react-native/scripts/circleci/check_cache.sh
Héctor Ramos c9d756285a Clear cache to resolve iOS, tvOS workflow
Summary:
tvOS and iOS workflows were flaky, apparently due to a stale cache that contained a problematic version of the Metro dependency. Thanks to motiz88 for identifying the potential cause of flakiness in https://github.com/react-native-community/react-native-releases/issues/2#issuecomment-371905315.

https://circleci.com/workflow-run/440180a2-e888-4f27-bec9-b8e5d9be6708

[GENERAL] [MINOR] [CI] - Resolve iOS, tvOS failures in Circle
Closes https://github.com/facebook/react-native/pull/18304

Differential Revision: D7220150

Pulled By: hramos

fbshipit-source-id: 0f5e68c779dfce44e6deb8b813a3ac9e25a2ab97
2018-03-09 15:11:46 -08:00

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#!/bin/bash
set -e
# Make sure we don't accidentally restore a cache that contains the Metro
# filename issue that was fixed in Metro 0.25, originally introduced in
# D6752278. Once fixed, this was causing sporadic failures in the iOS
# and tvOS workflows as the issue persisted in the cached node_modules
#
# The filename issue can be summarized as follows:
# A version of Metro was published to npm with HmrClient.js and
# HmrClient.js.flow files, while the repo contains HMRClient.js and
# HMRClient.js.flow. This was due to a case issue in the publisher's
# host machine.
# The issue this is checking for is manifested by the presence of all
# of the following files: HmrClient.js, HMRClient.js, HmrClient.js.flow,
# HMRClient.js.flow.
EXPECTED='1'
ACTUAL=$(ls node_modules/metro/src/lib/bundle-modules/*.js | xargs | awk '{print tolower($0)}' | tr ' ' '\n' | grep hmrclient.js | wc -l | tr -d '[:space:]')
if [ "$EXPECTED" != "$ACTUAL" ]; then
echo "HmrClient.js crept into the cache?"
echo $(ls node_modules/metro/src/lib/bundle-modules/H*lient.js)
exit 1
fi