Turns out there is a simpler way of getting a set difference in bash than parsing...

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172420 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/utils/find-unused-diagnostics.sh b/utils/find-unused-diagnostics.sh
index cd6444d1e0c1609d6f42307b4cdfd6632ed156dd..c7fa01a9352b774be2983c3abfb4276d4ee040a0 100755 (executable)
--- a/utils/find-unused-diagnostics.sh
+++ b/utils/find-unused-diagnostics.sh
@@ -12,4 +12,4 @@ ALL_SOURCES=$(find lib include tools -name \*.cpp -or -name \*.h)
 DIAGS_IN_SOURCES=$(grep -E --only-matching --no-filename '(err_|warn_|ext_|note_)[a-z_]+' $ALL_SOURCES)
 
 # Print all diags that occur in the .td files but not in the source.
-diff -u <(sort -u <<< "$ALL_DIAGS") <(sort -u <<< "$DIAGS_IN_SOURCES") | sed -En 's/^-([a-z_]+)/\1/p'
+comm -23 <(sort -u <<< "$ALL_DIAGS") <(sort -u <<< "$DIAGS_IN_SOURCES")