Merge lt/revlist,jc/diff,jc/revparse,jc/abbrev

Documentation/git-rev-list.txt

@@ -14,6 +14,7 @@ SYNOPSIS
 	     [ \--min-age=timestamp ]
 	     [ \--sparse ]
 	     [ \--no-merges ]
+	     [ \--remove-empty ]
 	     [ \--all ]
 	     [ [ \--merge-order [ \--show-breaks ] ] | [ \--topo-order ] ]
 	     [ \--parents ]
@@ -80,6 +81,9 @@ OPTIONS
 	(still subject to count and age limitation), but apply
 	merge simplification nevertheless.
 
+--remove-empty::
+	Stop when a given path disappears from the tree.
+
 --all::
 	Pretend as if all the refs in `$GIT_DIR/refs/` are
 	listed on the command line as <commit>.

Makefile

@@ -182,7 +182,7 @@ LIB_H = \
 
 DIFF_OBJS = \
 	diff.o diffcore-break.o diffcore-order.o diffcore-pathspec.o \
-	diffcore-pickaxe.o diffcore-rename.o tree-diff.o
+	diffcore-pickaxe.o diffcore-rename.o tree-diff.o combine-diff.o
 
 LIB_OBJS = \
 	blob.o commit.o connect.o count-delta.o csum-file.o \

cache.h

@@ -221,6 +221,9 @@ extern int has_pack_file(const unsigned char *sha1);
 extern int has_pack_index(const unsigned char *sha1);
 
 /* Convert to/from hex/sha1 representation */
+#define MINIMUM_ABBREV 4
+#define DEFAULT_ABBREV 7
+
 extern int get_sha1(const char *str, unsigned char *sha1);
 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
 extern char *sha1_to_hex(const unsigned char *sha1);	/* static buffer result! */