reset: update cache-tree data when appropriate

diff --git a/Makefile b/Makefile
index 17404c43d64d08aff0bdf9b4e6b6eeddf9b8a5e7..b9400bcad31121f57cd421a1407322e7cab50ffc 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -250,6 +250,12 @@ all::
 #   DEFAULT_EDITOR='$GIT_FALLBACK_EDITOR',
 #   DEFAULT_EDITOR='"C:\Program Files\Vim\gvim.exe" --nofork'
 #
+# Define COMPUTE_HEADER_DEPENDENCIES to "yes" if you want dependencies on
+# header files to be automatically computed, to avoid rebuilding objects when
+# an unrelated header file changes.  Define it to "no" to use the hard-coded
+# dependency rules.  The default is "auto", which means to use computed header
+# dependencies if your compiler is detected to support it.
+#
 # Define CHECK_HEADER_DEPENDENCIES to check for problems in the hard-coded
 # dependency rules.
 #
@@ -429,6 +435,7 @@ TEST_PROGRAMS_NEED_X += test-ctype
 TEST_PROGRAMS_NEED_X += test-date
 TEST_PROGRAMS_NEED_X += test-delta
 TEST_PROGRAMS_NEED_X += test-dump-cache-tree
+TEST_PROGRAMS_NEED_X += test-scrap-cache-tree
 TEST_PROGRAMS_NEED_X += test-genrandom
 TEST_PROGRAMS_NEED_X += test-index-version
 TEST_PROGRAMS_NEED_X += test-line-buffer
@@ -515,9 +522,10 @@ LIB_H += compat/mingw.h
 LIB_H += compat/obstack.h
 LIB_H += compat/win32/pthread.h
 LIB_H += compat/win32/syslog.h
-LIB_H += compat/win32/sys/poll.h
+LIB_H += compat/win32/poll.h
 LIB_H += compat/win32/dirent.h
 LIB_H += connected.h
+LIB_H += convert.h
 LIB_H += csum-file.h
 LIB_H += decorate.h
 LIB_H += delta.h
@@ -1088,6 +1096,7 @@ ifeq ($(uname_S),Windows)
        NO_PREAD = YesPlease
        NEEDS_CRYPTO_WITH_SSL = YesPlease
        NO_LIBGEN_H = YesPlease
+       NO_SYS_POLL_H = YesPlease
        NO_SYMLINK_HEAD = YesPlease
        NO_IPV6 = YesPlease
        NO_SETENV = YesPlease
@@ -1126,7 +1135,7 @@ ifeq ($(uname_S),Windows)
        BASIC_CFLAGS = -nologo -I. -I../zlib -Icompat/vcbuild -Icompat/vcbuild/include -DWIN32 -D_CONSOLE -DHAVE_STRING_H -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_DEPRECATE
        COMPAT_OBJS = compat/msvc.o compat/winansi.o \
                compat/win32/pthread.o compat/win32/syslog.o \
-               compat/win32/sys/poll.o compat/win32/dirent.o
+               compat/win32/poll.o compat/win32/dirent.o
        COMPAT_CFLAGS = -D__USE_MINGW_ACCESS -DNOGDI -DHAVE_STRING_H -DHAVE_ALLOCA_H -Icompat -Icompat/regex -Icompat/win32 -DSTRIP_EXTENSION=\".exe\"
        BASIC_LDFLAGS = -IGNORE:4217 -IGNORE:4049 -NOLOGO -SUBSYSTEM:CONSOLE -NODEFAULTLIB:MSVCRT.lib
        EXTLIBS = user32.lib advapi32.lib shell32.lib wininet.lib ws2_32.lib
@@ -1181,6 +1190,7 @@ ifneq (,$(findstring MINGW,$(uname_S)))
        NO_PREAD = YesPlease
        NEEDS_CRYPTO_WITH_SSL = YesPlease
        NO_LIBGEN_H = YesPlease
+       NO_SYS_POLL_H = YesPlease
        NO_SYMLINK_HEAD = YesPlease
        NO_SETENV = YesPlease
        NO_UNSETENV = YesPlease
@@ -1214,7 +1224,7 @@ ifneq (,$(findstring MINGW,$(uname_S)))
        COMPAT_CFLAGS += -DSTRIP_EXTENSION=\".exe\"
        COMPAT_OBJS += compat/mingw.o compat/winansi.o \
                compat/win32/pthread.o compat/win32/syslog.o \
-               compat/win32/sys/poll.o compat/win32/dirent.o
+               compat/win32/poll.o compat/win32/dirent.o
        EXTLIBS += -lws2_32
        PTHREAD_LIBS =
        X = .exe
@@ -1243,21 +1253,32 @@ endif
 endif
 
 ifdef CHECK_HEADER_DEPENDENCIES
-COMPUTE_HEADER_DEPENDENCIES =
+COMPUTE_HEADER_DEPENDENCIES = no
 USE_COMPUTED_HEADER_DEPENDENCIES =
-else
+endif
+
 ifndef COMPUTE_HEADER_DEPENDENCIES
+COMPUTE_HEADER_DEPENDENCIES = auto
+endif
+
+ifeq ($(COMPUTE_HEADER_DEPENDENCIES),auto)
 dep_check = $(shell $(CC) $(ALL_CFLAGS) \
        -c -MF /dev/null -MMD -MP -x c /dev/null -o /dev/null 2>&1; \
        echo $$?)
 ifeq ($(dep_check),0)
-COMPUTE_HEADER_DEPENDENCIES=YesPlease
-endif
+override COMPUTE_HEADER_DEPENDENCIES = yes
+else
+override COMPUTE_HEADER_DEPENDENCIES = no
 endif
 endif
 
-ifdef COMPUTE_HEADER_DEPENDENCIES
+ifeq ($(COMPUTE_HEADER_DEPENDENCIES),yes)
 USE_COMPUTED_HEADER_DEPENDENCIES = YesPlease
+else
+ifneq ($(COMPUTE_HEADER_DEPENDENCIES),no)
+$(error please set COMPUTE_HEADER_DEPENDENCIES to yes, no, or auto \
+(not "$(COMPUTE_HEADER_DEPENDENCIES)"))
+endif
 endif
 
 ifdef SANE_TOOL_PATH
@@ -1904,7 +1925,7 @@ OBJECTS := $(GIT_OBJS) $(XDIFF_OBJS) $(VCSSVN_OBJS)
 dep_files := $(foreach f,$(OBJECTS),$(dir $f).depend/$(notdir $f).d)
 dep_dirs := $(addsuffix .depend,$(sort $(dir $(OBJECTS))))
 
-ifdef COMPUTE_HEADER_DEPENDENCIES
+ifeq ($(COMPUTE_HEADER_DEPENDENCIES),yes)
 $(dep_dirs):
        @mkdir -p $@
 
@@ -1917,7 +1938,7 @@ Please unset CHECK_HEADER_DEPENDENCIES and try again)
 endif
 endif
 
-ifndef COMPUTE_HEADER_DEPENDENCIES
+ifneq ($(COMPUTE_HEADER_DEPENDENCIES),yes)
 ifndef CHECK_HEADER_DEPENDENCIES
 dep_dirs =
 missing_dep_dirs =
@@ -2007,13 +2028,13 @@ builtin/branch.o builtin/checkout.o builtin/clone.o builtin/reset.o branch.o tra
 builtin/bundle.o bundle.o transport.o: bundle.h
 builtin/bisect--helper.o builtin/rev-list.o bisect.o: bisect.h
 builtin/clone.o builtin/fetch-pack.o transport.o: fetch-pack.h
-builtin/grep.o builtin/pack-objects.o transport-helper.o: thread-utils.h
+builtin/grep.o builtin/pack-objects.o transport-helper.o thread-utils.o: thread-utils.h
 builtin/send-pack.o transport.o: send-pack.h
 builtin/log.o builtin/shortlog.o: shortlog.h
 builtin/prune.o builtin/reflog.o reachable.o: reachable.h
 builtin/commit.o builtin/revert.o wt-status.o: wt-status.h
 builtin/tar-tree.o archive-tar.o: tar.h
-connect.o transport.o http-backend.o: url.h
+connect.o transport.o url.o http-backend.o: url.h
 http-fetch.o http-walker.o remote-curl.o transport.o walker.o: walker.h
 http.o http-walker.o http-push.o http-fetch.o remote-curl.o: http.h url.h
 
@@ -2127,17 +2148,21 @@ po/git.pot: $(LOCALIZED_C)
 
 pot: po/git.pot
 
+FIND_SOURCE_FILES = ( git ls-files '*.[hcS]' 2>/dev/null || \
+                       $(FIND) . \( -name .git -type d -prune \) \
+                               -o \( -name '*.[hcS]' -type f -print \) )
+
 $(ETAGS_TARGET): FORCE
        $(RM) $(ETAGS_TARGET)
-       $(FIND) . -name '*.[hcS]' -print | xargs etags -a -o $(ETAGS_TARGET)
+       $(FIND_SOURCE_FILES) | xargs etags -a -o $(ETAGS_TARGET)
 
 tags: FORCE
        $(RM) tags
-       $(FIND) . -name '*.[hcS]' -print | xargs ctags -a
+       $(FIND_SOURCE_FILES) | xargs ctags -a
 
 cscope:
        $(RM) cscope*
-       $(FIND) . -name '*.[hcS]' -print | xargs cscope -b
+       $(FIND_SOURCE_FILES) | xargs cscope -b
 
 ### Detect prefix changes
 TRACK_CFLAGS = $(CC):$(subst ','\'',$(ALL_CFLAGS)):\