core: Track build time inside git config

Use the repo's git config to track the running average of how long it
takes to rebuild the project (to localise and improve the runtime
estimation).

1 files changed, 14 insertions, 7 deletions

diff --git a/ezbench.sh b/ezbench.sh
index a2331e8..902a4f3 100755
--- a/ezbench.sh
+++ b/ezbench.sh
@@ -18,7 +18,6 @@ LC_NUMERIC="C"
 
 #Default values
 rounds=3
-avgBuildTime=30
 makeCommand="make -j8 install"
 lastNCommits=
 uptoCommit="HEAD"
@@ -119,12 +118,6 @@ while getopts "h?p:n:N:H:r:b:B:m:T:l" opt; do
 done
 shift $((OPTIND-1))
 
-# Set the average compilation time to 0 when we are not compiling
-if [ -z "$makeCommand" ]
-then
-    avgBuildTime=0
-fi
-
 # redirect the output to both a log file and stdout
 logsFolder="$ezBenchDir/logs/${name:-$(date +"%Y-%m-%d-%T")}"
 [ -d $logsFolder ] || mkdir -p $logsFolder || exit 1
@@ -250,6 +243,14 @@ if [ -n "$missing_tests" ]; then
     exit 1
 fi
 
+# Set the average compilation time to 0 when we are not compiling
+if [ -z "$makeCommand" ]
+then
+    avgBuildTime=0
+else
+    avgBuildTime=$(git config --get ezbench.average-build-time 2>/dev/null || echo 30)
+fi
+
 # Estimate the execution time
 if [ -z "$commitList" ]; then
     commitList=$(git rev-list --abbrev-commit --reverse -n ${lastNCommits} ${uptoCommit})
@@ -281,7 +282,9 @@ function compile {
 
     # Compile the commit and check for failure. If it failed, go to the next commit.
     compile_logs=$logsFolder/${commit}_compile_log
+    compile_start=$(date +%s)
     eval $makeCommand > $compile_logs 2>&1
+    compile_end=$(date +%s)
     if [ $? -ne 0 ]
     then
         echo "    ERROR: Compilation failed, log saved in $compile_logs"
@@ -290,6 +293,10 @@ function compile {
         continue
     fi
 
+    # Update our build time estimator
+    avgBuildTime=$(bc <<< "0.75*$avgBuildTime + 0.25*($compile_end - $compile_start)")
+    git config --replace-all ezbench.average-build-time $(printf "%.0f" $avgBuildTime)
+
     # Call the user-defined post-compile hook
     callIfDefined compile_post_hook