convert-srcuri.py: use regex to check space in SRC_URI

There may be none, one or more spaces including tab before backslash in
SRC_URI. Use regex to check and update. It helps to avoid malformed uri
such as recipe open-iscsi-user in meta-openstack:

SRC_URI = "git://github.com/open-iscsi/open-iscsi.git;protocol=https  ;branch=master \

And help to check more recipes such as concurrent-ruby in the same
layer:

SRC_URI = "git://github.com/ruby-concurrency/concurrent-ruby.git;protocol=https;tag=v1.1.6\

(From OE-Core rev: a69a53573b1987ee5834a6fc27763f9bbf5fe5a4)

Signed-off-by: Kai Kang <kai.kang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/contrib/convert-srcuri.py

@@ -35,16 +35,16 @@ def processfile(fn):
                     if ("git://" in line or "gitsm://" in line) and "branch=" not in line and matchline(line):
                         if line.endswith('"\n'):
                             line = line.replace('"\n', ';branch=master"\n')
-                        elif line.endswith(" \\\n"):
-                            line = line.replace(' \\\n', ';branch=master \\\n')
+                        elif re.search('\s*\\\\$', line):
+                            line = re.sub('\s*\\\\$', ';branch=master \\\\', line)
                         modified = True
                     if ("git://" in line or "gitsm://" in line) and "github.com" in line and "protocol=https" not in line and matchline(line):
                         if "protocol=git" in line:
                             line = line.replace('protocol=git', 'protocol=https')
                         elif line.endswith('"\n'):
                             line = line.replace('"\n', ';protocol=https"\n')
-                        elif line.endswith(" \\\n"):
-                            line = line.replace(' \\\n', ';protocol=https \\\n')
+                        elif re.search('\s*\\\\$', line):
+                            line = re.sub('\s*\\\\$', ';protocol=https \\\\', line)
                         modified = True
                     new_file.write(line)
         if modified: