[m-rev.] diff: make it possible run an installed compiler built in the C# grade

[Julien Fischer]

Make it possible to run an installed compiler built in the C# grade.

scripts/mercury_compile.sh-csharp:
    Add a script script that runs an installed compiler built in the C#
    grade using Mono.  As with compilers built in the Java grade, the
    wrapper script we generate in the compiler directory only works
    in situ and we require a separate script for the installed version.

    XXX TODO: we will need to handle .NET differently, probably by simply
    renaming top_level.exe -> mercury_compile.exe.

scripts/Mmakefile:
     Install the new script if the compiler was built in the C# grade.

Julien.

diff --git a/scripts/Mmakefile b/scripts/Mmakefile
index fa60cf9..fec7841 100644
--- a/scripts/Mmakefile
+++ b/scripts/Mmakefile
@@ -62,6 +62,9 @@ JAVA_WRAPPER_SCRIPTS = \
  	mercury_compile	\
  	mfilterjavac

+CSHARP_WRAPPER_SCRIPTS = \
+	mercury_compile
+
  #-----------------------------------------------------------------------------#

  # .SUFFIXES: .in
@@ -130,7 +133,7 @@ install_mmake: Mmake.vars Mmake.rules install_dirs

  .PHONY: install_scripts
  install_scripts: $(SCRIPTS) install_dirs
-	# we move the installed `mmake' script before (re)installing it
+	# We move the installed `mmake' script before (re)installing it
  	# to avoid overwriting the script while it is running
  	# (just removing it doesn't work very well on win32, which will
  	# deny you permission to write the file while mmake is running).
@@ -146,6 +149,11 @@ ifeq ($(findstring java,$(GRADE)),java)
  		cp $$file.sh-java $(INSTALL_MERC_BIN_DIR)/$$file ;\
  	done
  endif
+ifeq ($(findstring csharp,$(GRADE)),csharp)
+	for file in $(CSHARP_WRAPPER_SCRIPTS); do \
+		cp $$file.sh-csharp $(INSTALL_MERC_BIN_DIR)/$$file ;\
+	done
+endif

  .PHONY: install_config
  install_config: Mercury.config install_dirs
diff --git a/scripts/mercury_compile.sh-csharp b/scripts/mercury_compile.sh-csharp
new file mode 100755
index 0000000..0251c46
--- /dev/null
+++ b/scripts/mercury_compile.sh-csharp
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+# This script invokes the _installed_ version of the Mercury compiler when it
+# is built in the C# grade and run using Mono.
+
+DIR=${0%/*}
+DIR=$( cd "${DIR}" && pwd -P )
+case $WINDIR in
+   '') SEP=':' ;;
+   *)  SEP=';' ;;
+esac
+MONO_PATH="$DIR/../lib/mercury/lib/csharp"${SEP}$MONO_PATH
+export MONO_PATH
+CLI_INTERPRETER=${CLI_INTERPRETER:-/opt/local/bin/mono}
+exec "$CLI_INTERPRETER" "$DIR/top_level.exe" "$@"