Merge branch 'jk/test-suite-tracing'

diff --git a/t/test-lib.sh b/t/test-lib.sh
index 9b61f16f7a8807ad96014d79f1d1b968397584bf..9a0a21f49ae7bef3d0a1b653cce811d12499672e 100644 (file)
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -80,7 +80,7 @@ done,*)
        # from any previous runs.
        >"$GIT_TEST_TEE_OUTPUT_FILE"
 
-       (GIT_TEST_TEE_STARTED=done ${SHELL_PATH} "$0" "$@" 2>&1;
+       (GIT_TEST_TEE_STARTED=done ${TEST_SHELL_PATH} "$0" "$@" 2>&1;
         echo $? >"$BASE.exit") | tee -a "$GIT_TEST_TEE_OUTPUT_FILE"
        test "$(cat "$BASE.exit")" = 0
        exit
@@ -175,9 +175,10 @@ esac
 
 # Convenience
 #
-# A regexp to match 5 and 40 hexdigits
+# A regexp to match 5, 35 and 40 hexdigits
 _x05='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
-_x40="$_x05$_x05$_x05$_x05$_x05$_x05$_x05$_x05"
+_x35="$_x05$_x05$_x05$_x05$_x05$_x05$_x05"
+_x40="$_x35$_x05"
 
 # Zero SHA-1
 _z40=0000000000000000000000000000000000000000
@@ -193,7 +194,7 @@ LF='
 # when case-folding filenames
 u200c=$(printf '\342\200\214')
 
-export _x05 _x40 _z40 LF u200c EMPTY_TREE EMPTY_BLOB
+export _x05 _x35 _x40 _z40 LF u200c EMPTY_TREE EMPTY_BLOB
 
 # Each test should start with something like this, after copyright notices:
 #
@@ -263,7 +264,6 @@ do
                shift ;;
        -x)
                trace=t
-               verbose=t
                shift ;;
        --verbose-log)
                verbose_log=t
@@ -282,6 +282,11 @@ then
        test -z "$verbose_log" && verbose=t
 fi
 
+if test -n "$trace" && test -z "$verbose_log"
+then
+       verbose=t
+fi
+
 if test -n "$color"
 then
        # Save the color control sequences now rather than run tput
@@ -585,7 +590,9 @@ maybe_setup_valgrind () {
 }
 
 want_trace () {
-       test "$trace" = t && test "$verbose" = t
+       test "$trace" = t && {
+               test "$verbose" = t || test "$verbose_log" = t
+       }
 }
 
 # This is a separate function because some tests use
@@ -600,26 +607,40 @@ test_eval_inner_ () {
 }
 
 test_eval_ () {
-       # We run this block with stderr redirected to avoid extra cruft
-       # during a "-x" trace. Once in "set -x" mode, we cannot prevent
+       # If "-x" tracing is in effect, then we want to avoid polluting stderr
+       # with non-test commands. But once in "set -x" mode, we cannot prevent
        # the shell from printing the "set +x" to turn it off (nor the saving
        # of $? before that). But we can make sure that the output goes to
        # /dev/null.
        #
-       # The test itself is run with stderr put back to &4 (so either to
-       # /dev/null, or to the original stderr if --verbose was used).
+       # There are a few subtleties here:
+       #
+       #   - we have to redirect descriptor 4 in addition to 2, to cover
+       #     BASH_XTRACEFD
+       #
+       #   - the actual eval has to come before the redirection block (since
+       #     it needs to see descriptor 4 to set up its stderr)
+       #
+       #   - likewise, any error message we print must be outside the block to
+       #     access descriptor 4
+       #
+       #   - checking $? has to come immediately after the eval, but it must
+       #     be _inside_ the block to avoid polluting the "set -x" output
+       #
+
+       test_eval_inner_ "$@" </dev/null >&3 2>&4
        {
-               test_eval_inner_ "$@" </dev/null >&3 2>&4
                test_eval_ret_=$?
                if want_trace
                then
                        set +x
-                       if test "$test_eval_ret_" != 0
-                       then
-                               say_color error >&4 "error: last command exited with \$?=$test_eval_ret_"
-                       fi
                fi
-       } 2>/dev/null
+       } 2>/dev/null 4>&2
+
+       if test "$test_eval_ret_" != 0 && want_trace
+       then
+               say_color error >&4 "error: last command exited with \$?=$test_eval_ret_"
+       fi
        return $test_eval_ret_
 }
 
@@ -1027,6 +1048,8 @@ test -z "$NO_PERL" && test_set_prereq PERL
 test -z "$NO_PTHREADS" && test_set_prereq PTHREADS
 test -z "$NO_PYTHON" && test_set_prereq PYTHON
 test -n "$USE_LIBPCRE1$USE_LIBPCRE2" && test_set_prereq PCRE
+test -n "$USE_LIBPCRE1" && test_set_prereq LIBPCRE1
+test -n "$USE_LIBPCRE2" && test_set_prereq LIBPCRE2
 test -z "$NO_GETTEXT" && test_set_prereq GETTEXT
 
 # Can we rely on git's output in the C locale?