Bug 1828733 - change example_config_env to default_config_env. r=ng DONTBUILD

In most cases, the scripts report errors including suggestions on how to resolve the

issue.  If you're seeing an error message referring you to this README.md file, the

likely issue is that you're missing environment variables that should be set in a

config_env file in your root directory.  An example of that file can be found at

[dom/media/webrtc/third_party_build/example_config_env](https://searchfox.org/mozilla-central/rev/ef0aa879e94534ffd067a3748d034540a9fc10b0/dom/media/webrtc/third_party_build/example_config_env).

config_env file in .moz-fast-forward.  The default for that file can be found at

dom/media/webrtc/third_party_build/default_config_env.

# MOZ_NEXT_LIBWEBRTC_MILESTONE and MOZ_NEXT_FIREFOX_REL_TARGET are

# not used during fast-forward processing, but facilitate generating this

# example config.  To generate an example config for the next update, run

# bash dom/media/webrtc/third_party_build/update_example_config_env.sh

# default config.  To generate an default config for the next update, run

# bash dom/media/webrtc/third_party_build/update_default_config_env.sh

export MOZ_NEXT_LIBWEBRTC_MILESTONE=112

export MOZ_NEXT_FIREFOX_REL_TARGET=116

rm -f $STATE_DIR/resume_state

# If there is no cache file for the branch-head lookups done in

# update_example_config.sh, go ahead and copy our small pre-warmed

# update_default_config.sh, go ahead and copy our small pre-warmed

# version.

if [ ! -f $STATE_DIR/milestone.cache ]; then

  cp $SCRIPT_DIR/pre-warmed-milestone.cache $STATE_DIR/milestone.cache

set -eEuo pipefail

ERROR_HELP=$"

An error has occurred running $SCRIPT_DIR/write_example_config.py

An error has occurred running $SCRIPT_DIR/write_default_config.py

"

./mach python $SCRIPT_DIR/write_example_config.py \

./mach python $SCRIPT_DIR/write_default_config.py \

  --bug-number $NEW_BUG_NUMBER \

  --milestone $MOZ_NEXT_LIBWEBRTC_MILESTONE \

  --release-target $MOZ_NEXT_FIREFOX_REL_TARGET \

  > $SCRIPT_DIR/example_config_env

  > $SCRIPT_DIR/default_config_env

if [ ! -f $MOZ_CONFIG_PATH ]; then

  echo "Creating default config file at $MOZ_CONFIG_PATH"

  cp $SCRIPT_DIR/example_config_env $MOZ_CONFIG_PATH

  cp $SCRIPT_DIR/default_config_env $MOZ_CONFIG_PATH

fi

source $MOZ_CONFIG_PATH