prettier test coverage reporting (#63)

* include git branch and coverage summary in report directory names

* refactoring typo

* hex encode, instead of urlencode, to work around GitHub Pages quirk

Author: dgoffredo

bin/publish-coverage

@@ -38,20 +38,43 @@ git fetch --depth=1 --filter=blob:none origin "$branch"
 git sparse-checkout set dummy/
 git checkout "$branch"
 
-# e.g. "2022-12-29 22:09:54 UTC (6c6e440)"
-coverage_report_name() {
-    commit_time_iso=$(git show -s --format=%cI)
-    commit_hash_short=$(git rev-parse HEAD | head -c 7)
-
-    date "--date=$commit_time_iso" --iso-8601=seconds --utc | \
-        sed -e 's/T/ /' -e "s/+.*/ UTC ($commit_hash_short)/"
+hex_encode() {
+  string=$1
+  while [ -n "$string" ]; do
+    tail=${string#?}
+    head=${string%"$tail"}
+    printf '%02x' "'$head"
+    string=$tail
+  done
+  printf '\n'
 }
 
 cd "$tracer_dir"
-report_name=$(coverage_report_name)
+
+commit_time_iso=$(git show -s --format=%cI)
+commit_hash_short=$(git rev-parse HEAD | head -c 7)
+commit_branch=$(git branch --show-current)
+branch_encoded=$(hex_encode "$commit_branch")
+commit_time_iso=$(date "--date=$commit_time_iso" --iso-8601=ns --utc | \
+        sed -e 's/,/./g' -e 's/......+00:00$/Z/')
+coverage_lines=$(grep -A 3 Lines .coverage/report/index.html | \
+        sed -n 's/.*>\([0-9.]\+\).*/\1/p' | \
+        paste -s | \
+        awk '{print "lines:"$1":"$2":"$3}')
+coverage_funcs=$(grep -A 3 Functions .coverage/report/index.html | \
+        sed -n 's/.*>\([0-9.]\+\).*/\1/p' | \
+        paste -s | \
+        awk '{print "funcs:"$1":"$2":"$3}')
+report_name=$(printf '%s-%s-%s-%s-%s\n' \
+        "$commit_time_iso" \
+        "$commit_hash_short" \
+        "$coverage_lines" \
+        "$coverage_funcs" \
+        "$branch_encoded")
+
 mv .coverage/report "$temp_dir/dd-trace-cpp-coverage/$report_name"
 
 cd "$temp_dir/dd-trace-cpp-coverage"
 git add -A --sparse
-git commit -m "add $report_name"
+git commit -m "coverage for commit $commit_hash_short on $commit_branch"
 git push