[FYI] {maint} [ng] maintcheck: some tweaks and fixlets

[Stefano Lattarini]

* syntax-checks.mk (sc_no_brace_variable_expansions): Do not complain
about ${MAKEVAR} usages in comments: they might be legitimate.  This
change is not strictly required for mainline automake, but will help
in the Automake-NG branch.
* sc_tests_here_document_format: Relax a bit, so that usages like
"cout << "string" << endl;" in the test scripts (usages which can be
used in here documents defining C++ sources) are not flagged as uses
of bad delimiters for here documents.  This change is not strictly
required for mainline automake, but will help in the Automake-NG
branch, and will anyway be more future proof w.r.t. possible future
testsuite additions.
(sc_tests_Exit_not_exit): Do not whitelist lines containing $PERL
explicitly (that was only required for one test); instead ...
* t/ext2.sh: ... use "exit (1)" instead of "exit 1" in the perl
invocation of the guilty script.

Signed-off-by: Stefano Lattarini <address@hidden>
---
 syntax-checks.mk |   12 ++++++------
 t/ext2.sh        |    2 +-
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/syntax-checks.mk b/syntax-checks.mk
index 402e17f..4b226a0 100644
--- a/syntax-checks.mk
+++ b/syntax-checks.mk
@@ -158,10 +158,10 @@ sc_perl_syntax:
        @perllibdir="./lib$(PATH_SEPARATOR)$(srcdir)/lib" $(PERL) -c -w automake
        @perllibdir="./lib$(PATH_SEPARATOR)$(srcdir)/lib" $(PERL) -c -w aclocal
 
-## expect no instances of '${...}'.  However, $${...} is ok, since that
+## Expect no instances of '${...}'.  However, $${...} is ok, since that
 ## is a shell construct, not a Makefile construct.
 sc_no_brace_variable_expansions:
-       @if grep -F '$${' $(ams) | grep -F -v '$$$$'; then \
+       @if grep -v '^ *#' $(ams) | grep -F '$${' | grep -F -v '$$$$'; then \
          echo "Found too many uses of '\$${' in the lines above." 1>&2; \
          exit 1;                               \
        else :; fi
@@ -335,19 +335,19 @@ $(sc_tests_plain_check_rules): sc_tests_plain_% :
 ## Tests should only use END and EOF for here documents
 ## (so that the next test is effective).
 sc_tests_here_document_format:
-       @if grep '<<' $(xtests) | grep -Ev '\b(END|EOF)\b|\bstd::cout <<'; then 
\
+       @if grep '<<' $(xtests) | grep -Ev '\b(END|EOF)\b|\bcout <<'; then \
          echo 'Use here documents with "END" and "EOF" only, for 
greppability.' 1>&2; \
          exit 1; \
        fi
 
 ## Tests should never call exit directly, but use Exit.
 ## This is so that the exit status is transported correctly across the 0 trap.
-## Ignore comments, testsuite self tests, and one perl line in ext2.sh.
+## Ignore comments and our testsuite's own self tests.
 sc_tests_Exit_not_exit:
        @found=false; for file in $(xtests); do \
          case $$file in */self-check-*) continue;; esac; \
-         res=`sed -n -e '/^#/d; /^\$$PERL/d' -e '/<<.*END/,/^END/b' \
-                     -e '/<<.*EOF/,/^EOF/b' -e '/exit [$$0-9]/p' $$file`; \
+         res=`sed -n -e '/^#/d' -e '/<<.*END/,/^END/b' -e '/<<.*EOF/,/^EOF/b' \
+                     -e '/exit [$$0-9]/p' $$file`; \
          if test -n "$$res"; then \
            echo "$$file:$$res"; \
            found=true; \
diff --git a/t/ext2.sh b/t/ext2.sh
index 3df0282..ac5b777 100755
--- a/t/ext2.sh
+++ b/t/ext2.sh
@@ -63,4 +63,4 @@ cat rules
 #|  #r-i.o: i.cxx
 
 # Bail out if we find a duplicate.
-$PERL -ne 'if (exists $a{$_}) { exit 1 } else { $a{$_} = 1 }' < rules
+$PERL -ne 'if (exists $a{$_}) { exit (1) } else { $a{$_} = 1 }' < rules
-- 
1.7.9.5