GitHub中Codecov上传失败：本地生成.gcov但CI中无法找到

背景 #

我正在尝试使用GitHub的CI/CD功能，但遇到了问题。我有一个极简仓库，设定为当develop分支推送至GitHub时，自动运行单元测试和覆盖率测试。

问题概述 #

单元测试已通过，但Codecov上传失败，报错如下：

['error'] None of the following appear to exist as files: ./build/gcov/*.gcov

但在本地Ubuntu环境中运行相同的Makefile时，./build/gcov/目录下确实会生成对应的.gcov文件。我漏了什么配置吗？

详细信息 #

你可以克隆该仓库自行测试，以下是关键文件和运行记录：

.github/workflows/ci.yml 配置文件 #

name: C/C++ CI

on:
  push:
    branches: [ develop ]
  pull_request:
    branches: [ develop ]

jobs:
  build_and_test:
    runs-on: ubuntu-latest
    
    steps:
    - name: Check out repository code
      uses: actions/checkout@v2
    
    - name: Install dependencies
      run: sudo apt-get install -y gcc make lcov
    
    - name: Build and Test
      run: |
        make all
        make coverage

    - name: Upload coverage to Codecov
      uses: codecov/codecov-action@v2
      with:
        files: ./build/gcov/*.gcov
        flags: unittests
        name: codecov-umbrella
        fail_ci_if_error: true

Codecov执行报告 #

Run codecov/codecov-action@v2
==> linux OS detected
https://uploader.codecov.io/latest/linux/codecov.SHA256SUM
==> SHASUM file signed by key id 806bb28aed779869
==> Uploader SHASUM verified (e6aa8429d6ff91eddc7eced927e6ec936364a88fe755eed28b1f627a6499980d  codecov)
==> Running version latest
==> Running version v0.6.3
/home/runner/work/_actions/codecov/codecov-action/v2/dist/codecov -n codecov-umbrella -Q github-action-2.1.0 -Z -f ./build/gcov/*.gcov -F unittests
[2023-10-13T23:28:12.760Z] ['info'] 
     _____          _
    / ____|        | |
   | |     ___   __| | ___  ___ _____   __
   | |    / _ \ / _` |/ _ \ / __/ _ \ \ / /
   | |___| (_) | (_| |  __/ (_| (_) \ V /
    \_____\___/ \__,_|\___|\___\___/ \_/

  Codecov report uploader 0.6.3
[2023-10-13T23:28:12.768Z] ['info'] => Project root located at: /home/runner/work/basic-cicd/basic-cicd
[2023-10-13T23:28:12.769Z] ['info'] -> No token specified or token is empty
[2023-10-13T23:28:12.777Z] ['info'] Searching for coverage files...
[2023-10-13T23:28:12.831Z] ['error'] None of the following appear to exist as files: ./build/gcov/*.gcov
[2023-10-13T23:28:12.831Z] ['error'] There was an error running the uploader: Error while cleaning paths. No paths matched existing files!
Error: Codecov: Failed to properly upload: The process '/home/runner/work/_actions/codecov/codecov-action/v2/dist/codecov' failed with exit code 255

本地运行make coverage的结果 #

以下是本地执行make all ; make coverage的完整记录：

./basic-cicd$ make all ; make coverage
mkdir -p build/obj build/bin build/gcov
gcc -Isrc -Itest -fprofile-arcs -ftest-coverage -c src/a.c -o build/obj/a.o
gcc -Isrc -Itest -fprofile-arcs -ftest-coverage -c src/b.c -o build/obj/b.o
gcc -Isrc -Itest -fprofile-arcs -ftest-coverage test/test_a.c build/obj/a.o test/unity.c -o build/bin/test_runner_a -fprofile-arcs -ftest-coverage
gcc -Isrc -Itest -fprofile-arcs -ftest-coverage test/test_b.c build/obj/b.o test/unity.c -o build/bin/test_runner_b -fprofile-arcs -ftest-coverage
^[[Abuild/bin/test_runner_a
test/test_a.c:38:test_a_init_sets_count_to_zero:PASS
test/test_a.c:39:test_a_set_count_sets_count_correctly:PASS
test/test_a.c:40:test_a_get_count_gets_count_correctly:PASS

-----------------------
3 Tests 0 Failures 0 Ignored
OK
build/bin/test_runner_b
test/test_b.c:53:test_b_init:PASS
test/test_b.c:54:test_b_increment_count:PASS
test/test_b.c:55:test_b_get_count:PASS

-----------------------
3 Tests 0 Failures 0 Ignored
OK
mkdir -p build/obj build/bin build/gcov
build/bin/test_runner_a
test/test_a.c:38:test_a_init_sets_count_to_zero:PASS
test/test_a.c:39:test_a_set_count_sets_count_correctly:PASS
test/test_a.c:40:test_a_get_count_gets_count_correctly:PASS

-----------------------
3 Tests 0 Failures 0 Ignored
OK
build/bin/test_runner_b
test/test_b.c:53:test_b_init:PASS
test/test_b.c:54:test_b_increment_count:PASS
test/test_b.c:55:test_b_get_count:PASS

-----------------------
3 Tests 0 Failures 0 Ignored
OK
mv build/obj/*.gcno build/gcov || true
mv build/obj/*.gcda build/gcov || true
gcov -o build/gcov -r build/obj/*.o || true
File 'src/a.c'
Lines executed:100.00% of 8
Creating 'a.c.gcov'

File 'src/b.c'
Lines executed:100.00% of 8
Creating 'b.c.gcov'

Lines executed:100.00% of 16
mv *.gcov build/gcov || true
./basic-cicd$ ls ./build/gcov/*.gcov
./build/gcov/a.c.gcov  ./build/gcov/b.c.gcov

可以看到，a.c.gcov和b.c.gcov都正常生成在./build/gcov/目录下。

（附言：我的Makefile确实需要优化——它会重复运行两次单元测试，一次用于校验结果，一次用于生成覆盖率数据。如果有修复方案，欢迎提交PR，我会及时更新！）

内容的提问来源于stack exchange，提问作者fearless_fool