94 | |
| 95 # That should be all. # | |
| 96 ####################################################################### | |
| 97 | |
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98 for dir in os.curdir, os.environ['HOME']: |
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99 rcfile = os.path.join(dir, '.newslistrc.py') |
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100 if os.path.exists(rcfile): |
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101 print rcfile |
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102 execfile(rcfile) |
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103 break |
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104 |
| 1652 | 105 from nntplib import NNTP |
| 106 from stat import * | |
| 107 | |
| 108 rcsrev = '$Revision$'[11:15] | |
| 109 desc = {} | |
| 110 | |
| 111 # Make (possibly) relative filenames into absolute ones | |
| 112 treefile = os.path.join(topdir,treefile) | |
| 113 descfile = os.path.join(topdir,descfile) | |
| 114 page = os.path.join(topdir,pagedir) | |
| 115 | |
| 116 # First the bits for creating trees --------------------------- | |
| 117 | |
| 118 # Addtotree creates/augments a tree from a list of group names | |
| 119 def addtotree(tree, groups): | |
| 120 print 'Updating tree...' | |
| 121 for i in groups: | |
| 122 parts = string.splitfields(i,'.') | |
| 123 makeleaf(tree, parts) | |
| 124 | |
| 125 # Makeleaf makes a leaf and the branch leading to it if necessary | |
| 126 def makeleaf(tree,path): | |
| 127 j = path[0] | |
| 128 l = len(path) | |
| 129 | |
| 130 if not tree.has_key(j): | |
| 131 tree[j] = {} | |
| 132 if l == 1: | |
| 133 tree[j]['.'] = '.' | |
| 134 if l > 1: | |
| 135 makeleaf(tree[j],path[1:]) | |
| 136 | |
| 137 # Then the bits for outputting trees as pages ---------------- | |
| 138 | |
| 139 # Createpage creates an HTML file named <root>.html containing links | |
| 140 # to those groups beginning with <root>. | |
| 141 | |
| 142 def createpage(root, tree, p): | |
| 143 filename = os.path.join(pagedir,root+'.html') | |
| 144 if root == rootpage: | |
| 145 detail = '' | |
| 146 else: | |
| 147 detail = ' under ' + root | |
| 148 f = open(filename,'w') | |
| 149 # f.write('Content-Type: text/html\n') | |
| 150 f.write('<TITLE>Newsgroups available' + detail + '</TITLE>\n') | |
| 151 f.write('<H1>Newsgroups available' + detail +'</H1>\n') | |
| 152 f.write('<A HREF="'+httppref+rootpage+'.html">Back to top level</A><P>\n') | |
| 153 printtree(f,tree,0,p) | |
| 154 f.write('<I>This page automatically created by \'newslist\' v. '+rcsrev+'.') | |
| 155 f.write(time.ctime(time.time()) + '</I><P>') | |
| 156 f.close() | |
| 157 | |
| 158 # Printtree prints the groups as a bulleted list. Groups with | |
| 159 # more than <sublistsize> subgroups will be put on a separate page. | |
| 160 # Other sets of subgroups are just indented. | |
| 161 | |
| 162 def printtree(f, tree, indent, p): | |
| 163 global desc | |
| 164 l = len(tree) | |
| 165 | |
| 166 if l > sublistsize and indent>0: | |
| 167 # Create a new page and a link to it | |
| 168 f.write('<LI><B><A HREF="'+httppref+p[1:]+'.html">') | |
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169 f.write(p[1:]+'.*') |
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170 f.write('</A></B>'+pagelinkicon+'\n') |
| 1652 | 171 createpage(p[1:], tree, p) |
| 172 return | |
| 173 | |
| 174 kl = tree.keys() | |
| 175 | |
| 176 if l > 1: | |
| 177 kl.sort() | |
| 178 if indent > 0: | |
| 179 # Create a sub-list | |
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180 f.write('<LI>'+p[1:]+'\n<UL>') |
| 1652 | 181 else: |
| 182 # Create a main list | |
| 183 f.write('<UL>') | |
| 184 indent = indent + 1 | |
| 185 | |
| 186 for i in kl: | |
| 187 if i == '.': | |
| 188 # Output a newsgroup | |
| 189 f.write('<LI><A HREF="news:' + p[1:] + '">'+ p[1:] + '</A> ') | |
| 190 if desc.has_key(p[1:]): | |
| 191 f.write(' <I>'+desc[p[1:]]+'</I>\n') | |
| 192 else: | |
| 193 f.write('\n') | |
| 194 else: | |
| 195 # Output a hierarchy | |
| 196 printtree(f,tree[i], indent, p+'.'+i) | |
| 197 | |
| 198 if l > 1: | |
| 199 f.write('\n</UL>') | |
| 200 | |
| 201 # Reading descriptions file --------------------------------------- | |
| 202 | |
| 203 # This returns an array mapping group name to its description | |
| 204 | |
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205 def readdesc(descfile): |
| 1652 | 206 global desc |
| 207 | |
| 208 desc = {} | |
| 209 | |
| 210 if descfile == '': | |
| 211 return | |
| 212 | |
| 213 try: | |
| 214 d = open(descfile, 'r') | |
| 215 print 'Reading descriptions...' | |
| 216 except (IOError): | |
| 217 print 'Failed to open description file ' + descfile | |
| 218 return | |
| 219 l = d.readline() | |
| 220 while l != '': | |
| 221 bits = string.split(l) | |
| 222 try: | |
| 223 grp = bits[0] | |
| 224 dsc = string.join(bits[1:]) | |
| 225 if len(dsc)>1: | |
| 226 desc[grp] = dsc | |
| 227 except (IndexError): | |
| 228 pass | |
| 229 l = d.readline() | |
| 230 | |
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231 # Check that ouput directory exists, ------------------------------ |
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232 # and offer to create it if not |
| 1652 | 233 |
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234 def checkopdir(pagedir): |
| 1652 | 235 if not os.path.isdir(pagedir): |
| 236 print 'Directory '+pagedir+' does not exist.' | |
| 237 print 'Shall I create it for you? (y/n)' | |
| 238 if sys.stdin.readline()[0] == 'y': | |
| 239 try: | |
| 240 os.mkdir(pagedir,0777) | |
| 241 except: | |
| 242 print 'Sorry - failed!' | |
| 243 sys.exit(1) | |
| 244 else: | |
| 245 print 'OK. Exiting.' | |
| 246 sys.exit(1) | |
| 247 | |
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248 # Read and write current local tree ---------------------------------- |
| 1652 | 249 |
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250 def readlocallist(treefile): |
| 1652 | 251 print 'Reading current local group list...' |
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252 tree = {} |
| 1652 | 253 try: |
| 254 treetime = time.localtime(os.stat(treefile)[ST_MTIME]) | |
| 255 except: | |
| 256 print '\n*** Failed to open local group cache '+treefile | |
| 257 print 'If this is the first time you have run newslist, then' | |
| 258 print 'use the -a option to create it.' | |
| 259 sys.exit(1) | |
| 260 treedate = '%02d%02d%02d' % (treetime[0] % 100 ,treetime[1], treetime[2]) | |
| 261 try: | |
| 262 dump = open(treefile,'r') | |
| 263 tree = marshal.load(dump) | |
| 264 dump.close() | |
| 265 except (IOError): | |
| 266 print 'Cannot open local group list ' + treefile | |
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267 return (tree, treedate) |
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268 |
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269 def writelocallist(treefile, tree): |
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270 try: |
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271 dump = open(treefile,'w') |
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272 groups = marshal.dump(tree,dump) |
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273 dump.close() |
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274 print 'Saved list to '+treefile+'\n' |
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275 except: |
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276 print 'Sorry - failed to write to local group cache '+treefile |
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277 print 'Does it (or its directory) have the correct permissions?' |
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278 sys.exit(1) |
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279 |
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280 # Return list of all groups on server ----------------------------- |
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281 |
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282 def getallgroups(server): |
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283 print 'Getting list of all groups...' |
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284 treedate='010101' |
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285 info = server.list()[1] |
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286 groups = [] |
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287 print 'Processing...' |
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288 if skipempty: |
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289 print '\nIgnoring following empty groups:' |
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290 for i in info: |
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291 grpname = string.split(i[0])[0] |
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292 if skipempty and string.atoi(i[1]) < string.atoi(i[2]): |
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293 print grpname+' ', |
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294 else: |
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295 groups.append(grpname) |
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296 print '\n' |
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297 if skipempty: |
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298 print '(End of empty groups)' |
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299 return groups |
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300 |
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301 # Return list of new groups on server ----------------------------- |
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302 |
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303 def getnewgroups(server, treedate): |
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304 print 'Getting list of new groups since start of '+treedate+'...', |
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305 info = server.newgroups(treedate,'000001')[1] |
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306 print 'got '+`len(info)`+'.' |
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307 print 'Processing...', |
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308 groups = [] |
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309 for i in info: |
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310 grpname = string.split(i)[0] |
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311 groups.append(grpname) |
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312 print 'Done' |
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313 return groups |
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314 |
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315 # Now the main program -------------------------------------------- |
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316 |
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317 def main(): |
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318 global desc |
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319 |
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320 tree={} |
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321 |
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322 # Check that the output directory exists |
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323 checkopdir(pagedir); |
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324 |
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325 try: |
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326 print 'Connecting to '+newshost+'...' |
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327 if sys.version[0] == '0': |
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328 s = NNTP.init(newshost) |
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329 else: |
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330 s = NNTP(newshost) |
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331 connected = 1 |
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332 except (nntplib.error_temp, nntplib.error_perm), x: |
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333 print 'Error connecting to host:', x |
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334 print 'I\'ll try to use just the local list.' |
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335 connected = 0 |
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336 |
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337 # If -a is specified, read the full list of groups from server |
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338 if connected and len(sys.argv) > 1 and sys.argv[1] == '-a': |
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339 |
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340 groups = getallgroups(s) |
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341 |
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342 # Otherwise just read the local file and then add |
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343 # groups created since local file last modified. |
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344 else: |
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345 |
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346 (tree, treedate) = readlocallist(treefile) |
| 1652 | 347 if connected: |
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348 groups = getnewgroups(s, treedate) |
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349 |
| 1652 | 350 if connected: |
| 351 addtotree(tree, groups) | |
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352 writelocallist(treefile,tree) |
| 1652 | 353 |
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354 # Read group descriptions |
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355 readdesc(descfile) |
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356 |
| 1652 | 357 print 'Creating pages...' |
| 358 createpage(rootpage, tree, '') | |
| 359 print 'Done' | |
| 360 | |
| 361 | |
| 362 main() | |
| 363 | |
| 364 # That's all folks | |
| 365 ###################################################################### |