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SuggestionStore::GetCompletions to check exit code of invoked applica… #2160

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d3e8b47
SuggestionStore::GetCompletions to check exit code of invoked applica…
baradgur Apr 11, 2023
1c23816
SuggestionStore::GetCompletions to check exit code of invoked applica…
baradgur Apr 12, 2023
65a92f5
added tests to SuggestionStore::GetCompletions
baradgur Apr 13, 2023
d8adba7
use async read for standard output for SuggestionStore::GetCompletions
baradgur Apr 14, 2023
8b8e3b7
stopping async read in SuggestionStore::GetCompletions gracefully
baradgur Apr 14, 2023
8895dfd
Merge remote-tracking branch 'remotes/origin/main' into issue-2137
baradgur Jun 7, 2023
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SuggestionStore::GetCompletions to check exit code of invoked applica… 
…tion

Fix #2147
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@baradgur
baradgur committed Apr 11, 2023
commit d3e8b473c1c92f83386f61c3a4fb2e53211f8b26
2 changes: 1 addition & 1 deletion src/System.CommandLine.Suggest/SuggestionStore.cs
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Expand Up @@ -44,7 +44,7 @@ public string GetCompletions(string exeFileName, string suggestionTargetArgument

Task<string> readToEndTask = process.StandardOutput.ReadToEndAsync();

if (readToEndTask.Wait(timeout))
if (readToEndTask.Wait(timeout) && process.HasExited && process.ExitCode == 0)
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@jonsequitur jonsequitur Apr 11, 2023

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The else block might need some additional checks as well. It doesn't appear that we have code coverage over both of these code branches.

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@KalleOlaviNiemitalo KalleOlaviNiemitalo Apr 12, 2023

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I'm not sure this is entirely reliable. If the child process first closes its standard output and then exits, then readToEndTask.Wait might complete while process.HasExited is still false. And maybe that can even happen if the child process does not intentionally delay exiting. It might be more reliable to also call Process.WaitForExit(TimeSpan) with a small grace period.

{
result = readToEndTask.Result;
}
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