Merge branch 'git-p4' of git://repo.or.cz/git/git-p4

* 'git-p4' of git://repo.or.cz/git/git-p4:
  git-p4: Use P4EDITOR environment variable when set
  git-p4: Unset P4DIFF environment variable when using 'p4 -du diff'
  git-p4: Optimize the fetching of data from perforce.

contrib/fast-import/git-p4

@@ -627,6 +627,8 @@ class P4Submit(Command):
 
         if self.interactive:
             submitTemplate = self.prepareLogMessage(template, logMessage)
+            if os.environ.has_key("P4DIFF"):
+                del(os.environ["P4DIFF"])
             diff = read_pipe("p4 diff -du ...")
 
             for newFile in filesToAdd:
@@ -650,7 +652,10 @@ class P4Submit(Command):
             defaultEditor = "vi"
             if platform.system() == "Windows":
                 defaultEditor = "notepad"
-            editor = os.environ.get("EDITOR", defaultEditor);
+            if os.environ.has_key("P4EDITOR"):
+                editor = os.environ.get("P4EDITOR")
+            else:
+                editor = os.environ.get("EDITOR", defaultEditor);
             system(editor + " " + fileName)
             tmpFile = open(fileName, "rb")
             message = tmpFile.read()
@@ -882,21 +887,21 @@ class P4Sync(Command):
         while j < len(filedata):
             stat = filedata[j]
             j += 1
-            text = ''
+            text = [];
             while j < len(filedata) and filedata[j]['code'] in ('text', 'unicode', 'binary'):
-                tmp = filedata[j]['data']
-                if stat['type'] in ('text+ko', 'unicode+ko', 'binary+ko'):
-                    tmp = re.sub(r'(?i)\$(Id|Header):[^$]*\$',r'$\1$', tmp)
-                elif stat['type'] in ('text+k', 'ktext', 'kxtext', 'unicode+k', 'binary+k'):
-                    tmp = re.sub(r'(?i)\$(Id|Header|Author|Date|DateTime|Change|File|Revision):[^$]*\$',r'$\1$', tmp)
-                text += tmp
+                text.append(filedata[j]['data'])
                 j += 1
-
+            text = ''.join(text)
 
             if not stat.has_key('depotFile'):
                 sys.stderr.write("p4 print fails with: %s\n" % repr(stat))
                 continue
 
+            if stat['type'] in ('text+ko', 'unicode+ko', 'binary+ko'):
+                text = re.sub(r'(?i)\$(Id|Header):[^$]*\$',r'$\1$', text)
+            elif stat['type'] in ('text+k', 'ktext', 'kxtext', 'unicode+k', 'binary+k'):
+                text = re.sub(r'(?i)\$(Id|Header|Author|Date|DateTime|Change|File|Revision):[^$]*\$',r'$\1$', text)
+
             contents[stat['depotFile']] = text
 
         for f in filesForCommit: