[StGIT PATCH 5/5] Add --binary flag to commands that generate diffs

["Karl Hasselström" <kha@treskal.com>]

This just passes the --binary option to git-diff-*, which causes the
generated diffs to contain an applyable diff even when binary files
differ. It's necessary to do this if you want to mail patches to
binary files.

Signed-off-by: Karl Hasselström <kha@treskal.com>
---

 stgit/commands/diff.py   |    6 +++++-
 stgit/commands/export.py |    5 ++++-
 stgit/commands/mail.py   |    6 +++++-
 stgit/git.py             |   16 ++++++++++++----
 4 files changed, 26 insertions(+), 7 deletions(-)

diff --git a/stgit/commands/diff.py b/stgit/commands/diff.py
index 8678a0a..d3e1190 100644
--- a/stgit/commands/diff.py
+++ b/stgit/commands/diff.py
@@ -44,6 +44,9 @@ shows the specified patch (defaulting to the current one)."""
 options = [make_option('-r', '--range',
                        metavar = 'rev1[..[rev2]]', dest = 'revs',
                        help = 'show the diff between revisions'),
+           make_option('--binary',
+                       help = 'output a diff even for binary files',
+                       action = 'store_true'),
            make_option('-s', '--stat',
                        help = 'show the stat instead of the diff',
                        action = 'store_true')]
@@ -79,6 +82,7 @@ def func(parser, options, args):
     if options.stat:
         print git.diffstat(args, git_id(rev1), git_id(rev2))
     else:
-        diff_str = git.diff(args, git_id(rev1), git_id(rev2))
+        diff_str = git.diff(args, git_id(rev1), git_id(rev2),
+                            binary = options.binary)
         if diff_str:
             pager(diff_str)
diff --git a/stgit/commands/export.py b/stgit/commands/export.py
index 79b8630..20d8f67 100644
--- a/stgit/commands/export.py
+++ b/stgit/commands/export.py
@@ -62,6 +62,9 @@ options = [make_option('-d', '--dir',
                        help = 'Use FILE as a template'),
            make_option('-b', '--branch',
                        help = 'use BRANCH instead of the default one'),
+           make_option('--binary',
+                       help = 'output a diff even for binary files',
+                       action = 'store_true'),
            make_option('-s', '--stdout',
                        help = 'dump the patches to the standard output',
                        action = 'store_true')]
@@ -172,7 +175,7 @@ def func(parser, options, args):
         # write the diff
         git.diff(rev1 = patch.get_bottom(),
                  rev2 = patch.get_top(),
-                 out_fd = f)
+                 out_fd = f, binary = options.binary)
         if not options.stdout:
             f.close()
         patch_no += 1
diff --git a/stgit/commands/mail.py b/stgit/commands/mail.py
index 151a408..2fcaa5f 100644
--- a/stgit/commands/mail.py
+++ b/stgit/commands/mail.py
@@ -120,6 +120,9 @@ options = [make_option('-a', '--all',
                        help = 'username for SMTP authentication'),
            make_option('-b', '--branch',
                        help = 'use BRANCH instead of the default one'),
+           make_option('--binary',
+                       help = 'output a diff even for binary files',
+                       action = 'store_true'),
            make_option('-m', '--mbox',
                        help = 'generate an mbox file instead of sending',
                        action = 'store_true')]
@@ -390,7 +393,8 @@ def __build_message(tmpl, patch, patch_nr, total_nr, msg_id, ref_id, options):
                  # for backward template compatibility
                  'endofheaders': '',
                  'diff':         git.diff(rev1 = git_id('%s//bottom' % patch),
-                                          rev2 = git_id('%s//top' % patch)),
+                                          rev2 = git_id('%s//top' % patch),
+                                          binary = options.binary),
                  'diffstat':     git.diffstat(rev1 = git_id('%s//bottom'%patch),
                                               rev2 = git_id('%s//top' % patch)),
                  # for backward template compatibility
diff --git a/stgit/git.py b/stgit/git.py
index 837f927..86630ce 100644
--- a/stgit/git.py
+++ b/stgit/git.py
@@ -771,20 +771,28 @@ def status(files = None, modified = False, new = False, deleted = False,
         else:
             print '%s' % fs[1]
 
-def diff(files = None, rev1 = 'HEAD', rev2 = None, out_fd = None):
+def diff(files = None, rev1 = 'HEAD', rev2 = None, out_fd = None,
+         binary = False):
     """Show the diff between rev1 and rev2
     """
     if not files:
         files = []
 
+    args = []
+    if binary:
+        args.append('--binary')
+
     if rev1 and rev2:
-        diff_str = _output(['git-diff-tree', '-p', rev1, rev2, '--'] + files)
+        diff_str = _output(['git-diff-tree', '-p'] + args
+                           + [rev1, rev2, '--'] + files)
     elif rev1 or rev2:
         refresh_index()
         if rev2:
-            diff_str = _output(['git-diff-index', '-p', '-R', rev2, '--'] + files)
+            diff_str = _output(['git-diff-index', '-p', '-R']
+                               + args + [rev2, '--'] + files)
         else:
-            diff_str = _output(['git-diff-index', '-p', rev1, '--'] + files)
+            diff_str = _output(['git-diff-index', '-p']
+                               + args + [rev1, '--'] + files)
     else:
         diff_str = ''