maint.mk: improve sc_prohibit_magic_number_exit

* top/maint.mk (sc_prohibit_magic_number_exit): Tighten regexp
so it does not match uses like System.exit(1).
Add comments showing how to correct all offenders.

diff --git a/ChangeLog b/ChangeLog
index eacd8e0..51fe8ed 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2009-11-20  Jim Meyering  <meyering@redhat.com>
+
+       maint.mk: improve sc_prohibit_magic_number_exit
+       * top/maint.mk (sc_prohibit_magic_number_exit): Tighten regexp
+       so it does not match uses like System.exit(1).
+       Add comments showing how to correct all offenders.
+
 2009-11-19  Eric Blake  <ebb9@byu.net>
 
        xalloc-die-tests: add missing library

diff --git a/top/maint.mk b/top/maint.mk
index 34d66e1..3452a15 100644 (file)
--- a/top/maint.mk
+++ b/top/maint.mk
@@ -157,8 +157,17 @@ sc_prohibit_strcmp:
                1>&2; exit 1; } || :
 
 # Pass EXIT_*, not number, to usage, exit, and error (when exiting)
+# Convert all uses automatically, via these two commands:
+# git grep -l '\<exit *(1)' \
+#  | grep -vEf .x-sc_prohibit_magic_number_exit \
+#  | xargs --no-run-if-empty \
+#      perl -pi -e 's/(^|[^.])\b(exit ?)\(1\)/$1$2(EXIT_FAILURE)/'
+# git grep -l '\<exit *(0)' \
+#  | grep -vEf .x-sc_prohibit_magic_number_exit \
+#  | xargs --no-run-if-empty \
+#      perl -pi -e 's/(^|[^.])\b(exit ?)\(0\)/$1$2(EXIT_SUCCESS)/'
 sc_prohibit_magic_number_exit:
-       @re='\<(usage|exit) ?\([0-9]|\<error ?\([1-9][0-9]*,'           \
+       @re='(^|[^.])\<(usage|exit) ?\([0-9]|\<error ?\([1-9][0-9]*,'   \
        msg='use EXIT_* values rather than magic number'                \
          $(_prohibit_regexp)