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Re: [libvirt] [PATCH 5/6] syntax-check: Don't include duplicate header



On 15/04/13 23:11, Eric Blake wrote:
On 04/15/2013 12:28 AM, Osier Yang wrote:
---
  cfg.mk | 14 ++++++++++++++
  1 file changed, 14 insertions(+)

diff --git a/cfg.mk b/cfg.mk
index 394521e..9cf4cff 100644
--- a/cfg.mk
+++ b/cfg.mk
@@ -722,6 +722,20 @@ sc_prohibit_exit_in_tests:
  	halt='use return, not exit(), in tests'				\
  	  $(_sc_search_regexp)
+# Don't include duplidate header in the source (either *.c or *.h)
s/duplidate/duplicate/

+sc_prohibit_duplicate_header:
+	@if $(VC_LIST_EXCEPT) | grep -l '\.[ch]$$' > /dev/null; then	\
'grep -l' is wrong.  You want:

grep '\.[ch]$$'

instead (see sc_preprocessor_indenation for an example).

For that matter, the '@if ...; then check; else :; fi' is overkill; we
KNOW we have .c files so the grep will hit (that paradigm is used in
maint.mk, because maint.mk is shared among multiple projects where some
projects really do ship without C files).  I'd simplify this to just the
'check' portion, that is, all you need is from here...

In case of duplicate work, I finished this, but need more work on
6/6 to send out the set.


+	  for i in $$($(VC_LIST_EXCEPT) | grep '\.[ch]$$'); do		\
+	    for j in $$(grep '^# *include.*\.h' $$i			\
+	      | awk -F' ' '{print $$NF}'); do				\
+	      test $$(grep "^# *include $$j" $$i | wc -l) -gt 1 &&	\
Not the most efficient way to write this.  Your way does one grep/wc
pair per header line encountered per file.  But since you are already
running each file through awk, why not have awk set up a hash of all
includes it sees, and then report an error if the hash hits more than
once, all on a single awk pass per file instead of 20-30 grep passes per
file.  Would you like to take a shot at it, or shall I do it since I
mentioned it?

+		{ echo '$(ME): Duplidate header '$$j' in '$$i'' 1>&2;	\
s/Duplidate/Duplicate/

+		  exit 1; } || :;					\
+	    done;							\
+	  done;								\
...to here.

+	else :;								\
+	fi
+
  # We don't use this feature of maint.mk.
  prev_version_file = /dev/null


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