From 009bb8de03ce9708d4d797166187250f77a59a36 Mon Sep 17 00:00:00 2001
From: Bradley Dice <bdice@bradleydice.com>
Date: Mon, 21 Oct 2024 14:24:34 -0500
Subject: [PATCH] Use Python for sccache hit rate computation. (#420)

Fixes an issue in CI computations of sccache hit rates. See
https://github.com/rapidsai/cuvs/pull/414 for details.
---
 build.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/build.sh b/build.sh
index 29e8fe7c6..9503dff21 100755
--- a/build.sh
+++ b/build.sh
@@ -410,14 +410,14 @@ if (( ${NUMARGS} == 0 )) || hasArg libcuvs || hasArg docs || hasArg tests || has
           if [[ ${CACHE_TOOL} == "sccache" && -x "$(command -v sccache)" ]]; then
               COMPILE_REQUESTS=$(sccache -s | grep "Compile requests \+ [0-9]\+$" | awk '{ print $NF }')
               CACHE_HITS=$(sccache -s | grep "Cache hits \+ [0-9]\+$" | awk '{ print $NF }')
-              HIT_RATE=$(echo - | awk "{printf \"%.2f\n\", $CACHE_HITS / $COMPILE_REQUESTS * 100}")
+              HIT_RATE=$(python3 -c "print(f'{${CACHE_HITS} / ${COMPILE_REQUESTS}:.2f}' if ${COMPILE_REQUESTS} else 'nan')")
               MSG="${MSG}<br/>cache hit rate ${HIT_RATE} %"
           elif [[ ${CACHE_TOOL} == "ccache" && -x "$(command -v ccache)" ]]; then
               CACHE_STATS_LINE=$(ccache -s | grep "Hits: \+ [0-9]\+ / [0-9]\+" | tail -n1)
               if [[ ! -z "$CACHE_STATS_LINE" ]]; then
                   CACHE_HITS=$(echo "$CACHE_STATS_LINE" - | awk '{ print $2 }')
                   COMPILE_REQUESTS=$(echo "$CACHE_STATS_LINE" - | awk '{ print $4 }')
-                  HIT_RATE=$(echo - | awk "{printf \"%.2f\n\", $CACHE_HITS / $COMPILE_REQUESTS * 100}")
+                  HIT_RATE=$(python3 -c "print(f'{${CACHE_HITS} / ${COMPILE_REQUESTS}:.2f}' if ${COMPILE_REQUESTS} else 'nan')")
                   MSG="${MSG}<br/>cache hit rate ${HIT_RATE} %"
               fi
           fi