Add msvc-filter utility

1 files changed, 5 insertions, 94 deletions

diff --git a/msvc-common b/msvc-common
index 096b17f..479ec3f 100755
--- a/msvc-common
+++ b/msvc-common
@@ -33,107 +33,18 @@ function split_translate () # <length> <option-path>
 # The <diag> argument should be 1 or 2. It indicates whether the diagnostics
 # is sent to stdout (1) or stderr (2).
 #
-# Note that if <exe> returns non-zero exit status, then this function calls
-# exit, not return. It also clears the ERR trap and overrides the EXIT trap.
-# All this pretty much means it should be the last statement in a call.
-#
 function msvc_exec () # <diag> <exe> <arg>...
 {
-  local diag=$1
-  shift
-
-  local exe="$1"
+  local diag="$1"
   shift
 
-  # Assemble the arguments in an array to store in case they contain spaces.
-  #
-  local args=()
-
-  while [ $# -gt 0 ]; do
-    args=("${args[@]}" "$1")
-    shift
-  done
-
-  # Translate absolute Windows paths back to POSIX. The hard part here is to
-  # determing the end of the path. For example, the error location has the
-  # 'X:\...\foo(10):' form. However, we cannot assume that '(' ends the path;
-  # remember 'Program Files (x86)'.
-  #
-  # To sidestep this whole mess we are going to use this trick: instead of
-  # translating the whole path we will only translate its directory part, that
-  # is the longest part that still ends with the directory separator. We will
-  # also still recognize ':' and ''' as path terminators as well as space if
-  # it is the first character in the component.
-  #
-  # We also pass the path through realpath in order to get the actual path
-  # rather than Wine's dosdevices links.
-  #
-
-  # First delimit paths that we need to translate with NUL characters.
-  #
-  local s1="s#[A-Za-z]:[\\/]([^ ':][^':]*[\\/])*#\x00&\x00#g"
-
-  # Next translate the paths (note the -z sed option). The last xargs call
-  # does two things: it removes the newline added by realpath and adds the
-  # trailing slash removed by realpath.
-  #
-  # Substitution useful for debugging: #/bin/echo -n '&'#
-  #
-  local s2="s#^[A-Za-z]:[\\/]([^ ':][^':]*[\\/])*#winepath -u0 '&' | \
-xargs -0 realpath -z | xargs -0 -I{} /bin/echo -n {}/#e"
-
-  # Finally, get rid of the NUL characters. While at it, also kill Windows
-  # CR (0x0d).
-  #
-  local s3="s#\x00##g;s#\x0d##g"
-
-  # For testing/debugging:
-  #
-  #cat input | sed -re "$s1" | sed -z -re "$s2" | sed -re "$s3"
-
   # Suppress Wine noise.
   #
   export WINEDEBUG=fixme-all
 
-  # Create a temporary named pipe.
-  #
-  local pipe
-  pipe="$(mktemp -u)"
-  mkfifo $pipe
-  trap "{ rm $pipe; }" EXIT
-
-  if [ $diag -eq 1 ]; then
-    wine "$exe" "${args[@]}" 2>&1 1>$pipe &
-    sed -re "$s1" $pipe | sed -z -re "$s2" | sed -re "$s3"
-  else
-    # For some reason Wine is really slow when we redirect stdout to
-    # /dev/null. A lot slower than redirecting it to a file. This is observed
-    # with Wine 1.7, 1.8, and 1.9. As an admittedly bizarre workaround we are
-    # going to channel the output via a fifo. Yes, it does help, a lot.
-    #
-    local opipe
-    opipe="$(mktemp -u)"
-    mkfifo $opipe
-    trap "{ rm $pipe $opipe; }" EXIT
-
-    cat $opipe &
-    local pid=$!
-
-    wine "$exe" "${args[@]}" 2>$pipe >$opipe &
-    sed -re "$s1" $pipe | sed -z -re "$s2" | sed -re "$s3" 1>&2
-
-    # Wait for cat. If it fails then the ERR trap will terminate us.
-    #
-    wait $pid
-  fi
-
-  # Wait for the wine process and exit with its exit status if it's not
-  # zero. Don't you just hate bash sometimes? I sure do.
+  # Filter diagnostics output replacing absolute Windows paths with their
+  # POSIX mapping. If <diag> is 1 then both stdout and stderr output are read
+  # and filtered.
   #
-  trap - ERR
-  wait $!
-  local r=$?
-  if [ $r -ne 0 ]; then
-    exit $r
-  fi
+  "$(dirname $(realpath ${BASH_SOURCE[0]}))/msvc-filter" "$diag" wine "$@"
 }