Change default branch to main (#355)

.circleci/config.yml

@@ -140,4 +140,4 @@ workflows:
             - docs
           filters:
             branches:
-              only: master
+              only: main

README.md

@@ -1,7 +1,7 @@
 # Firefox Telemetry Python ETL
 
 [![CircleCI](https://circleci.com/gh/mozilla/python_mozetl.svg?style=svg)](https://circleci.com/gh/mozilla/python_mozetl)
-[![codecov](https://codecov.io/gh/mozilla/python_mozetl/branch/master/graph/badge.svg)](https://codecov.io/gh/mozilla/python_mozetl)
+[![codecov](https://codecov.io/gh/mozilla/python_mozetl/branch/main/graph/badge.svg)](https://codecov.io/gh/mozilla/python_mozetl)
 
 This repository is a collection of ETL jobs for Firefox Telemetry.
 
@@ -47,7 +47,7 @@ It may be used with [ATMO](https://analysis.telemetry.mozilla.org/) to manually
 
 In an SSH session with an ATMO cluster, grab a copy of the script:
 ```
-$ wget https://raw.githubusercontent.com/mozilla/python_mozetl/master/bin/mozetl-submit.sh
+$ wget https://raw.githubusercontent.com/mozilla/python_mozetl/main/bin/mozetl-submit.sh
 ```
 Push your code to your own fork, where the job has been added to `mozetl.cli`. Then run it.
 

bin/mozetl-databricks.py

@@ -160,7 +160,7 @@ def parse_arguments():
         help="The URL to the git repository e.g. https://github.com/mozilla/python_mozetl.git",
     )
     parser.add_argument(
-        "--git-branch", type=str, default="master", help="The branch to run e.g. master"
+        "--git-branch", type=str, default="main", help="The branch to run e.g. main"
     )
     parser.add_argument(
         "--node-type-id", type=str, default="c3.4xlarge", help="EC2 Node type"

bin/mozetl-submit.sh

@@ -53,7 +53,7 @@ fi
 # set script environment variables
 MOZETL_ARGS=${MOZETL_COMMAND:-$@}
 MOZETL_GIT_PATH=${MOZETL_GIT_PATH:-https://github.com/mozilla/python_mozetl.git}
-MOZETL_GIT_BRANCH=${MOZETL_GIT_BRANCH:-master}
+MOZETL_GIT_BRANCH=${MOZETL_GIT_BRANCH:-main}
 MOZETL_SPARK_MASTER=${MOZETL_SPARK_MASTER:-yarn}
 MOZETL_SUBMISSION_METHOD=${MOZETL_SUBMISSION_METHOD:-spark}