Run an action after a non zero return code in a csharp script

[ChristopherL-STCU]

I trying to use the commit message linter example to prevent invalid commit messages. It seems if the csharp script returns with a code of 1 then all execution is halted. But I'd like to perform a soft reset of the commit if there is a non zero return code. Is that possible?

I'd like to do something like this:

#!/bin/sh
. "$(dirname "$0")/_/husky.sh"

message=$(git log -n1 --pretty="%s")
dotnet husky run --name "commit-message-linter" --args "$message"
if [ $? -eq 1 ]
then
    git reset --soft HEAD^
fi

Is something like this possible? Or some other way to accomplish what I'm trying to do?

[alirezanet]

Did you try to use the exec command directly in the hook?
e.g

dotnet husky exec "CsharpScriptPath.csx" --args "$message"

I think you don't need the husky run because it will stop if receives any non-zero exit code. but exec should work fine.

[ChristopherL-STCU]

Thank you for the response. That doesn't seem to work either. If I change the hook to:

#!/bin/sh
. "$(dirname "$0")/_/husky.sh"

message=$(git log -n1 --pretty="%s")
dotnet husky exec ./.husky/csx/commit-message-linter.csx --args "$message"
echo
echo Great work! 🥂
echo

The content after the exec is only echoed when the return code is 0. When the return code is 1 then none of the echo content is displayed.

[alirezanet]

You are right, I have another question why are you trying to get the last committed message message=$(git log -n1 --pretty="%s") instead of preventing the commit in the first place (using commit-msg hook)?

I'll try to find a solution to get the csx script output back. till then please explain the use-case a little bit, I still don't understand what are you trying to achieve? Although you can move the entire logic to the csx file. the whole point of it is to use c# code instead of sh scripts.

[alirezanet]

I managed to get the exit code by disabling husky.sh script which is fine in this case.
e.g commit-msg hook

#!/bin/sh
# prevent breaking the execuition by disabling hook handler
#. "$(dirname "$0")/_/husky.sh"

message=$(git log -n1 --pretty="%s")
dotnet husky exec .husky/linter.csx --args "$message"

if [ $? -eq 0 ]
then
  echo "Success: "
  exit 0
else
  echo "Failure: " >&2
  exit 1
fi

e.g linter.csx

using System.Text.RegularExpressions;

private var pattern = @"^(?=.{1,90}$)(?:build|feat|ci|chore|docs|fix|perf|refactor|revert|style|test)(?:\(.+\))*(?::).{4,}(?:#\d+)*(?<![\.\s])$";

var filePath = Args[0];
private var msg = "";

// file mode
if (File.Exists(filePath))
   msg = File.ReadAllLines(filePath)[0];
else // msg-mode
   msg = Args[0];

if (Regex.IsMatch(msg, pattern))
   return 0;

Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Invalid commit message");

return 1;

this works, but still git log -n1 --pretty="%s" doesn't give you the current commit message unless you use it for example in the post-commit hook which is weird

[ChristopherL-STCU]

Mainly because I took a very winding path and ended up here. So not a legitimate reason to do it like that, at least for this. Thank you for all of your help. 👏