convert/mtn: allow monotone database files as sources

hgext/convert/monotone.py

@@ -1,202 +1,208 b''
 # monotone support for the convert extension
 
 import os, re
 from mercurial import util
 from common import NoRepo, commit, converter_source, checktool
 from common import commandline
 from mercurial.i18n import _
 
 class monotone_source(converter_source, commandline):
     def __init__(self, ui, path=None, rev=None):
         converter_source.__init__(self, ui, path, rev)
         commandline.__init__(self, ui, 'mtn')
 
         self.ui = ui
         self.path = path
 
         norepo = NoRepo (_("%s does not look like a monotone repo") % path)
         if not os.path.exists(os.path.join(path, '_MTN')):
-            raise norepo
+            # Could be a monotone repository (SQLite db file)
+            try:
+                header = file(path, 'rb').read(16)
+            except:
+                header = ''
+            if header != 'SQLite format 3\x00':
+                raise norepo
 
         # regular expressions for parsing monotone output
         space    = r'\s*'
         name     = r'\s+"((?:\\"|[^"])*)"\s*'
         value    = name
         revision = r'\s+\[(\w+)\]\s*'
         lines    = r'(?:.|\n)+'
 
         self.dir_re      = re.compile(space + "dir" + name)
         self.file_re     = re.compile(space + "file" + name + "content" + revision)
         self.add_file_re = re.compile(space + "add_file" + name + "content" + revision)
         self.patch_re    = re.compile(space + "patch" + name + "from" + revision + "to" + revision)
         self.rename_re   = re.compile(space + "rename" + name + "to" + name)
         self.delete_re   = re.compile(space + "delete" + name)
         self.tag_re      = re.compile(space + "tag" + name + "revision" + revision)
         self.cert_re     = re.compile(lines + space + "name" + name + "value" + value)
 
         attr = space + "file" + lines + space + "attr" + space
         self.attr_execute_re = re.compile(attr  + '"mtn:execute"' + space + '"true"')
 
         # cached data
         self.manifest_rev = None
         self.manifest = None
         self.files = None
         self.dirs  = None
 
         checktool('mtn', abort=False)
 
         # test if there are any revisions
         self.rev = None
         try:
             self.getheads()
         except:
             raise norepo
         self.rev = rev
 
     def mtnrun(self, *args, **kwargs):
         kwargs['d'] = self.path
         return self.run0('automate', *args, **kwargs)
 
     def mtnloadmanifest(self, rev):
         if self.manifest_rev == rev:
             return
         self.manifest = self.mtnrun("get_manifest_of", rev).split("\n\n")
         self.manifest_rev = rev
         self.files = {}
         self.dirs = {}
 
         for e in self.manifest:
             m = self.file_re.match(e)
             if m:
                 attr = ""
                 name = m.group(1)
                 node = m.group(2)
                 if self.attr_execute_re.match(e):
                     attr += "x"
                 self.files[name] = (node, attr)
             m = self.dir_re.match(e)
             if m:
                 self.dirs[m.group(1)] = True
 
     def mtnisfile(self, name, rev):
         # a non-file could be a directory or a deleted or renamed file
         self.mtnloadmanifest(rev)
         try:
             self.files[name]
             return True
         except KeyError:
             return False
 
     def mtnisdir(self, name, rev):
         self.mtnloadmanifest(rev)
         try:
             self.dirs[name]
             return True
         except KeyError:
             return False
 
     def mtngetcerts(self, rev):
         certs = {"author":"<missing>", "date":"<missing>",
             "changelog":"<missing>", "branch":"<missing>"}
         cert_list = self.mtnrun("certs", rev).split('\n\n      key "')
         for e in cert_list:
             m = self.cert_re.match(e)
             if m:
                 name, value = m.groups()
                 value = value.replace(r'\"', '"')
                 value = value.replace(r'\\', '\\')
                 certs[name] = value
         return certs
 
     def mtnrenamefiles(self, files, fromdir, todir):
         renamed = {}
         for tofile in files:
             if tofile.startswith(todir + '/'):
                 renamed[tofile] = fromdir + tofile[len(todir):]
         return renamed
 
     # implement the converter_source interface:
 
     def getheads(self):
         if not self.rev:
             return self.mtnrun("leaves").splitlines()
         else:
             return [self.rev]
 
     def getchanges(self, rev):
         #revision = self.mtncmd("get_revision %s" % rev).split("\n\n")
         revision = self.mtnrun("get_revision", rev).split("\n\n")
         files = {}
         copies = {}
         for e in revision:
             m = self.add_file_re.match(e)
             if m:
                 files[m.group(1)] = rev
             m = self.patch_re.match(e)
             if m:
                 files[m.group(1)] = rev
 
             # Delete/rename is handled later when the convert engine
             # discovers an IOError exception from getfile,
             # but only if we add the "from" file to the list of changes.
             m = self.delete_re.match(e)
             if m:
                 files[m.group(1)] = rev
             m = self.rename_re.match(e)
             if m:
                 toname = m.group(2)
                 fromname = m.group(1)
                 if self.mtnisfile(toname, rev):
                     copies[toname] = fromname
                     files[toname] = rev
                     files[fromname] = rev
                 if self.mtnisdir(toname, rev):
                     renamed = self.mtnrenamefiles(self.files, fromname, toname)
                     for tofile, fromfile in renamed.items():
                         self.ui.debug (_("copying file in renamed directory "
                                          "from '%s' to '%s'")
                                        % (fromfile, tofile), '\n')
                         files[tofile] = rev
                         copies[tofile] = fromfile
                     for fromfile in renamed.values():
                         files[fromfile] = rev
         return (files.items(), copies)
 
     def getmode(self, name, rev):
         self.mtnloadmanifest(rev)
         try:
             node, attr = self.files[name]
             return attr
         except KeyError:
             return ""
 
     def getfile(self, name, rev):
         if not self.mtnisfile(name, rev):
             raise IOError() # file was deleted or renamed
         try:
             return self.mtnrun("get_file_of", name, r=rev)
         except:
             raise IOError() # file was deleted or renamed
 
     def getcommit(self, rev):
         certs   = self.mtngetcerts(rev)
         return commit(
             author=certs["author"],
             date=util.datestr(util.strdate(certs["date"], "%Y-%m-%dT%H:%M:%S")),
             desc=certs["changelog"],
             rev=rev,
             parents=self.mtnrun("parents", rev).splitlines(),
             branch=certs["branch"])
 
     def gettags(self):
         tags = {}
         for e in self.mtnrun("tags").split("\n\n"):
             m = self.tag_re.match(e)
             if m:
                 tags[m.group(1)] = m.group(2)
         return tags
 
     def getchangedfiles(self, rev, i):
         # This function is only needed to support --filemap
         # ... and we don't support that
         raise NotImplementedError()