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I am trying to capture the output of this git command (or any for that matter).

git diff-tree --no-commit-id --patch-with-raw -r HEAD  # HEAD or some commit SHA

However, unlike an echo, the following command does not log any output in the GitHub actions log. Nor does it streams the output to a variable. On my local, the same command logs the changes made in the last commit.

# result is empty
result=$(git diff-tree --no-commit-id --patch-with-raw -r HEAD)

What am I missing? How do I capture the output of the above git command?

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2 Answers 2

Reset to default
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Are you using the checkout action to checkout your code? git diff-tree probably doesn't output anything if you're not fetching the history. Try

- uses: actions/checkout@v2
  with:
    fetch-depth: 0
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2 Comments

I was fooled by default fetch-depth: 1 to bear the latest commit. Changed to 5 for now and it works. Happy tears. Thanks so much.
Glad to hear it worked!
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Probably something alike this... in every case with echo:

echo $(git diff-tree --no-commit-id --patch-with-raw -r HEAD)
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1 Comment

No luck: imgur.com/a/gJQzUkD You can see that git status command logs output but the other git diff-tree ... does not. FYI, on my local, the same command logs the changes made in the last commit.

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