Joseph Wu created MESOS-4576:
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Summary: Introduce a stout helper for "which"
Key: MESOS-4576
URL: https://issues.apache.org/jira/browse/MESOS-4576
Project: Mesos
Issue Type: Improvement
Components: stout
Reporter: Joseph Wu
We may want to add a helper to {{stout/os.hpp}} that will natively emulate the
functionality of the Linux utility {{which}}. i.e.
{code}
Option<string> which(const string& command)
{
Option<string> path = os::getenv("PATH");
// Loop through path and return the first one which os::exists(...).
return None();
}
{code}
This helper may be useful:
* for test filters in {{src/tests/environment.cpp}}
* a few tests in {{src/tests/containerizer/port_mapping_tests.cpp}}
* the {{sha512}} utility in {{src/common/command_utils.cpp}}
* as runtime checks in the {{LogrotateContainerLogger}}
* etc.
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