Remove source file filtering in clang_wrapper

Summary:public
Remove option to filter source files from being analysed from clang wrapper.
The option is unused and there should be better mechanism to do so if we need it.
This will slightly simplify the script and allow to analyze files that are from
outside of "blessed" extensions (such as .cxx or .hpp)

Reviewed By: dulmarod

Differential Revision: D3126330

fb-gh-sync-id: 1628913
fbshipit-source-id: 1628913

infer/lib/clang_wrappers/clang_general_wrapper

@@ -22,9 +22,6 @@ PLUGIN_PATH="${SCRIPT_DIR}/../../../${CLANG_PLUGIN_REL_PATH}"
 PLUGIN_NAME="BiniouASTExporter"
 # output directory of the plugin
 RESULTS_DIR="${FCP_RESULTS_DIR}"
-# space-separated list of source file extensions to compile, where the plugin is needed
-# e.g. EXTENSIONS="c cpp m mm" (*note* no dots needed)
-EXTENSIONS="${FCP_EXTENSIONS}"
 # this forces the wrapper to invoke get_standard_commandline_args to get
 # a more precise clang command with all the arguments in the right place (slow)
 USE_STD_CLANG_CMD="${FCP_USE_STD_CLANG_CMD}"
@@ -59,15 +56,6 @@ CWD=$(pwd)
 CWD="${CWD%/}"
 [ ! -d "$RESULTS_DIR" ] && mkdir -p "$RESULTS_DIR"
 
-# If no extensions provided, will use default ones (c, h, cc, cpp, m, mm)
-if [ -z "$EXTENSIONS" ]; then
-    EXTENSIONS="c h cc cpp m mm"
-fi
-
-# regular expression for grep to look for specific extensions
-# (for example c,h,m files)
-EXTENSIONS_REGEX="\.($(echo $EXTENSIONS | tr ' ' '|'))$"
-
 # Functions
 function get_option_argument {
     # retrieves the value passed to an argument of a clang command
@@ -107,15 +95,13 @@ then
     # get the source file name
     if [ -n "$USE_STD_CLANG_CMD" ]; then
         # the source file is at the end of the command, match it with the wanted extensions
-        SOURCE_FILE=$(echo ${INPUT_ARGUMENTS[${#INPUT_ARGUMENTS[@]} - 1]} \
-            | grep -i -E "$EXTENSIONS_REGEX")
+        SOURCE_FILE=$(echo ${INPUT_ARGUMENTS[${#INPUT_ARGUMENTS[@]} - 1]})
     else
         # in this case we search for the argument after -c, match it with the wanted extensions
-        SOURCE_FILE=$(get_option_argument "-c" "${INPUT_ARGUMENTS[@]}" \
-            | grep -i -E "$EXTENSIONS_REGEX")
+        SOURCE_FILE=$(get_option_argument "-c" "${INPUT_ARGUMENTS[@]}")
     fi
 
-    if [ -n "$SOURCE_FILE" ]
+    if [ -f "$SOURCE_FILE" ]
     then
         # (t7400979) this is a workaround to avoid that clang crashes when the -fmodules flag
         # and the YojsonASTExporter plugin are used. Since the -plugin argument disables