Re: Commit/merge messages for binary files

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On Fri, Feb 18, 2011 at 10:42:42PM +0100, Piotr Krukowiecki wrote:

> Maybe I wasn't clear. Both the commit and the merge was for the same binary
> file.
> 
> In case of commit there were non-zero insertions/deletions. 
> See example below - notice both update binary file blob.o:
> 
> $ git commit -m Updated
> [topic 5da30ce] Updated
>  1 files changed, 8 insertions(+), 103 deletions(-)
>  rewrite blob.o (100%)

Yeah, that seems weird. I think it might have to do with break
detection in the diff, which is on during the commit summary diff:

  $ git init
  $ dd if=/dev/urandom of=foo.rand bs=1k count=4
  $ git add foo.rand
  $ git commit -m one
  [master (root-commit) 8c5783a] one
   1 files changed, 0 insertions(+), 0 deletions(-)
   create mode 100644 foo.rand
  $ git show --oneline --stat --summary
  8c5783a one
   foo.rand |  Bin 0 -> 4096 bytes
   1 files changed, 0 insertions(+), 0 deletions(-)
   create mode 100644 foo.rand

So far so good. Now let's rewrite it.

  $ dd if=/dev/urandom of=foo.rand bs=1k count=4
  $ git commit -a -m two
  [master 43961bc] two
   1 files changed, 15 insertions(+), 19 deletions(-)
   rewrite foo.rand (100%)

Now that seems wrong. What about doing another diff:

  $ git show --oneline --stat --summary
  43961bc two
   foo.rand |  Bin 4096 -> 4096 bytes
   1 files changed, 0 insertions(+), 0 deletions(-)

That's right. Now let's turn on break detection:

  $ git show --oneline --stat --summary -B
  43961bc two
   foo.rand |   34 +++++++++++++++-------------------
   1 files changed, 15 insertions(+), 19 deletions(-)
   rewrite foo.rand (100%)

Broken again. So I guess we have some problem with making sure we treat
broken filepairs as binary.

-Peff
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