Contributing to Parquet

Pull Requests

We prefer to receive contributions in the form of GitHub pull requests. Please send pull requests against the github.com/apache/parquet-mr repository. If you’ve previously forked Parquet from its old location, you will need to add a remote or update your origin remote to https://github.com/apache/parquet-mr.git Here are a few tips to get your contribution in:

1. Break your work into small, single-purpose patches if possible. It’s much harder to merge in a large change with a lot of disjoint features.
2. Create a JIRA for your patch on the Parquet Project JIRA.
3. Submit the patch as a GitHub pull request against the master branch. For a tutorial, see the GitHub guides on forking a repo and sending a pull request. Prefix your pull request name with the JIRA name (ex: https://github.com/apache/parquet-mr/pull/5).
4. Make sure that your code passes the unit tests. You can run the tests with mvn test in the root directory.
5. Add new unit tests for your code.
6. All Pull Requests are tested automatically on GitHub Actions. TravisCI is also used to run the tests on ARM64 CPU architecture

If you’d like to report a bug but don’t have time to fix it, you can still post it to our issue tracker, or email the mailing list (dev@parquet.apache.org).

Committers

Merging a pull request requires being a committer on the project.

How to merge a Pull request (have an apache and github-apache remote setup):

git remote add github-apache git@github.com:apache/parquet-mr.git
git remote add apache https://gitbox.apache.org/repos/asf?p=parquet-mr.git

run the following command

dev/merge_parquet_pr.py

example output:

Which pull request would you like to merge? (e.g. 34):

Type the pull request number (from https://github.com/apache/parquet-mr/pulls) and hit enter.

=== Pull Request #X ===
title   Blah Blah Blah
source  repo/branch
target  master
url https://api.github.com/repos/apache/parquet-mr/pulls/X

Proceed with merging pull request #3? (y/n):

If this looks good, type y and hit enter.

From gitbox.apache.org:/repos/asf/parquet-mr.git
* [new branch]      master     -> PR_TOOL_MERGE_PR_3_MASTER
Switched to branch 'PR_TOOL_MERGE_PR_3_MASTER'

Merge complete (local ref PR_TOOL_MERGE_PR_3_MASTER). Push to apache? (y/n):

A local branch with the merge has been created. Type y and hit enter to push it to apache master

Counting objects: 67, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (26/26), done.
Writing objects: 100% (36/36), 5.32 KiB, done.
Total 36 (delta 17), reused 0 (delta 0)
To gitbox.apache.org:/repos/asf/parquet-mr.git
   b767ac4..485658a  PR_TOOL_MERGE_PR_X_MASTER -> master
Restoring head pointer to b767ac4e
Note: checking out 'b767ac4e'.

You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by performing another checkout.

If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -b with the checkout command again. Example:

  git checkout -b new_branch_name

HEAD is now at b767ac4... Update README.md
Deleting local branch PR_TOOL_MERGE_PR_X
Deleting local branch PR_TOOL_MERGE_PR_X_MASTER
Pull request #X merged!
Merge hash: 485658a5

Would you like to pick 485658a5 into another branch? (y/n):

For now just say n as we have 1 branch

Website

Release Documentation

To create documentation for a new release of parquet-format create a new .md file under content/en/blog/parquet-format. Please see existing files in that directory as an example.

To create documentation for a new release of parquet-mr create a new .md file under content/en/blog/parquet-mr. Please see existing files in that directory as an example.

Website development and deployment

Staging

To make a change to the staging version of the website:

1. Make a PR against the staging branch in the repository
2. Once the PR is merged, the Build and Deploy Parquet Site job in the deployment workflow will be run, populating the asf-staging branch on this repo with the necessary files.

Do not directly edit the asf-staging branch of this repo

Production

To make a change to the production version of the website:

1. Make a PR against the production branch in the repository
2. Once the PR is merged, the Build and Deploy Parquet Site job in the deployment workflow will be run, populating the asf-site branch on this repo with the necessary files.

Do not directly edit the asf-site branch of this repo