在Ceedling中以命令钩子运行Valgrind时遇错误的解决办法

按照教程配置Ceedling与Valgrind配合使用，测试通过时一切正常，但当测试用例失败或Valgrind检测到内存泄漏时，Ceedling会抛出异常终止运行。

Ceedling运行时的错误输出如下：

> Shell executed command:
`valgrind --track-origins=yes --leak-check=full --show-leak-kinds=all --errors-for-leak-kinds=all --error-exitcode=10 build/test/out/test_soc_soh_module/test_soc_soh_module.out`
> Produced output: 
test_soc_soh_module.c:24:test_calculates_soc_correctly:FAIL: Expected 13 Was 1

-----------------------
1 Tests 1 Failures 0 Ignored 
FAIL
==62521== Memcheck, a memory error detector
==62521== Copyright (C) 2002-2024, and GNU GPL'd, by Julian Seward et al.
==62521== Using Valgrind-3.24.0 and LibVEX; rerun with -h for copyright info
==62521== Command: build/test/out/test_soc_soh_module/test_soc_soh_module.out
==62521== 
==62521== 
==62521== HEAP SUMMARY:
==62521==     in use at exit: 0 bytes in 0 blocks
==62521==   total heap usage: 1 allocs, 1 frees, 4,096 bytes allocated
==62521== 
==62521== All heap blocks were freed -- no leaks are possible
==62521== 
==62521== For lists of detected and suppressed errors, rerun with: -s
==62521== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
> And terminated with exit code: [1]

🪲 ERROR: Exception raised in plugin `command_hooks` within build hook :post_test_fixture_execute
Plugin | CommandHooks > :post_test...
🧨 EXCEPTION: undefined method `split' for nil:NilClass
🌱 Ceedling could not complete operations because of errors
Plugin | CommandHooks > :post_error...

单独执行上述Valgrind命令时，能正常输出测试失败信息和Valgrind检测结果，无异常：

valgrind --track-origins=yes --leak-check=full --show-leak-kinds=all --errors-for-leak-kinds=all --error-exitcode=10 build/test/out/test_soc_soh_module/test_soc_soh_module.out
==62928== Memcheck, a memory error detector
==62928== Copyright (C) 2002-2024, and GNU GPL'd, by Julian Seward et al.
==62928== Using Valgrind-3.24.0 and LibVEX; rerun with -h for copyright info
==62928== Command: build/test/out/test_soc_soh_module/test_soc_soh_module.out
==62928== 
test_soc_soh_module.c:24:test_calculates_soc_correctly:FAIL: Expected 13 Was 1

-----------------------
1 Tests 1 Failures 0 Ignored 
FAIL
==62928== 
==62928== HEAP SUMMARY:
==62928==     in use at exit: 0 bytes in 0 blocks
==62928==   total heap usage: 1 allocs, 1 frees, 1,024 bytes allocated
==62928== 
==62928== All heap blocks were freed -- no leaks are possible
==62928== 
==62928== For lists of detected and suppressed errors, rerun with: -s
==62928== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)

• 修复钩子脚本的nil值判断：异常提示是undefined method 'split' for nil:NilClass，说明command_hooks插件的后置钩子脚本中，某个变量未正确赋值就调用了split方法。找到project.yml配置的钩子脚本路径，在调用split前添加变量非空判断逻辑。
• 区分退出码场景：测试失败时测试程序返回退出码1，Valgrind检测到泄漏时返回配置的--error-exitcode=10，钩子脚本需要分别处理这两种场景的输出解析，避免因测试失败导致的输出格式变化引发变量为空。
• 调整Ceedling或Valgrind配置：修改project.yml中Valgrind的调用参数，或者调整Ceedling对测试输出的解析规则，确保在测试失败或泄漏检测时，插件能正确捕获输出内容，不会出现空变量。

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