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https://issues.apache.org/jira/browse/CASSANDRA-17997?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17624754#comment-17624754
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Derek Chen-Becker commented on CASSANDRA-17997:
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It's very likely for me, because I always delete local branches when I'm done
with them :) In any case, I think there are two parts here:
# Add the "-b" flag to allow overriding the branch, or optionally allow
someone to specify the BASE_BRANCH env var and use the default if not set
# Check to make sure that the base branch exists, and exit with a warning and
useful information if it doesn't
> Improve git branch handling for CircleCI generate.sh
> ----------------------------------------------------
>
> Key: CASSANDRA-17997
> URL: https://issues.apache.org/jira/browse/CASSANDRA-17997
> Project: Cassandra
> Issue Type: Improvement
> Components: CI
> Reporter: Derek Chen-Becker
> Assignee: Derek Chen-Becker
> Priority: Normal
>
> The generate.sh script assumes a base git branch that is local and named
> after the official repo branch (e.g. `cassandra-3.11`). This may not be a
> local branch if the developer has recently cloned the repo and is creating a
> work branch, and will lead to the git commands in generate.sh failing:
>
> ```
> fatal: ambiguous argument 'cassandra-3.11...HEAD': unknown revision or path
> not in the working tree.
> Use '--' to separate paths from revisions, like this:
> 'git <command> [<revision>...] -- [<file>...]'
> ```
> We should be able to make some sanity checks to better guide or warn the
> developer if things aren't set up properly to check against git.
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