Introduce a test runner script to simplify invocation

... And to use a standard, highly amusing trick for making
coloured output work.

hipamd/hipify-clang/CMakeLists.txt

@@ -6,9 +6,10 @@ option(HIPIFY_CLANG_TESTS "Build the tests for hipify-clang, if lit is installed
 # Disable the tests if `lit` or `FileCheck` is not installed.
 find_program(LIT_COMMAND lit)
 find_program(FILECHECK_COMMAND FileCheck)
-if (NOT LIT_COMMAND OR NOT FILECHECK_COMMAND)
+find_program(SOCAT_COMMAND socat)
+if (NOT LIT_COMMAND OR NOT FILECHECK_COMMAND OR NOT SOCAT_COMMAND)
     set(HIPIFY_CLANG_TESTS OFF CACHE INTERNAL "")
-    message(STATUS "hipify-clang's tests are not being built because `lit` or `FileCheck` could not be found.")
+    message(STATUS "hipify-clang's tests are not being built because `lit`,`FileCheck` or `socat` could not be found.")
 endif()
 
 set(BUILD_HIPIFY_CLANG 0 CACHE INTERNAL "")
@@ -88,6 +89,7 @@ if (HIPIFY_CLANG_TESTS)
     add_lit_testsuite(test-hipify "Running HIPify regression tests"
         ${CMAKE_SOURCE_DIR}/tests/hipify-clang
         PARAMS site_config=${CMAKE_CURRENT_BINARY_DIR}/tests/hipify-clang/lit.site.cfg
+        ARGS -v
         DEPENDS hipify-clang
     )
 

hipamd/tests/hipify-clang/axpy.cu

@@ -1,4 +1,4 @@
-// RUN: hipify "%s" -o=%t -- %cuda_args && cat %t | sed -Ee 's|//.+|// |g' | FileCheck %s
+// RUN: %run_test hipify "%s" "%t" %cuda_args
 
 #include <iostream>
 

hipamd/tests/hipify-clang/lit.cfg

@@ -48,3 +48,4 @@ config.substitutions.append(("hipify", obj_root+"/hipify-clang"))
 
 # Clang args for CUDA...
 config.substitutions.append(("%cuda_args", "-x cuda --cuda-path=%s --cuda-gpu-arch=sm_30" % config.cuda_root))
+config.substitutions.append(("%run_test", config.test_source_root + "/run_test.sh"))

hipamd/tests/hipify-clang/run_test.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+set -o errexit
+
+# Run a single LIT test file in a magical way that preserves colour output, to work around
+# a known flaw in lit.
+
+# Capture lit substitutions
+HIPIFY=$1
+IN_FILE=$2
+TMP_FILE=$3
+shift 3
+
+# Remaining args are the ones to forward to clang proper.
+
+# Time for the classic insane little trick for making colour output work.
+# A self-deleting shell-script that does the thing we want to do...
+TMP_SCRIPT=$(mktemp)
+cat << EOF > $TMP_SCRIPT
+set -o errexit
+set -o xtrace
+rm $TMP_SCRIPT
+$HIPIFY -o=$TMP_FILE $IN_FILE -- $@ && cat $TMP_FILE | sed -Ee 's|//.+|// |g' | FileCheck $IN_FILE
+EOF
+chmod a+x $TMP_SCRIPT
+
+# Run the script via socat, spawning a virtual terminal and propagating exit code, and hence failure.
+socat -du EXEC:$TMP_SCRIPT,pty,stderr STDOUT