[U-Boot] [PATCH] patman: Check commit_match before stripping leading whitespace

[Scott Wood]

On Sun, 2014-09-28 at 12:04 -0600, Simon Glass wrote:
> Hi Scott,
> 
> On 25 September 2014 13:30, Scott Wood <scottwood at freescale.com> wrote:
> > True commit lines start at column zero.  Anything that is indented
> > is part of the commit message instead.  I noticed this by trying to
> > run buildman with commit e3a4facdfc07179ebe017a07b8de6224a935a9f3
> > as master, which contained a reference to a Linux commit inside
> > the commit message.  ProcessLine saw that as a genuite commit
> > line, and thus buildman tried to build it, and died with an
> > exception because that SHA is not present in the U-Boot tree.
> >
> > Signed-off-by: Scott Wood <scottwood at freescale.com>
> > ---
> >  tools/patman/patchstream.py | 4 +++-
> >  1 file changed, 3 insertions(+), 1 deletion(-)
> >
> > diff --git a/tools/patman/patchstream.py b/tools/patman/patchstream.py
> > index d630157..68e98b9 100644
> > --- a/tools/patman/patchstream.py
> > +++ b/tools/patman/patchstream.py
> > @@ -139,6 +139,9 @@ class PatchStream:
> >          # Initially we have no output. Prepare the input line string
> >          out = []
> >          line = line.rstrip('\n')
> > +
> > +        commit_match = re_commit.match(line) if self.is_log else None
> > +
> >          if self.is_log:
> >              if line[:4] == '    ':
> >                  line = line[4:]
> > @@ -146,7 +149,6 @@ class PatchStream:
> >          # Handle state transition and skipping blank lines
> >          series_tag_match = re_series_tag.match(line)
> >          commit_tag_match = re_commit_tag.match(line)
> > -        commit_match = re_commit.match(line) if self.is_log else None
> >          cover_cc_match = re_cover_cc.match(line)
> >          signoff_match = re_signoff.match(line)
> >          tag_match = None
> > --
> > 1.9.1
> >
> 
> Thanks for finding this bug.
> 
> This could use a test in tools/patman/test.py
> 
> The problem is that you are breaking the patch-processing part of this
> code. It operates in two modes - see the comment at the top of
> ProcessLine(). With your change it will not process patches correctly,
> e.g. to add Commit-notes: to the patch.

How would this patch would make any difference in the "self.is_log ==
False" case?  The whitespace removal that this patch reorders around
won't be executed, and commit_match will be None regardless.

-Scott