Question: rbt post error.

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Yinglei Wu

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Jun 16, 2023, 7:33:41 AM6/16/23

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Hi everyone.

I'm using rbt post [git commitid] command to create postreview, but got this error:

ERROR: Error validating diff

The specified diff file is too large. (HTTP 400, API Error 220)

It looks like my diff is too large, but it's not, it's only a couple lines of code.

I don't know why? And how can I fix this?

Christian Hammond

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Jun 22, 2023, 2:10:22 AM6/22/23

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Hi,

Most likely, it’s trying to build a diff with too many commits.

RBTools tries to guess which “tracking branch” (such as origin/master) commits should be based off of, and will generate a diff between that and HEAD.

If it guesses wrong, your diff might be too large.

You’ll want to do the following:

1. Find out what the nearest tracking branch should be for what you want to post.

2. Make sure your branch is up-to-date with the tracking branch (rebased onto it or the tracking branch is merged in).

3. Pass the tracking branch using the --tracking-branch parameter, or (ideally) set it in .reviewboardrc as TRACKING_BRANCH.

If you run `rbt diff` instead of `rbt post`, you can see what diff it tries to make. If you pass -d (debug), you can see what range of commits it’s using for that diff.

Christian

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