[FYI] {ylwrap-refactor} ylwrap: warn when expected output files are missing

[Stefano Lattarini]

* lib/ylwrap (handle_renaming): Warn if an expected output file
from the wrapped program is missing, instead of just erroring out
silently.
* tests/ylwrap-fail.test: Extend.
---
 ChangeLog              |    8 ++++++++
 lib/ylwrap             |    5 ++++-
 tests/ylwrap-fail.test |    2 ++
 3 files changed, 14 insertions(+), 1 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 870d41b..e262cce 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,13 @@
 2011-05-05  Stefano Lattarini  <stefano.lattar...@gmail.com>
 
+       ylwrap: warn when expected output files are missing
+       * lib/ylwrap (handle_renaming): Warn if an expected output file
+       from the wrapped program is missing, instead of just erroring out
+       silently.
+       * tests/ylwrap-fail.test: Extend.
+
+2011-05-05  Stefano Lattarini  <stefano.lattar...@gmail.com>
+
        ylwrap: new subroutine `handle_renaming'
        * lib/ylwrap: Move most of the code in the main loop into ...
        (handle_renaming): ... this new subroutine.
diff --git a/lib/ylwrap b/lib/ylwrap
index 0b0c7e8..77e68a3 100755
--- a/lib/ylwrap
+++ b/lib/ylwrap
@@ -142,7 +142,10 @@ handle_renaming ()
       # used, we don't want an error when the `y.output' file is "missing".
       case $wrapped:$ofrom in
         yacc:y.tab.h|yacc:y.output) ;;
-        *) ret=1;;
+        *)
+          echo "ylwrap: expected file \`$from' not found" >&2
+          ret=1
+          ;;
       esac
     fi
 }
diff --git a/tests/ylwrap-fail.test b/tests/ylwrap-fail.test
index 149fa0f..b328153 100755
--- a/tests/ylwrap-fail.test
+++ b/tests/ylwrap-fail.test
@@ -86,6 +86,7 @@ cd dummy1
 $SHELL ../ylwrap --yacc .y foo.y foo.c -- true 2>../stderr \
   && { cat ../stderr >&2; Exit 1; }
 cat ../stderr >&2
+grep "^ylwrap: expected file \`y\.tab\.c' not found" ../stderr
 check_emptydir
 cd ..
 
@@ -94,6 +95,7 @@ cd dummy2
 $SHELL ../ylwrap --lex lex.yy foo.l foo.c -- true 2>../stderr \
   && { cat ../stderr >&2; Exit 1; }
 cat ../stderr >&2
+grep "^ylwrap: expected file \`lex\.yy\.c' not found" ../stderr
 check_emptydir
 cd ..
 
-- 
1.7.2.3