# 
# 
# patch "viewmtn.py"
#  from [7a151db43bc8aef575ac63d8510c0b93867c89c2]
#    to [b7505915964d790e9c43161a9997245a5a8c5610]
# 
============================================================
--- viewmtn.py	7a151db43bc8aef575ac63d8510c0b93867c89c2
+++ viewmtn.py	b7505915964d790e9c43161a9997245a5a8c5610
@@ -1,17 +1,21 @@
 #!/usr/bin/env python2.4
 
+import os
 import cgi
 import mtn
 import sys
 import web
+import struct
 import rfc822
 import config
 import common
 import urllib
 import urlparse
 import syntax
+import tarfile
 import tempfile
 import datetime
+import cStringIO
 hq = cgi.escape
 
 import web
@@ -61,6 +65,13 @@ def quicklog(changelog, max_size=None):
         interesting_line += '..'
     return interesting_line
 
+def timecert(certs):
+    revdate = None
+    for cert in certs:
+        if cert[4] == 'name' and cert[5] == 'date':
+            revdate = common.parse_timecert(cert[7])
+    return revdate
+
 def nbhq(s):
     return ' '.join([hq(t) for t in s.split(' ')])
 
@@ -152,7 +163,6 @@ class FileLink(Link):
 class FileLink(Link):
     def __init__(self, file, **kwargs):
         Link.__init__(*(self, ), **kwargs)
-        debug(kwargs)
         if kwargs.has_key('for_download'):
             access_method = 'downloadfile'
         else:
@@ -505,6 +515,45 @@ class RevisionDownloadFile(RevisionPage)
             sys.stdout.write(data)
         sys.stdout.flush()
 
+class RevisionTar:
+    def GET(self, revision):
+        # we'll output in the USTAR tar format; documentation taken from:
+        # http://en.wikipedia.org/wiki/Tar_%28file_format%29
+        revision = mtn.Revision(revision)
+        manifest = [stanza for stanza in ops.get_manifest_of(revision)]
+        # for now; we might want to come up with something more interesting; 
+        # maybe the branch name (but there might be multiple branches?)
+        basedirname = revision
+        tarobj = tarfile.open(mode="w", fileobj=sys.stdout)
+        dir_mode, file_mode = "0700", "0600"
+        certs = {}
+        for stanza in manifest:
+            stanza_type = stanza[0]
+            if stanza_type != 'file':
+                continue
+            filename, fileid = stanza[1], stanza[3]
+            filecontents = cStringIO.StringIO()
+            filesize = 0
+            for data in ops.get_file(fileid):
+                filesize += len(data)
+                filecontents.write(data)
+            ti = tarfile.TarInfo()
+            ti.name = os.path.join(revision, filename)
+            ti.mode, ti.type = 00600, tarfile.REGTYPE
+            ti.uid = ti.gid = 0
+            # determine the most recent of the content marks
+            content_marks = [t[1] for t in ops.get_content_changed(revision, filename)]
+            if len(content_marks) > 0:
+                # just pick one to make this faster
+                content_mark = content_marks[0]
+                since_epoch = timecert(ops.certs(content_mark)) - datetime.datetime.fromtimestamp(0)
+                ti.mtime = since_epoch.days * 24 * 60 * 60 + since_epoch.seconds
+            else:
+                ti.mtime = 0
+            ti.size = filesize
+            filecontents.seek(0)
+            tarobj.addfile(ti, filecontents)
+
 class RevisionBrowse(RevisionPage):
     def GET(self, revision, path):
         revision = mtn.Revision(revision)
@@ -574,11 +623,6 @@ class RevisionBrowse(RevisionPage):
                     yield (stanza_type, this_path)
 
         def info_for_manifest(entry_iter):
-            def timecert(certs):
-                for cert in certs:
-                    if cert[4] == 'name' and cert[5] == 'date':
-                        revdate = common.parse_timecert(cert[7])
-
             # should probably limit memory usage (worst case is this gets huge)
             # but for now, this is really a needed optimisation, as most of the 
             # time a single cert will be seen *many* times
@@ -617,7 +661,7 @@ class RevisionBrowse(RevisionPage):
                 # determine the most recent of the content marks
                 content_marks = [t[1] for t in ops.get_content_changed(revision, this_path)]
                 for mark in content_marks:
-                    certs[mark] = get_cert(mark)
+                    get_cert(mark)
                 if len(content_marks):
                     content_marks.sort(lambda b, a: cmp(timecert(certs[a]), timecert(certs[b])))
                     content_mark = mtn.Revision(content_marks[0])
@@ -653,11 +697,6 @@ class RevisionBrowse(RevisionPage):
                         row_class=row_class(),
                         entries=info_for_manifest(cut_manifest_to_subdir()))
 
-class RevisionTar:
-    def GET(self, revision):
-        revision = mtn.Revision(revision)
-        print "not implemented"
-
 class RevisionGraph:
     def GET(self, revision, revision_count=10):