added mean aggregation over each metric

steps/aggregate.sh

@@ -59,6 +59,26 @@ printf "\n" >> "${all}"
 echo "All $(wc -l "${all}" | xargs) projects aggregated$("${LOCAL}/help/tdiff.sh" "${start}")"
 printf "\n"
 
+mkdir -p "${TARGET}/data/aggregation"
+
+jobs=${TARGET}/temp/jobs/aggregate-function-jobs.txt
+rm -rf "${jobs}"
+mkdir -p "$(dirname "${jobs}")"
+touch "${jobs}"
+
+for metric in ${metrics}; do
+    metric_file="${TARGET}/data/${metric}.csv"
+
+    if [[ -f "${metric_file}" ]]; then
+        sh="${LOCAL}/steps/aggregation-functions/mean.sh"
+        output_folder="${TARGET}/data/aggregation"
+        printf "%s %s %s %s %s %s\n" "${sh@Q}" "${metric_file}" "${output_folder@Q}" "${metric@Q}" >> "${jobs}"
+    fi
+done
+
+"${LOCAL}/help/parallel.sh" "${jobs}"
+wait
+
 jobs=${TARGET}/temp/jobs/aggregate-join-jobs.txt
 rm -rf "${jobs}"
 mkdir -p "$(dirname "${jobs}")"

steps/aggregation-functions/mean.sh

@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+# The MIT License (MIT)
+#
+# Copyright (c) 2021-2024 Yegor Bugayenko
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+set -e
+set -o pipefail
+
+metric_file=$1
+output_folder=$2
+metric_name=$3
+
+mkdir -p "${output_folder}"
+
+sum=0
+count=0
+
+values=$(awk -F, 'NR > 1 {print $3}' "${metric_file}")
+
+while IFS= read -r value; do
+    sum=$(echo "$sum + $value" | bc)
+    count=$((count + 1))
+done <<< "${values}"
+
+if ((count > 0)); then
+    mean=$(echo "scale=3; $sum / $count" | bc)
+
+    formatted_mean=$(printf "%0.3f" "$mean")
+
+    output_file="${output_folder}/${metric_name}.mean.csv"
+    echo "$formatted_mean" > "${output_file}"
+    echo "Aggregated mean for ${metric_name}: $formatted_mean"
+else
+    echo "No valid data to aggregate for ${metric_name}"
+fi

tests/steps/aggregation-functions/test-mean.sh

@@ -0,0 +1,99 @@
+#!/usr/bin/env bash
+# The MIT License (MIT)
+#
+# Copyright (c) 2021-2024 Yegor Bugayenko
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+set -e
+set -o pipefail
+
+stdout=$2
+
+{
+    dir="${TARGET}"
+    mkdir -p "${dir}"
+    touch "${dir}/LCOM5.csv"
+    echo "repo,java_file,LCOM5" > "${dir}/LCOM5.csv"
+    echo "kek,src/main/kek,42.0000" >> "${dir}/LCOM5.csv"
+
+    "${LOCAL}/steps/aggregation-functions/mean.sh" "${dir}/LCOM5.csv" "${TARGET}/data/aggregation" "LCOM5"
+
+    test -e "${TARGET}/data/aggregation/LCOM5.mean.csv"
+    mean_value=$(cat "${TARGET}/data/aggregation/LCOM5.mean.csv")
+    test "$mean_value" = "42.000"
+} > "${stdout}" 2>&1
+echo "👍🏻 Single metric (LCOM5) mean calculated correctly"
+
+
+{
+    dir1="${TARGET}"
+    mkdir -p "${dir1}"
+    touch "${dir1}/LCOM5.csv"
+    echo "repo,java_file,LCOM5" > "${dir1}/LCOM5.csv"
+    echo "kek,src/main/kek,42.000" >> "${dir1}/LCOM5.csv"
+
+    touch "${dir1}/NHD.csv"
+    echo "repo,java_file,NHD" > "${dir1}/NHD.csv"
+    echo "kek,src/main/kek,1000.000" >> "${dir1}/NHD.csv"
+
+    "${LOCAL}/steps/aggregation-functions/mean.sh" "${dir1}/LCOM5.csv" "${TARGET}/data/aggregation" "LCOM5"
+
+    "${LOCAL}/steps/aggregation-functions/mean.sh" "${dir1}/NHD.csv" "${TARGET}/data/aggregation" "NHD"
+
+    test -e "${TARGET}/data/aggregation/LCOM5.mean.csv"
+    mean_value_lcom5=$(cat "${TARGET}/data/aggregation/LCOM5.mean.csv")
+    test "$mean_value_lcom5" = "42.000"
+
+    test -e "${TARGET}/data/aggregation/NHD.mean.csv"
+    mean_value_nhd=$(cat "${TARGET}/data/aggregation/NHD.mean.csv")
+    test "$mean_value_nhd" = "1000.000"
+} > "${stdout}" 2>&1
+echo "👍🏻 Multiple metrics (LCOM5, NHD) aggregated correctly"
+
+
+{
+    dir1="${TARGET}"
+    mkdir -p "${dir1}"
+    touch "${dir1}/First.java.m.LCOM5"
+    echo "repo,java_file,LCOM5" > "${dir1}/LCOM5.csv"
+    echo "kek,src/main/kek,42.000" >> "${dir1}/LCOM5.csv"
+    echo "kek,src/main/kek,35.000" >> "${dir1}/LCOM5.csv"
+    echo "kek,src/main/kek,50.000" >> "${dir1}/LCOM5.csv"
+
+    "${LOCAL}/steps/aggregation-functions/mean.sh" "${dir1}/LCOM5.csv" "${TARGET}/data/aggregation" "LCOM5"
+
+    test -e "${TARGET}/data/aggregation/LCOM5.mean.csv"
+    mean_value=$(cat "${TARGET}/data/aggregation/LCOM5.mean.csv")
+    test "$mean_value" = "42.333"
+} > "${stdout}" 2>&1
+echo "👍🏻 Mixed metrics aggregated correctly (LCOM5)"
+
+{
+    dir="${TARGET}"
+    mkdir -p "${dir}"
+    touch "${dir}/Empty.java.m.LCOM5"
+    echo "repo,java_file,LCOM5" > "${dir}/Empty.java.m.LCOM5"
+
+    "${LOCAL}/steps/aggregation-functions/mean.sh" "${dir}/Empty.java.m.LCOM5" "${TARGET}/data/aggregation" "LCOM5"
+
+    test -e "${TARGET}/data/aggregation/LCOM5.mean.csv"
+    mean_value=$(cat "${TARGET}/data/aggregation/LCOM5.mean.csv")
+    test "$mean_value" = "0.000"
+} > "${stdout}" 2>&1
+echo "👍🏻 Edge case with no data handled correctly"