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| 1 | +#!/bin/bash |
| 2 | +# Copyright 2026 Google LLC |
| 3 | +# |
| 4 | +# Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | +# you may not use this file except in compliance with the License. |
| 6 | +# You may obtain a copy of the License at |
| 7 | +# |
| 8 | +# http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | +# |
| 10 | +# Unless required by applicable law or agreed to in writing, software |
| 11 | +# distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | +# See the License for the specific language governing permissions and |
| 14 | +# limitations under the License. |
| 15 | + |
| 16 | +set -eo pipefail |
| 17 | + |
| 18 | +# This script generates coverage reports for modified packages. |
| 19 | +# It assumes coverage databases have been downloaded to RESULTS_DIR. |
| 20 | +# It uses /dev/shm for high-performance processing. |
| 21 | + |
| 22 | +RESULTS_DIR="${RESULTS_DIR:-/dev/shm/.coverage-results}" |
| 23 | +LOG_DIR="/dev/shm/coverage-logs" |
| 24 | +DEFAULT_FAIL_UNDER="${DEFAULT_FAIL_UNDER:-99}" |
| 25 | +MAX_JOBS=$(nproc) |
| 26 | + |
| 27 | +mkdir -p "${LOG_DIR}" |
| 28 | + |
| 29 | +if [ ! -d "${RESULTS_DIR}" ]; then |
| 30 | + echo "Error: No coverage results found in ${RESULTS_DIR}." |
| 31 | + exit 1 |
| 32 | +fi |
| 33 | + |
| 34 | +# Unzip any zipped coverage results |
| 35 | +find "$RESULTS_DIR" -type f -name '*.zip' -print0 | xargs -0 -P "${MAX_JOBS}" -I {} unzip -q -o {} -d "$RESULTS_DIR" |
| 36 | + |
| 37 | +# Identify modified packages |
| 38 | +if [[ "${TEST_ALL_PACKAGES}" == "true" ]]; then |
| 39 | + modified_packages=$(ls -d packages/*/ | cut -d/ -f1,2 | sort -u) |
| 40 | +else |
| 41 | + # Default to comparing against previous commit |
| 42 | + modified_packages=$(git diff --name-only HEAD~1 -- packages | cut -d/ -f1,2 | sort -u) |
| 43 | +fi |
| 44 | + |
| 45 | +# Function to report coverage for a single package |
| 46 | +report_package_coverage() { |
| 47 | + local pkg=$1 |
| 48 | + local pkg_name_clean=$(echo "${pkg}" | sed 's|/$||' | sed 's|/|_|g') |
| 49 | + local pkg_log="${LOG_DIR}/${pkg_name_clean}.log" |
| 50 | + local pkg_status="${LOG_DIR}/${pkg_name_clean}.status" |
| 51 | + |
| 52 | + # Use /dev/shm for the combined coverage file to reduce disk I/O |
| 53 | + local pkg_coverage_db="/dev/shm/.coverage.${pkg_name_clean}" |
| 54 | + |
| 55 | + set +e |
| 56 | + ( |
| 57 | + # Find coverage databases belonging specifically to this package |
| 58 | + shopt -s nullglob |
| 59 | + local pkg_files=("${RESULTS_DIR}/.coverage."*"."*"${pkg_name_clean}" "${RESULTS_DIR}"/*/".coverage."*"."*"${pkg_name_clean}") |
| 60 | + shopt -u nullglob |
| 61 | + |
| 62 | + # Handle explicit skip via .coveragerc |
| 63 | + if [ -f "${pkg}/.coveragerc" ] && grep -Eq "fail_under\s*=\s*0" "${pkg}/.coveragerc"; then |
| 64 | + echo "Package has fail_under = 0, passing instantly with 100% success (even without coverage files)" > "${pkg_log}" |
| 65 | + echo 0 > "${pkg_status}" |
| 66 | + return |
| 67 | + fi |
| 68 | + |
| 69 | + if [ ${#pkg_files[@]} -eq 0 ]; then |
| 70 | + echo "Warning: No coverage results found for ${pkg}" > "${pkg_log}" |
| 71 | + echo 1 > "${pkg_status}" |
| 72 | + return |
| 73 | + fi |
| 74 | + |
| 75 | + pushd "${pkg}" > /dev/null |
| 76 | + |
| 77 | + # Combine databases |
| 78 | + COVERAGE_FILE="${pkg_coverage_db}" coverage combine "${pkg_files[@]}" >> "${pkg_log}" 2>&1 |
| 79 | + |
| 80 | + # Generate report |
| 81 | + if [ -f ".coveragerc" ]; then |
| 82 | + echo "Using package-specific configuration: ${pkg}/.coveragerc" > "${pkg_log}" |
| 83 | + if grep -q "fail_under" ".coveragerc"; then |
| 84 | + COVERAGE_FILE="${pkg_coverage_db}" coverage report --rcfile=".coveragerc" --include="$PWD/**" >> "${pkg_log}" 2>&1 |
| 85 | + else |
| 86 | + echo "No fail_under specified in ${pkg}/.coveragerc, enforcing default" >> "${pkg_log}" |
| 87 | + COVERAGE_FILE="${pkg_coverage_db}" coverage report --rcfile=".coveragerc" --include="$PWD/**" --fail-under="${DEFAULT_FAIL_UNDER}" >> "${pkg_log}" 2>&1 |
| 88 | + fi |
| 89 | + else |
| 90 | + echo "No .coveragerc found for ${pkg}, enforcing default" > "${pkg_log}" |
| 91 | + COVERAGE_FILE="${pkg_coverage_db}" coverage report --include="$PWD/**" --fail-under="${DEFAULT_FAIL_UNDER}" >> "${pkg_log}" 2>&1 |
| 92 | + fi |
| 93 | + |
| 94 | + echo $? > "${pkg_status}" |
| 95 | + popd > /dev/null |
| 96 | + ) |
| 97 | + set -e |
| 98 | +} |
| 99 | + |
| 100 | +# Run coverage reporting in parallel |
| 101 | +for pkg in ${modified_packages}; do |
| 102 | + if [ -d "${pkg}" ]; then |
| 103 | + # Limit concurrent jobs |
| 104 | + while [ $(jobs -r | wc -l) -ge "${MAX_JOBS}" ]; do |
| 105 | + sleep 0.1 |
| 106 | + done |
| 107 | + report_package_coverage "${pkg}" & |
| 108 | + fi |
| 109 | +done |
| 110 | + |
| 111 | +wait |
| 112 | + |
| 113 | +# Summary and exit |
| 114 | +failed_packages=() |
| 115 | +passed_packages=() |
| 116 | + |
| 117 | +for pkg in ${modified_packages}; do |
| 118 | + if [ -d "${pkg}" ]; then |
| 119 | + pkg_name_clean=$(echo "${pkg}" | sed 's|/$||' | sed 's|/|_|g') |
| 120 | + pkg_log="${LOG_DIR}/${pkg_name_clean}.log" |
| 121 | + pkg_status="${LOG_DIR}/${pkg_name_clean}.status" |
| 122 | + |
| 123 | + echo "============================================================" |
| 124 | + echo "Evaluating coverage for package: ${pkg}" |
| 125 | + echo "============================================================" |
| 126 | + [ -f "${pkg_log}" ] && cat "${pkg_log}" |
| 127 | + |
| 128 | + status=$(cat "${pkg_status}" 2>/dev/null || echo 1) |
| 129 | + if [ "${status}" -ne 0 ]; then |
| 130 | + failed_packages+=("${pkg}") |
| 131 | + else |
| 132 | + passed_packages+=("${pkg}") |
| 133 | + fi |
| 134 | + fi |
| 135 | +done |
| 136 | + |
| 137 | +echo "============================================================" |
| 138 | +echo "Coverage Evaluation Summary" |
| 139 | +echo "============================================================" |
| 140 | +if [ ${#passed_packages[@]} -gt 0 ]; then |
| 141 | + echo "Passed packages:" |
| 142 | + for pkg in "${passed_packages[@]}"; do |
| 143 | + echo " - ${pkg}" |
| 144 | + done |
| 145 | +fi |
| 146 | + |
| 147 | +if [ ${#failed_packages[@]} -gt 0 ]; then |
| 148 | + echo "Failed packages:" |
| 149 | + for pkg in "${failed_packages[@]}"; do |
| 150 | + echo " - ${pkg}" |
| 151 | + done |
| 152 | + exit 1 |
| 153 | +fi |
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