Merge branch 'dl/cocci-everywhere'

Coccinelle checks are done on more source files than before now.

* dl/cocci-everywhere:
  Makefile: run coccicheck on more source files
  Makefile: strip leading ./ in $(FIND_SOURCE_FILES)
  Makefile: define THIRD_PARTY_SOURCES
  Makefile: strip leading ./ in $(LIB_H)

Makefile

@@ -598,6 +598,7 @@ SCRIPT_SH =
 SCRIPT_LIB =
 TEST_BUILTINS_OBJS =
 TEST_PROGRAMS_NEED_X =
+THIRD_PARTY_SOURCES =
 
 # Having this variable in your environment would break pipelines because
 # you cause "cd" to echo its destination to stdout.  It can also take
@@ -818,12 +819,12 @@ VCSSVN_LIB = vcs-svn/lib.a
 
 GENERATED_H += command-list.h
 
-LIB_H := $(sort $(shell git ls-files '*.h' ':!t/' ':!Documentation/' 2>/dev/null || \
+LIB_H := $(sort $(patsubst ./%,%,$(shell git ls-files '*.h' ':!t/' ':!Documentation/' 2>/dev/null || \
 	$(FIND) . \
 	-name .git -prune -o \
 	-name t -prune -o \
 	-name Documentation -prune -o \
-	-name '*.h' -print))
+	-name '*.h' -print)))
 
 LIB_OBJS += abspath.o
 LIB_OBJS += advice.o
@@ -1146,6 +1147,20 @@ BUILTIN_OBJS += builtin/verify-tag.o
 BUILTIN_OBJS += builtin/worktree.o
 BUILTIN_OBJS += builtin/write-tree.o
 
+# THIRD_PARTY_SOURCES is a list of patterns compatible with the
+# $(filter) and $(filter-out) family of functions. They specify source
+# files which are taken from some third-party source where we want to be
+# less strict about issues such as coding style so we don't diverge from
+# upstream unnecessarily (making merging in future changes easier).
+THIRD_PARTY_SOURCES += compat/inet_ntop.c
+THIRD_PARTY_SOURCES += compat/inet_pton.c
+THIRD_PARTY_SOURCES += compat/nedmalloc/%
+THIRD_PARTY_SOURCES += compat/obstack.%
+THIRD_PARTY_SOURCES += compat/poll/%
+THIRD_PARTY_SOURCES += compat/regex/%
+THIRD_PARTY_SOURCES += sha1collisiondetection/%
+THIRD_PARTY_SOURCES += sha1dc/%
+
 GITLIBS = common-main.o $(LIB_FILE) $(XDIFF_LIB)
 EXTLIBS =
 
@@ -2600,6 +2615,7 @@ FIND_SOURCE_FILES = ( \
 		-o \( -name 'trash*' -type d -prune \) \
 		-o \( -name '*.[hcS]' -type f -print \) \
 		-o \( -name '*.sh' -type f -print \) \
+		| sed -e 's|^\./||' \
 	)
 
 $(ETAGS_TARGET): FORCE
@@ -2769,7 +2785,7 @@ EXCEPT_HDRS := $(GEN_HDRS) compat/% xdiff/%
 ifndef GCRYPT_SHA256
 	EXCEPT_HDRS += sha256/gcrypt.h
 endif
-CHK_HDRS = $(filter-out $(EXCEPT_HDRS),$(patsubst ./%,%,$(LIB_H)))
+CHK_HDRS = $(filter-out $(EXCEPT_HDRS),$(LIB_H))
 HCO = $(patsubst %.h,%.hco,$(CHK_HDRS))
 
 $(HCO): %.hco: %.h FORCE
@@ -2792,12 +2808,8 @@ check: command-list.h
 		exit 1; \
 	fi
 
-C_SOURCES = $(patsubst %.o,%.c,$(C_OBJ))
-ifdef DC_SHA1_SUBMODULE
-COCCI_SOURCES = $(filter-out sha1collisiondetection/%,$(C_SOURCES))
-else
-COCCI_SOURCES = $(filter-out sha1dc/%,$(C_SOURCES))
-endif
+FOUND_C_SOURCES = $(filter %.c,$(shell $(FIND_SOURCE_FILES)))
+COCCI_SOURCES = $(filter-out $(THIRD_PARTY_SOURCES),$(FOUND_C_SOURCES))
 
 %.cocci.patch: %.cocci $(COCCI_SOURCES)
 	@echo '    ' SPATCH $<; \